/* roulang page: index */
:root {
            --primary: #059669;
            --primary-light: #10b981;
            --secondary: #0f766e;
            --bg-main: #f8fafc;
            --text-dark: #0f172a;
            --text-muted: #64748b;
        }
        html { scroll-behavior: smooth; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background-color: var(--bg-main); color: #334155; }
        .glass-header { backdrop-filter: blur(12px); background-color: rgba(255, 255, 255, 0.92); }
        .hero-overlay { background: linear-gradient(135deg, rgba(11, 19, 43, 0.92) 0%, rgba(6, 78, 59, 0.85) 100%); }
        .tech-card { transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
        .tech-card:hover { transform: translateY(-4px); box-shadow: 0 20px 25px -5px rgba(16, 185, 129, 0.12), 0 10px 10px -5px rgba(16, 185, 129, 0.04); }
        details summary::-webkit-details-marker { display: none; }