/* ===== DESIGN SYSTEM ===== */

/* Couleurs - Mode clair */
:root {
  /* Couleurs primaires */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;
  
  /* Couleurs secondaires */
  --color-secondary-50: #faf5ff;
  --color-secondary-100: #f3e8ff;
  --color-secondary-200: #e9d5ff;
  --color-secondary-300: #d8b4fe;
  --color-secondary-400: #c084fc;
  --color-secondary-500: #a855f7;
  --color-secondary-600: #9333ea;
  --color-secondary-700: #7c3aed;
  --color-secondary-800: #6b21a8;
  --color-secondary-900: #581c87;
  
  /* Couleurs neutres */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Couleurs de statut */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #06b6d4;
  
  /* Couleurs de période géologique */
  --color-triassic: #ef4444;
  --color-jurassic: #3b82f6;
  --color-cretaceous: #10b981;
  
  /* Arrière-plans */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --bg-inverse: #1f2937;
  
  /* Textes */
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-tertiary: #6b7280;
  --text-inverse: #f9fafb;
  --text-on-primary: #ffffff;
  
  /* Bordures */
  --border-color: #e5e7eb;
  --border-color-light: #f3f4f6;
  --border-color-dark: #9ca3af;
  
  /* Ombres */
  --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);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Rayons */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Espacements */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  
  /* Typographie */
  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
  
  /* Tailles de police */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  
  /* Line heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

/* Mode sombre */
[data-theme="dark"] {
  /* Couleurs primaires */
  --color-primary-50: #1e3a8a;
  --color-primary-100: #1e40af;
  --color-primary-200: #1d4ed8;
  --color-primary-300: #2563eb;
  --color-primary-400: #3b82f6;
  --color-primary-500: #60a5fa;
  --color-primary-600: #93c5fd;
  --color-primary-700: #bfdbfe;
  --color-primary-800: #dbeafe;
  --color-primary-900: #eff6ff;
  
  /* Couleurs secondaires */
  --color-secondary-50: #581c87;
  --color-secondary-100: #6b21a8;
  --color-secondary-200: #7c3aed;
  --color-secondary-300: #9333ea;
  --color-secondary-400: #a855f7;
  --color-secondary-500: #c084fc;
  --color-secondary-600: #d8b4fe;
  --color-secondary-700: #e9d5ff;
  --color-secondary-800: #f3e8ff;
  --color-secondary-900: #faf5ff;
  
  /* Couleurs neutres */
  --color-gray-50: #111827;
  --color-gray-100: #1f2937;
  --color-gray-200: #374151;
  --color-gray-300: #4b5563;
  --color-gray-400: #6b7280;
  --color-gray-500: #9ca3af;
  --color-gray-600: #d1d5db;
  --color-gray-700: #e5e7eb;
  --color-gray-800: #f3f4f6;
  --color-gray-900: #f9fafb;
  
  /* Arrière-plans */
  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --bg-tertiary: #374151;
  --bg-inverse: #f9fafb;
  
  /* Textes */
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-tertiary: #9ca3af;
  --text-inverse: #111827;
  
  /* Bordures */
  --border-color: #374151;
  --border-color-light: #4b5563;
  --border-color-dark: #6b7280;
  
  /* Ombres (adaptées pour le mode sombre) */
  --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, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* ===== RESET & BASE ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-700);
}

a:focus {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* ===== ACCESSIBILITY ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus visible pour meilleure accessibilité */
:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* Préférence de mouvement réduit */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== LAYOUT ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-8);
  }
}

/* ===== HEADER & NAVIGATION ===== */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
  background-color: rgba(var(--bg-primary), 0.9);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--text-primary);
}

.logo {
  width: 2rem;
  height: 2rem;
  color: var(--color-primary-600);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--space-6);
}

.nav-link {
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

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

.icon-sun,
.icon-moon {
  width: 1.25rem;
  height: 1.25rem;
}

[data-theme="dark"] .icon-sun {
  display: none;
}

[data-theme="light"] .icon-moon {
  display: none;
}

/* Mobile menu */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
}

/* ===== MAIN CONTENT ===== */
.main {
  min-height: 100vh;
}

.section {
  padding: var(--space-16) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

@media (min-width: 768px) {
  .section-title {
    font-size: var(--text-4xl);
  }
}

.section-description {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== HERO SECTION ===== */
.hero {
  position: relative;
  padding: var(--space-24) 0;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
}

.hero-svg {
  width: 100%;
  height: 100%;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.hero-title {
  font-size: var(--text-5xl);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 4rem;
  }
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  line-height: var(--leading-relaxed);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: 500;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:focus {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Button variants */
.btn-primary {
  background-color: var(--color-primary-600);
  color: var(--text-on-primary);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-700);
}

.btn-secondary {
  background-color: var(--color-secondary-600);
  color: var(--text-on-primary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-secondary-700);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-secondary);
  border-color: var(--border-color);
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

/* Button sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

/* ===== FORMS ===== */
.form-input,
.form-select {
  display: block;
  width: 100%;
  padding: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input::placeholder {
  color: var(--text-tertiary);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.form-row label {
  font-weight: 500;
  color: var(--text-secondary);
}

/* ===== CARDS ===== */
.card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-color);
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-6);
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

/* ===== FILTERS ===== */
.filters-panel {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-8);
}

.filters-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
}

.filters-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.filter-group label {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.active-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  background-color: var(--color-primary-100);
  color: var(--color-primary-800);
  border-radius: var(--radius-full);
}

[data-theme="dark"] .chip {
  background-color: var(--color-primary-900);
  color: var(--color-primary-200);
}

.chip-remove {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-primary-600);
}

/* ===== CONTROLS BAR ===== */
.controls-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.sort-controls,
.export-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.sort-controls label {
  font-weight: 500;
  color: var(--text-secondary);
}

/* ===== DINOSAUR GRID ===== */
.dinosaur-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.dinosaur-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.dinosaur-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.dinosaur-card-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-color);
}

.dinosaur-name {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.dinosaur-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.dinosaur-badge {
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-md);
}

.badge-period {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
}

.badge-diet {
  background-color: var(--color-secondary-100);
  color: var(--color-secondary-800);
}

[data-theme="dark"] .badge-diet {
  background-color: var(--color-secondary-900);
  color: var(--color-secondary-200);
}

.dinosaur-card-body {
  padding: var(--space-6);
}

.dinosaur-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

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

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

/* ===== PAGINATION ===== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-2);
}

.pagination-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.pagination-btn.active {
  background-color: var(--color-primary-600);
  color: var(--text-on-primary);
  border-color: var(--color-primary-600);
}

.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ===== TIMELINE ===== */
.timeline-container {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-8);
}

.timeline-controls {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.timeline-viewport {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
}

.timeline-svg {
  width: 100%;
  height: 300px;
}

.timeline-legend {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-top: var(--space-4);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.legend-color {
  width: 1rem;
  height: 1rem;
  border-radius: var(--radius-sm);
}

/* ===== TABS ===== */
.tabs-nav {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--space-6);
  overflow-x: auto;
}

.tab-btn {
  padding: var(--space-4) var(--space-6);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

.tab-btn.active {
  color: var(--color-primary-600);
  border-bottom-color: var(--color-primary-600);
}

.tabs-content {
  min-height: 200px;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

/* ===== CALCULATIONS ===== */
.calculation-card,
.verification-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
}

.calculation-card h3,
.verification-card h3 {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.formula {
  background-color: var(--bg-secondary);
  border-left: 4px solid var(--color-primary-600);
  padding: var(--space-4);
  margin-bottom: var(--space-6);
  border-radius: var(--radius-md);
}

.formula p {
  margin-bottom: var(--space-2);
}

.formula p:last-child {
  margin-bottom: 0;
}

.constants-display,
.calculation-demo,
.calculation-interactive {
  margin-bottom: var(--space-6);
}

.constants-display h4,
.calculation-demo h4,
.calculation-interactive h4 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.calculation-result {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  font-weight: 500;
}

.verification-controls {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.verification-results {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

/* ===== COMPARISON ===== */
.comparison-container {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-8);
}

@media (max-width: 1024px) {
  .comparison-container {
    grid-template-columns: 1fr;
  }
}

.comparison-selector {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.comparison-selector h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.species-selector {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-height: 400px;
  overflow-y: auto;
}

.species-option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.species-option:hover {
  background-color: var(--bg-tertiary);
}

.species-option input[type="checkbox"] {
  cursor: pointer;
}

.comparison-results {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.comparison-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 200px;
  color: var(--text-tertiary);
}

/* ===== DOCUMENTATION ===== */
.documentation-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-color);
}

.markdown-content {
  line-height: var(--leading-relaxed);
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.markdown-content h1 {
  font-size: var(--text-3xl);
  font-weight: 700;
}

.markdown-content h2 {
  font-size: var(--text-2xl);
  font-weight: 600;
}

.markdown-content h3 {
  font-size: var(--text-xl);
  font-weight: 600;
}

.markdown-content p {
  margin-bottom: var(--space-4);
}

.markdown-content ul,
.markdown-content ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.markdown-content li {
  margin-bottom: var(--space-2);
}

.markdown-content code {
  background-color: var(--bg-tertiary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.markdown-content pre {
  background-color: var(--bg-tertiary);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--space-4);
}

.markdown-content pre code {
  background: none;
  padding: 0;
}

.markdown-content blockquote {
  border-left: 4px solid var(--color-primary-600);
  padding-left: var(--space-4);
  margin-bottom: var(--space-4);
  font-style: italic;
  color: var(--text-secondary);
}

.markdown-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-4);
}

.markdown-content th,
.markdown-content td {
  padding: var(--space-2);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

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

/* ===== TESTS ===== */
.tests-container {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.tests-controls {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.tests-results {
  background-color: var(--bg-primary);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.tests-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 200px;
  color: var(--text-tertiary);
}

.test-result {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
}

.test-result.success {
  background-color: rgba(16, 185, 129, 0.1);
  border-left: 4px solid var(--color-success);
}

.test-result.error {
  background-color: rgba(239, 68, 68, 0.1);
  border-left: 4px solid var(--color-error);
}

.test-name {
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.test-message {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* ===== MODAL ===== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  max-width: 800px;
  max-height: 90vh;
  width: 90%;
  overflow: hidden;
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}

.modal.active .modal-content {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-color);
}

.modal-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--text-2xl);
  cursor: pointer;
  color: var(--text-secondary);
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

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

.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
  max-height: calc(90vh - 80px);
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--space-12) 0 var(--space-6);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer-section h4 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.footer-section p {
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--space-2);
}

.footer-section ul li a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-tertiary);
}

/* ===== UTILITIES ===== */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.font-mono {
  font-family: var(--font-mono);
}

.font-bold {
  font-weight: 700;
}

.font-semibold {
  font-weight: 600;
}

.font-medium {
  font-weight: 500;
}

.text-xs {
  font-size: var(--text-xs);
}

.text-sm {
  font-size: var(--text-sm);
}

.text-lg {
  font-size: var(--text-lg);
}

.text-xl {
  font-size: var(--text-xl);
}

.text-2xl {
  font-size: var(--text-2xl);
}

.text-primary {
  color: var(--text-primary);
}

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

.text-tertiary {
  color: var(--text-tertiary);
}

.mb-0 {
  margin-bottom: 0;
}

.mb-2 {
  margin-bottom: var(--space-2);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-6 {
  margin-bottom: var(--space-6);
}

.mb-8 {
  margin-bottom: var(--space-8);
}

.mt-0 {
  margin-top: 0;
}

.mt-2 {
  margin-top: var(--space-2);
}

.mt-4 {
  margin-top: var(--space-4);
}

.mt-6 {
  margin-top: var(--space-6);
}

.mt-8 {
  margin-top: var(--space-8);
}

.hidden {
  display: none;
}

.visible {
  display: block;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .controls-bar {
    flex-direction: column;
    align-items: stretch;
  }
  
  .sort-controls,
  .export-controls {
    justify-content: center;
  }
  
  .dinosaur-grid {
    grid-template-columns: 1fr;
  }
  
  .dinosaur-stats {
    grid-template-columns: 1fr;
  }
  
  .tabs-nav {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

@media (max-width: 480px) {
  .section-title {
    font-size: var(--text-2xl);
  }
  
  .hero-title {
    font-size: var(--text-3xl);
  }
  
  .hero-subtitle {
    font-size: var(--text-base);
  }
  
  .filters-content {
    grid-template-columns: 1fr;
  }
  
  .timeline-controls {
    flex-wrap: wrap;
  }
}

/* ===== PRINT ===== */
@media print {
  .header,
  .footer,
  .modal,
  .btn,
  .theme-toggle {
    display: none;
  }
  
  .section {
    break-inside: avoid;
  }
  
  .dinosaur-card {
    break-inside: avoid;
  }
}