/* roulang page: index */
:root {
            --bg-deep: #060a17;
            --bg-card: rgba(15, 23, 42, 0.75);
            --border-glow: rgba(0, 240, 255, 0.2);
            --neon-blue: #00f0ff;
            --electric-blue: #3b82f6;
        }

        body {
            background-color: var(--bg-deep);
            color: #e2e8f0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
        }

        .glass-panel {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .glass-panel-glow {
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(0, 240, 255, 0.3);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.15);
        }

        .glow-button {
            background: linear-gradient(135deg, #00f0ff 0%, #3b82f6 100%);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.45);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .glow-button:hover {
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.75);
            transform: translateY(-2px) scale(1.02);
        }

        .glow-button:active {
            transform: translateY(0) scale(0.98);
        }

        .glow-border {
            border: 1px solid var(--border-glow);
            box-shadow: inset 0 0 15px rgba(0, 240, 255, 0.05);
        }

        .glow-border:hover {
            border-color: rgba(0, 240, 255, 0.5);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
        }

        .text-glow {
            text-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
        }

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