:root {
            /* Palette "Blanc Technique" & "Bleu Mental" copiée de ton index pour le mobile */
            --bg-white: #ffffff;
            --bg-light: #f4f7f9;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --blue-mental: #0ea5e9; 
            --blue-deep: #0f172a; 
            --blue-accent: #2563eb; 
            --danger: #ef4444;
        }

        body {
            font-family: 'Inter', sans-serif;
            margin: 0;
            padding: 0;
            background-color: var(--bg-white);
            color: var(--text-main);
            line-height: 1.6;
        }

        /* --- ZONE HÉROS (HAUT DE PAGE) --- */
        .hero-section {
            background: linear-gradient(135deg, var(--bg-light) 0%, #ffffff 100%);
            padding: 80px 20px;
            text-align: center;
            border-bottom: 1px solid #e2e8f0;
        }
        
        .hero-section h1 {
            font-size: 42px;
            font-weight: 800;
            color: var(--blue-deep);
            margin-bottom: 15px;
            line-height: 1.2;
            letter-spacing: 1px;
        }
        
        .hero-section h2 {
            font-size: 20px;
            color: var(--text-muted);
            font-weight: 400;
            margin-bottom: 30px;
        }
        
        .intro-text p {
            font-size: 18px;
            color: var(--text-main);
            max-width: 800px;
            margin: 0 auto;
        }

        /* Boutons d'action */
        .action-buttons {
            display: flex;
            gap: 15px;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 40px;
        }
        
        .btn-download {
            background-color: var(--danger);
            color: white;
            padding: 16px 35px;
            font-size: 18px;
            font-weight: 600;
            text-decoration: none;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
            transition: transform 0.2s, background-color 0.2s;
        }
        .btn-download:hover { background-color: #dc2626; transform: translateY(-2px); }

        .btn-secondary {
            background-color: var(--bg-white);
            color: var(--blue-deep);
            border: 2px solid var(--blue-deep);
            padding: 16px 35px;
            font-size: 18px;
            font-weight: 600;
            text-decoration: none;
            border-radius: 8px;
            transition: transform 0.2s, background-color 0.2s, color 0.2s;
        }
        .btn-secondary:hover { background-color: var(--blue-deep); color: white; transform: translateY(-2px); }

        /* --- GUIDE D'INSTALLATION --- */
        .guide-section {
            max-width: 900px;
            margin: 0 auto;
            padding: 60px 20px;
        }
        
        .guide-section h2 {
            text-align: center;
            font-size: 32px;
            color: var(--blue-deep);
            margin-bottom: 50px;
        }

        .step-block {
            background: var(--bg-white);
            border: 1px solid #e2e8f0;
            border-left: 5px solid var(--blue-mental);
            padding: 30px;
            margin-bottom: 30px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
        }
        
        .step-block h3 {
            margin-top: 0;
            color: var(--blue-deep);
            font-size: 22px;
            border-bottom: 1px solid #e2e8f0;
            padding-bottom: 10px;
            margin-bottom: 20px;
        }
        
        .step-block ul, .step-block ol {
            color: var(--text-main);
            font-size: 16px;
            padding-left: 20px;
        }
        
        .step-block li {
            margin-bottom: 12px;
        }

        /* Boîte d'Alerte */
        .alert-box.warning {
            background-color: rgba(239, 68, 68, 0.05);
            border: 1px solid rgba(239, 68, 68, 0.2);
            border-left: 5px solid var(--danger);
            padding: 25px;
            margin-top: 25px;
            border-radius: 8px;
        }
        
        .alert-box.warning h4 {
            color: var(--danger);
            margin-top: 0;
            font-size: 20px;
            margin-bottom: 15px;
        }
        
        .alert-box.warning p, .alert-box.warning ol {
            color: var(--text-main);
        }

        /* Tableau de Comparaison */
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 25px;
            background: var(--bg-white);
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 6px rgba(0,0,0,0.05);
        }
        
        .comparison-table th, .comparison-table td {
            border: 1px solid #e2e8f0;
            padding: 15px 20px;
            text-align: left;
        }
        
        .comparison-table th {
            background-color: var(--blue-deep);
            color: white;
            font-weight: 600;
            font-size: 16px;
        }
        
        .comparison-table td {
            color: var(--text-main);
        }

        /* Liste des Icônes */
        .icon-list {
            list-style: none;
            padding: 0;
        }
        
        .icon-list li {
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            color: var(--text-main);
            background: var(--bg-light);
            padding: 15px;
            border-radius: 8px;
            border: 1px solid #e2e8f0;
        }
        
        .inline-icon {
            width: 40px;
            height: 40px;
            margin-right: 20px;
            filter: drop-shadow(0px 2px 4px rgba(0,0,0,0.1));
        }

        hr {
            border: 0;
            height: 1px;
            background: #e2e8f0;
            margin: 0;
        }

        /* Pied de page */
        footer {
            background-color: var(--bg-white);
            padding: 40px 20px;
            text-align: center;
        }
        
        .btn-forum {
            color: var(--blue-mental);
            text-decoration: none;
            font-weight: 600;
            font-size: 18px;
            display: inline-block;
            margin-bottom: 20px;
            transition: color 0.2s;
        }
        
        .btn-forum:hover {
            color: var(--blue-accent);
            text-decoration: underline;
        }
        
        .copyright {
            color: var(--text-muted);
            font-size: 14px;
            margin: 0;
        }