/* =============================================================================
   Design System - Tokens et Variables CSS
   ============================================================================= */

:root {
  /* Grille 8pt - Base spacing unit */
  --space-0: 0;
  --space-1: 0.125rem;   /* 2px */
  --space-2: 0.25rem;    /* 4px */
  --space-4: 0.5rem;     /* 8px - base unit */
  --space-6: 0.75rem;    /* 12px */
  --space-8: 1rem;       /* 16px */
  --space-12: 1.5rem;    /* 24px */
  --space-16: 2rem;      /* 32px */
  --space-20: 2.5rem;    /* 40px */
  --space-24: 3rem;      /* 48px */
  --space-32: 4rem;      /* 64px */
  --space-40: 5rem;      /* 80px */
  --space-48: 6rem;      /* 96px */
  --space-64: 8rem;      /* 128px */

  /* Couleurs - Mode clair */
  --color-primary: #1e40af;        /* Bleu roi */
  --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;
  --color-primary-950: #172554;

  /* Couleurs sémantiques */
  --color-background: #ffffff;
  --color-surface: #f8fafc;
  --color-surface-elevated: #ffffff;
  --color-border: #e2e8f0;
  --color-border-hover: #cbd5e1;
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #64748b;
  --color-text-inverse: #ffffff;

  /* États */
  --color-success: #059669;
  --color-warning: #d97706;
  --color-error: #dc2626;
  --color-info: #0284c7;

  /* Ombres */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-base: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Typographie */
  --font-family-base: 'Inter', system-ui, -apple-system, sans-serif;
  --font-family-mono: 'SF Mono', Consolas, 'Liberation Mono', Menlo, monospace;

  /* Échelle typographique (modular scale 1.25) */
  --font-size-xs: 0.75rem;      /* 12px */
  --font-size-sm: 0.875rem;     /* 14px */
  --font-size-base: 1rem;       /* 16px */
  --font-size-lg: 1.125rem;     /* 18px */
  --font-size-xl: 1.25rem;      /* 20px */
  --font-size-2xl: 1.5rem;      /* 24px */
  --font-size-3xl: 1.875rem;    /* 30px */
  --font-size-4xl: 2.25rem;     /* 36px */
  --font-size-5xl: 3rem;        /* 48px */
  --font-size-6xl: 3.75rem;     /* 60px */

  /* Line heights */
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;

  /* Font weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Border radius */
  --radius-sm: 0.25rem;    /* 4px */
  --radius-base: 0.5rem;   /* 8px */
  --radius-md: 0.75rem;    /* 12px */
  --radius-lg: 1rem;       /* 16px */
  --radius-xl: 1.5rem;     /* 24px */
  --radius-full: 9999px;

  /* 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-base: 150ms ease;
  --transition-slow: 300ms ease;
  --transition-colors: color 150ms ease, background-color 150ms ease, border-color 150ms ease;
  --transition-transform: transform 150ms ease;
}

/* Mode sombre */
[data-theme="dark"] {
  --color-background: #0f172a;
  --color-surface: #1e293b;
  --color-surface-elevated: #334155;
  --color-border: #334155;
  --color-border-hover: #475569;
  --color-text-primary: #f1f5f9;
  --color-text-secondary: #cbd5e1;
  --color-text-muted: #94a3b8;
  --color-text-inverse: #0f172a;

  --color-primary: #3b82f6;
  --color-primary-50: #172554;
  --color-primary-100: #1e3a8a;
  --color-primary-200: #1e40af;
  --color-primary-300: #1d4ed8;
  --color-primary-400: #2563eb;
  --color-primary-500: #3b82f6;
  --color-primary-600: #60a5fa;
  --color-primary-700: #93c5fd;
  --color-primary-800: #bfdbfe;
  --color-primary-900: #dbeafe;
  --color-primary-950: #eff6ff;
}

/* =============================================================================
   Reset et base
   ============================================================================= */

*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  transition: var(--transition-colors);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Amélioration de l'accessibilité */
@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;
  }
}

/* Focus visible pour l'accessibilité */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Screen reader only */
.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;
}

/* =============================================================================
   Layout Components
   ============================================================================= */

.container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  width: 100%;
  margin: 0;
  padding-inline: var(--space-16);
  position: relative;
}

/* =============================================================================
   Theme Toggle
   ============================================================================= */

.theme-toggle {
  position: fixed;
  top: var(--space-16);
  right: var(--space-16);
  z-index: var(--z-fixed);

  display: flex;
  align-items: center;
  justify-content: center;

  width: var(--space-24);
  height: var(--space-24);

  background-color: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);

  color: var(--color-text-primary);
  cursor: pointer;

  transition: var(--transition-colors), var(--transition-transform);
  box-shadow: var(--shadow-md);
}

.theme-toggle:hover {
  background-color: var(--color-surface);
  border-color: var(--color-border-hover);
  transform: scale(1.05);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.theme-toggle .sun-icon {
  display: block;
}

.theme-toggle .moon-icon {
  display: none;
}

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

[data-theme="dark"] .theme-toggle .moon-icon {
  display: block;
}

/* =============================================================================
   Navigation
   ============================================================================= */

.main-nav {
  padding-block: var(--space-16);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-background);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  backdrop-filter: blur(8px);
  width: 100%;
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-16);
}

.logo img {
  height: var(--space-24);
  width: auto;
  transition: var(--transition-transform);
}

.logo img:hover {
  transform: scale(1.02);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: var(--transition-colors);
}

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

.breadcrumb a[aria-current="page"] {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
}

/* =============================================================================
   Main Content
   ============================================================================= */

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-48);
  padding-block: var(--space-48);
}

/* =============================================================================
   Hero Section
   ============================================================================= */

.hero-section {
  text-align: center;
  max-width: 48rem;
  margin-inline: auto;
}

.hero-header {
  margin-bottom: var(--space-32);
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-16);
  color: var(--color-text-primary);
}

.accent-text {
  color: var(--color-primary);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-600));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: var(--font-size-xl);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
  max-width: 32rem;
  margin-inline: auto;
}

/* =============================================================================
   CTA Section
   ============================================================================= */

.cta-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
  align-items: center;
}

/* =============================================================================
   Buttons
   ============================================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);

  padding: var(--space-12) var(--space-24);

  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-tight);

  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);

  cursor: pointer;
  user-select: none;

  transition: var(--transition-colors), var(--transition-transform);

  /* Taille cible minimum de 48px pour l'accessibilité */
  min-height: var(--space-24);
  min-width: var(--space-24);
}

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

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background-color: var(--color-primary-700);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: var(--color-surface-elevated);
  color: var(--color-text-primary);
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--color-surface);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

.external-icon {
  opacity: 0.7;
  flex-shrink: 0;
}

/* =============================================================================
   Features Section
   ============================================================================= */

.features-section {
  max-width: 72rem;
  margin-inline: auto;
}

.features-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  text-align: center;
  margin-bottom: var(--space-32);
  color: var(--color-text-primary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-24);
}

.feature-card {
  padding: var(--space-24);
  background-color: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-colors), var(--transition-transform);
}

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

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--space-24);
  height: var(--space-24);
  background-color: var(--color-primary-100);
  color: var(--color-primary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-16);
}

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

.feature-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-8);
  color: var(--color-text-primary);
}

.feature-description {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
}

/* =============================================================================
   Footer
   ============================================================================= */

.main-footer {
  margin-top: var(--space-48);
  padding-block: var(--space-32);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-24);
  margin-bottom: var(--space-24);
}

.footer-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.footer-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.footer-subtitle {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

.footer-description {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: var(--transition-colors);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
  text-align: center;
  padding-top: var(--space-16);
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.footer-made-with {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* =============================================================================
   Responsive Design
   ============================================================================= */

/* Large screens (1200px+) */
@media (min-width: 1200px) {
  .container {
    padding-inline: var(--space-32);
  }

  .features-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-32);
    max-width: 1400px;
    margin-inline: auto;
  }

  .hero-title {
    font-size: var(--font-size-6xl);
  }

  .hero-section {
    max-width: 60rem;
  }

  .nav-content {
    max-width: 1400px;
    margin: 0 auto;
    padding-inline: var(--space-32);
  }

  .main-footer .footer-content {
    max-width: 1400px;
    margin: 0 auto;
  }
}

/* Extra Large screens (1440px+) */
@media (min-width: 1440px) {
  .container {
    padding-inline: var(--space-40);
  }

  .nav-content {
    max-width: 1600px;
    margin: 0 auto;
    padding-inline: var(--space-40);
  }

  .hero-section {
    max-width: 70rem;
  }

  .features-grid {
    gap: var(--space-40);
    max-width: 1600px;
    margin-inline: auto;
  }

  .feature-card {
    padding: var(--space-32);
  }

  .main-footer .footer-content {
    max-width: 1600px;
    margin: 0 auto;
  }
}

/* Ultra-wide screens (1920px+) */
@media (min-width: 1920px) {
  .container {
    padding-inline: var(--space-48);
  }

  .nav-content {
    max-width: 1800px;
    margin: 0 auto;
    padding-inline: var(--space-48);
  }

  .hero-section {
    max-width: 80rem;
  }

  .features-grid {
    max-width: 1800px;
    gap: var(--space-48);
    margin-inline: auto;
  }

  .feature-card {
    padding: var(--space-40);
  }

  .main-footer .footer-content {
    max-width: 1800px;
    margin: 0 auto;
  }

  .hero-title {
    font-size: 4.5rem;
  }

  .hero-description {
    font-size: var(--font-size-2xl);
    max-width: 40rem;
  }
}

/* Super ultra-wide screens (2560px+) */
@media (min-width: 2560px) {
  .container {
    padding-inline: var(--space-64);
  }

  .nav-content {
    max-width: 2200px;
    margin: 0 auto;
    padding-inline: var(--space-64);
  }

  .hero-section {
    max-width: 90rem;
  }

  .features-grid {
    max-width: 2000px;
    gap: var(--space-64);
    margin-inline: auto;
  }

  .feature-card {
    padding: var(--space-48);
  }

  .main-footer .footer-content {
    max-width: 2200px;
    margin: 0 auto;
  }

  .hero-title {
    font-size: 5rem;
  }

  .hero-description {
    font-size: var(--font-size-3xl);
    max-width: 50rem;
  }

  .features-title {
    font-size: var(--font-size-5xl);
  }
}

/* Medium screens (1024px - 1199px) */
@media (max-width: 1199px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Small tablets and large phones (768px - 1023px) */
@media (max-width: 1023px) {
  .container {
    padding-inline: var(--space-12);
  }

  .nav-content {
    flex-direction: column;
    gap: var(--space-8);
    text-align: center;
  }

  .breadcrumb {
    justify-content: center;
  }

  .hero-section {
    max-width: 100%;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-16);
  }

  .feature-card {
    padding: var(--space-20);
  }

  .cta-section {
    flex-direction: column;
    align-items: stretch;
    max-width: 400px;
    margin-inline: auto;
  }

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

/* Mobile landscape and small tablets (600px - 767px) */
@media (max-width: 767px) {
  .container {
    padding-inline: var(--space-8);
  }

  .main-content {
    gap: var(--space-32);
    padding-block: var(--space-24);
  }

  .hero-title {
    font-size: var(--font-size-3xl);
    line-height: var(--line-height-snug);
  }

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

  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-16);
  }

  .feature-card {
    padding: var(--space-16);
  }

  .feature-icon {
    width: var(--space-20);
    height: var(--space-20);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-16);
    text-align: center;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-8);
  }

  .theme-toggle {
    top: var(--space-8);
    right: var(--space-8);
    width: var(--space-20);
    height: var(--space-20);
  }

  .main-nav {
    padding-block: var(--space-12);
  }

  .logo img {
    height: var(--space-20);
  }
}

/* Mobile portrait (480px - 599px) */
@media (max-width: 599px) {
  .hero-section {
    padding-inline: var(--space-4);
  }

  .hero-header {
    margin-bottom: var(--space-24);
  }

  .hero-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-12);
  }

  .hero-description {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
  }

  .cta-section {
    gap: var(--space-12);
    max-width: 100%;
  }

  .btn {
    padding: var(--space-12) var(--space-16);
    font-size: var(--font-size-sm);
    min-height: var(--space-24);
  }

  .btn-icon {
    width: 16px;
    height: 16px;
  }

  .external-icon {
    width: 14px;
    height: 14px;
  }

  .features-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-24);
  }

  .feature-card {
    padding: var(--space-12);
  }

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

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

/* Very small screens (up to 479px) */
@media (max-width: 479px) {
  .container {
    padding-inline: var(--space-4);
  }

  .main-content {
    padding-block: var(--space-16);
    gap: var(--space-24);
  }

  .hero-title {
    font-size: var(--font-size-xl);
    line-height: var(--line-height-tight);
  }

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

  .btn {
    padding: var(--space-8) var(--space-12);
    font-size: var(--font-size-xs);
    gap: var(--space-2);
  }

  .btn-icon {
    width: 14px;
    height: 14px;
  }

  .theme-toggle {
    width: var(--space-16);
    height: var(--space-16);
    top: var(--space-4);
    right: var(--space-4);
  }

  .theme-toggle svg {
    width: 16px;
    height: 16px;
  }

  .logo img {
    height: var(--space-16);
  }

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

  .feature-card {
    padding: var(--space-8);
  }

  .feature-icon {
    width: var(--space-16);
    height: var(--space-16);
    margin-bottom: var(--space-8);
  }

  .feature-icon svg {
    width: 20px;
    height: 20px;
  }

  .feature-title {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-4);
  }

  .feature-description {
    font-size: var(--font-size-xs);
    line-height: var(--line-height-relaxed);
  }

  .footer-content {
    gap: var(--space-12);
  }

  .footer-section {
    gap: var(--space-4);
  }

  .main-nav {
    padding-block: var(--space-8);
  }

  .nav-content {
    gap: var(--space-4);
  }

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

/* Horizontal orientation adjustments */
@media (max-height: 600px) and (orientation: landscape) {
  .main-content {
    padding-block: var(--space-16);
    gap: var(--space-24);
  }

  .hero-header {
    margin-bottom: var(--space-16);
  }

  .features-section {
    margin-top: var(--space-16);
  }
}

/* Print optimizations */
@media print {
  .container {
    padding-inline: 0;
  }

  .hero-section,
  .features-section {
    break-inside: avoid;
  }

  .feature-card {
    break-inside: avoid;
    margin-bottom: var(--space-16);
  }
}

/* =============================================================================
   Animations et micro-interactions
   ============================================================================= */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(var(--space-16));
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(calc(-1 * var(--space-16)));
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* Animations d'entrée avec respect pour prefers-reduced-motion */
@media (prefers-reduced-motion: no-preference) {
  .hero-header {
    animation: fadeInUp 0.6s ease-out;
  }

  .cta-section {
    animation: fadeInUp 0.6s ease-out 0.2s both;
  }

  .features-section {
    animation: fadeInUp 0.6s ease-out 0.4s both;
  }

  .feature-card:nth-child(1) {
    animation: fadeInUp 0.6s ease-out 0.6s both;
  }

  .feature-card:nth-child(2) {
    animation: fadeInUp 0.6s ease-out 0.8s both;
  }

  .feature-card:nth-child(3) {
    animation: fadeInUp 0.6s ease-out 1s both;
  }
}

/* =============================================================================
   États de chargement et feedback
   ============================================================================= */

.loading {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* =============================================================================
   Contrastes et accessibilité
   ============================================================================= */

/* Contraste élevé pour les utilisateurs qui en ont besoin */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000000;
    --color-text-secondary: #000000;
  }

  [data-theme="dark"] {
    --color-border: #ffffff;
    --color-text-secondary: #ffffff;
  }
}

/* =============================================================================
   Print styles
   ============================================================================= */

@media print {
  .theme-toggle,
  .nav-content,
  .footer-nav {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .btn {
    border: 1px solid black;
    background: white;
    color: black;
  }
}