/* roulang page: index */
:root {
            --bg-deep: #070B14;
            --bg-card: rgba(16, 26, 51, 0.7);
            --border-glow: rgba(0, 210, 255, 0.2);
            --brand-glow: #00D2FF;
            --accent-green: #00F5A0;
        }

        body {
            background-color: var(--bg-deep);
            color: #E2E8F0;
            overflow-x: hidden;
        }

        .glass-panel {
            background: rgba(15, 26, 54, 0.75);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
        }

        .glass-panel-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glass-panel-hover:hover {
            border-color: rgba(0, 210, 255, 0.4);
            transform: translateY(-4px);
            box-shadow: 0 12px 36px rgba(0, 210, 255, 0.15);
        }

        .btn-glow {
            background: linear-gradient(135deg, #1C64F2 0%, #00D2FF 100%);
            box-shadow: 0 0 20px rgba(0, 210, 255, 0.35);
            transition: all 0.3s ease;
        }
        .btn-glow:hover {
            box-shadow: 0 0 32px rgba(0, 210, 255, 0.75);
            transform: translateY(-2px);
        }

        .btn-outline-glow {
            border: 1px solid rgba(0, 210, 255, 0.5);
            box-shadow: inset 0 0 12px rgba(0, 210, 255, 0.15);
            transition: all 0.3s ease;
        }
        .btn-outline-glow:hover {
            border-color: #00D2FF;
            background: rgba(0, 210, 255, 0.1);
            box-shadow: 0 0 20px rgba(0, 210, 255, 0.35);
        }

        .pulse-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--accent-green);
            box-shadow: 0 0 10px var(--accent-green);
            animation: pulse-animation 2s infinite;
        }
        @keyframes pulse-animation {
            0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 245, 160, 0.7); }
            70% { transform: scale(1.1); box-shadow: 0 0 0 8px rgba(0, 245, 160, 0); }
            100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 245, 160, 0); }
        }

        .text-glow {
            text-shadow: 0 0 18px rgba(0, 210, 255, 0.5);
        }

        .nav-link {
            position: relative;
            transition: color 0.3s ease;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 50%;
            width: 0;
            height: 2px;
            background: #00D2FF;
            transition: all 0.3s ease;
            transform: translateX(-50%);
        }
        .nav-link:hover::after {
            width: 100%;
        }

        details summary::-webkit-details-marker {
            display: none;
        }