:root{--bg:#0e0f13;--surface:#16181f;--surface-2:#1e212b;--border:#2a2e3a;--text:#eef1f6;--muted:#9aa3b2;--accent:#c8862a;--danger:#d0433a;--radius:12px}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}body,button,html{color:var(--text)}button{font:inherit;cursor:pointer;border:none;border-radius:10px;padding:12px 20px;background:var(--surface-2);transition:filter .15s ease,opacity .15s ease}button:hover:not(:disabled){filter:brightness(1.15)}button:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent);color:#1a1204;font-weight:600}.btn-danger{background:var(--danger);color:#fff;font-weight:600}.center-screen{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;padding:24px;text-align:center}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;max-width:460px;width:100%}.muted{color:var(--muted)}