/* roulang page: index */
:root {
            --bg-deep: #040711;
            --primary-glow: rgba(59, 130, 246, 0.35);
            --cyan-glow: rgba(6, 182, 212, 0.4);
        }
        body {
            background-color: var(--bg-deep);
            color: #cbd5e1;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
        }
        .glass-panel {
            background: rgba(15, 23, 42, 0.65);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(51, 65, 85, 0.6);
        }
        .glass-panel:hover {
            border-color: rgba(59, 130, 246, 0.6);
            box-shadow: 0 0 25px rgba(59, 130, 246, 0.15);
        }
        .glow-btn {
            background: linear-gradient(135deg, #2563eb, #06b6d4);
            box-shadow: 0 0 20px rgba(37, 99, 235, 0.45);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glow-btn:hover {
            box-shadow: 0 0 30px rgba(6, 182, 212, 0.65);
            transform: translateY(-2px);
        }
        .bg-grid-pattern {
            background-size: 40px 40px;
            background-image: 
                linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
        }