/* Variables CSS pour le thème sombre */
        :root {
            --bg-primary: #121212;
            --bg-secondary: #1e1e1e;
            --bg-tertiary: #2d2d2d;
            --text-primary: #e0e0e0;
            --text-secondary: #a0a0a0;
            --accent-color: #4dabf7;
            --accent-hover: #339af0;
            --border-color: #404040;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
            --transition: all 0.3s ease;
        }

        /* Styles généraux */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            scroll-behavior: smooth;
        }

        body, html {
            height: 100%;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            overflow-x: hidden;
        }

        /* Barre de navigation fixe */
        header {
            background-color: var(--bg-secondary);
            color: var(--text-primary);
            padding: 15px 5%;
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 100;
            box-shadow: var(--shadow);
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo i {
            color: var(--accent-color);
            font-size: 1.5rem;
        }

        .navbar {
            display: flex;
            gap: 15px;
        }

        .navbar a {
            color: var(--text-primary);
            text-decoration: none;
            padding: 8px 16px;
            background-color: var(--bg-tertiary);
            border-radius: 6px;
            font-weight: 500;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .navbar a:hover {
            background-color: var(--accent-color);
            transform: translateY(-2px);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Conteneur principal */
        .main-container {
            display: flex;
            flex-direction: column;
            height: 100vh;
            overflow-y: auto;
            margin-top: 80px;
        }

        /* Section générale */
        .section {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            padding: 40px 20px;
            background-color: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .section:nth-child(even) {
            background-color: var(--bg-secondary);
        }

        .section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-color), transparent);
        }

        .section h2 {
            font-size: 2.5rem;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }

        .section h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background-color: var(--accent-color);
        }

        .section p {
            color: var(--text-secondary);
            font-size: 1.2rem;
            max-width: 700px;
            line-height: 1.6;
            margin-bottom: 30px;
            z-index: 1;
        }

        /* Style pour les boutons */
        .btn {
            padding: 12px 28px;
            font-size: 1rem;
            background-color: transparent;
            color: var(--accent-color);
            border: 2px dashed var(--accent-color);
            border-radius: 8px;
            cursor: pointer;
            outline: none;
            text-align: center;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(77, 171, 247, 0.2), transparent);
            transition: left 0.5s;
            z-index: -1;
        }

        .btn:hover {
            background-color: var(--accent-color);
            color: white;
            border-color: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(77, 171, 247, 0.3);
        }

        .btn:hover::before {
            left: 100%;
        }

        .btn:focus {
            box-shadow: 0 0 0 3px rgba(77, 171, 247, 0.5);
        }

        /* Pied de page */
        footer {
            background-color: var(--bg-secondary);
            color: var(--text-primary);
            padding: 20px;
            text-align: center;
            position: relative;
            width: 100%;
            margin-top: auto;
        }

        footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-color), transparent);
        }

        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .section > * {
            animation: fadeInUp 0.6s ease forwards;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            header {
                padding: 15px 20px;
            }
            
            .navbar {
                position: fixed;
                top: 70px;
                right: -100%;
                flex-direction: column;
                background-color: var(--bg-secondary);
                width: 70%;
                height: calc(100vh - 70px);
                padding: 20px;
                transition: right 0.3s ease;
                box-shadow: -5px 0 15px rgba(0, 0, 0, 0.2);
                z-index: 99;
            }
            
            .navbar.active {
                right: 0;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .section h2 {
                font-size: 2rem;
            }
            
            .section p {
                font-size: 1rem;
                padding: 0 10px;
            }
            
            .btn {
                padding: 10px 20px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 480px) {
            .logo h1 {
                font-size: 1.3rem;
            }
            
            .section h2 {
                font-size: 1.8rem;
            }
            
            .section p {
                font-size: 0.9rem;
            }
        }

        /* Mode sombre par défaut */
        body {
            background-color: var(--bg-primary);
            color: var(--text-primary);
        }