/* roulang page: index */
:root {
            --primary-glow: rgba(0, 242, 254, 0.25);
            --violet-glow: rgba(127, 0, 255, 0.25);
        }
        html { scroll-behavior: smooth; }
        body {
            background-color: #0a0b0e;
            color: #f8fafc;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
        }
        .text-glow {
            text-shadow: 0 0 20px var(--primary-glow);
        }
        .box-glow {
            box-shadow: 0 0 35px rgba(0, 242, 254, 0.12);
        }
        .card-cyber {
            background: linear-gradient(180deg, rgba(26, 29, 36, 0.8) 0%, rgba(18, 20, 26, 0.95) 100%);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(12px);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-cyber:hover {
            border-color: rgba(0, 242, 254, 0.45);
            box-shadow: 0 10px 30px rgba(0, 242, 254, 0.18);
            transform: translateY(-4px);
        }
        .btn-gradient {
            background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
            color: #07090e;
            font-weight: 700;
            transition: all 0.25s ease;
        }
        .btn-gradient:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 25px rgba(0, 242, 254, 0.45);
            transform: translateY(-1px);
        }
        .btn-ghost {
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(8px);
            transition: all 0.25s ease;
        }
        .btn-ghost:hover {
            border-color: #00f2fe;
            color: #00f2fe;
            background: rgba(0, 242, 254, 0.08);
        }
        .video-overlay-gradient {
            background: radial-gradient(circle at center, rgba(10, 11, 14, 0.4) 0%, rgba(10, 11, 14, 0.92) 80%);
        }