* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Arial', sans-serif;
            line-height: 1.6;
            color: #333;
            overflow-x: hidden;
        }

      .hero {
    position: relative;
    overflow: hidden;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;

    /* Supprime le background dégradé ici, 

        .hero-content {
            text-align: center;
            color: white;
            z-index: 2;
            position: relative;
            max-width: 800px;
            padding: 0 2rem;
        }

       car la vidéo va le recouvrir */
    /* background: linear-gradient(135deg, #dc2626 0%, #000000 100%); */
        }

        /* Vidéo de fond */
        .background-video {
            position: absolute;
            top: 50%;
            left: 50%;
            min-width: 100%;
            min-height: 100%;
            width: auto;
            height: auto;
            transform: translate(-50%, -50%);
            object-fit: cover;
            filter: brightness(0.6);
            z-index: 0;

        }

        /* Contenu par-dessus la vidéo */
        .hero-content {
            position: relative;
            z-index: 1;
            color: white;
            text-align: center;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
            animation: float 20s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px) rotate(0deg); }
            50% { transform: translateY(-20px) rotate(1deg); }
        }



        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            font-weight: 700;
            letter-spacing: -2px;
            animation: slideInDown 1s ease-out;
        }

        .hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            opacity: 0.9;
            animation: slideInUp 1s ease-out 0.3s both;
        }

        .cta-button {
            background: #dc2626;
            color: white;
            padding: 1rem 2rem;
            border: none;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            animation: slideInUp 1s ease-out 0.6s both;
            border: 2px solid transparent;
        }

        .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(220, 38, 38, 0.4);
            background: white;
            color: #dc2626;
            border: 2px solid #dc2626;
        }

        @keyframes slideInDown {
            from { opacity: 0; transform: translateY(-50px); }
            to { opacity: 1; transform: translateY(0); }
        }

        @keyframes slideInUp {
            from { opacity: 0; transform: translateY(50px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Navigation */
        nav {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            padding: 1rem 0;
            transition: all 0.3s ease;
        }

        nav.scrolled {
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: #dc2626;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 2rem;
        }

        .nav-menu a {
            text-decoration: none;
            color: #000;
            font-weight: 500;
            transition: color 0.3s ease;
        }

        .nav-menu a:hover {
            color: #dc2626;
        }

        /* Sections */
        .section {
            padding: 5rem 0;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 2rem;
            padding-right: 2rem;
        }

        .section h2 {
            font-size: 2.5rem;
            margin-bottom: 3rem;
            text-align: center;
            color: #000;
            position: relative;
        }

        .section h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: #dc2626;
            border-radius: 2px;
        }

        /* Services Grid */
        .services-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px; /* espace entre les cartes */
        padding: 20px 0;
        }

         .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        /* Pour les petits écrans, on passe à 2 colonnes */
        @media (max-width: 900px) {
        .services-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        }

        /* Pour les très petits écrans (mobile), une seule colonne */
        @media (max-width: 500px) {
        .services-grid {
            grid-template-columns: 1fr;
        }
        }

        .service-card {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 5px 25px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
            border: 1px solid rgba(220, 38, 38, 0.1);
        }

        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(220, 38, 38, 0.2);
            border-color: #dc2626;
        }

        .service-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #dc2626, #000000);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
            color: white;
        }

        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: #000;
        }

        .service-card p {
            color: #333;
            line-height: 1.8;
        }

        /* Student Services */
        .student-services {
            background: linear-gradient(135deg, #000000 0%, #dc2626 100%);
            padding: 5rem 0;
            color: white;
        }

        .student-services h2 {
            color: white;
        }

        .student-services h2::after {
            background: white;
        }

        .student-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
            margin-top: 3rem;
        }

        .student-item {
            background: rgba(255, 255, 255, 0.1);
            padding: 1.5rem;
            border-radius: 10px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: all 0.3s ease;
        }

        .student-item:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-5px);
            border-color: white;
        }

        /* Contact Section */
        .contact-section {
            background: #f8f9fa;
            padding: 5rem 0;
        }

        .contact-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 3rem;
            margin-top: 3rem;
        }

        .contact-info {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 5px 25px rgba(0, 0, 0, 0.1);
        }

        .contact-item {
            display: flex;
            align-items: center;
            margin-bottom: 1.5rem;
        }

        .contact-icon {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, #dc2626, #000000);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
            color: white;
            font-size: 1.2rem;
        }

        .contact-form {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 5px 25px rgba(0, 0, 0, 0.1);
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            color: #333;
            font-weight: 500;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 0.8rem;
            border: 2px solid #e9ecef;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #dc2626;
        }

        .submit-btn {
            background: linear-gradient(135deg, #dc2626, #000000);
            color: white;
            padding: 1rem 2rem;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
        }

        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(220, 38, 38, 0.4);
            
        }

          /* Table styles */
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 1rem;
        }

        thead tr {
            background: #dc2626;
            color: white;
        }

        th, td {
            padding: 1rem;
            border: 1px solid #ddd;
            text-align: left;
        }


        /* Footer */
        footer {
            background: #000;
            color: white;
            text-align: center;
            padding: 2rem 0;
            border-top: 3px solid #dc2626;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .nav-menu {
                display: none;
            }
            
            .section {
                padding: 3rem 1rem;
            }
            
            .services-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Animations */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

.realisations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 30px;

}

.realisation-card {
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 10px rgba(0,0,0,0.1);
  text-align: center;
  padding: 10px;
}

.realisation-card img {
  width: 100%;
  height: auto;
  border-bottom: 1px solid #ccc;
    height: 200px;
  width: auto;
}