:root{--bg:#0d1117;--surface:#161b22;--surface-2:#21262d;--border:#30363d;--primary:#58a6ff;--text:#e6edf3;--text-muted:#8b949e;--danger:#f85149;--radius:8px;--radius-lg:12px;--nav-height:60px}*,:after,:before{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;min-height:100vh}a{color:var(--primary);text-decoration:none}a:hover{opacity:.8}button{cursor:pointer;font-family:inherit}img{display:block;max-width:100%}h1,h2,h3{color:var(--text);line-height:1.3}input,textarea{font-family:inherit}