/* roulang page: index */
:root {
            --bg-main: #0A0D14;
            --bg-card: #111622;
            --cyan-glow: rgba(0, 242, 254, 0.3);
            --purple-glow: rgba(127, 0, 255, 0.25);
            --border-dim: rgba(255, 255, 255, 0.08);
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-main);
            color: #94A3B8;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }
        .tech-grid-bg {
            background-image: radial-gradient(rgba(0, 242, 254, 0.08) 1px, transparent 1px), radial-gradient(rgba(79, 172, 254, 0.04) 1px, transparent 1px);
            background-size: 32px 32px;
            background-position: 0 0, 16px 16px;
        }
        .glow-box-cyan {
            box-shadow: 0 0 20px var(--cyan-glow);
        }
        .glow-box-purple {
            box-shadow: 0 0 20px var(--purple-glow);
        }
        .glow-text-cyan {
            text-shadow: 0 0 10px rgba(0, 242, 254, 0.6);
        }
        .neon-border {
            border: 1px solid var(--border-dim);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .neon-border:hover {
            border-color: #00F2FE;
            box-shadow: 0 0 16px rgba(0, 242, 254, 0.2);
            transform: translateY(-4px);
        }
        details summary::-webkit-details-marker {
            display: none;
        }