:root {
            --primary-color: #554466; 
            --secondary-color: #554466; 
            --background-color: #f0f4f8;
            --text-color: #333;
            --light-text-color: #666;
            --white: #fff;
            --dark-blue: #2a3d54;
        }

        body {
            font-family: 'Inter', sans-serif;
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            background-color: var(--white);
            color: var(--text-color);
        }

        /* --- En-tête de la page --- */
        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 3rem;
            background-color: var(--white);
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            border-bottom-left-radius: 2rem;
            border-bottom-right-radius: 2rem;
        }

        .header__logo {
            font-size: 2.2rem;
            font-weight: 800;
            background-image: linear-gradient(to right, var(--secondary-color), var(--primary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .header__nav {
            display: flex;
            gap: 2rem;
            font-weight: 500;
        }

        .header__nav a {
            text-decoration: none;
            color: var(--light-text-color);
            transition: color 0.3s ease;
        }

        .header__nav a:hover, .header__nav .dropdown-btn:hover {
            color: var(--primary-color);
        }

        .header__icons {
            display: flex;
            gap: 1.5rem;
        }

        .header__icons .icon-btn {
            background: none;
            border: none;
            cursor: pointer;
            color: var(--light-text-color);
            font-size: 1.2rem;
            transition: color 0.3s ease;
        }

        .header__icons .icon-btn:hover {
            color: var(--primary-color);
        }

        /* Menu déroulant */
        .dropdown {
            position: relative;
        }

        .dropdown-content {
            display: none;
            position: absolute;
            background-color: var(--white);
            min-width: 12rem;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
            z-index: 1;
            border-radius: 0.75rem;
            padding: 0.5rem 0;
            top: 1.5rem;
            left: 50%;
            transform: translateX(-50%);
        }
        
        .dropdown-content a {
            color: var(--text-color);
            padding: 0.75rem 1rem;
            text-decoration: none;
            display: block;
            border-radius: 0.5rem;
            transition: background-color 0.3s ease;
        }

        .dropdown-content a:hover {
            background-color: #f5f5f5;
        }

        .dropdown:hover .dropdown-content {
            display: block;
        }

        /* --- Section principale (Héros) --- */
        .hero-section {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 4rem 3rem;
            gap: 3rem;
        }

        .hero-section__left {
            flex: 1;
        }

        .hero-section__title {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.2;
            margin: 0 0 1rem 0;
        }

        .hero-section__title .gradient-text {
            background-image: linear-gradient(to right, var(--secondary-color), var(--primary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-section__description {
            font-size: 1rem;
            line-height: 1.6;
            margin-bottom: 2rem;
            color: var(--light-text-color);
        }

        .hero-section__cta {
            background-color: var(--primary-color);
            color: var(--white);
            padding: 1rem 2rem;
            border-radius: 9999px;
            text-decoration: none;
            font-weight: 700;
            box-shadow: 0 4px 15px rgba(255, 145, 0, 0.4);
            transition: transform 0.3s ease, background-color 0.3s ease;
        }

        .hero-section__cta:hover {
            transform: translateY(-3px);
            background-color: #2a3d54;
        }

        .hero-section__right {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .card {
            background-color: var(--white);
            padding: 1.5rem;
            border-radius: 1.5rem;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
            display: flex;
            align-items: center;
            gap: 1rem;
            cursor: pointer;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .card:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
        }
        
        .card__icon {
            font-size: 1.8rem;
            padding: 0.75rem;
            border-radius: 9999px;
            color: var(--white);
        }
        
        .card__icon.blue {
            background-color: #3a7bd5; /* Couleur de la carte "Organisme" */
        }

        .card__icon.orange {
            background-color: var(--primary-color); /* Couleur de la carte "Enseignement sup" */
        }

        .card__content h3 {
            margin: 0;
            font-weight: 600;
        }

        .card__content p {
            margin: 0.25rem 0 0 0;
            font-size: 0.875rem;
            color: var(--light-text-color);
        }

        .card__arrow {
            margin-left: auto;
            color: #ccc;
        }

        .visual-section img {
            width: 100%;
            height: auto;
            border-radius: 1.5rem;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
        }

        /* --- Menu mobile --- */
        .menu-toggle {
            display: none;
        }

        .mobile-nav {
            display: none;
        }

        @media (max-width: 768px) {
            .header {
                padding: 1rem;
            }

            .header__nav, .header__icons {
                display: none;
            }

            .header__icons .menu-toggle {
                display: block;
            }

            .header__icons {
                display: flex;
            }

            .mobile-nav {
                display: none;
                flex-direction: column;
                background-color: var(--white);
                box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
                border-bottom-left-radius: 1.5rem;
                border-bottom-right-radius: 1.5rem;
                position: absolute;
                top: 4.5rem;
                left: 0;
                width: 100%;
                z-index: 10;
            }
            
            .mobile-nav a {
                padding: 1rem;
                text-decoration: none;
                color: var(--text-color);
                text-align: center;
                border-bottom: 1px solid #eee;
            }

            .hero-section {
                flex-direction: column;
                padding: 2rem 1rem;
            }

            .hero-section__title {
                font-size: 2.5rem;
            }
        }

        /* --- Sections de contenu --- */
        .section {
            padding: 4rem 3rem;
            text-align: center;
        }

        .section-title {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: var(--primary-color);
        }

        .section-subtitle {
            font-size: 1.5rem;
            color: var(--light-text-color);
            margin-bottom: 2rem;
        }

        .platform-section {
            background-color: var(--background-color);
        }
        
        .platform-section .content-container {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .platform-section .content-container .text-content {
            flex: 1;
            text-align: left;
        }

        .platform-section .content-container .text-content h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .platform-section .content-container .text-content p {
            line-height: 1.6;
            color: var(--light-text-color);
        }
        
        .platform-section .content-container .text-content ul {
            list-style: none;
            padding: 0;
            margin-top: 1rem;
        }

        .platform-section .content-container .text-content li {
            margin-bottom: 0.5rem;
            color: var(--light-text-color);
        }

        .platform-section .content-container .text-content li i {
            color: var(--primary-color);
            margin-right: 0.5rem;
        }

        .platform-section .content-container .image-content {
            flex: 1;
        }

        .platform-section .content-container img {
            width: 100%;
            height: auto;
            border-radius: 1rem;
        }
        
        .features-section {
            padding: 4rem 3rem;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .feature-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }

        .feature-item .icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }

        .feature-item h4 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 0;
        }

        .feature-item p {
            font-size: 0.9rem;
            color: var(--light-text-color);
            margin-top: 0.5rem;
        }

        /* --- Footer --- */
        .footer {
            background-color: var(--dark-blue);
            color: var(--white);
            padding: 4rem 3rem;
            font-size: 0.9rem;
            line-height: 1.8;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-column h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .footer-column ul {
            list-style: none;
            padding: 0;
        }

        .footer-column a {
            color: var(--white);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .footer-column a:hover {
            color: var(--primary-color);
        }
        
        .footer-column li {
            margin-bottom: 0.5rem;
        }

        .footer-column i {
            margin-right: 0.5rem;
        }

        .footer-bottom {
            text-align: center;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        @media (max-width: 768px) {
            .footer {
                padding: 2rem 1rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .platform-section .content-container {
                flex-direction: column;
            }
        }