/* roulang page: index */
:root {
            --primary: #6320EE;
            --accent: #00F5D4;
            --pulse: #FF007A;
            --dark-surface: #0B0C10;
            --card-surface: #12141D;
            --text-main: #FFFFFF;
            --text-muted: #94A3B8;
            --border-glow: rgba(0, 245, 212, 0.25);
        }
        html { scroll-behavior: smooth; }
        body { background-color: var(--dark-surface); color: var(--text-main); }
        .hero-glow-btn {
            box-shadow: 0 0 25px rgba(0, 245, 212, 0.35);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .hero-glow-btn:hover {
            box-shadow: 0 0 35px rgba(0, 245, 212, 0.6);
            transform: translateY(-2px);
        }
        .interactive-card {
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.3s ease;
        }
        .interactive-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 8px 30px -4px rgba(99, 32, 238, 0.35);
            transform: translateY(-3px);
        }
        .glass-nav {
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            background: rgba(11, 12, 16, 0.88);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .code-window {
            background: #0d1117;
            border: 1px solid #30363d;
            font-family: 'JetBrains Mono', monospace;
        }