/* CSS critique pour optimiser le LCP et réduire le FOUC */

/* Reset minimal et base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: #ffffff;
  background: #000000;
  overflow-x: hidden;
}

/* Variables CSS critiques */
:root {
  --primary: 262.1 83.3% 57.8%;
  --secondary: 270 95.2% 75.3%;
  --accent: 270 95.2% 75.3%;
  --background: 0 0% 3.9%;
  --foreground: 0 0% 98%;
  --primary-foreground: 210 20% 98%;
}

/* Navigation critique */
.navigation-critical {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
}

/* Hero section critique */
.hero-critical {
  min-height: 100vh;
  background: linear-gradient(135deg, hsl(var(--primary)) 0%, hsl(var(--secondary)) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 2rem 1rem;
  text-align: center;
}

.hero-critical::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content-critical {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

/* Titre critique */
.hero-title-critical {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, hsl(var(--primary)), hsl(var(--accent)));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-align: center;
  color: white; /* Fallback pour navigateurs non compatibles */
}

.hero-description-critical {
  font-size: clamp(1.1rem, 2vw, 1.25rem);
  margin-bottom: 2rem;
  opacity: 0.9;
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* Boutons critiques */
.button-critical {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  border: none;
  min-height: 44px;
  font-size: 1rem;
  margin: 0.5rem;
}

.button-primary-critical {
  background: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
  box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
}

.button-primary-critical:hover {
  background: hsl(var(--primary) / 0.9);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px 0 rgba(99, 102, 241, 0.5);
}

.button-secondary-critical {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.button-secondary-critical:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
}

/* Skeleton de chargement */
.loading-skeleton-critical {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: loading-critical 1.5s infinite;
  border-radius: 4px;
  height: 20px;
  margin: 8px 0;
}

@keyframes loading-critical {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Optimisations de performance */
.performance-optimized {
  content-visibility: auto;
  contain-intrinsic-size: 0 500px;
}

/* Images optimisées */
img[loading="lazy"] {
  content-visibility: auto;
  contain-intrinsic-size: 0 200px;
}

/* État fonts loaded */
.fonts-loaded {
  font-display: swap;
}

.fonts-loaded .hero-title-critical,
.fonts-loaded .hero-description-critical {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Responsive critique */
@media (max-width: 768px) {
  .navigation-critical {
    padding: 0 0.5rem;
  }
  
  .hero-critical {
    padding: 1rem 0.5rem;
    min-height: 100vh;
  }
  
  .hero-title-critical {
    font-size: 2.5rem;
    margin-bottom: 1rem;
  }
  
  .hero-description-critical {
    font-size: 1.1rem;
    margin-bottom: 2rem;
  }
  
  .button-critical {
    width: 100%;
    max-width: 280px;
    margin: 0.25rem;
  }
  
  .hero-content-critical {
    padding: 0 1rem;
  }
}

@media (max-width: 480px) {
  .hero-title-critical {
    font-size: 2rem;
  }
  
  .hero-description-critical {
    font-size: 1rem;
  }
  
  .button-critical {
    padding: 0.875rem 1.25rem;
    font-size: 0.9rem;
  }
}

/* Dark mode critique */
@media (prefers-color-scheme: dark) {
  .loading-skeleton-critical {
    background: linear-gradient(90deg, #2a2a2a 25%, #3a3a3a 50%, #2a2a2a 75%);
  }
}

/* Réduction des animations pour les utilisateurs qui le préfèrent */
@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 */
.button-critical:focus-visible {
  outline: 2px solid hsl(var(--primary));
  outline-offset: 2px;
}

/* Amélioration du contraste pour l'accessibilité */
@media (prefers-contrast: high) {
  .hero-title-critical {
    color: white;
    background: none;
    -webkit-text-fill-color: unset;
  }
  
  .hero-description-critical {
    color: white;
    opacity: 1;
  }
  
  .button-primary-critical {
    background: white;
    color: black;
    border: 2px solid white;
  }
}