/* roulang page: index */
:root {
            --primary: #1D4ED8;
            --primary-hover: #1E40AF;
            --accent: #0284C7;
            --slate-text: #0F172A;
            --body-text: #334155;
            --muted-text: #64748B;
            --border-color: #E2E8F0;
            --bg-light: #F8FAFC;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--body-text);
            background-color: #FFFFFF;
        }
        .hero-bg-overlay {
            background: linear-gradient(135deg, rgba(255,255,255,0.92) 0%, rgba(248,250,252,0.85) 100%);
        }
        .deep-dark-bg {
            background-color: #0B132B;
        }
        .card-custom {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.04);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 35px -5px rgba(29, 78, 216, 0.08);
        }
        .before-after-slider {
            position: relative;
            overflow: hidden;
        }
        .before-after-slider img {
            width: 100%;
            display: block;
        }
        .before-after-overlay {
            position: absolute;
            top: 0;
            left: 0;
            height: 100%;
            width: 50%;
            overflow: hidden;
            border-right: 2px solid #FFFFFF;
            box-shadow: 2px 0 10px rgba(0,0,0,0.3);
        }
        .before-after-overlay img {
            width: 200%;
            max-width: none;
            height: 100%;
            object-fit: cover;
        }
        @media (max-width: 768px) {
            .mobile-hide { display: none !important; }
        }