:root{--bg:#0f1419;--surface:#1a2332;--text:#f0f4f8;--muted:#8b9cb3;--primary:#3182f6;--primary-hover:#2563eb;--danger:#ef4444;--radius:12px}*{box-sizing:border-box}body,html{margin:0;padding:0;min-height:100%;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}a{color:var(--primary)}button{cursor:pointer}button,input{font-family:inherit}