/* Critical CSS pour éviter le FOUC et optimiser LCP */
body { 
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f3f4f6;
  /* Optimisation critique pour LCP */
  text-rendering: optimizeSpeed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Optimisation critique du contenu above-the-fold */
#accueil {
  background: linear-gradient(135deg, #1f2937, #1e3a8a, #581c87);
  color: white;
  min-height: 100vh;
  padding-top: 4rem;
  position: relative;
  overflow: hidden;
}

/* Optimisation du texte LCP */
.lcp-text {
  font-size: 1.125rem;
  line-height: 1.75rem;
  color: #e5e7eb;
  max-width: 42rem;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .lcp-text {
    font-size: 1.25rem;
    line-height: 1.75rem;
  }
}

@media (min-width: 1024px) {
  .lcp-text {
    font-size: 1.5rem;
    line-height: 2rem;
  }
}

.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #1f2937, #3b82f6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  color: white;
}
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255,255,255,0.3);
  border-top: 4px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Optimisation critique pour éviter le layout shift */
.critical-content {
  contain: layout style paint;
  content-visibility: visible;
}

/* Responsive optimizations critiques */
@media (max-width: 768px) {
  .lcp-text {
    font-size: 1rem;
    line-height: 1.5rem;
    padding: 0 1rem;
  }
  
  #accueil {
    padding-top: 5rem;
    padding-left: 1rem;
    padding-right: 1rem;
  }
  
  /* Optimisation des titres pour mobile */
  h1 {
    font-size: 2.5rem !important;
    line-height: 1.1;
  }
  
  h2 {
    font-size: 2rem !important;
    line-height: 1.2;
  }
  
  /* Éviter les débordements */
  * {
    max-width: 100%;
    box-sizing: border-box;
    word-wrap: break-word;
  }
}

@media (max-width: 480px) {
  .lcp-text {
    font-size: 0.9rem;
    line-height: 1.4rem;
  }
  
  h1 {
    font-size: 2rem !important;
  }
  
  h2 {
    font-size: 1.75rem !important;
  }
  
  /* Optimisation des espacements pour petits écrans */
  .container {
    padding-left: 0.5rem;
    padding-right: 0.5rem;
  }
}

/* Optimisation des boutons pour mobile */
@media (max-width: 768px) {
  button, .btn, a[role="button"] {
    min-width: 48px;
    min-height: 48px;
    font-size: 1rem;
    padding: 12px 16px;
    font-weight: 600;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }
}