/* roulang page: index */
:root {
            --bg-dark: #121212;
            --accent-green: #CCFF00;
            --text-main: #FFFFFF;
            --text-dim: #A0A0A0;
            --border-color: #333333;
            --card-bg: #1A1A1A;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'Helvetica Neue', Arial, sans-serif; background-color: var(--bg-dark); color: var(--text-main); line-height: 1.6; font-size: 16px; }
        
        /* Layout */
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        section { padding: 100px 0; }
        
        /* Typography */
        h1, h2, h3 { line-height: 1.2; margin-bottom: 20px; }
        h1 { font-size: 3.5rem; font-weight: 800; }
        h2 { font-size: 2.5rem; }
        p { color: var(--text-dim); margin-bottom: 20px; }

        /* Header */
        header { padding: 20px 0; border-bottom: 1px solid var(--border-color); position: sticky; top: 0; background: rgba(18,18,18,0.95); z-index: 1000; }
        .nav-inner { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 1.5rem; font-weight: bold; color: var(--text-main); text-decoration: none; }
        .nav-links { display: flex; gap: 30px; list-style: none; }
        .nav-links a { color: var(--text-main); text-decoration: none; font-size: 0.9rem; }

        /* Buttons */
        .btn { padding: 12px 30px; background: var(--accent-green); color: #000; text-decoration: none; font-weight: bold; border-radius: 4px; display: inline-block; transition: var(--transition); border: none; cursor: pointer; }
        .btn:hover { background: #fff; transform: translateY(-2px); }

        /* Cards */
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .card { background: var(--card-bg); padding: 40px; border: 1px solid var(--border-color); border-radius: 4px; transition: var(--transition); }
        .card:hover { transform: translateY(-5px); border-color: var(--accent-green); }

        /* Utilities */
        .text-center { text-align: center; }
        .bg-gray { background: #0A0A0A; }
        
        /* Responsive */
        @media (max-width: 768px) {
            .grid-3 { grid-template-columns: 1fr; }
            h1 { font-size: 2rem; }
            .nav-links { display: none; }
        }

        /* Footer */
        footer { padding: 60px 0; border-top: 1px solid var(--border-color); text-align: center; color: var(--text-dim); font-size: 0.8rem; }