/* Modern Inter Font Import */
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@100;200;300;400;500;600;700;800;900&display=swap");

/* Enhanced Reset and Base Styles */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Automatic theme detection based on system preference */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    /* Inherit dark theme variables when no explicit theme is set */
    color-scheme: dark;
  }
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
  }
}

/* Accessibility: Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Accessibility: High contrast support */
@media (prefers-contrast: high) {
  :root {
    --border-primary: #000000;
    --border-secondary: #000000;
    --text-muted: #000000;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3),
      0 2px 4px -1px rgba(0, 0, 0, 0.2);
  }

  [data-theme="dark"] {
    --border-primary: #ffffff;
    --border-secondary: #ffffff;
    --text-muted: #ffffff;
    --shadow-sm: 0 1px 3px 0 rgba(255, 255, 255, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(255, 255, 255, 0.3),
      0 2px 4px -1px rgba(255, 255, 255, 0.2);
  }
}

/* Modern focus management for accessibility */
*:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Enhanced button accessibility */
button,
.btn,
[role="button"] {
  min-height: 44px;
  min-width: 44px;
  touch-action: manipulation;
}

/* Text scaling support */
@media (max-width: 768px) {
  html {
    font-size: 16px; /* Ensure minimum font size on mobile */
  }
}

:root {
  /* Typography - Modern fluid scales */
  --font-family-primary: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Roboto", "Helvetica Neue", Arial, sans-serif;
  --font-family-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono",
    Consolas, "Courier New", monospace;

  /* Fluid typography using clamp() */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.6rem + 1.375vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.9rem + 1.75vw, 3.5rem);

  /* Line heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;

  /* Spacing scale */
  --space-xs: clamp(0.25rem, 0.2rem + 0.25vw, 0.375rem);
  --space-sm: clamp(0.5rem, 0.4rem + 0.5vw, 0.75rem);
  --space-md: clamp(1rem, 0.8rem + 1vw, 1.5rem);
  --space-lg: clamp(1.5rem, 1.2rem + 1.5vw, 2.25rem);
  --space-xl: clamp(2rem, 1.6rem + 2vw, 3rem);
  --space-2xl: clamp(3rem, 2.4rem + 3vw, 4.5rem);

  /* Modern 2024-2025 Color Palette - Light Mode */
  /* Primary colors based on Mocha Mousse (Pantone Color of the Year 2025) */
  --color-mocha-50: #faf9f7;
  --color-mocha-100: #f2f0eb;
  --color-mocha-200: #e8e4dd;
  --color-mocha-300: #d4ccba;
  --color-mocha-400: #c0b196;
  --color-mocha-500: #a49080; /* Main Mocha Mousse */
  --color-mocha-600: #8a7668;
  --color-mocha-700: #6d5d52;
  --color-mocha-800: #574b42;
  --color-mocha-900: #463d36;

  /* Digital Lavender accent */
  --color-lavender-50: #faf9ff;
  --color-lavender-100: #f1efff;
  --color-lavender-200: #e6e2ff;
  --color-lavender-300: #d1c9ff;
  --color-lavender-400: #b8a9ff;
  --color-lavender-500: #9b87f5; /* Main Digital Lavender */
  --color-lavender-600: #8b6cf5;
  --color-lavender-700: #7c3aed;
  --color-lavender-800: #6d28d9;
  --color-lavender-900: #5b21b6;

  /* Semantic color system */
  --bg-primary: var(--color-mocha-50);
  --bg-secondary: var(--color-mocha-100);
  --bg-tertiary: var(--color-mocha-200);
  --bg-accent: var(--color-lavender-50);
  --bg-surface: #ffffff;
  --bg-overlay: rgba(255, 255, 255, 0.95);

  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-muted: #757575;
  --text-accent: var(--color-lavender-700);
  --text-on-accent: #ffffff;

  --border-primary: var(--color-mocha-300);
  --border-secondary: var(--color-mocha-200);
  --border-accent: var(--color-lavender-300);
  --border-focus: var(--color-lavender-500);

  /* Action colors */
  --accent-color: var(--color-lavender-500);
  --accent-hover: var(--color-lavender-600);
  --accent-active: var(--color-lavender-700);

  /* Status colors with modern palette */
  --success-color: #059669; /* Emerald-600 */
  --success-bg: #ecfdf5; /* Emerald-50 */
  --warning-color: #d97706; /* Amber-600 */
  --warning-bg: #fffbeb; /* Amber-50 */
  --error-color: #dc2626; /* Red-600 */
  --error-bg: #fef2f2; /* Red-50 */
  --info-color: #2563eb; /* Blue-600 */
  --info-bg: #eff6ff; /* Blue-50 */

  /* Shadows with modern depth */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* Glassmorphism and Modern Effects */
  --glass-bg: rgba(255, 255, 255, 0.25);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  --glass-blur: blur(8px);
  --glass-backdrop: saturate(180%) blur(20px);

  /* Neumorphism Variables */
  --neu-light: #ffffff;
  --neu-dark: rgba(163, 177, 198, 0.15);
  --neu-shadow-light: 20px 20px 60px var(--neu-dark);
  --neu-shadow-dark: -20px -20px 60px var(--neu-light);
  --neu-shadow-inset-light: inset 20px 20px 60px var(--neu-dark);
  --neu-shadow-inset-dark: inset -20px -20px 60px var(--neu-light);
  --neu-shadow-pressed: inset 5px 5px 10px var(--neu-dark),
    inset -5px -5px 10px var(--neu-light);

  /* Advanced Animations */
  --transition-bounce: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --transition-smooth: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-elastic: 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);

  /* Micro-interactions */
  --hover-lift: translateY(-2px);
  --hover-scale: scale(1.02);
  --active-scale: scale(0.98);
  --focus-glow: 0 0 0 4px rgba(155, 135, 245, 0.3);

  /* Legacy compatibility */
  --spinner-bg: var(--color-mocha-200);
}

[data-theme="dark"] {
  /* Modern Dark Mode - 2024-2025 Palette */
  /* Inverted Mocha tones for sophisticated dark theme */
  --color-mocha-50: #1a1817;
  --color-mocha-100: #242220;
  --color-mocha-200: #2f2c29;
  --color-mocha-300: #403a35;
  --color-mocha-400: #524b44;
  --color-mocha-500: #6b6056;
  --color-mocha-600: #857a6d;
  --color-mocha-700: #a49687;
  --color-mocha-800: #c4b8a8;
  --color-mocha-900: #e5dcd0;

  /* Enhanced Digital Lavender for dark mode */
  --color-lavender-50: #1e1b2e;
  --color-lavender-100: #2a2548;
  --color-lavender-200: #3d3465;
  --color-lavender-300: #524684;
  --color-lavender-400: #6b5ca6;
  --color-lavender-500: #8b7bd8; /* Brightened for dark mode */
  --color-lavender-600: #a697e5;
  --color-lavender-700: #c2b5f0;
  --color-lavender-800: #ddd4f7;
  --color-lavender-900: #f5f3fc;

  /* Dark mode semantic colors */
  --bg-primary: #0f0f0f;
  --bg-secondary: var(--color-mocha-100);
  --bg-tertiary: var(--color-mocha-200);
  --bg-accent: var(--color-lavender-100);
  --bg-surface: #1a1a1a;
  --bg-overlay: rgba(0, 0, 0, 0.85);

  --text-primary: #f5f5f5;
  --text-secondary: #e1e1e1;
  --text-muted: #a1a1a1;
  --text-accent: var(--color-lavender-400);
  --text-on-accent: #000000;

  --border-primary: var(--color-mocha-400);
  --border-secondary: var(--color-mocha-300);
  --border-accent: var(--color-lavender-400);
  --border-focus: var(--color-lavender-500);

  /* Dark mode action colors */
  --accent-color: var(--color-lavender-500);
  --accent-hover: var(--color-lavender-400);
  --accent-active: var(--color-lavender-300);

  /* Dark mode status colors */
  --success-color: #10b981; /* Emerald-500 */
  --success-bg: #022c22; /* Emerald-950 */
  --warning-color: #f59e0b; /* Amber-500 */
  --warning-bg: #1e1611; /* Amber-950 */
  --error-color: #ef4444; /* Red-500 */
  --error-bg: #1e1117; /* Red-950 */
  --info-color: #3b82f6; /* Blue-500 */
  --info-bg: #0c1a2e; /* Blue-950 */

  /* Dark mode shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4),
    0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4),
    0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5),
    0 10px 10px -5px rgba(0, 0, 0, 0.3);

  /* Dark Mode Glassmorphism */
  --glass-bg: rgba(26, 26, 26, 0.4);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.6);

  /* Dark Mode Neumorphism */
  --neu-light: rgba(255, 255, 255, 0.05);
  --neu-dark: rgba(0, 0, 0, 0.3);
  --neu-shadow-light: 20px 20px 60px var(--neu-dark);
  --neu-shadow-dark: -20px -20px 60px var(--neu-light);
  --neu-shadow-inset-light: inset 20px 20px 60px var(--neu-dark);
  --neu-shadow-inset-dark: inset -20px -20px 60px var(--neu-light);
  --neu-shadow-pressed: inset 5px 5px 10px var(--neu-dark),
    inset -5px -5px 10px var(--neu-light);

  /* Dark Mode Focus Glow */
  --focus-glow: 0 0 0 4px rgba(139, 123, 216, 0.4);

  /* Legacy compatibility */
  --spinner-bg: var(--color-mocha-300);
}

[data-theme="dark"] .exam-card:hover {
  box-shadow: 0 4px 8px rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .exam-input:focus {
  box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.2);
}

[data-theme="dark"] .exam-link {
  color: #64b5f6;
}

[data-theme="dark"] .comment-text a {
  color: #64b5f6;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-weight: 400;
  font-feature-settings: "rlig" 1, "calt" 1;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal),
    color var(--transition-normal);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-md);
}

/* Modern Header with Gradient */
.header {
  text-align: center;
  margin-bottom: var(--space-xl);
  padding: var(--space-xl) var(--space-lg);
  background: linear-gradient(
    135deg,
    var(--color-lavender-600) 0%,
    var(--color-mocha-600) 100%
  );
  color: var(--text-on-accent);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(155, 135, 245, 0.1) 0%,
    rgba(164, 144, 128, 0.1) 100%
  );
  backdrop-filter: blur(1px);
  pointer-events: none;
}

.header h1 {
  margin: 0;
  font-size: var(--text-4xl);
  font-weight: 700;
  letter-spacing: -0.025em;
  position: relative;
  z-index: 1;
}

.header p {
  margin: var(--space-sm) 0 0 0;
  font-size: var(--text-lg);
  opacity: 0.9;
  font-weight: 400;
  position: relative;
  z-index: 1;
}

/* Modern Input Section */
.input-section {
  margin-bottom: var(--space-xl);
}

.input-group {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  align-items: stretch;
}

.line-break {
  display: none;
}

/* Neumorphism Input Styles */
.exam-input {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-family: var(--font-family-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all var(--transition-smooth);
  box-shadow: var(--neu-shadow-inset-light), var(--neu-shadow-inset-dark);
  position: relative;
}

.exam-input:focus {
  outline: none;
  box-shadow: var(--neu-shadow-inset-light), var(--neu-shadow-inset-dark),
    var(--focus-glow);
  background: var(--bg-accent);
}

.exam-input:hover {
  box-shadow: var(--neu-shadow-inset-light), var(--neu-shadow-inset-dark),
    0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Global neumorphism for all inputs, selects, and textareas */
input:not(.exam-input):not([type="radio"]):not([type="checkbox"]),
select,
textarea {
  background: var(--bg-primary);
  border: none;
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  color: var(--text-primary);
  font-family: var(--font-family-primary);
  transition: all var(--transition-smooth);
  box-shadow: var(--neu-shadow-inset-light), var(--neu-shadow-inset-dark);
}

input:not(.exam-input):not([type="radio"]):not([type="checkbox"]):focus,
select:focus,
textarea:focus {
  outline: none;
  box-shadow: var(--neu-shadow-inset-light), var(--neu-shadow-inset-dark),
    var(--focus-glow);
}

input:not(.exam-input):not([type="radio"]):not([type="checkbox"]):hover,
select:hover,
textarea:hover {
  box-shadow: var(--neu-shadow-inset-light), var(--neu-shadow-inset-dark),
    0 2px 6px rgba(0, 0, 0, 0.06);
}

.dark-mode-btn,
.settings-btn {
  padding: var(--space-sm);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  cursor: pointer;
  transition: background-color var(--transition-fast),
    color var(--transition-normal), border-color var(--transition-fast),
    box-shadow var(--transition-fast);
  box-shadow: var(--shadow-sm);
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dark-mode-btn:hover,
.settings-btn:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.dark-mode-btn i {
  transition: transform var(--transition-normal);
  font-size: var(--text-lg);
}

[data-theme="dark"] .dark-mode-btn i:before {
  content: "\f185"; /* fa-sun */
}

.home-btn {
  padding: var(--space-sm);
  background-color: var(--color-mocha-500);
  color: var(--text-on-accent);
  border: 1px solid var(--color-mocha-600);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast),
    transform var(--transition-fast), box-shadow var(--transition-fast);
  margin-right: var(--space-sm);
  box-shadow: var(--shadow-sm);
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 500;
}

.home-btn:hover {
  background-color: var(--color-mocha-600);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.export-btn {
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--accent-color);
  color: var(--text-on-accent);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-family: var(--font-family-primary);
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-fast),
    transform var(--transition-fast), box-shadow var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  box-shadow: var(--shadow-md);
  min-height: 44px;
}

.export-btn:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.export-btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* Modern Loading Section */
.loading-section {
  text-align: center;
  padding: var(--space-xl);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--spinner-bg);
  border-top: 3px solid var(--accent-color);
  border-radius: 50%;
  animation: spin 1s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
  margin: 0 auto var(--space-md);
  position: relative;
}

.spinner::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  right: 2px;
  bottom: 2px;
  border: 2px solid transparent;
  border-top: 2px solid var(--color-lavender-300);
  border-radius: 50%;
  animation: spin 0.8s linear infinite reverse;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Lazy Loading Styles */
.loading-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 2rem;
  background-color: var(--bg-secondary);
  border-radius: 0.5rem;
  border: 2px dashed var(--border-color);
  color: var(--text-muted);
  min-height: 200px;
}

.loading-placeholder .spinner {
  width: 32px;
  height: 32px;
  margin-bottom: 1rem;
}

.loading-placeholder p {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
}

/* Navigation Section */
.navigation-section {
  background-color: var(--bg-secondary);
  padding: 1rem;
  border-radius: 0.5rem;
  margin-bottom: 2rem;
  transition: background-color 0.3s ease;
}

/* Neumorphism Navigation Controls */
.nav-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding: var(--space-md);
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--neu-shadow-light), var(--neu-shadow-dark);
  transition: all var(--transition-smooth);
}

.nav-controls:hover {
  box-shadow: var(--neu-shadow-light), var(--neu-shadow-dark),
    0 4px 12px rgba(0, 0, 0, 0.08);
  transform: var(--hover-scale);
}

.nav-controls-secondary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm);
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--neu-shadow-light), var(--neu-shadow-dark);
  transition: all var(--transition-smooth);
}

.nav-controls-secondary:hover {
  box-shadow: var(--neu-shadow-light), var(--neu-shadow-dark),
    0 3px 10px rgba(0, 0, 0, 0.06);
}

.question-info {
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-btn {
  padding: 0.5rem 1rem;
  background: var(--bg-primary);
  border: none;
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-smooth);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: var(--neu-shadow-light), var(--neu-shadow-dark);
  position: relative;
  overflow: hidden;
}

/* Neumorphism hover effect */
.nav-btn:hover {
  transform: var(--hover-lift);
  box-shadow: var(--neu-shadow-light), var(--neu-shadow-dark),
    0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Neumorphism active/pressed state */
.nav-btn:active {
  transform: var(--active-scale);
  box-shadow: var(--neu-shadow-pressed);
  transition: all 0.1s ease;
}

/* Enhanced focus state */
.nav-btn:focus-visible {
  box-shadow: var(--neu-shadow-light), var(--neu-shadow-dark), var(--focus-glow);
  outline: none;
}

/* Global Neumorphism for buttons */
.btn,
button:not(.nav-btn):not(.dark-mode-btn):not(.stats-tab):not(.close-btn) {
  background: var(--bg-primary);
  border: none;
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-smooth);
  box-shadow: var(--neu-shadow-light), var(--neu-shadow-dark);
  font-family: var(--font-family-primary);
  font-weight: 500;
  position: relative;
  overflow: hidden;
}

.btn:hover,
button:not(.nav-btn):not(.dark-mode-btn):not(.stats-tab):not(.close-btn):hover {
  transform: var(--hover-lift);
  box-shadow: var(--neu-shadow-light), var(--neu-shadow-dark),
    0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn:active,
button:not(.nav-btn):not(.dark-mode-btn):not(.stats-tab):not(
    .close-btn
  ):active {
  transform: var(--active-scale);
  box-shadow: var(--neu-shadow-pressed);
  transition: all 0.1s ease;
}

.btn:focus-visible,
button:not(.nav-btn):not(.dark-mode-btn):not(.stats-tab):not(
    .close-btn
  ):focus-visible {
  box-shadow: var(--neu-shadow-light), var(--neu-shadow-dark), var(--focus-glow);
  outline: none;
}

.nav-btn.secondary {
  background-color: var(--text-muted);
  color: white;
  border-color: var(--text-muted);
}

.nav-btn.secondary:hover {
  background-color: var(--text-secondary);
}

.question-jump {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.question-jump input {
  width: 150px;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Question Section with Glassmorphism */
.question-section {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
  transition: all var(--transition-smooth);
  box-shadow: var(--glass-shadow);
  position: relative;
  overflow: hidden;
}

/* Glassmorphism fallback for browsers without backdrop-filter support */
@supports not (backdrop-filter: blur(20px)) {
  .question-section {
    background: var(--bg-surface);
    border: 1px solid var(--border-secondary);
    box-shadow: var(--shadow-md);
  }
}

/* Enhanced glassmorphism on hover */
.question-section:hover {
  transform: var(--hover-lift);
  box-shadow: var(--glass-shadow), 0 12px 40px 0 rgba(31, 38, 135, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.question-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.question-header h2 {
  font-size: var(--text-2xl);
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.025em;
}

.exam-link {
  color: #1f77b4;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

.exam-link:hover {
  text-decoration: underline;
}

.question-content {
  margin-bottom: 2rem;
}

.question-text {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--text-primary);
  font-weight: 400;
}

.question-text strong {
  font-weight: 600;
}

/* Answers Section */
.answers-section {
  margin-bottom: 2rem;
}

.answer-instructions {
  background-color: rgba(23, 162, 184, 0.1);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  border-radius: 0.375rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-left: 4px solid #17a2b8;
}

.answer-instructions.success {
  background-color: rgba(76, 175, 80, 0.1);
  color: var(--text-primary);
  border-left-color: var(--success-color);
}

.answer-instructions.warning {
  background-color: rgba(255, 152, 0, 0.1);
  color: var(--text-primary);
  border-left-color: var(--warning-color);
}

.answer-instructions.error {
  background-color: rgba(244, 67, 54, 0.1);
  color: var(--text-primary);
  border-left-color: var(--error-color);
}

.disclaimer-message {
  background-color: rgba(255, 152, 0, 0.1);
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  margin-top: 1rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  border-left: 4px solid var(--warning-color);
}

.disclaimer-message i {
  color: var(--warning-color);
}

/* Question Statistics */
.question-stats {
  display: flex;
  gap: 1rem;
  padding: 0.5rem 1rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-light);
  border-radius: 0.375rem;
  margin-bottom: 1rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.question-stat-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.question-stat-item i {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.question-stat-item span {
  font-weight: 500;
}

.answers-list {
  margin-bottom: var(--space-md);
}

.answer-option {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  margin-bottom: var(--space-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
  user-select: none;
  color: var(--text-primary);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: var(--leading-normal);
  position: relative;
}

.answer-option:hover {
  border-color: var(--border-accent);
  background-color: var(--bg-accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.answer-option.selected {
  border-color: var(--accent-color);
  background-color: var(--bg-accent);
  box-shadow: var(--shadow-md);
}

.answer-option.correct {
  border-color: var(--success-color);
  background-color: var(--success-bg);
  box-shadow: var(--shadow-md);
}

.answer-option.incorrect {
  border-color: var(--error-color);
  background-color: var(--error-bg);
  box-shadow: var(--shadow-md);
}

.answer-option.correct-not-selected {
  border-color: var(--warning-color);
  background-color: var(--warning-bg);
  box-shadow: var(--shadow-md);
}

.answer-option.disabled {
  cursor: not-allowed;
  opacity: 0.8;
}

.answer-letter {
  font-weight: 600;
  color: var(--text-secondary);
}

.answer-controls {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.validate-btn,
#validateBtn,
button.validate-btn,
button#validateBtn.validate-btn {
  padding: 0.75rem 1.5rem !important;
  background: linear-gradient(
    135deg,
    #28a745 0%,
    #20c997 100%
  ) !important; /* Dégradé vert */
  color: white !important;
  border: none !important;
  border-radius: 0.5rem !important;
  cursor: pointer !important;
  transition: all 0.3s ease !important;
  display: flex !important;
  align-items: center !important;
  gap: 0.5rem !important;
  font-weight: 500 !important;
  box-shadow: 0 2px 8px rgba(40, 167, 69, 0.3) !important;
  position: relative !important;
  overflow: hidden !important;
}

.validate-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s ease;
}

.validate-btn:hover::before {
  left: 100%;
}

.validate-btn:hover,
#validateBtn:hover,
button.validate-btn:hover,
button#validateBtn.validate-btn:hover {
  background: linear-gradient(135deg, #218838 0%, #1ea085 100%) !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 4px 15px rgba(40, 167, 69, 0.4) !important;
}

.validate-btn:disabled,
#validateBtn:disabled,
button.validate-btn:disabled,
button#validateBtn.validate-btn:disabled {
  background: var(--text-muted) !important;
  cursor: not-allowed !important;
  transform: none !important;
  box-shadow: none !important;
  opacity: 0.5 !important;
}

.reset-btn,
#resetBtn,
button.reset-btn,
button#resetBtn.reset-btn {
  padding: 0.75rem 1.5rem !important;
  background: linear-gradient(
    135deg,
    #dc3545 0%,
    #fd7e14 100%
  ) !important; /* Dégradé rouge/orange */
  color: white !important;
  border: none !important;
  border-radius: 0.5rem !important;
  cursor: pointer !important;
  transition: all 0.3s ease !important;
  display: flex;
  align-items: center !important;
  gap: 0.5rem !important;
  font-weight: 500 !important;
  box-shadow: 0 2px 8px rgba(220, 53, 69, 0.3) !important;
  position: relative !important;
  overflow: hidden !important;
}

.reset-btn::before,
#resetBtn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s ease;
}

.reset-btn:hover::before,
#resetBtn:hover::before {
  left: 100%;
}

.reset-btn:hover,
#resetBtn:hover,
button.reset-btn:hover,
button#resetBtn.reset-btn:hover {
  background: linear-gradient(135deg, #c82333 0%, #e8650e 100%) !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 4px 15px rgba(220, 53, 69, 0.4) !important;
}

.highlight-btn,
#highlightBtn,
button.highlight-btn,
button#highlightBtn.highlight-btn {
  padding: 0.75rem 1.5rem !important;
  background: linear-gradient(
    135deg,
    #ffc107 0%,
    #ff8c00 100%
  ) !important; /* Dégradé orange/jaune */
  color: #000000 !important;
  border: none !important;
  border-radius: 0.5rem !important;
  cursor: pointer !important;
  transition: all 0.3s ease !important;
  display: flex !important;
  align-items: center !important;
  gap: 0.5rem !important;
  font-weight: 500 !important;
  box-shadow: 0 2px 8px rgba(255, 193, 7, 0.3) !important;
  position: relative !important;
  overflow: hidden !important;
}

.highlight-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  transition: left 0.5s ease;
}

.highlight-btn:hover::before {
  left: 100%;
}

.highlight-btn:hover,
#highlightBtn:hover,
button.highlight-btn:hover,
button#highlightBtn.highlight-btn:hover {
  background: linear-gradient(135deg, #e0a800 0%, #e67e00 100%) !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 4px 15px rgba(255, 193, 7, 0.4) !important;
}

.highlight-btn.active,
#highlightBtn.active,
button.highlight-btn.active,
button#highlightBtn.highlight-btn.active {
  background: linear-gradient(135deg, #e0a800 0%, #d39e00 100%) !important;
  box-shadow: 0 2px 12px rgba(224, 168, 0, 0.4) !important;
  transform: translateY(-1px) !important;
}

.highlight-btn.active:hover,
#highlightBtn.active:hover,
button.highlight-btn.active:hover,
button#highlightBtn.highlight-btn.active:hover {
  background: linear-gradient(135deg, #d39e00 0%, #cc9500 100%) !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 4px 15px rgba(224, 168, 0, 0.5) !important;
}

.highlight-btn:disabled,
#highlightBtn:disabled,
button.highlight-btn:disabled,
button#highlightBtn.highlight-btn:disabled {
  background: var(--text-muted) !important;
  cursor: not-allowed !important;
  transform: none !important;
  box-shadow: none !important;
  opacity: 0.5 !important;
}

/* Force styles avec spécificité maximale pour contourner les conflits CSS */
html body .answer-controls #validateBtn,
html body .answer-controls button#validateBtn {
  background: linear-gradient(135deg, #28a745 0%, #20c997 100%) !important;
  color: white !important;
  border: none !important;
}

html body .answer-controls #highlightBtn,
html body .answer-controls button#highlightBtn {
  background: linear-gradient(135deg, #ffc107 0%, #ff8c00 100%) !important;
  color: #000000 !important;
  border: none !important;
}

/* Discussion Section */
.discussion-section {
  border-top: 1px solid var(--border-light);
  padding-top: 2rem;
}

.discussion-toggle,
#discussionToggle,
button.discussion-toggle {
  padding: 0.75rem 1.5rem !important;
  background: linear-gradient(
    135deg,
    #6f42c1 0%,
    #007bff 100%
  ) !important; /* Dégradé violet/bleu */
  color: white !important;
  border: none !important;
  border-radius: 0.5rem !important;
  cursor: pointer !important;
  transition: all 0.3s ease !important;
  display: flex !important;
  align-items: center !important;
  gap: 0.5rem !important;
  margin-bottom: 1rem !important;
  font-weight: 500 !important;
  box-shadow: 0 2px 8px rgba(111, 66, 193, 0.3) !important;
  position: relative !important;
  overflow: hidden !important;
}

.discussion-toggle::before,
#discussionToggle::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s ease;
}

.discussion-toggle:hover::before,
#discussionToggle:hover::before {
  left: 100%;
}

.discussion-toggle:hover,
#discussionToggle:hover,
button.discussion-toggle:hover {
  background: linear-gradient(135deg, #5a359a 0%, #0056b3 100%) !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 4px 15px rgba(111, 66, 193, 0.4) !important;
}

.discussion-toggle i,
#discussionToggle i {
  font-size: 1em;
  margin-right: 0.25rem;
}

.discussion-content {
  background-color: var(--bg-secondary);
  border-radius: 0.5rem;
  padding: 1.5rem;
  transition: background-color 0.3s ease;
}

.discussion-content h3 {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.discussion-comment {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 0.375rem;
  padding: 1rem;
  margin-bottom: 1rem;
  transition: background-color 0.3s ease;
}

.comment-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.comment-votes {
  font-weight: 600;
  color: var(--success-color);
}

.comment-text {
  color: var(--text-secondary);
}

.comment-text a {
  color: #007bff;
  text-decoration: none;
  word-break: break-all;
  transition: color 0.3s ease;
}

.comment-text a:hover {
  text-decoration: underline;
}

/* Available Exams */
.available-exams {
  background-color: var(--bg-secondary);
  border-radius: 0.5rem;
  padding: 2rem;
  margin-bottom: 2rem;
  transition: background-color 0.3s ease;
}

.available-exams h3 {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.exams-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.loading-exams {
  text-align: center;
  padding: 2rem;
  grid-column: 1 / -1;
}

.loading-exams .spinner {
  width: 30px;
  height: 30px;
  margin: 0 auto 1rem;
}

.exam-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.exam-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  background-color: var(--bg-accent);
}

.exam-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--color-lavender-500),
    var(--color-mocha-500)
  );
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.exam-card:hover::before {
  opacity: 1;
}

/* Exam card header with code and category */
.exam-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
}

.exam-code {
  font-weight: 600;
  font-size: var(--text-xl);
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

.exam-category {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-muted);
  background-color: var(--bg-accent);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Exam name styling */
.exam-name {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  line-height: 1.4;
  text-align: center;
}

/* Question count styling */
.exam-count {
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

/* Category filter styling */
.exam-card[data-category] {
  position: relative;
}

.exam-card[data-category*="CIS"]::before {
  background: linear-gradient(
    90deg,
    var(--color-blue-500),
    var(--color-cyan-500)
  );
}

.exam-card[data-category*="CSA"]::before {
  background: linear-gradient(
    90deg,
    var(--color-green-500),
    var(--color-emerald-500)
  );
}

.exam-card[data-category*="CAD"]::before {
  background: linear-gradient(
    90deg,
    var(--color-purple-500),
    var(--color-violet-500)
  );
}

.exam-card[data-category*="CAS"]::before {
  background: linear-gradient(
    90deg,
    var(--color-orange-500),
    var(--color-amber-500)
  );
}

/* Exams header with stats */
.exams-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.exams-stats {
  font-size: var(--text-sm);
  color: var(--text-muted);
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.exams-stats .stat-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.exams-stats .stat-number {
  font-weight: 600;
  color: var(--text-primary);
}

/* Modal with Glassmorphism */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  transition: all var(--transition-smooth);
}

.modal-content {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-smooth);
  transform: scale(0.95);
  animation: modalFadeIn var(--transition-bounce) forwards;
}

/* Glassmorphism fallback for modals */
@supports not (backdrop-filter: blur(20px)) {
  .modal-content {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-xl);
  }
}

/* Modal entrance animation */
@keyframes modalFadeIn {
  0% {
    opacity: 0;
    transform: scale(0.9) translateY(-20px);
  }
  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-light);
  flex-shrink: 0;
}

.modal-header h2 {
  margin: 0;
  color: var(--text-primary);
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
  padding: 0.25rem;
}

.close-btn:hover {
  color: var(--text-secondary);
}

.modal-body {
  padding: 1.5rem;
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.setting-group {
  margin-bottom: 2rem;
}

.setting-group h3 {
  margin-bottom: 1rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  cursor: pointer;
  user-select: none;
  color: var(--text-primary);
  transition: color 0.3s ease;
}

.toggle-label input[type="checkbox"] {
  display: none;
}

/* Neumorphism Toggle Slider */
.toggle-slider {
  width: 50px;
  height: 24px;
  background: var(--bg-primary);
  border-radius: 12px;
  position: relative;
  transition: all var(--transition-smooth);
  box-shadow: var(--neu-shadow-inset-light), var(--neu-shadow-inset-dark);
}

.toggle-slider:before {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--bg-primary);
  top: 2px;
  left: 2px;
  transition: all var(--transition-smooth);
  box-shadow: var(--neu-shadow-light), var(--neu-shadow-dark);
}

.toggle-label input[type="checkbox"]:checked + .toggle-slider {
  background-color: var(--accent-color);
}

.toggle-label input[type="checkbox"]:checked + .toggle-slider:before {
  transform: translateX(26px);
}

/* Messages */
.error-message,
.success-message {
  padding: 1rem;
  border-radius: 0.375rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.error-message {
  background-color: rgba(244, 67, 54, 0.1);
  color: var(--text-primary);
  border: 1px solid var(--error-color);
  border-left: 4px solid var(--error-color);
}

.success-message {
  background-color: rgba(76, 175, 80, 0.1);
  color: var(--text-primary);
  border: 1px solid var(--success-color);
  border-left: 4px solid var(--success-color);
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }

  .header h1 {
    font-size: 2rem;
  }

  .input-group {
    flex-wrap: wrap;
    gap: 0.375rem;
  }

  .exam-input {
    min-width: 0;
    flex: 1;
  }

  .home-btn {
    flex-shrink: 0;
  }

  .line-break {
    display: block;
    flex-basis: 100%;
    height: 0;
  }

  .dark-mode-btn,
  .settings-btn,
  .statistics-btn {
    padding: 0.75rem;
    flex-shrink: 0;
    min-width: 44px;
  }

  .question-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .exam-link {
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    text-decoration: none;
    color: var(--text-secondary);
    transition: all 0.2s ease;
  }

  .exam-link:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--text-muted);
  }

  .nav-controls {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-controls-secondary {
    flex-direction: column;
    gap: 1rem;
  }

  .answer-controls {
    flex-direction: column;
  }

  .answer-controls button {
    width: 100%;
  }

  .exams-list {
    grid-template-columns: 1fr;
  }

  .question-stats {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* Image Styling */
.question-text img {
  max-width: 100%;
  height: auto;
  border-radius: 0.375rem;
  margin: 1rem 0;
}

/* Code Styling */
.question-text code {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-family: "Courier New", monospace;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.question-text pre {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  padding: 1rem;
  border-radius: 0.375rem;
  overflow-x: auto;
  margin: 1rem 0;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Highlight Animation */
@keyframes highlight {
  0% {
    background-color: transparent;
  }
  50% {
    background-color: rgba(255, 152, 0, 0.3);
  }
  100% {
    background-color: transparent;
  }
}

[data-theme="dark"] .highlight-animation {
  animation: highlight-dark 1s ease-in-out;
}

@keyframes highlight-dark {
  0% {
    background-color: transparent;
  }
  50% {
    background-color: rgba(255, 152, 0, 0.2);
  }
  100% {
    background-color: transparent;
  }
}

.highlight-animation {
  animation: highlight 1s ease-in-out;
}

/* Legal Disclaimer */
.legal-disclaimer {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 2rem;
  overflow: hidden;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.disclaimer-content {
  display: flex;
  align-items: center;
  padding: 1rem;
  background: rgba(255, 193, 7, 0.1);
  border-bottom: 1px solid rgba(255, 193, 7, 0.3);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.disclaimer-content i {
  color: var(--warning-color);
  font-size: 1.2rem;
  margin-right: 0.75rem;
  flex-shrink: 0;
}

.disclaimer-content div {
  flex: 1;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.disclaimer-content a {
  text-decoration: none;
  font-weight: 500;
  color: var(--text-primary);
}

.disclaimer-content a:hover {
  text-decoration: underline;
}

.legal-info-expanded {
  padding: 1.5rem;
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.legal-info-expanded h4 {
  margin: 0 0 1rem 0;
  color: var(--text-primary);
  font-size: 1.1rem;
}

.legal-info-expanded ul {
  margin: 0 0 1rem 0;
  padding-left: 1.5rem;
}

.legal-info-expanded li {
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.4;
}

.legal-info-expanded p {
  margin: 1rem 0 0 0;
  padding: 0.75rem;
  background: rgba(33, 150, 243, 0.1);
  border-left: 4px solid #2196f3;
  border-radius: 4px;
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Dark mode specific styles for legal disclaimer */
[data-theme="dark"] .disclaimer-content {
  background: rgba(255, 152, 0, 0.15);
  border-bottom: 1px solid rgba(255, 152, 0, 0.3);
}

[data-theme="dark"] .legal-info-expanded p {
  background: rgba(100, 181, 246, 0.15);
  border-left: 4px solid #64b5f6;
}

/* Statistics Button */
.statistics-btn {
  padding: 0.75rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.3s ease;
}

.statistics-btn:hover {
  background-color: var(--bg-tertiary);
}

/* Statistics Modal */
.statistics-modal {
  max-width: 1000px;
  width: 95vw;
  max-height: 85vh;
  height: 80vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.stats-tabs {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border-secondary);
  padding-bottom: var(--space-md);
  flex-shrink: 0;
}

.stats-content {
  flex: 1;
  overflow-y: auto;
  padding-right: var(--space-sm);
}

.stats-content::-webkit-scrollbar {
  width: 6px;
}

.stats-content::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}

.stats-content::-webkit-scrollbar-thumb {
  background: var(--border-primary);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.stats-content::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

.stats-tab {
  padding: var(--space-sm) var(--space-md);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 500;
  font-size: var(--text-sm);
  min-height: 44px;
}

.stats-tab:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.stats-tab.active {
  background-color: var(--accent-color);
  color: var(--text-on-accent);
  border-color: var(--accent-color);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.stats-tab-content {
  display: none;
}

.stats-tab-content.active {
  display: block;
}

/* Statistics Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--accent-color);
  color: white;
  font-size: 1.5rem;
}

.stat-icon.success {
  background-color: var(--success-color);
}

.stat-icon.error {
  background-color: var(--error-color);
}

.stat-icon.warning {
  background-color: var(--warning-color);
}

.stat-info {
  flex: 1;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Statistics Chart */
.stats-chart {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.stats-chart canvas {
  max-width: 100%;
  height: auto;
}

/* Exam Statistics List */
.exam-stats-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.exam-stat-item {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: center;
}

.exam-stat-info h4 {
  margin: 0 0 0.5rem 0;
  color: var(--text-primary);
  font-size: 1.125rem;
}

.exam-stat-details {
  display: flex;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.exam-stat-score {
  text-align: right;
}

.exam-stat-score .score-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.exam-stat-score .score-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.exam-stat-progress {
  width: 100%;
  height: 6px;
  background-color: var(--bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 0.5rem;
}

.exam-stat-progress-bar {
  height: 100%;
  background-color: var(--success-color);
  transition: width 0.3s ease;
}

/* Multi-segment progress bar */
.multi-progress-bar {
  width: 100%;
  height: 100%;
  display: flex;
  border-radius: 3px;
  overflow: hidden;
}

.progress-segment {
  height: 100%;
  transition: width 0.3s ease;
}

.progress-segment.correct {
  background-color: var(--success-color);
}

.progress-segment.incorrect {
  background-color: var(--error-color);
}

.progress-segment.preview {
  background-color: var(--warning-color);
}

/* Sessions List */
.sessions-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.session-item {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
}

.session-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.session-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.session-date {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.session-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.session-stat {
  text-align: center;
}

.session-stat-value {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.session-stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.session-progress {
  width: 100%;
  height: 8px;
  background-color: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}

.session-progress-bar {
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--success-color) 0%,
    var(--warning-color) 100%
  );
  transition: width 0.3s ease;
}

/* Progress Charts */
.progress-charts {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
}

.progress-charts canvas {
  max-width: 100%;
  height: auto;
}

/* Statistics Actions */
.stats-actions {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
}

.export-stats-btn {
  padding: 0.75rem 1.5rem;
  background-color: var(--success-color);
  color: white;
  border: none;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.export-stats-btn:hover {
  background-color: #218838;
}

.reset-stats-btn {
  padding: 0.75rem 1.5rem;
  background-color: var(--error-color);
  color: white;
  border: none;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.reset-stats-btn:hover {
  background-color: #c82333;
}

/* Empty State */
.stats-empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}

.stats-empty i {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.stats-empty h3 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.stats-empty p {
  margin-bottom: 1.5rem;
}

.stats-empty button {
  padding: 0.75rem 1.5rem;
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.stats-empty button:hover {
  background-color: var(--accent-hover);
}

/* Responsive Design for Statistics */
@media (max-width: 768px) {
  .modal {
    padding: 0.5rem;
    align-items: flex-start;
  }

  .statistics-modal {
    max-height: 95vh;
    height: 95vh;
    width: 100%;
    max-width: 100%;
    margin: 0;
    border-radius: 0.5rem;
  }

  .modal-header {
    padding: 1rem;
  }

  .modal-body {
    padding: 0.5rem 1rem 1rem;
  }

  .stats-tabs {
    flex-wrap: wrap;
    gap: 0.25rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
  }

  .stats-tab {
    flex: 1;
    min-width: 100px;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
  }

  .stats-tab i {
    font-size: 0.875rem;
  }

  .stats-content {
    padding-right: 0;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
  }

  .stat-card {
    padding: 1rem;
    gap: 0.75rem;
  }

  .stat-icon {
    width: 40px;
    height: 40px;
    font-size: 1.25rem;
  }

  .stat-value {
    font-size: 1.5rem;
  }

  .stat-label {
    font-size: 0.75rem;
  }

  .exam-stats-list {
    gap: 0.75rem;
  }

  .exam-stat-item {
    grid-template-columns: 1fr;
    padding: 1rem;
    gap: 0.75rem;
  }

  .exam-stat-score {
    text-align: left;
  }

  .exam-stat-score .score-value {
    font-size: 1.25rem;
  }

  .exam-stat-details {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .sessions-list {
    gap: 0.75rem;
  }

  .session-item {
    padding: 1rem;
  }

  .session-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .session-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }

  .session-stat-value {
    font-size: 1.125rem;
  }

  .stats-actions {
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
    padding-top: 0.75rem;
  }

  .export-stats-btn,
  .reset-stats-btn {
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    justify-content: center;
  }

  .stats-empty {
    padding: 2rem 1rem;
  }

  .stats-empty i {
    font-size: 2.5rem;
  }

  .stats-chart {
    padding: 1rem;
  }

  .progress-charts {
    padding: 1rem;
  }
}

/* Mobile Small Screens */
@media (max-width: 480px) {
  .input-group {
    gap: 0.25rem;
    flex-wrap: wrap;
  }

  .exam-input {
    min-width: 0;
    flex: 1;
  }

  .home-btn {
    flex-shrink: 0;
  }

  .line-break {
    display: block;
    flex-basis: 100%;
    height: 0;
  }

  .dark-mode-btn,
  .settings-btn,
  .statistics-btn {
    padding: 0.625rem;
    min-width: 40px;
  }

  .statistics-modal {
    height: 100vh;
    max-height: 100vh;
    border-radius: 0;
  }

  .modal {
    padding: 0;
  }

  .modal-header {
    padding: 0.75rem;
  }

  .modal-body {
    padding: 0.75rem;
  }

  .stats-tabs {
    gap: 0.125rem;
  }

  .stats-tab {
    min-width: 80px;
    padding: 0.5rem 0.5rem;
    font-size: 0.75rem;
  }

  .stats-tab span {
    display: none;
  }

  .stat-card {
    padding: 0.75rem;
    gap: 0.5rem;
  }

  .stat-icon {
    width: 36px;
    height: 36px;
    font-size: 1.125rem;
  }

  .stat-value {
    font-size: 1.25rem;
  }

  .session-stats {
    grid-template-columns: 1fr;
  }

  .exam-stat-item {
    padding: 0.75rem;
  }

  .session-item {
    padding: 0.75rem;
  }

  .stats-actions {
    gap: 0.5rem;
  }

  .export-stats-btn,
  .reset-stats-btn {
    padding: 0.625rem 1rem;
    font-size: 0.8125rem;
  }
}

/* Dark Mode Statistics */
[data-theme="dark"] .stat-card:hover {
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .session-progress-bar {
  background: linear-gradient(90deg, #4caf50 0%, #ff9800 100%);
}

/* Favorites and Notes System */

.favorites-section {
  margin-bottom: 1.5rem;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: 0.5rem;
}

.favorites-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.favorite-btn {
  padding: 0.5rem 0.75rem;
  background-color: transparent;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.favorite-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.favorite-btn.active {
  background-color: transparent;
  color: #000000; /* Étoile noire en mode clair */
  border-color: #000000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transform: translateY(-1px);
}

.favorite-btn.active:hover {
  background-color: rgba(0, 0, 0, 0.05);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}

.favorite-btn.active i {
  color: #000000;
  text-shadow: none;
}

/* Dark mode specific styling for favorites */
[data-theme="dark"] .favorite-btn.active {
  background-color: transparent;
  color: #ffffff; /* Étoile blanche en mode sombre */
  border-color: #ffffff;
  box-shadow: 0 2px 8px rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .favorite-btn.active:hover {
  background-color: rgba(255, 255, 255, 0.05);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

[data-theme="dark"] .favorite-btn.active i {
  color: #ffffff;
  text-shadow: none;
}

.favorite-btn i {
  font-size: 1.1rem;
}

.add-category-btn {
  padding: 0.5rem 0.75rem;
  background-color: var(--success-color);
  border: 1px solid var(--success-color);
  border-radius: 0.375rem;
  color: white;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.add-category-btn:hover {
  background-color: #218838;
}

.note-btn {
  padding: 0.5rem 0.75rem;
  background-color: transparent;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-right: 0.5rem;
}

.note-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.note-btn.active {
  background-color: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

.note-btn.active:hover {
  background-color: var(--accent-hover);
}

/* Full-width note section */
.question-note-full-width {
  margin: 1.5rem 0;
  padding: 1.5rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: 0.75rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
  width: 100%;
}

.note-header {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-light);
}

.note-header h4 {
  margin: 0;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.note-header i {
  color: var(--accent-color);
}

/* Note Read View */
.note-read-view {
  display: block;
}

.question-note-full-width .note-display-text {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 0.5rem;
  padding: 1.25rem;
  min-height: 4rem;
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-wrap: break-word;
  margin-bottom: 1.25rem;
  transition: background-color 0.3s ease;
  width: 100%;
  box-sizing: border-box;
}

.note-display-text:empty::before {
  content: "No note added yet.";
  color: var(--text-muted);
  font-style: italic;
}

.note-read-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
  align-items: center;
}

.question-note-full-width .edit-note-btn {
  padding: 0.5rem 1rem;
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: 0.375rem;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.edit-note-btn:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
}

/* Note Edit View */
.note-edit-view {
  display: none;
}

.question-note-full-width textarea {
  width: 100%;
  padding: 1.25rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.6;
  resize: vertical;
  min-height: 120px;
  transition: border-color 0.2s ease, background-color 0.3s ease;
  box-sizing: border-box;
}

.question-note-full-width textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(255, 75, 75, 0.1);
}

.question-note-full-width .note-actions,
.question-note-full-width .note-edit-actions,
.question-note-full-width .note-read-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 0;
  justify-content: flex-end;
  align-items: center;
}

.question-note-full-width .save-note-btn {
  padding: 0.5rem 1rem;
  background-color: var(--success-color);
  border: 1px solid var(--success-color);
  border-radius: 0.375rem;
  color: white;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.save-note-btn:hover {
  background-color: #218838;
}

.question-note-full-width .cancel-note-btn {
  padding: 0.5rem 1rem;
  background-color: var(--text-muted);
  border: 1px solid var(--text-muted);
  border-radius: 0.375rem;
  color: white;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.cancel-note-btn:hover {
  background-color: var(--text-secondary);
}

/* Category Modal */
.category-input-group {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.category-input-group input {
  flex: 1;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: 1rem;
  transition: border-color 0.2s ease, background-color 0.3s ease;
}

.category-input-group input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(255, 75, 75, 0.1);
}

.add-new-category-btn {
  padding: 0.75rem 1rem;
  background-color: var(--success-color);
  border: 1px solid var(--success-color);
  border-radius: 0.375rem;
  color: white;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.add-new-category-btn:hover {
  background-color: #218838;
}

.custom-categories-list h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
  font-size: 1.1rem;
}

.custom-categories-list {
  max-height: 300px;
  overflow-y: auto;
}

.category-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: 0.375rem;
  margin-bottom: 0.5rem;
  transition: background-color 0.2s ease;
}

.category-item:hover {
  background-color: var(--bg-tertiary);
}

.category-name {
  font-weight: 500;
  color: var(--text-primary);
}

.remove-category-btn {
  padding: 0.25rem 0.5rem;
  background-color: var(--error-color);
  border: 1px solid var(--error-color);
  border-radius: 0.25rem;
  color: white;
  cursor: pointer;
  transition: background-color 0.2s ease;
  font-size: 0.8rem;
}

.remove-category-btn:hover {
  background-color: #c82333;
}

/* Difficulty Rating System */
.difficulty-rating {
  border-top: 1px solid var(--border-light);
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.difficulty-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  flex-shrink: 0;
  white-space: nowrap;
}

.difficulty-label::before {
  content: "🎯";
  font-size: 0.9rem;
}

.difficulty-controls {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  flex-wrap: nowrap;
  justify-content: flex-end;
  flex: 1;
}

.difficulty-btn {
  padding: 0.35rem 0.6rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  font-weight: 500;
  min-width: 65px;
  justify-content: center;
  position: relative;
  height: 28px;
  flex-shrink: 0;
}

.difficulty-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.difficulty-btn i {
  font-size: 0.9rem;
}

/* Easy Button Styles */
.difficulty-btn.easy.active {
  background-color: rgba(34, 197, 94, 0.2) !important;
  color: var(--success-color) !important;
  border-color: var(--success-color) !important;
  box-shadow: 0 2px 8px rgba(34, 197, 94, 0.3) !important;
  font-weight: 600 !important;
}

.difficulty-btn.easy.active:hover {
  background-color: rgba(34, 197, 94, 0.25);
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
  transform: translateY(-2px);
}

/* Medium Button Styles */
.difficulty-btn.medium.active {
  background-color: rgba(251, 146, 60, 0.2) !important;
  color: var(--warning-color) !important;
  border-color: var(--warning-color) !important;
  box-shadow: 0 2px 8px rgba(251, 146, 60, 0.3) !important;
  font-weight: 600 !important;
}

.difficulty-btn.medium.active:hover {
  background-color: rgba(251, 146, 60, 0.25);
  box-shadow: 0 4px 12px rgba(251, 146, 60, 0.3);
  transform: translateY(-2px);
}

/* Hard Button Styles */
.difficulty-btn.hard.active {
  background-color: rgba(239, 68, 68, 0.2) !important;
  color: var(--error-color) !important;
  border-color: var(--error-color) !important;
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3) !important;
  font-weight: 600 !important;
}

.difficulty-btn.hard.active:hover {
  background-color: rgba(239, 68, 68, 0.25);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
  transform: translateY(-2px);
}

/* Clear Button Styles */
.difficulty-btn.clear {
  min-width: 28px;
  padding: 0.35rem;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.difficulty-btn.clear:hover {
  background-color: var(--error-bg);
  color: var(--error-color);
  border-color: var(--error-color);
}

/* Dark Mode Support */
[data-theme="dark"] .difficulty-btn.easy.active {
  background-color: rgba(34, 197, 94, 0.2);
  color: #4ade80;
  border-color: rgba(34, 197, 94, 0.5);
  box-shadow: 0 2px 8px rgba(34, 197, 94, 0.3);
}

[data-theme="dark"] .difficulty-btn.medium.active {
  background-color: rgba(251, 146, 60, 0.2);
  color: #fb923c;
  border-color: rgba(251, 146, 60, 0.5);
  box-shadow: 0 2px 8px rgba(251, 146, 60, 0.3);
}

[data-theme="dark"] .difficulty-btn.hard.active {
  background-color: rgba(239, 68, 68, 0.2);
  color: #ef4444;
  border-color: rgba(239, 68, 68, 0.5);
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

[data-theme="dark"] .difficulty-btn.clear:hover {
  background-color: rgba(239, 68, 68, 0.2);
  color: #ef4444;
  border-color: rgba(239, 68, 68, 0.5);
}

/* Responsive Design for Favorites */
@media (max-width: 768px) {
  /* Keep favorites controls horizontal on tablets */
  .favorites-controls {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
  }

  /* Difficulty Rating Tablet Styles - only this section changes */
  .difficulty-rating {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.5rem !important;
  }

  .difficulty-label {
    text-align: center;
    justify-content: center !important;
  }

  .difficulty-controls {
    justify-content: center !important;
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .favorites-section:not([style*="display: none"]) {
    padding: 0.75rem;
    margin-bottom: 1rem;
    display: flex !important;
    flex-direction: column !important;
    gap: 1rem !important;
  }

  .favorites-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 0.75rem;
    align-items: stretch;
  }

  .favorite-btn {
    grid-column: 1;
    grid-row: 1;
    padding: 0.75rem;
    justify-content: center;
    min-touch-target: 44px;
    font-size: 1.1rem;
  }

  /* Difficulty Rating Mobile Styles */
  .difficulty-rating {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.75rem !important;
    justify-content: flex-start !important;
  }

  .difficulty-label {
    font-size: 0.8rem;
    margin: 0 !important;
    text-align: center;
    justify-content: center !important;
    white-space: normal;
  }

  .difficulty-controls {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: auto auto;
    gap: 0.5rem;
    width: 100%;
    justify-content: stretch !important;
    flex: none !important;
  }

  .difficulty-btn {
    padding: 0.75rem 0.5rem;
    min-width: 0;
    min-height: 44px;
    font-size: 0.8rem;
    flex-direction: column;
    gap: 0.25rem;
  }

  .difficulty-btn i {
    font-size: 1rem;
  }

  .difficulty-btn span {
    font-size: 0.75rem;
    line-height: 1;
  }

  .difficulty-btn.clear {
    grid-column: 1 / -1;
    grid-row: 2;
    min-width: 0;
    width: 100%;
    justify-self: stretch;
  }

  .difficulty-btn.clear span {
    display: none;
  }

  .note-btn {
    grid-column: 2;
    grid-row: 1;
    padding: 0.75rem;
    justify-content: center;
    min-touch-target: 44px;
    font-size: 1.1rem;
  }

  .add-category-btn {
    grid-column: 2;
    grid-row: 2;
    padding: 0.75rem;
    justify-content: center;
    min-touch-target: 44px;
    font-size: 1.1rem;
  }

  /* Ensure all buttons have proper touch targets */
  .favorite-btn i,
  .note-btn i,
  .add-category-btn i {
    font-size: 1.2rem;
  }

  .question-note {
    padding: 0.75rem;
  }

  .note-actions {
    flex-direction: column;
  }

  .save-note-btn,
  .cancel-note-btn {
    justify-content: center;
  }
}

/* Favorites Management Styles */
.favorites-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}

.settings-action-btn {
  padding: 0.75rem 1.25rem;
  border-radius: 0.375rem;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 140px;
  justify-content: center;
}

.settings-action-btn.export-btn {
  background-color: var(--success-color);
  color: white;
}

.settings-action-btn.export-btn:hover {
  background-color: #218838;
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.settings-action-btn.import-btn {
  background-color: var(--accent-color);
  color: white;
}

.settings-action-btn.import-btn:hover {
  background-color: #e04747;
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.settings-action-btn.reset-btn {
  background-color: var(--error-color);
  color: white;
}

.settings-action-btn.reset-btn:hover {
  background-color: #c82333;
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.setting-description {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.4;
  margin: 0;
}

/* Responsive Design for Favorites Management */
@media (max-width: 768px) {
  .favorites-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
  }

  .favorites-actions #resetFavoritesBtn {
    grid-column: 1 / -1; /* Reset button spans full width */
  }

  .settings-action-btn {
    width: 100%;
    min-width: unset;
  }
}

@media (max-width: 480px) {
  .favorites-actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .settings-action-btn {
    padding: 0.625rem 1rem;
    font-size: 0.85rem;
  }
}

/* Changelog Styles */
.changelog-btn {
  padding: 0.75rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.3s ease;
}

.changelog-btn:hover {
  background-color: var(--bg-tertiary);
}

/* Export Modal Styles */
.export-modal-content {
  max-width: 600px;
  max-height: 90vh;
  width: 90vw;
}

.export-options-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.export-section {
  border: 1px solid var(--border-light);
  border-radius: 0.5rem;
  padding: 1rem;
  background-color: var(--bg-secondary);
}

.export-section h3 {
  margin: 0 0 1rem 0;
  color: var(--text-primary);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.export-format-options,
.export-filter-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
}

.export-content-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 0.75rem;
}

.radio-option,
.checkbox-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  border: 1px solid var(--border-light);
  border-radius: 0.375rem;
  cursor: pointer;
  transition: all 0.2s ease;
  background-color: var(--bg-primary);
}

/* Special layout for content filter options only */
.export-filter-options .radio-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 60px;
}

.export-filter-options .radio-option .option-main {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
}

.export-filter-options .radio-option .option-main .main-text {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.export-filter-options .radio-option .option-main i {
  width: 20px;
  text-align: center;
  flex-shrink: 0;
  font-size: 16px;
}

.radio-option:hover,
.checkbox-option:hover {
  border-color: var(--accent-color);
  background-color: var(--bg-tertiary);
}

.radio-option:has(input:disabled),
.checkbox-option:has(input:disabled) {
  cursor: not-allowed !important;
  opacity: 0.5 !important;
}

.radio-option:has(input:disabled):hover,
.checkbox-option:has(input:disabled):hover {
  border-color: var(--border-light) !important;
  background-color: var(--bg-primary) !important;
}

.radio-option input[type="radio"],
.checkbox-option input[type="checkbox"] {
  display: none;
}

/* Neumorphism Radio and Checkbox */
.radio-custom,
.checkbox-custom {
  width: 20px;
  height: 20px;
  border: none;
  border-radius: 50%;
  position: relative;
  transition: all var(--transition-smooth);
  flex-shrink: 0;
  background: var(--bg-primary);
  box-shadow: var(--neu-shadow-inset-light), var(--neu-shadow-inset-dark);
}

.checkbox-custom {
  border-radius: 4px;
}

.export-filter-options .radio-custom {
  margin: 0; /* Remove any default margin */
}

.checkbox-custom {
  border-radius: 0.25rem;
}

.radio-option input[type="radio"]:checked + .radio-custom {
  background: var(--accent-color);
  box-shadow: var(--neu-shadow-pressed);
  transform: scale(0.95);
}

.checkbox-option input[type="checkbox"]:checked + .checkbox-custom {
  background: var(--accent-color);
  box-shadow: var(--neu-shadow-pressed);
  transform: scale(0.95);
}

/* Neumorphism hover states for radio and checkbox */
.radio-custom:hover,
.checkbox-custom:hover {
  box-shadow: var(--neu-shadow-inset-light), var(--neu-shadow-inset-dark),
    0 2px 8px rgba(0, 0, 0, 0.1);
  transform: scale(1.05);
}

.export-filter-options .filter-count {
  display: block;
  color: var(--text-muted);
  font-size: 0.85em;
  margin-left: 0; /* No offset - same column as main text */
  line-height: 1.2;
  height: 1.2em;
}

.radio-custom::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: white;
  transform: translate(-50%, -50%) scale(0);
  transition: transform 0.2s ease;
}

.checkbox-custom::after {
  content: "✓";
  position: absolute;
  top: 50%;
  left: 50%;
  color: white;
  font-size: 12px;
  font-weight: bold;
  transform: translate(-50%, -50%) scale(0);
  transition: transform 0.2s ease;
}

.radio-option input[type="radio"]:checked + .radio-custom::after,
.checkbox-option input[type="checkbox"]:checked + .checkbox-custom::after {
  transform: translate(-50%, -50%) scale(1);
}

.radio-option i,
.checkbox-option i {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.category-checkboxes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.5rem;
}

.no-categories-message {
  padding: 1rem;
  text-align: center;
  color: var(--text-muted);
  background: var(--background-secondary);
  border-radius: 0.5rem;
  border: 1px dashed var(--border-color);
  font-style: italic;
}

.no-categories-message i {
  margin-right: 0.5rem;
  color: var(--accent-color);
}

.export-preview {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 0.375rem;
  padding: 1rem;
}

.preview-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.preview-stats {
  display: flex;
  gap: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  padding: 1.5rem;
  border-top: 1px solid var(--border-light);
  background-color: var(--bg-secondary);
}

.btn-primary,
.btn-secondary {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--accent-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--border-color);
  color: var(--text-primary);
}

.changelog-modal-content {
  max-width: 900px;
  max-height: 90vh;
  width: 90vw;
}

.changelog-content {
  max-height: 70vh;
  overflow-y: auto;
  padding: 1rem 0;
}

.changelog-content::-webkit-scrollbar {
  width: 8px;
}

.changelog-content::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: 4px;
}

.changelog-content::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 4px;
}

.changelog-content::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Markdown Styling */
.markdown-content h1 {
  font-size: 2rem;
  color: var(--text-primary);
  margin: 1.5rem 0 1rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-color);
}

.markdown-content h2 {
  font-size: 1.5rem;
  color: var(--text-primary);
  margin: 1.25rem 0 0.75rem 0;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--border-light);
}

.markdown-content h3 {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin: 1.5rem 0 0.75rem 0;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.markdown-content h3 i {
  font-size: 1.1rem;
  flex-shrink: 0;
}

.markdown-content h4 {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin: 0.75rem 0 0.5rem 0;
}

.markdown-content p {
  margin: 0.75rem 0;
  line-height: 1.6;
  color: var(--text-primary);
}

.markdown-content ul,
.markdown-content ol {
  margin: 0.75rem 0 1.25rem 0;
  padding-left: 2rem;
}

.markdown-content li {
  margin: 0.25rem 0;
  color: var(--text-primary);
}

/* Compact nested lists - supports unlimited nesting */
.markdown-content ul ul {
  margin: 0.25rem 0 0.5rem 0;
  padding-left: 1.5rem;
}

.markdown-content ul ul li {
  margin: 0.125rem 0;
}

/* Even more compact for deeply nested lists */
.markdown-content ul ul ul {
  margin: 0.2rem 0 0.3rem 0;
  padding-left: 1.25rem;
}

.markdown-content ul ul ul li {
  margin: 0.1rem 0;
}

.markdown-content strong {
  font-weight: 600;
  color: var(--text-primary);
}

.markdown-content em {
  font-style: italic;
  color: var(--text-secondary);
}

.markdown-content code {
  background-color: var(--bg-tertiary);
  color: var(--accent-color);
  padding: 0.125rem 0.25rem;
  border-radius: 3px;
  font-family: "Monaco", "Menlo", "Ubuntu Mono", monospace;
  font-size: 0.9em;
}

.markdown-content pre {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1rem;
  margin: 1rem 0;
  overflow-x: auto;
  font-family: "Monaco", "Menlo", "Ubuntu Mono", monospace;
}

.markdown-content pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  color: var(--text-primary);
}

.markdown-content blockquote {
  border-left: 4px solid var(--accent-color);
  margin: 1rem 0;
  padding: 0.5rem 1rem;
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
}

.markdown-content a {
  color: var(--accent-color);
  text-decoration: none;
}

.markdown-content a:hover {
  text-decoration: underline;
}

.markdown-content hr {
  border: none;
  height: 2px;
  background-color: var(--border-color);
  margin: 2rem 0;
}

.markdown-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

.markdown-content th,
.markdown-content td {
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  text-align: left;
}

.markdown-content th {
  background-color: var(--bg-secondary);
  font-weight: 600;
}

.markdown-content tr:nth-child(even) {
  background-color: var(--bg-secondary);
}

/* Version badges */
.version-badge {
  display: inline-block;
  background-color: var(--accent-color);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
  margin-right: 0.5rem;
}

.version-badge.unreleased {
  background-color: var(--warning-color);
  color: var(--text-primary);
}

.version-badge.major {
  background-color: var(--error-color);
}

.version-badge.minor {
  background-color: var(--success-color);
}

.version-badge.patch {
  background-color: var(--text-muted);
}

/* Status badges for questions */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.4rem;
  border-radius: 8px;
  font-size: 0.7rem;
  font-weight: 500;
  margin-left: 0.25rem;
  transition: all 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-badge i {
  font-size: 0.6rem;
}

/* Status badge variants */
.status-badge.new {
  background-color: rgba(108, 117, 125, 0.15);
  color: var(--text-muted);
  border: 1px solid rgba(108, 117, 125, 0.3);
}

.status-badge.viewed {
  background-color: rgba(255, 193, 7, 0.15);
  color: var(--warning-color);
  border: 1px solid rgba(255, 193, 7, 0.3);
}

.status-badge.correct {
  background-color: rgba(40, 167, 69, 0.15);
  color: var(--success-color);
  border: 1px solid rgba(40, 167, 69, 0.3);
}

.status-badge.incorrect {
  background-color: rgba(220, 53, 69, 0.15);
  color: var(--error-color);
  border: 1px solid rgba(220, 53, 69, 0.3);
}

.status-badge.preview {
  background-color: rgba(255, 193, 7, 0.2);
  color: #f39c12;
  border: 1px solid rgba(255, 193, 7, 0.4);
}

.status-badge.with-notes {
  background-color: rgba(102, 16, 242, 0.15);
  color: #6610f2;
  border: 1px solid rgba(102, 16, 242, 0.3);
}

.status-badge.categorized {
  background-color: rgba(23, 162, 184, 0.15);
  color: #17a2b8;
  border: 1px solid rgba(23, 162, 184, 0.3);
}

/* Dark mode adjustments for status badges */
[data-theme="dark"] .status-badge.new {
  background-color: rgba(160, 160, 160, 0.2);
  color: var(--text-muted);
  border: 1px solid rgba(160, 160, 160, 0.4);
}

[data-theme="dark"] .status-badge.viewed {
  background-color: rgba(255, 152, 0, 0.2);
  color: #ff9800;
  border: 1px solid rgba(255, 152, 0, 0.4);
}

[data-theme="dark"] .status-badge.correct {
  background-color: rgba(76, 175, 80, 0.2);
  color: #4caf50;
  border: 1px solid rgba(76, 175, 80, 0.4);
}

[data-theme="dark"] .status-badge.incorrect {
  background-color: rgba(244, 67, 54, 0.2);
  color: #f44336;
  border: 1px solid rgba(244, 67, 54, 0.4);
}

[data-theme="dark"] .status-badge.preview {
  background-color: rgba(243, 156, 18, 0.25);
  color: #f39c12;
  border: 1px solid rgba(243, 156, 18, 0.5);
}

[data-theme="dark"] .status-badge.with-notes {
  background-color: rgba(156, 39, 176, 0.2);
  color: #9c27b0;
  border: 1px solid rgba(156, 39, 176, 0.4);
}

/* Difficulty Badge Styles */
.status-badge.difficulty {
  font-weight: 600;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-badge.difficulty.easy {
  background-color: rgba(34, 197, 94, 0.15);
  color: var(--success-color);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.status-badge.difficulty.medium {
  background-color: rgba(251, 146, 60, 0.15);
  color: var(--warning-color);
  border: 1px solid rgba(251, 146, 60, 0.3);
}

.status-badge.difficulty.hard {
  background-color: rgba(239, 68, 68, 0.15);
  color: var(--error-color);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Dark mode difficulty badges */
[data-theme="dark"] .status-badge.difficulty.easy {
  background-color: rgba(34, 197, 94, 0.2);
  color: #4ade80;
  border: 1px solid rgba(34, 197, 94, 0.4);
}

[data-theme="dark"] .status-badge.difficulty.medium {
  background-color: rgba(251, 146, 60, 0.2);
  color: #fb923c;
  border: 1px solid rgba(251, 146, 60, 0.4);
}

[data-theme="dark"] .status-badge.difficulty.hard {
  background-color: rgba(239, 68, 68, 0.2);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.4);
}

[data-theme="dark"] .status-badge.categorized {
  background-color: rgba(0, 188, 212, 0.2);
  color: #00bcd4;
  border: 1px solid rgba(0, 188, 212, 0.4);
}

/* Enhanced question item status indicators */
.question-item-enhanced {
  position: relative;
}

.question-item-enhanced .question-status-indicators {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-top: 0.25rem;
  align-items: center;
}

.question-item-enhanced .primary-status {
  font-weight: 600;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.question-item-enhanced .secondary-badges {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}

/* Hover effects for status badges */
.status-badge:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .status-badge:hover {
  box-shadow: 0 2px 4px rgba(255, 255, 255, 0.1);
}

/* Accessibility improvements */
.status-badge[aria-label] {
  cursor: help;
}

.status-badge:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.loading-spinner {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
}

.loading-spinner i {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.error-state {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
}

.error-state i {
  font-size: 3rem;
  color: var(--error-color);
  margin-bottom: 1rem;
}

.error-state h3 {
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.retry-btn {
  background-color: var(--accent-color);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 0.375rem;
  cursor: pointer;
  font-size: 1rem;
  margin-top: 1rem;
  transition: background-color 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.retry-btn:hover {
  background-color: var(--accent-hover);
}

/* Search Section with Glassmorphism */
.search-section {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  margin-bottom: 2rem;
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

/* Glassmorphism fallback for search section */
@supports not (backdrop-filter: blur(20px)) {
  .search-section {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
  }
}

/* Enhanced search section on hover */
.search-section:hover {
  transform: var(--hover-scale);
  box-shadow: var(--glass-shadow), 0 8px 25px 0 rgba(31, 38, 135, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.search-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-light);
  cursor: pointer;
  transition: background-color 0.2s ease;
  user-select: none; /* Prevent text selection when clicking */
}

.search-header:hover {
  background-color: var(--bg-tertiary);
}

.search-header h3 {
  margin: 0;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.1rem;
}

.toggle-search-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.25rem;
  transition: color 0.2s ease;
  font-size: 1.2rem;
}

.toggle-search-btn i {
  transition: transform 0.3s ease;
}

.toggle-search-btn:hover {
  color: var(--text-primary);
}

.toggle-search-btn.collapsed i {
  transform: rotate(0deg);
}

.toggle-search-btn:not(.collapsed) i {
  transform: rotate(180deg);
}

.search-content {
  padding: 1.5rem;
  transition: max-height 0.3s ease;
}

.search-content.collapsed {
  display: none;
}

.search-controls {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.search-input-group {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.search-input {
  flex: 1;
  min-width: 200px;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: 1rem;
  transition: border-color 0.2s ease, background-color 0.3s ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(255, 75, 75, 0.1);
}

.search-btn {
  padding: 0.75rem 1rem;
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
}

.search-btn:hover {
  background-color: var(--accent-hover);
}

.clear-search-btn {
  padding: 0.75rem;
  background-color: var(--text-muted);
  color: white;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.clear-search-btn:hover {
  background-color: var(--text-secondary);
}

.search-filters {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 0.375rem;
  padding: 1rem;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.filter-label {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  display: block;
}

.filter-options {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: stretch;
}

.filter-group {
  margin-bottom: 1.5rem;
}

.search-filters {
  background: var(--bg-primary);
  border-radius: 0.75rem;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
}

.filter-checkbox {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  user-select: none;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.filter-checkbox:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
  background: var(--bg-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.filter-checkbox:hover::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
  opacity: 0.05;
  z-index: 0;
}

.filter-checkbox input[type="checkbox"] {
  display: none;
}

/* Neumorphism Checkmark */
.checkmark {
  width: 20px;
  height: 20px;
  border: none;
  border-radius: 6px;
  position: relative;
  transition: all var(--transition-smooth);
  background: var(--bg-primary);
  box-shadow: var(--neu-shadow-inset-light), var(--neu-shadow-inset-dark);
  flex-shrink: 0;
  z-index: 1;
  cursor: pointer;
}

.checkmark:hover {
  box-shadow: var(--neu-shadow-inset-light), var(--neu-shadow-inset-dark),
    0 2px 6px rgba(0, 0, 0, 0.08);
  transform: scale(1.05);
}

.filter-checkbox input[type="checkbox"]:checked + .checkmark {
  background: var(--accent-color);
  box-shadow: var(--neu-shadow-pressed);
  transform: scale(0.95);
}

.filter-checkbox input[type="checkbox"]:checked + .checkmark::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

/* Style spécial pour les filtres cochés - utilisation d'une classe JavaScript */
.filter-checkbox.checked {
  background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
  border-color: var(--accent-color);
  color: white;
  box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
  transform: translateY(-1px);
}

.filter-checkbox.checked:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 123, 255, 0.4);
}

/* Style des badges de compteur */
.filter-checkbox .filter-count {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: 0.25rem 0.5rem;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-left: auto;
  min-width: 2rem;
  text-align: center;
  transition: all 0.25s ease;
}

.filter-checkbox.checked .filter-count {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

.filter-checkbox:hover .filter-count {
  background: var(--accent-color);
  color: white;
  transform: scale(1.05);
}

.filter-checkbox.checked:hover .filter-count {
  background: rgba(255, 255, 255, 0.3);
}

/* Style du texte des filtres */
.filter-checkbox .filter-text {
  flex: 1;
  font-weight: 500;
  z-index: 1;
}

.filter-checkbox.checked .filter-text {
  color: white;
}

/* Animation de transition lors du changement d'état */
.filter-checkbox {
  animation: filterSlideIn 0.3s ease-out;
}

@keyframes filterSlideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.search-results-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 0.375rem;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.results-count {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.results-count.filtered {
  color: var(--accent-color);
  font-weight: 600;
}

.reset-filters-btn {
  padding: 0.5rem 1rem;
  background-color: var(--text-muted);
  color: white;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
}

.reset-filters-btn:hover {
  background-color: var(--text-secondary);
}

/* Search Autocomplete */
.search-autocomplete {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 0.375rem 0.375rem;
  max-height: 200px;
  overflow-y: auto;
  z-index: 100;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.autocomplete-item {
  padding: 0.75rem 1rem;
  cursor: pointer;
  border-bottom: 1px solid var(--border-light);
  transition: background-color 0.2s ease;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.autocomplete-item:hover,
.autocomplete-item.selected {
  background-color: var(--bg-secondary);
}

.autocomplete-item:last-child {
  border-bottom: none;
}

.question-number-highlight {
  font-weight: 600;
  color: var(--accent-color);
}

/* Mobile responsiveness for search */
@media (max-width: 768px) {
  .search-content {
    padding: 1rem;
  }

  .search-input-group {
    flex-direction: column;
    align-items: stretch;
  }

  .search-input {
    min-width: unset;
    width: 100%;
  }

  .search-btn,
  .clear-search-btn {
    width: 100%;
    justify-content: center;
  }

  .filter-options {
    flex-direction: column;
    gap: 0.75rem;
  }

  .search-results-info {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    gap: 0.75rem;
  }

  .reset-filters-btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .search-header {
    padding: 0.75rem 1rem;
  }

  .search-header h3 {
    font-size: 1rem;
  }

  .search-content {
    padding: 0.75rem;
  }

  .search-controls {
    gap: 1rem;
  }

  .search-filters {
    padding: 0.75rem;
  }

  .filter-checkbox {
    font-size: 0.875rem;
  }

  .results-count {
    font-size: 0.875rem;
  }
}

/* ===========================================
   ENHANCED NAVIGATION STYLES
   =========================================== */

/* Enhanced Navigation Controls with Neumorphism */
.nav-controls-enhanced {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0.75rem 0;
  padding: 0.75rem;
  background: var(--bg-primary);
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--neu-shadow-light), var(--neu-shadow-dark);
  transition: all var(--transition-smooth);
  position: relative;
}

.nav-controls-enhanced:hover {
  transform: var(--hover-scale);
  box-shadow: var(--neu-shadow-light), var(--neu-shadow-dark),
    0 4px 15px rgba(0, 0, 0, 0.1);
}

.nav-history {
  display: flex;
  gap: 0.5rem;
}

.nav-quick-actions {
  display: flex;
  gap: 0.5rem;
}

.nav-btn.history {
  background-color: var(--text-muted);
  color: white;
  border-color: var(--text-muted);
  transition: all 0.2s ease;
}

.nav-btn.history:hover:not(:disabled) {
  background-color: var(--text-secondary);
  transform: translateY(-1px);
}

.nav-btn.history:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Progress Sidebar with Glassmorphism */
.progress-sidebar {
  position: fixed;
  top: 0;
  right: -400px;
  width: 380px;
  height: 100vh;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border-left: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), -4px 0 15px rgba(0, 0, 0, 0.1);
  z-index: 1001;
  transition: right var(--transition-smooth),
    backdrop-filter var(--transition-normal);
  display: flex;
  flex-direction: column;
}

/* Glassmorphism fallback for progress-sidebar */
@supports not (backdrop-filter: blur(20px)) {
  .progress-sidebar {
    background-color: var(--bg-primary);
    border-left: 1px solid var(--border-color);
    box-shadow: -4px 0 15px rgba(0, 0, 0, 0.1);
  }
}

.progress-sidebar.open {
  right: 0;
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  flex-shrink: 0;
}

.sidebar-header h3 {
  margin: 0;
  color: var(--text-primary);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.close-sidebar-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.25rem;
  transition: all 0.2s ease;
}

.close-sidebar-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
}

.sidebar-content::-webkit-scrollbar {
  width: 6px;
}

.sidebar-content::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: 3px;
}

.sidebar-content::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

.sidebar-content::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Progress Overview */
.progress-overview {
  margin-bottom: 2rem;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-radius: 0.5rem;
  border: 1px solid var(--border-light);
}

.progress-stats {
  text-align: center;
  margin-bottom: 1rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.progress-bar-container {
  position: relative;
}

.progress-bar {
  width: 100%;
  height: 12px;
  background-color: var(--bg-tertiary);
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--success-color) 0%,
    var(--accent-color) 100%
  );
  transition: width 0.3s ease;
  border-radius: 6px 0 0 6px;
}

/* Enhanced Main Progress Indicator */
.main-progress-section {
  margin: 1.5rem 0 2rem 0;
  padding: 1.25rem;
  background-color: var(--bg-secondary);
  border-radius: 0.75rem;
  border: 1px solid var(--border-light);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: all 0.6s ease, transform 0.4s ease, border-color 0.6s ease,
    border-width 0.6s ease, box-shadow 0.6s ease;
  opacity: 0;
  transform: translateY(-10px);
  animation: slideInFromTop 0.6s ease-out forwards;
}

@keyframes slideInFromTop {
  0% {
    opacity: 0;
    transform: translateY(-20px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

[data-theme="dark"] .main-progress-section {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.main-progress-container {
  max-width: 100%;
  margin: 0 auto;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.progress-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.progress-text {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.progress-percentage {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-color);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  animation: percentagePulse 2s ease-in-out infinite;
}

@keyframes percentagePulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

.progress-stats {
  display: flex;
  gap: 1.25rem;
  align-items: center;
  flex-wrap: wrap;
}

.progress-stats .stat {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.25rem 0.5rem;
  border-radius: 0.375rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  transition: all 0.3s ease, transform 0.2s ease;
  cursor: default;
}

.progress-stats .stat:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.progress-stats .stat span {
  transition: all 0.3s ease;
}

.progress-stats .stat.answered {
  color: var(--success-color);
  border-color: var(--success-color);
  background-color: rgba(40, 167, 69, 0.1);
}

.progress-stats .stat.favorites {
  color: var(--warning-color);
  border-color: var(--warning-color);
  background-color: rgba(255, 193, 7, 0.1);
}

.progress-stats .stat.remaining {
  color: var(--text-muted);
  border-color: var(--text-muted);
  background-color: rgba(108, 117, 125, 0.1);
}

.main-progress-bar-container {
  position: relative;
  height: 16px;
  background-color: var(--bg-tertiary);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.main-progress-bar {
  position: relative;
  height: 100%;
  width: 100%;
}

.progress-fill.main {
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--success-color) 0%,
    var(--success-color) 70%,
    var(--accent-color) 85%,
    var(--warning-color) 100%
  );
  transition: width 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  border-radius: 8px 0 0 8px;
  position: relative;
  box-shadow: 0 0 8px rgba(40, 167, 69, 0.3);
  animation: progressGlow 3s ease-in-out infinite;
}

@keyframes progressGlow {
  0%,
  100% {
    box-shadow: 0 0 8px rgba(40, 167, 69, 0.3);
  }
  50% {
    box-shadow: 0 0 15px rgba(40, 167, 69, 0.5), 0 0 25px rgba(40, 167, 69, 0.2);
  }
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .main-progress-section {
    margin: 1rem 0 1.5rem 0;
    padding: 1rem;
  }

  .progress-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .progress-info {
    width: 100%;
    justify-content: space-between;
  }

  .progress-stats {
    gap: 0.75rem;
    width: 100%;
    justify-content: space-around;
  }

  .progress-stats .stat {
    font-size: 0.85rem;
    padding: 0.2rem 0.4rem;
  }

  .main-progress-bar-container {
    height: 14px;
  }

  .progress-text {
    font-size: 1rem;
  }

  .progress-percentage {
    font-size: 1.1rem;
  }
}

@media (max-width: 480px) {
  .progress-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .progress-stats .stat {
    width: 100%;
    justify-content: space-between;
  }

  .main-progress-bar-container {
    height: 12px;
  }
}

/* Milestone Effects */
.progress-fill.main.milestone-25 {
  background: linear-gradient(
    90deg,
    var(--success-color) 0%,
    var(--success-color) 100%
  );
}

.progress-fill.main.milestone-50 {
  background: linear-gradient(
    90deg,
    var(--success-color) 0%,
    var(--success-color) 70%,
    var(--accent-color) 100%
  );
}

.progress-fill.main.milestone-75 {
  background: linear-gradient(
    90deg,
    var(--success-color) 0%,
    var(--success-color) 50%,
    var(--accent-color) 80%,
    var(--warning-color) 100%
  );
}

.progress-fill.main.milestone-100 {
  background: linear-gradient(
    90deg,
    var(--success-color) 0%,
    var(--success-color) 40%,
    var(--accent-color) 70%,
    var(--warning-color) 85%,
    #ffd700 100%
  );
  animation: progressGlow 1.5s ease-in-out infinite,
    completionPulse 1.2s ease-in-out;
}

@keyframes completionPulse {
  0% {
    transform: scaleY(1);
  }
  50% {
    transform: scaleY(1.05);
  }
  100% {
    transform: scaleY(1);
  }
}

.progress-percentage.milestone-reached {
  color: #ffd700;
  animation: percentagePulse 1s ease-in-out infinite,
    milestoneGlow 0.8s ease-in-out;
}

@keyframes milestoneGlow {
  0% {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  }
  50% {
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.8),
      0 0 20px rgba(255, 215, 0, 0.4);
  }
  100% {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  }
}

.main-progress-section.milestone-25 {
  border-color: var(--success-color) !important;
  border-width: 3px !important;
  box-shadow: 0 0 20px rgba(40, 167, 69, 0.5) !important;
}

.main-progress-section.milestone-50 {
  border-color: var(--accent-color) !important;
  border-width: 3px !important;
  box-shadow: 0 0 20px rgba(255, 75, 75, 0.5) !important;
}

.main-progress-section.milestone-75 {
  border-color: var(--warning-color) !important;
  border-width: 3px !important;
  box-shadow: 0 0 20px rgba(255, 193, 7, 0.5) !important;
}

.main-progress-section.milestone-completion {
  border-color: #ffd700 !important;
  border-width: 4px !important;
  box-shadow: 0 0 30px rgba(255, 215, 0, 0.6) !important;
}

@keyframes milestoneGlow25 {
  0%,
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  50% {
    opacity: 1;
    transform: translateY(0) scale(1.02);
  }
}

@keyframes milestoneGlow50 {
  0%,
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  50% {
    opacity: 1;
    transform: translateY(0) scale(1.02);
  }
}

@keyframes milestoneGlow75 {
  0%,
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  50% {
    opacity: 1;
    transform: translateY(0) scale(1.02);
  }
}

@keyframes milestoneCelebration {
  0%,
  100% {
    transform: scale(1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border-width: 1px;
  }
  25% {
    transform: scale(1.03);
    box-shadow: 0 8px 20px rgba(40, 167, 69, 0.4);
    border-width: 3px;
  }
  50% {
    transform: scale(1.02);
    box-shadow: 0 10px 25px rgba(255, 75, 75, 0.4);
    border-width: 2px;
  }
  75% {
    transform: scale(1.03);
    box-shadow: 0 8px 20px rgba(255, 193, 7, 0.4);
    border-width: 3px;
  }
}

@keyframes milestoneGlowCompletion {
  0%,
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  25% {
    opacity: 1;
    transform: translateY(0) scale(1.03);
  }
  50% {
    opacity: 1;
    transform: translateY(0) scale(1.01);
  }
  75% {
    opacity: 1;
    transform: translateY(0) scale(1.03);
  }
}

@keyframes completionCelebration {
  0%,
  100% {
    transform: scale(1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  }
  25% {
    transform: scale(1.02);
    box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3);
  }
  50% {
    transform: scale(1.01);
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.3);
  }
  75% {
    transform: scale(1.02);
    box-shadow: 0 4px 16px rgba(255, 75, 75, 0.3);
  }
}

[data-theme="dark"] .main-progress-section.milestone-completion {
  border-color: #ffd700 !important;
  border-width: 4px !important;
  box-shadow: 0 0 30px rgba(255, 215, 0, 0.8) !important;
}

@keyframes milestoneGlowCompletionDark {
  0%,
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  25% {
    opacity: 1;
    transform: translateY(0) scale(1.03);
  }
  50% {
    opacity: 1;
    transform: translateY(0) scale(1.01);
  }
  75% {
    opacity: 1;
    transform: translateY(0) scale(1.03);
  }
}

@keyframes completionCelebrationDark {
  0%,
  100% {
    transform: scale(1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  }
  25% {
    transform: scale(1.02);
    box-shadow: 0 4px 16px rgba(255, 215, 0, 0.4);
  }
  50% {
    transform: scale(1.01);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
  }
  75% {
    transform: scale(1.02);
    box-shadow: 0 4px 16px rgba(255, 107, 107, 0.4);
  }
}

/* Progress Legend */
.progress-legend {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-radius: 0.375rem;
  border: 1px solid var(--border-light);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.current-icon {
  color: var(--accent-color);
}

.answered-icon {
  color: var(--success-color);
}

.preview-icon {
  color: #f39c12;
}

.unanswered-icon {
  color: var(--text-muted);
}

.favorite-icon {
  color: var(--warning-color);
}

/* Question List */
.question-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.question-item {
  padding: 0.75rem;
  background-color: var(--bg-secondary);
  border: 2px solid var(--border-light);
  border-radius: 0.375rem;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}

.question-item:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--text-muted);
  transform: translateY(-1px);
}

.question-item.current {
  background-color: rgba(255, 75, 75, 0.1);
  border-color: var(--accent-color);
  box-shadow: 0 2px 8px rgba(255, 75, 75, 0.2);
}

.question-item.answered {
  border-left: 4px solid var(--success-color);
}

.question-item.unanswered {
  border-left: 4px solid var(--text-muted);
}

.question-item.preview {
  border-left: 4px solid #f39c12;
}

.question-item.correct {
  border-left: 4px solid var(--success-color);
}

.question-item.incorrect {
  border-left: 4px solid var(--error-color);
}

.question-item.viewed {
  border-left: 4px solid var(--warning-color);
}

.question-item.new {
  border-left: 4px solid var(--text-muted);
}

.question-item.loading {
  border-left: 4px solid var(--warning-color);
  opacity: 0.7;
  cursor: not-allowed;
}

.question-item.loading:hover {
  background-color: var(--bg-secondary);
  transform: none;
}

.question-number {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.question-number i {
  font-size: 0.9rem;
  width: 16px;
}

.question-number .favorite-icon {
  margin-left: auto;
  font-size: 0.8rem;
}

.question-preview {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Sidebar Overlay */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Keyboard Help Modal Styles */
.keyboard-help-content {
  max-height: 70vh;
  overflow-y: auto;
}

.help-section {
  margin-bottom: 2rem;
}

.help-section h3 {
  color: var(--text-primary);
  font-size: 1.1rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 0.5rem;
}

.shortcut-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
}

.shortcut-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background-color: var(--bg-secondary);
  border-radius: 0.375rem;
  border: 1px solid var(--border-light);
}

.shortcut-item kbd {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.8rem;
  font-family: monospace;
  color: var(--text-primary);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  min-width: 24px;
  text-align: center;
}

.shortcut-item span {
  color: var(--text-secondary);
  font-size: 0.9rem;
  flex: 1;
}

/* Mobile Responsiveness for Enhanced Navigation */
@media (max-width: 768px) {
  .nav-controls-enhanced {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-history,
  .nav-quick-actions {
    width: 100%;
    justify-content: center;
  }

  .progress-sidebar {
    width: 100%;
    right: -100%;
  }

  .progress-sidebar.open {
    right: 0;
  }

  .sidebar-content {
    padding: 1rem;
  }

  .progress-legend {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .shortcut-grid {
    grid-template-columns: 1fr;
  }

  .shortcut-item {
    padding: 0.5rem;
  }

  .help-section {
    margin-bottom: 1.5rem;
  }

  .keyboard-help-content {
    max-height: 60vh;
  }
}

@media (max-width: 480px) {
  .nav-controls-enhanced {
    padding: 0.5rem;
  }

  .nav-btn.history,
  .nav-btn.secondary {
    padding: 0.5rem;
    font-size: 0.875rem;
  }

  .sidebar-header {
    padding: 1rem;
  }

  .sidebar-header h3 {
    font-size: 1rem;
  }

  .progress-overview {
    padding: 0.75rem;
    margin-bottom: 1.5rem;
  }

  .progress-legend {
    padding: 0.75rem;
  }

  .question-item {
    padding: 0.5rem;
  }

  .question-number {
    font-size: 0.9rem;
  }

  .question-preview {
    font-size: 0.8rem;
  }

  .shortcut-item {
    padding: 0.5rem;
    gap: 0.5rem;
  }

  .shortcut-item kbd {
    padding: 0.125rem 0.25rem;
    font-size: 0.7rem;
    min-width: 20px;
  }

  .shortcut-item span {
    font-size: 0.8rem;
  }
}

/* Dark mode adjustments for enhanced navigation */
[data-theme="dark"] .progress-sidebar {
  box-shadow: -4px 0 15px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .question-item.current {
  background-color: rgba(255, 107, 107, 0.15);
  box-shadow: 0 2px 8px rgba(255, 107, 107, 0.3);
}

[data-theme="dark"] .sidebar-overlay {
  background-color: rgba(0, 0, 0, 0.7);
}

[data-theme="dark"] .shortcut-item kbd {
  box-shadow: 0 1px 2px rgba(255, 255, 255, 0.1);
}

/* Mobile responsiveness for status badges */
@media (max-width: 768px) {
  .status-badge {
    font-size: 0.65rem;
    padding: 0.15rem 0.3rem;
    margin-left: 0.2rem;
  }

  .status-badge i {
    font-size: 0.55rem;
  }

  .question-status-indicators {
    gap: 0.2rem;
    margin-top: 0.2rem;
  }

  .secondary-badges {
    gap: 0.2rem;
  }
}

@media (max-width: 480px) {
  .status-badge {
    font-size: 0.6rem;
    padding: 0.1rem 0.25rem;
  }

  .question-status-indicators {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.15rem;
  }

  .primary-status,
  .secondary-badges {
    width: 100%;
  }

  .secondary-badges {
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 0.15rem;
  }
}

/* Mobile responsiveness for changelog */
@media (max-width: 768px) {
  .changelog-modal-content {
    width: 95vw;
    max-height: 85vh;
  }

  .changelog-content {
    max-height: 60vh;
    padding: 0.5rem 0;
  }

  .markdown-content h1 {
    font-size: 1.5rem;
  }

  .markdown-content h2 {
    font-size: 1.25rem;
  }

  .markdown-content h3 {
    font-size: 1.1rem;
  }

  .markdown-content pre {
    padding: 0.75rem;
    font-size: 0.8rem;
  }

  .markdown-content table {
    font-size: 0.9rem;
  }

  .markdown-content th,
  .markdown-content td {
    padding: 0.25rem 0.5rem;
  }
}

/* ============================
   TOOLTIPS SYSTEM
   ============================ */

/* Base tooltip styles - only active when enabled */
.tooltips-enabled [data-tooltip] {
  position: relative !important;
}

/* Tooltip content */
.tooltips-enabled [data-tooltip]:hover::before,
.tooltips-enabled [data-tooltip]:focus::before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  line-height: 1.5;
  white-space: pre-wrap;
  z-index: 99999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease-in-out, transform 0.2s ease-in-out;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  max-width: 350px;
  min-width: 200px;
  width: max-content;
  word-wrap: break-word;
}

/* Tooltip arrow */
.tooltips-enabled [data-tooltip]:hover::after,
.tooltips-enabled [data-tooltip]:focus::after {
  content: "";
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(1px);
  border: 5px solid transparent;
  border-top-color: var(--text-primary);
  z-index: 9998;
  opacity: 0;
  transition: opacity 0.2s ease-in-out;
}

/* Show tooltip on hover/focus */
.tooltips-enabled [data-tooltip]:hover::before,
.tooltips-enabled [data-tooltip]:hover::after,
.tooltips-enabled [data-tooltip]:focus::before,
.tooltips-enabled [data-tooltip]:focus::after {
  opacity: 1;
  transform: translateX(-50%) translateY(-5px);
}

.tooltips-enabled [data-tooltip]:hover::after,
.tooltips-enabled [data-tooltip]:focus::after {
  transform: translateX(-50%) translateY(-4px);
}

/* Tooltip positioning variants */
.tooltips-enabled [data-tooltip-position="top"]::before {
  bottom: 100%;
  top: auto;
}

.tooltips-enabled [data-tooltip-position="bottom"]::before {
  top: calc(100% + 5px);
  bottom: auto;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  line-height: 1.5;
  white-space: pre-wrap;
  z-index: 99999;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  max-width: 350px;
  min-width: 200px;
  width: max-content;
  word-wrap: break-word;
}

.tooltips-enabled [data-tooltip-position="bottom"]:hover::before,
.tooltips-enabled [data-tooltip-position="bottom"]:focus::before {
  transform: translateX(-50%) translateY(10px);
}

.tooltips-enabled [data-tooltip-position="bottom"]::after {
  top: 100%;
  bottom: auto;
  border-top-color: transparent;
  border-bottom-color: var(--text-primary);
  transform: translateX(-50%) translateY(-1px);
}

.tooltips-enabled [data-tooltip-position="bottom"]:hover::after,
.tooltips-enabled [data-tooltip-position="bottom"]:focus::after {
  transform: translateX(-50%) translateY(8px);
}

.tooltips-enabled [data-tooltip-position="left"]::before {
  top: 50%;
  bottom: auto;
  left: auto;
  right: 100%;
  transform: translateY(-50%);
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  line-height: 1.5;
  white-space: pre-wrap;
  z-index: 99999;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  max-width: 350px;
  min-width: 200px;
  width: max-content;
  word-wrap: break-word;
}

.tooltips-enabled [data-tooltip-position="left"]:hover::before,
.tooltips-enabled [data-tooltip-position="left"]:focus::before {
  transform: translateY(-50%) translateX(-5px);
}

.tooltips-enabled [data-tooltip-position="left"]::after {
  top: 50%;
  bottom: auto;
  left: auto;
  right: 100%;
  border-top-color: transparent;
  border-left-color: var(--text-primary);
  transform: translateY(-50%) translateX(1px);
}

.tooltips-enabled [data-tooltip-position="left"]:hover::after,
.tooltips-enabled [data-tooltip-position="left"]:focus::after {
  transform: translateY(-50%) translateX(-4px);
}

.tooltips-enabled [data-tooltip-position="right"]::before {
  top: 50%;
  bottom: auto;
  right: auto;
  left: 100%;
  transform: translateY(-50%);
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  line-height: 1.5;
  white-space: pre-wrap;
  z-index: 99999;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  max-width: 350px;
  min-width: 200px;
  width: max-content;
  word-wrap: break-word;
}

.tooltips-enabled [data-tooltip-position="right"]:hover::before,
.tooltips-enabled [data-tooltip-position="right"]:focus::before {
  transform: translateY(-50%) translateX(5px);
}

.tooltips-enabled [data-tooltip-position="right"]::after {
  top: 50%;
  bottom: auto;
  right: auto;
  left: 100%;
  border-top-color: transparent;
  border-right-color: var(--text-primary);
  transform: translateY(-50%) translateX(-1px);
}

.tooltips-enabled [data-tooltip-position="right"]:hover::after,
.tooltips-enabled [data-tooltip-position="right"]:focus::after {
  transform: translateY(-50%) translateX(4px);
}

/* Mobile adaptations */
@media (max-width: 768px) {
  /* Disable hover-based tooltips on mobile, use touch events instead */
  .tooltips-enabled [data-tooltip]:hover::before,
  .tooltips-enabled [data-tooltip]:hover::after {
    opacity: 0;
  }

  /* Make tooltips larger on mobile */
  .tooltips-enabled [data-tooltip]:focus::before {
    font-size: 1rem;
    padding: 1rem 1.25rem;
    max-width: 300px;
    min-width: 250px;
  }

  /* Adjust tooltip positioning for mobile */
  .tooltips-enabled [data-tooltip]:focus::before {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    bottom: auto;
    background: var(--text-primary);
    border-radius: 0.5rem;
    z-index: 10000;
  }

  .tooltips-enabled [data-tooltip]:focus::after {
    display: none; /* Hide arrow on mobile */
  }
}

/* ============================
   MODERN ANIMATIONS & MICRO-INTERACTIONS
   ============================ */

/* Skeleton Loading Animations */
@keyframes skeletonPulse {
  0% {
    background-position: -200px 0;
  }
  100% {
    background-position: calc(200px + 100%) 0;
  }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-secondary) 25%,
    var(--bg-tertiary) 50%,
    var(--bg-secondary) 75%
  );
  background-size: 200px 100%;
  animation: skeletonPulse 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 1rem;
  margin-bottom: 0.5rem;
}

.skeleton-title {
  height: 1.5rem;
  margin-bottom: 1rem;
  width: 60%;
}

.skeleton-paragraph {
  height: 0.875rem;
  margin-bottom: 0.75rem;
}

.skeleton-paragraph:nth-child(odd) {
  width: 90%;
}

.skeleton-paragraph:nth-child(even) {
  width: 75%;
}

/* Ripple Effect Animation */
.ripple {
  position: relative;
  overflow: hidden;
}

.ripple::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.ripple:active::before {
  width: 300px;
  height: 300px;
}

/* Sophisticated Hover States */
.sophisticated-hover {
  position: relative;
  transition: all var(--transition-smooth);
  overflow: hidden;
}

.sophisticated-hover::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s ease;
}

.sophisticated-hover:hover::before {
  left: 100%;
}

.sophisticated-hover:hover {
  transform: var(--hover-lift);
  box-shadow: var(--shadow-xl);
}

/* Enhanced Focus States */
.enhanced-focus:focus-visible {
  outline: none;
  box-shadow: var(--focus-glow);
  transform: scale(1.02);
  transition: all var(--transition-fast);
}

/* Loading Dots */
@keyframes loadingDots {
  0%,
  20% {
    opacity: 0;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.2);
  }
  100% {
    opacity: 0;
    transform: scale(1);
  }
}

.loading-dots {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.loading-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-color);
  animation: loadingDots 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(1) {
  animation-delay: 0s;
}
.loading-dots span:nth-child(2) {
  animation-delay: 0.2s;
}
.loading-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

/* Slide In Animations */
@keyframes slideInFromLeft {
  0% {
    transform: translateX(-100%);
    opacity: 0;
  }
  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideInFromRight {
  0% {
    transform: translateX(100%);
    opacity: 0;
  }
  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideInFromTop {
  0% {
    transform: translateY(-100%);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes slideInFromBottom {
  0% {
    transform: translateY(100%);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

.slide-in-left {
  animation: slideInFromLeft var(--transition-smooth) ease-out;
}

.slide-in-right {
  animation: slideInFromRight var(--transition-smooth) ease-out;
}

.slide-in-top {
  animation: slideInFromTop var(--transition-smooth) ease-out;
}

.slide-in-bottom {
  animation: slideInFromBottom var(--transition-smooth) ease-out;
}

/* Stagger Animation */
.stagger-animation > * {
  opacity: 0;
  transform: translateY(20px);
  animation: staggerIn var(--transition-smooth) ease-out forwards;
}

.stagger-animation > *:nth-child(1) {
  animation-delay: 0.1s;
}
.stagger-animation > *:nth-child(2) {
  animation-delay: 0.2s;
}
.stagger-animation > *:nth-child(3) {
  animation-delay: 0.3s;
}
.stagger-animation > *:nth-child(4) {
  animation-delay: 0.4s;
}
.stagger-animation > *:nth-child(5) {
  animation-delay: 0.5s;
}
.stagger-animation > *:nth-child(n + 6) {
  animation-delay: 0.6s;
}

@keyframes staggerIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Pulse Animation */
@keyframes pulse {
  0% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(155, 135, 245, 0.7);
  }
  70% {
    transform: scale(1.05);
    box-shadow: 0 0 0 10px rgba(155, 135, 245, 0);
  }
  100% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(155, 135, 245, 0);
  }
}

.pulse-animation {
  animation: pulse 2s infinite;
}

/* Bounce Entrance */
@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3) translateY(-2000px);
  }
  60% {
    opacity: 1;
    transform: scale(1.03) translateY(25px);
  }
  75% {
    transform: scale(0.9) translateY(-10px);
  }
  90% {
    transform: scale(1.02) translateY(5px);
  }
  100% {
    transform: scale(1) translateY(0);
  }
}

.bounce-in {
  animation: bounceIn var(--transition-bounce) ease-out;
}

/* Enhanced Animation Support with Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .skeleton {
    animation: none;
    background: var(--bg-secondary);
  }

  .pulse-animation,
  .bounce-in,
  .slide-in-left,
  .slide-in-right,
  .slide-in-top,
  .slide-in-bottom,
  .stagger-animation > * {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }

  .sophisticated-hover::before {
    display: none;
  }

  .ripple::before {
    display: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .tooltips-enabled [data-tooltip]:hover::before,
  .tooltips-enabled [data-tooltip]:focus::before {
    border: 2px solid var(--border-color);
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .tooltips-enabled [data-tooltip]:hover::before,
  .tooltips-enabled [data-tooltip]:hover::after,
  .tooltips-enabled [data-tooltip]:focus::before,
  .tooltips-enabled [data-tooltip]:focus::after {
    transition: none;
  }
}

/* Hide mobile navigation on desktop */
.mobile-nav-bottom {
  display: none;
}

/* Hide swipe indicators on desktop */
.swipe-indicator {
  display: none;
}

/* iOS Safe Area Support */
:root {
  --safe-area-inset-top: env(safe-area-inset-top);
  --safe-area-inset-right: env(safe-area-inset-right);
  --safe-area-inset-bottom: env(safe-area-inset-bottom);
  --safe-area-inset-left: env(safe-area-inset-left);
}

/* CSS Scroll Snap for smooth navigation */
.question-section {
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  overscroll-behavior-x: contain;
}

.question-content {
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

/* Enhanced Mobile Navigation Styles */
@media (max-width: 480px) {
  /* Hide entire navigation section on mobile */
  .navigation-section {
    display: none !important;
  }

  /* Mobile bottom navigation with safe area support */
  .mobile-nav-bottom {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 0.5rem;
    padding-bottom: calc(0.5rem + var(--safe-area-inset-bottom));
    padding-left: calc(0.5rem + var(--safe-area-inset-left));
    padding-right: calc(0.5rem + var(--safe-area-inset-right));
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 1000;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .mobile-nav-bottom .nav-btn {
    flex: 1;
    max-width: 80px;
    margin: 0 0.25rem;
    padding: 0.5rem;
    font-size: 0.8rem;
    min-height: 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
  }

  .mobile-nav-bottom .nav-btn i {
    font-size: 1.2rem;
  }

  /* Add bottom padding to prevent content overlap with mobile nav */
  .question-section {
    padding-bottom: calc(80px + var(--safe-area-inset-bottom));
  }

  /* Enhanced thumb-friendly zones */
  .mobile-nav-bottom .nav-btn {
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
  }

  .mobile-nav-bottom .nav-btn:active {
    transform: scale(0.95);
    background: var(--accent-color);
    color: white;
  }

  /* Thumb-friendly touch zones - easier reach areas */
  .mobile-nav-bottom .nav-btn:first-child,
  .mobile-nav-bottom .nav-btn:last-child {
    margin: 0 0.5rem; /* More space on edges for easier thumb access */
  }

  /* Enhanced touch targets for navigation buttons */
  .nav-btn {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }

  /* Enhanced touch targets for answer options */
  .answer-option {
    padding: 0.75rem;
    font-size: 0.9rem;
    min-height: 44px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }

  .answer-option input[type="checkbox"] {
    width: 20px;
    height: 20px;
    min-width: 20px;
    min-height: 20px;
  }

  /* Enhanced touch targets for inputs */
  .exam-input,
  .question-jump input {
    min-height: 44px;
    font-size: 0.9rem;
    padding: 0.75rem;
    touch-action: manipulation;
  }

  /* Enhanced touch targets for buttons */
  .exam-load-btn,
  .favorites-actions button,
  .export-actions button {
    min-height: 44px;
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }

  /* Enhanced swipe gesture indicator with modern design */
  .swipe-indicator {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    background: var(--accent-color);
    color: white;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    font-weight: 600;
    z-index: 1001;
    opacity: 0;
    transition: all var(--transition-fast);
    pointer-events: none;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: block; /* Override the default display: none */
    border: 1px solid rgba(255, 255, 255, 0.2);
  }

  .swipe-indicator.left {
    left: 20px;
  }

  .swipe-indicator.right {
    right: 20px;
  }

  .swipe-indicator.show {
    opacity: 1;
    transform: translateY(-50%) scale(1.05);
  }

  /* Enhanced touch feedback for interactive elements */
  .touch-feedback {
    position: relative;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
  }

  .touch-feedback::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(
      circle,
      rgba(255, 255, 255, 0.4) 0%,
      rgba(255, 255, 255, 0.1) 70%
    );
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width var(--transition-fast), height var(--transition-fast);
    pointer-events: none;
    z-index: 1;
  }

  .touch-feedback:active::before {
    width: 120px;
    height: 120px;
    transition: width 0.1s ease, height 0.1s ease;
  }

  /* Pull-to-refresh indicator */
  .pull-to-refresh {
    position: fixed;
    top: calc(var(--safe-area-inset-top) + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(-100%);
    background: var(--accent-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-xl);
    font-size: 0.8rem;
    font-weight: 600;
    z-index: 1002;
    opacity: 0;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .pull-to-refresh.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }

  .pull-to-refresh.active {
    background: var(--success-color);
  }

  /* Enhanced spacing for mobile */
  .nav-controls {
    gap: 0.75rem;
  }

  .nav-controls-secondary {
    gap: 0.75rem;
  }

  .favorites-actions {
    gap: 0.75rem;
  }

  .export-actions {
    gap: 0.75rem;
  }

  /* Advanced gesture support */
  .pinch-zoom-container {
    touch-action: manipulation;
    overflow: hidden;
    position: relative;
  }

  .pinch-zoom-content {
    transition: transform var(--transition-normal);
    transform-origin: center;
  }

  .pinch-zoom-content.zoomed {
    touch-action: pan-x pan-y;
  }

  /* Long press context menu */
  .long-press-menu {
    position: fixed;
    background: var(--bg-surface);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 0.5rem;
    z-index: 1003;
    opacity: 0;
    transform: scale(0.8);
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .long-press-menu.show {
    opacity: 1;
    transform: scale(1);
  }

  .long-press-menu button {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    border: none;
    background: none;
    text-align: left;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
    min-height: 44px;
    font-size: 0.9rem;
  }

  .long-press-menu button:hover,
  .long-press-menu button:focus {
    background: var(--bg-tertiary);
  }

  /* Better visual hierarchy for mobile */
  .question-info {
    font-size: 0.9rem;
    padding: 0.75rem;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* Extra small mobile devices (360px and below) */
@media (max-width: 360px) {
  .mobile-nav-bottom .nav-btn {
    font-size: 0.7rem;
    padding: 0.5rem 0.25rem;
  }

  .mobile-nav-bottom .nav-btn i {
    font-size: 1rem;
  }

  .swipe-indicator {
    font-size: 0.8rem;
    padding: 0.5rem 0.75rem;
  }

  .long-press-menu {
    min-width: 150px;
  }
}

/* Large mobile devices and small tablets (481px to 768px) */
@media (min-width: 481px) and (max-width: 768px) {
  .mobile-nav-bottom {
    display: none; /* Hide mobile nav on tablets */
  }

  .navigation-section {
    display: block !important; /* Show desktop nav on tablets */
  }

  .question-section {
    padding-bottom: 0; /* Remove mobile nav padding on tablets */
  }
}

/* Landscape orientation optimizations */
@media (max-width: 480px) and (orientation: landscape) {
  .mobile-nav-bottom {
    padding: 0.25rem;
    padding-bottom: calc(0.25rem + var(--safe-area-inset-bottom));
  }

  .mobile-nav-bottom .nav-btn {
    min-height: 40px;
    padding: 0.25rem;
  }

  .mobile-nav-bottom .nav-btn span {
    display: none; /* Hide text labels in landscape */
  }

  .question-section {
    padding-bottom: calc(60px + var(--safe-area-inset-bottom));
  }

  .question-jump {
    min-width: 140px;
  }

  .question-jump input {
    width: 80px;
    min-height: 44px;
    font-size: 0.9rem;
    text-align: center;
  }

  /* Mobile-optimized progress elements */
  .progress-stats-item,
  .current-session-stats-item,
  .exam-info-item {
    padding: 0.75rem;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .progress-bar {
    height: 8px;
  }

  .progress-fill {
    height: 100%;
  }

  /* Mobile-optimized sidebar */
  .sidebar {
    padding: 0.75rem;
  }

  .sidebar .nav-btn {
    width: 100%;
    justify-content: flex-start;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
  }

  /* Better modal experience on mobile */
  .modal-content {
    margin: 0.5rem;
    padding: 1rem;
    border-radius: 8px;
  }

  /* Enhanced mobile keyboard support */
  .keyboard-shortcut {
    padding: 0.5rem;
    min-height: 44px;
    display: flex;
    align-items: center;
  }
}

/* ===========================
   ENHANCED OVERVIEW STATISTICS par
   =========================== */

/* Overview Summary Section */
.overview-summary {
  margin-bottom: 2rem;
}

.summary-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.summary-header h3 {
  margin: 0;
  color: var(--text-primary);
  font-size: 1.5rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.accuracy-badge {
  background: linear-gradient(135deg, #4caf50, #45a049);
  color: white;
  padding: 0.75rem 1.25rem;
  border-radius: 2rem;
  text-align: center;
  box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
  transition: all 0.3s ease;
}

.accuracy-badge.accuracy-high {
  background: linear-gradient(135deg, #4caf50, #45a049);
  box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
}

.accuracy-badge.accuracy-medium {
  background: linear-gradient(135deg, #ff9800, #f57c00);
  box-shadow: 0 2px 8px rgba(255, 152, 0, 0.3);
}

.accuracy-badge.accuracy-low {
  background: linear-gradient(135deg, #f44336, #d32f2f);
  box-shadow: 0 2px 8px rgba(244, 67, 54, 0.3);
}

.accuracy-badge:hover {
  transform: translateY(-2px);
}

.accuracy-badge.accuracy-high:hover {
  box-shadow: 0 4px 12px rgba(76, 175, 80, 0.4);
}

.accuracy-badge.accuracy-medium:hover {
  box-shadow: 0 4px 12px rgba(255, 152, 0, 0.4);
}

.accuracy-badge.accuracy-low:hover {
  box-shadow: 0 4px 12px rgba(244, 67, 54, 0.4);
}

.accuracy-badge span {
  font-size: 1.5rem;
  font-weight: 700;
  display: block;
  line-height: 1;
}

.accuracy-badge small {
  font-size: 0.75rem;
  opacity: 0.9;
  font-weight: 500;
}

/* Enhanced Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

/* Prevent horizontal scroll on very small screens */
@media (max-width: 320px) {
  .metrics-grid {
    grid-template-columns: 1fr;
  }
}

.metric-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.metric-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent-color);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.metric-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
  border-color: var(--accent-color);
}

.metric-card:hover::before {
  opacity: 1;
}

.metric-icon {
  width: 60px;
  height: 60px;
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.metric-icon::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: inherit;
  opacity: 0.1;
  border-radius: inherit;
}

.metric-card.primary .metric-icon {
  background: linear-gradient(135deg, #2196f3, #1976d2);
}

.metric-card.success .metric-icon {
  background: linear-gradient(135deg, #4caf50, #388e3c);
}

.metric-card.error .metric-icon {
  background: linear-gradient(135deg, #f44336, #d32f2f);
}

.metric-card.warning .metric-icon {
  background: linear-gradient(135deg, #ff9800, #f57c00);
}

.metric-card.info .metric-icon {
  background: linear-gradient(135deg, #00bcd4, #0097a7);
}

.metric-card.secondary .metric-icon {
  background: linear-gradient(135deg, #9c27b0, #7b1fa2);
}

.metric-content {
  flex: 1;
  min-width: 0;
}

.metric-value {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.metric-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.metric-trend {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  font-style: italic;
}

.metric-trend small {
  font-weight: 500;
}

/* Progress Visualization */
.progress-visualization {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.progress-visualization h4 {
  margin: 0 0 1.5rem 0;
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.progress-chart {
  width: 100%;
}

.progress-bar-container {
  width: 100%;
}

.progress-bar {
  width: 100%;
  height: 16px;
  background-color: var(--bg-tertiary);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  margin-bottom: 1rem;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.progress-segment {
  height: 100%;
  transition: width 0.8s ease;
  position: relative;
}

.progress-segment.correct {
  background: linear-gradient(90deg, #4caf50, #66bb6a);
}

.progress-segment.incorrect {
  background: linear-gradient(90deg, #f44336, #ef5350);
}

.progress-segment.preview {
  background: linear-gradient(90deg, #ff9800, #ffb74d);
}

.progress-labels {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.progress-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.color-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.progress-label.correct .color-dot {
  background: #4caf50;
}

.progress-label.incorrect .color-dot {
  background: #f44336;
}

.progress-label.preview .color-dot {
  background: #ff9800;
}

/* Dark Theme Adaptations */
[data-theme="dark"] .accuracy-badge {
  background: linear-gradient(135deg, #388e3c, #2e7d32);
  box-shadow: 0 2px 8px rgba(56, 142, 60, 0.4);
}

[data-theme="dark"] .accuracy-badge:hover {
  box-shadow: 0 4px 12px rgba(56, 142, 60, 0.5);
}

[data-theme="dark"] .metric-card:hover {
  box-shadow: 0 8px 25px rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .progress-bar {
  box-shadow: inset 0 2px 4px rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
  .metrics-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .metric-card {
    padding: 1.25rem;
    gap: 1rem;
  }

  .metric-icon {
    width: 50px;
    height: 50px;
    font-size: 1.25rem;
  }

  .metric-value {
    font-size: 1.75rem;
  }

  .summary-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .summary-header h3 {
    font-size: 1.25rem;
  }

  .accuracy-badge {
    align-self: stretch;
    text-align: center;
  }

  .progress-labels {
    flex-direction: column;
    gap: 0.75rem;
  }
}

@media (max-width: 480px) {
  .metrics-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .metric-card {
    padding: 1rem;
    border-radius: 0.75rem;
    gap: 0.75rem;
    min-width: 0;
    overflow: hidden;
  }

  .metric-icon {
    width: 44px;
    height: 44px;
    font-size: 1.125rem;
    border-radius: 0.75rem;
    flex-shrink: 0;
  }

  .metric-value {
    font-size: 1.5rem;
  }

  .metric-content {
    min-width: 0;
    overflow: hidden;
  }

  .progress-visualization {
    padding: 1.25rem;
  }
}

/* ===========================
   DEVELOPMENT TEST BUTTON
   =========================== */

.dev-test-button {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  opacity: 0.8;
  transition: var(--transition-normal);
}

.dev-test-button:hover {
  opacity: 1;
  transform: var(--hover-lift);
}

.btn-dev-test {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--text-sm);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: var(--transition-normal);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid rgba(255, 255, 255, 0.2);
  min-height: 44px;
  min-width: 44px;
}

.btn-dev-test:hover {
  transform: var(--hover-lift) var(--hover-scale);
  box-shadow: var(--shadow-xl);
  background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
}

.btn-dev-test:active {
  transform: var(--active-scale);
}

.btn-dev-test:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* ===========================
   KEYBOARD SHORTCUTS MODAL
   =========================== */

.keyboard-help-modal .modal-content {
  /* Inherit glassmorphism from parent but ensure proper styling */
  color: var(--text-primary);
}

.keyboard-help-content {
  /* Additional styles specific to keyboard help */
  scrollbar-width: thin;
  scrollbar-color: var(--border-light) transparent;
}

.keyboard-help-content::-webkit-scrollbar {
  width: 8px;
}

.keyboard-help-content::-webkit-scrollbar-track {
  background: transparent;
}

.keyboard-help-content::-webkit-scrollbar-thumb {
  background: var(--border-light);
  border-radius: var(--radius-sm);
}

.keyboard-help-content::-webkit-scrollbar-thumb:hover {
  background: var(--border-primary);
}

.keyboard-help-content .modal-header {
  background: var(--bg-accent);
  border-bottom: 1px solid var(--border-secondary);
  color: var(--text-primary);
}

.keyboard-help-content .modal-header h2 {
  color: var(--text-primary);
}

.keyboard-help-content .modal-body {
  color: var(--text-primary);
  background: transparent;
}

.keyboard-help-content .shortcut-section {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
}

.keyboard-help-content .shortcut-section h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  font-size: var(--text-lg);
  font-weight: 600;
}

.keyboard-help-content .shortcut-item {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-sm);
  gap: var(--space-sm);
}

.keyboard-help-content .shortcut-item span {
  color: var(--text-secondary);
}

.keyboard-help-content kbd {
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 0 var(--border-primary),
    0 1px 0 0 var(--border-secondary) inset;
  color: var(--text-primary);
  display: inline-block;
  font-family: var(
    --font-family-mono,
    "Monaco",
    "Menlo",
    "Ubuntu Mono",
    monospace
  );
  font-size: var(--text-xs);
  font-weight: 600;
  line-height: 1;
  padding: var(--space-xs) calc(var(--space-xs) * 1.5);
  white-space: nowrap;
  min-width: 1.5rem;
  text-align: center;
}

.keyboard-help-content .close-btn {
  background: none !important;
  border: none !important;
  color: var(--text-primary) !important;
  border-radius: var(--radius-full);
  transition: var(--transition-normal);
  padding: var(--space-xs) !important;
}

.keyboard-help-content .close-btn:hover {
  background: var(--bg-tertiary) !important;
  color: var(--text-primary) !important;
}

.keyboard-help-content .close-btn:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.btn-dev-test i {
  font-size: 1.1em;
}

[data-theme="dark"] .btn-dev-test {
  background: linear-gradient(135deg, #8b7bd8 0%, #a697e5 100%);
  color: var(--text-primary);
}

[data-theme="dark"] .btn-dev-test:hover {
  background: linear-gradient(135deg, #9c8ce0 0%, #b5a8eb 100%);
}

/* Mobile optimizations */
@media (max-width: 768px) {
  .dev-test-button {
    bottom: 80px; /* Above mobile navigation */
    right: 15px;
  }

  .btn-dev-test {
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--text-xs);
  }
}

/* ===========================================
   SETTINGS MODAL LIGHT MODE CONTRAST IMPROVEMENTS  
   =========================================== */

/* Enhanced settings modal styling - keep glassmorphism like other modals */
#settingsModal .modal-content {
  /* Use same glassmorphism as keyboard shortcuts modal */
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* Fallback for browsers that don't support backdrop-filter */
@supports not (backdrop-filter: blur(20px)) {
  #settingsModal .modal-content {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-xl);
  }
}

/* Improved toggle switches for light mode contrast */
#settingsModal .toggle-label {
  color: var(--text-primary);
  font-weight: 500;
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Enhanced toggle slider for better visibility */
#settingsModal .toggle-slider {
  width: 50px;
  height: 24px;
  background: #e5e7eb;
  border-radius: 12px;
  position: relative;
  transition: all var(--transition-smooth);
  border: 2px solid #d1d5db;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
  flex-shrink: 0; /* Prevent shrinking */
}

#settingsModal .toggle-slider:before {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #ffffff;
  top: 2px;
  left: 2px;
  transition: all var(--transition-smooth);
  border: 1px solid #d1d5db;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Active state with stronger accent color */
#settingsModal .toggle-label input[type="checkbox"]:checked + .toggle-slider {
  background-color: var(--accent-color);
  border-color: var(--accent-active);
  box-shadow: inset 0 2px 4px rgba(155, 135, 245, 0.3);
}

#settingsModal
  .toggle-label
  input[type="checkbox"]:checked
  + .toggle-slider:before {
  transform: translateX(26px);
  background: #ffffff;
  border-color: rgba(255, 255, 255, 0.8);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

/* Dark mode specific toggle styling */
[data-theme="dark"] #settingsModal .toggle-slider {
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  box-shadow: var(--neu-shadow-inset-light), var(--neu-shadow-inset-dark);
}

[data-theme="dark"] #settingsModal .toggle-slider:before {
  background: var(--bg-primary);
  border: none;
  box-shadow: var(--neu-shadow-light), var(--neu-shadow-dark);
}

[data-theme="dark"]
  #settingsModal
  .toggle-label
  input[type="checkbox"]:checked
  + .toggle-slider {
  background-color: var(--accent-color);
}

[data-theme="dark"]
  #settingsModal
  .toggle-label
  input[type="checkbox"]:checked
  + .toggle-slider:before {
  transform: translateX(26px);
}

/* Enhanced text contrast for settings descriptions */
#settingsModal .setting-description {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-top: 0.5rem;
  margin-bottom: 1rem;
  padding: 0.75rem 1rem;
  background: rgba(0, 0, 0, 0.05);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--accent-color);
}

[data-theme="dark"] #settingsModal .setting-description {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
}

/* Enhanced settings group headers */
#settingsModal .setting-group h3 {
  color: var(--text-primary);
  font-weight: 600;
  font-size: var(--text-lg);
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-secondary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

#settingsModal .setting-group h3 i {
  color: var(--accent-color);
  font-size: 1.1em;
}

/* Better spacing and visual hierarchy for settings groups */
#settingsModal .setting-group {
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: rgba(0, 0, 0, 0.02);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] #settingsModal .setting-group {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Enhanced button styling in settings modal for better visibility */
#settingsModal .settings-action-btn {
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0.025em;
  border: 1px solid transparent;
  transition: all var(--transition-normal);
  flex: 1; /* Allow buttons to expand equally */
  min-width: 120px; /* Minimum width for readability */
  font-size: 0.8rem; /* Smaller font to fit better */
  padding: 0.625rem 0.75rem; /* Adjust padding */
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#settingsModal .settings-action-btn:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transform: translateY(-2px);
}

/* Improved layout for favorites actions */
#settingsModal .favorites-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: stretch;
}

/* Responsive button layout */
@media (max-width: 768px) {
  #settingsModal .favorites-actions {
    flex-direction: column;
  }

  #settingsModal .settings-action-btn {
    flex: none;
    width: 100%;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  #settingsModal .settings-action-btn {
    font-size: 0.75rem;
    padding: 0.5rem 0.625rem;
    min-width: 110px;
  }
}

/* Very wide screens - larger buttons with more space */
@media (min-width: 1200px) {
  #settingsModal .settings-action-btn {
    font-size: 0.9rem;
    padding: 0.75rem 1rem;
    min-width: 140px;
  }

  #settingsModal .favorites-actions {
    gap: 1rem;
  }
}

/* Improved focus states for accessibility */
#settingsModal .toggle-label:focus-within {
  outline: 2px solid var(--accent-color);
  outline-offset: 4px;
  border-radius: var(--radius-md);
}

#settingsModal .toggle-slider:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 3px;
}

/* Enhanced modal header for settings */
#settingsModal .modal-header {
  background: linear-gradient(
    135deg,
    var(--bg-secondary) 0%,
    var(--bg-tertiary) 100%
  );
  border-bottom: 2px solid var(--border-secondary);
}

#settingsModal .modal-header h2 {
  color: var(--text-primary);
  font-weight: 600;
  font-size: var(--text-xl);
}

/* Responsive improvements for mobile */
@media (max-width: 768px) {
  #settingsModal .setting-group {
    padding: 1rem;
    margin-bottom: 1.5rem;
  }

  #settingsModal .toggle-label {
    font-size: var(--text-sm);
    margin-bottom: 1rem;
  }

  #settingsModal .setting-description {
    font-size: var(--text-xs);
    padding: 0.5rem 0.75rem;
  }

  #settingsModal .setting-group h3 {
    font-size: var(--text-base);
    margin-bottom: 1rem;
  }
}

/* Developer Info Section */
.developer-info {
  text-align: center;
  margin-bottom: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  background: linear-gradient(
    135deg,
    rgba(155, 135, 245, 0.05) 0%,
    rgba(164, 144, 128, 0.05) 100%
  );
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.developer-name {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.025em;
}

.developer-links {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

.developer-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  text-decoration: none;
  transition: all 0.3s ease;
  color: white;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.developer-link::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.2) 0%,
    rgba(255, 255, 255, 0.1) 100%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
}

.developer-link:hover::before {
  opacity: 1;
}

.developer-link:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.developer-link i {
  font-size: 1.1rem;
  position: relative;
  z-index: 1;
}

.github-link {
  background: linear-gradient(135deg, #333 0%, #24292e 100%);
}

.github-link:hover {
  background: linear-gradient(135deg, #24292e 0%, #1a1e22 100%);
}

.raycast-link {
  background: linear-gradient(135deg, #ff6363 0%, #e63946 100%);
}

.raycast-link:hover {
  background: linear-gradient(135deg, #e63946 0%, #d62828 100%);
}

.raycast-icon {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  position: relative;
  z-index: 1;
}

.bug-report-button {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
  color: white;
  text-decoration: none;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
  border: none;
  cursor: pointer;
}

.bug-report-button:hover {
  background: linear-gradient(135deg, #b91c1c 0%, #991b1b 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
  color: white;
}

.bug-report-button i {
  font-size: 0.875rem;
}

.bug-report-button span {
  white-space: nowrap;
}

/* Dark mode adjustments */
[data-theme="dark"] .developer-info {
  background: linear-gradient(
    135deg,
    rgba(155, 135, 245, 0.1) 0%,
    rgba(164, 144, 128, 0.1) 100%
  );
}

[data-theme="dark"] .developer-name {
  color: var(--text-primary);
}

[data-theme="dark"] .github-link {
  background: linear-gradient(135deg, #f0f6fc 0%, #e6edf3 100%);
  color: #24292e;
}

[data-theme="dark"] .github-link:hover {
  background: linear-gradient(135deg, #e6edf3 0%, #d0d7de 100%);
}

[data-theme="dark"] .bug-report-button {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

[data-theme="dark"] .bug-report-button:hover {
  background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
}

/* Mobile responsive adjustments */
@media (max-width: 768px) {
  .developer-info {
    padding: var(--space-sm) var(--space-md);
    gap: var(--space-sm);
  }

  .developer-name {
    font-size: var(--text-base);
  }

  .developer-link {
    width: 36px;
    height: 36px;
  }

  .developer-link i {
    font-size: 1rem;
  }

  .bug-report-button {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
  }

  .bug-report-button i {
    font-size: 0.8rem;
  }
}