/* =========================================
   2. Éléments généraux
   ========================================= */
   .section {
    padding: 80px 0;
    position: relative;
    overflow: hidden;
  }
  
  .section-title {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    position: relative;
  }
  
  .light {
    color: white;
  }
  
  .text-center {
    text-align: center;
  }
  
  .text-light {
    color: white;
  }
  
  /* =========================================
     3. Layout et grilles
     ========================================= */
  /* Grilles réutilisables avec configuration de base commune */
  .about-grid,
  .values-grid,
  .research-grid,
  .stats-grid,
  .equipment-grid {
    display: grid;
    gap: 30px;
    margin-top: 3rem;
  }
  
  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    position: relative;
    z-index: 2;
  }
  
  .values-grid,
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
  
  .research-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
  
  .equipment-grid {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
  }
  
  /* =========================================
     4. En-têtes et sections
     ========================================= */
  /* En-tête de page */
  .page-header {
    padding: 100px 0 50px;
    text-align: center;
    position: relative;
  }
  
  .page-title {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: white;
  }
  
  .page-subtitle {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
  }
  
  /* Lignes décoratives */
  .section-line,
  .header-line,
  .content-line {
    height: 4px;
    background: var(--color-accent);
    margin-bottom: 2rem;
    transition: width 0.5s ease;
  }
  
  .section-line {
    width: 60px;
  }
  
  .header-line {
    width: 100px;
    margin: 1rem auto 1.5rem;
  }
  
  .content-line {
    width: 50px;
    height: 3px;
    margin: 1rem 0 1.5rem;
  }
  
  .section-line.center {
    margin-left: auto;
    margin-right: auto;
  }
  
  .section-title:hover + .section-line, 
  .section-line:hover {
    width: 120px;
  }
  
  /* Arrière-plans de section */
  .bg-gradient {
    background: linear-gradient(135deg, var(--color-primary-dark));
    color: white;
  }
  
  .bg-gradient-dark {
    background: linear-gradient(135deg, var(--color-secondary-dark));
    color: white;
  }
  
  .bg-tech-pattern {
    background-color: #f9f9f9;
    background-image: url('../images/tech-pattern.png');
    position: relative;
  }
  
  .bg-light {
    background-color: var(--color-gray-100);
  }
  
  /* Section avec effet parallaxe */
  .parallax-section {
    background-image: url('../images/tech-background.jpg');
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    color: white;
    position: relative;
  }
  
  .parallax-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(241, 245, 250, 0.85);
  }
  
  /* =========================================
     5. Composants réutilisables
     ========================================= */
  /* Boutons améliorés */
  .btn-glow {
    position: relative;
    overflow: hidden;
    box-shadow: 0 0 15px rgba(var(--color-secondary-rgb), 0.5);
    transition: all 0.3s ease;
  }
  
  .btn-glow:hover {
    box-shadow: 0 0 25px rgba(var(--color-secondary-rgb), 0.8);
    transform: translateY(-3px);
  }
  
  .btn-glow::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: 0.5s;
  }
  
  .btn-glow:hover::after {
    left: 100%;
  }
  
  /* Effets de survol communs */
  .hover-scale:hover {
    transform: scale(1.05);
  }
  
  /* =========================================
     6. Sections spécifiques
     ========================================= */
  /* Section À propos */
  .about-content {
    padding: 2.5rem;
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border-left: 5px solid var(--color-primary);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  
  .about-content h2 {
    color: blue;
  }
  
  .about-content p {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: #000000;
    font-weight: 400;
  }
  
  /* Images et overlays */
  .image-frame {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
  }
  
  .image-frame:hover {
    transform: translateY(-10px);
  }
  
  .about-image {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
  }
  
  .image-overlay,
  .equipment-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
  }
  
  .image-overlay {
    background: rgba(var(color-secondary), 0.7);
  }
  
  .equipment-overlay {
    background: rgba(var(--color-primary-rgb), 0.7);
  }
  
  .image-frame:hover .image-overlay,
  .equipment-card:hover .equipment-overlay {
    opacity: 1;
  }
  
  .overlay-content,
  .equipment-overlay-content {
    text-align: center;
    color: white;
  }
  
  .overlay-content i {
    margin-bottom: 10px;
  }
  
  /* Section Mission */
  .mission-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 40px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .mission-text {
    font-size: 1.25rem;
    line-height: 1.8;
    font-style: italic;
    text-align: center;
    margin-bottom: 2rem;
  }
  
  .mission-icon-container {
    text-align: center;
  }
  
  .mission-icon-circle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid white;
    font-size: 1.8rem;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
  }
  
  /* Section Valeurs - Cartes 3D */
  .value-card-3d {
    height: 200px;
    perspective: 1000px;
    cursor: pointer;
  }
  
  .card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
    box-shadow: 0 15px 25px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
  }
  
  .value-card-3d:hover .card-inner {
    transform: rotateY(180deg);
  }
  
  .card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
  }
  
  .card-front {
    background: white;
    color: var(--color-primary);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  }
  
  .card-back {
    background: var(--color-primary);
    color: white;
    transform: rotateY(180deg);
  }
  
  .value-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    color: var(--color-accent);
  }
  
  /* Section Recherche */
  .research-area-card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    z-index: 1;
    overflow: hidden;
  }
  
  .research-area-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
  }
  
  .research-icon {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: 20px;
  }
  
  .research-area-card h3 {
    margin-bottom: 15px;
    color: var(--color-primary);
    position: relative;
    display: inline-block;
  }
  
  .research-area-card h3::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--color-secondary);
    transition: width 0.3s ease;
  }
  
  .research-area-card:hover h3::after {
    width: 100%;
  }
  
  .research-list {
    list-style: none;
    padding: 0;
    margin: 20px 0 0;
  }
  
  .research-list li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
  }
  
  .research-list li i {
    color: var(--color-secondary);
    margin-right: 10px;
  }
  
  .card-highlight {
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 0;
    background: var(--color-accent);
    transition: height 0.3s ease;
  }
  
  .research-area-card:hover .card-highlight {
    height: 100%;
  }
  
  /* Section Statistiques */
  .stat-card {
    text-align: center;
    padding: 20px;
    position: relative;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    backdrop-filter: blur(5px);
    transition: transform 0.3s ease;
  }
  
  .stat-card:hover {
    transform: translateY(-10px);
  }
  
  .stat-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    border: 3px solid var(--color-accent);
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: 0 0 20px rgba(var(--color-accent-rgb), 0.5);
  }
  
  .stat-number {
    font-size: 2.5rem;
    font-weight: bold;
  }
  
  .stat-label {
    font-size: 1.2rem;
    margin-bottom: 10px;
  }
  
  .stat-icon {
    font-size: 1.5rem;
    color: var(--color-accent);
  }
  
  /* Section Équipements */
  .equipment-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
  }
  
  .equipment-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
  }
  
  .equipment-image-container {
    position: relative;
    overflow: hidden;
    height: 200px;
  }
  
  .equipment-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }
  
  .equipment-card:hover .equipment-image {
    transform: scale(1.1);
  }
  
  .equipment-content {
    padding: 25px;
  }
  
  .equipment-content h3 {
    color: var(--color-primary);
    margin-bottom: 15px;
  }
  
  .equipment-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
  }
  
  .equipment-specs span {
    background: var(--color-gray-100);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 5px;
  }
  
  .equipment-specs i {
    color: var(--color-secondary);
  }
  
  /* Section Partenaires */
  .partners-slider {
    width: 100%;
    overflow: hidden;
    margin: 3rem 0;
    position: relative;
    padding: 20px 0;
  }
  
  .partners-track {
    display: flex;
    gap: 50px;
    width: fit-content;
  }
  
  .partner-logo {
    flex-shrink: 0;
    width: 150px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 8px;
    padding: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  
  .partner-logo:hover {
    transform: scale(1.1);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  }
  
  .partner-logo img {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
  }
  
  .partnership-cta {
    margin-top: 3rem;
    text-align: center;
  }
  
  .partnership-cta h3 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    color: var(--color-primary);
  }
  
  /* =========================================
     7. Animations
     ========================================= */
  @keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }
  
  @keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(calc(-100% + 100vw)); }
  }
  
  /* =========================================
     8. Media Queries
     ========================================= */
  @media (max-width: 992px) {
    .about-grid {
      grid-template-columns: 1fr;
    }
    
    .about-content {
      padding-right: 0;
    }
    
    .values-grid, 
    .stats-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  
  @media (max-width: 768px) {
    .page-title {
      font-size: 2.5rem;
    }
    
    .values-grid, 
    .stats-grid, 
    .equipment-grid,
    .research-grid {
      grid-template-columns: 1fr;
    }
    
    .section {
      padding: 50px 0;
    }
  }