:root{--bg: #0b0e14;--surface: #161b22;--text: #c9d1d9;--text-white: #ffffff;--primary: #58a6ff;--border: #30363d;--radius: 6px}body{background-color:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;margin:0;padding:0}.site-shell{max-width:1100px;margin:0 auto;padding:60px 20px}.topnav{display:flex;justify-content:space-between;margin-bottom:80px;align-items:center}.logo{font-weight:800;color:var(--text-white);font-size:1.2rem}.nav-links{display:flex;gap:20px}.nav-links a{color:var(--text);font-size:.9rem}.hero{margin-bottom:80px}h1{font-size:3.5rem;color:var(--text-white);margin:0 0 20px;line-height:1}.lead{font-size:1.2rem;color:#8b949e;max-width:700px;margin-bottom:30px}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:60px}.feature-card{background:var(--surface);border:1px solid var(--border);padding:30px;border-radius:var(--radius)}.feature-card h2{font-size:1.1rem;color:var(--text-white);margin-top:0}.feature-card p{font-size:.9rem;color:#8b949e;margin-bottom:0}.download-box{background:var(--surface);border:1px solid var(--border);padding:40px;border-radius:var(--radius);display:flex;justify-content:space-between;align-items:center}.btn-primary{background:#238636;color:#fff;padding:12px 24px;border-radius:4px;font-weight:600;text-decoration:none}