:root{--bg: #ffffff;--panel: #f6f8fa;--text: #24292f;--muted: #57606a;--brand: #0969da;--brand-2: #1a7f37;--ring: #0969da;--shadow: 0 4px 16px rgba(0,0,0,.08)}html,body{height:100%}body{background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;margin:0}.card{background:var(--panel);border:1px solid rgba(0,0,0,.06);border-radius:16px}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.6rem 1rem;border-radius:10px;border:1px solid rgba(0,0,0,.12);color:var(--text);text-decoration:none}.btn.primary{background:#0969da;color:#fff;border-color:#0969da}.btn:hover{box-shadow:var(--shadow)}.container{max-width:1200px;margin:0 auto;padding:0 16px}