/* Variables personnalisées */
:root {
    --transition-slow: 0.5s;
    --transition-medium: 0.3s;
    --transition-fast: 0.2s;
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
  }
  
  /* Classes utilitaires pour les boutons */
  .btn-primary {
    display: inline-block;
    padding: 0.75rem 2rem;
    background-color: var(--color-primary);
    color: white;
    font-weight: bold;
    border-radius: 9999px;
    transition: all 0.3s;
    transform: translateY(0);
  }
  
  .btn-primary:hover {
    background-color: var(--color-primary-dark);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    transform: translateY(-4px);
  }
  
  .btn-secondary {
    display: inline-block;
    padding: 0.75rem 2rem;
    background-color: white;
    color: var(--color-primary);
    font-weight: bold;
    border-radius: 9999px;
    border: 2px solid var(--color-primary);
    transition: all 0.3s;
    transform: translateY(0);
  }
  
  .btn-secondary:hover {
    background-color: var(--color-primary);
    color: white;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    transform: translateY(-4px);
  }
  
  /* Styles pour les liens de navigation */
  .nav-link {
    position: relative;
    color: #374151;
    font-weight: 500;
    transition: color 0.3s;
  }
  
  .nav-link:hover {
    color: var(--color-primary);
  }
  
  .nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width 0.3s;
  }
  
  .nav-link:hover::after,
  .nav-link.active::after {
    width: 100%;
  }
  
  .nav-link.active {
    color: var(--color-primary);
    font-weight: 600;
  }
  
  /* Animation de défilement doux vers les ancres */
  html {
    scroll-behavior: smooth;
  }
  
  /* Styles pour les boutons de formulaire */
  input:focus, textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
  }
  
  /* Styles pour les filtres de galerie */
  .filter-btn {
    transition: all 0.3s ease;
  }
  
  .filter-btn.active {
    background-color: var(--color-primary);
    color: white;
  }
  
  /* Animation pour les cartes */
  .card-hover {
    transition: all 0.3s ease;
  }
  
  .card-hover:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  }
  
  /* Animation pour les images de partenaires */
  .partner-logo {
    filter: grayscale(100%);
    opacity: 0.7;
    transition: all 0.3s ease;
  }
  
  .partner-logo:hover {
    filter: grayscale(0%);
    opacity: 1;
  }