:root{--bg: #0e1116;--card: #171b22;--fg: #f2f4f8;--muted: #9aa3b2;--line: #2a303a;--accent: #3b82f6;--on-accent: #fff;--err: #ff8a80;color-scheme:dark light}@media(prefers-color-scheme:light){:root{--bg: #f3f5f9;--card: #fff;--fg: #12161c;--muted: #5b6575;--line: #d8dde6;--err: #b3261e}}*{box-sizing:border-box}html,body{margin:0;min-height:100%}body{background:var(--bg);color:var(--fg);font:16px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;display:grid;place-items:center;padding:16px;padding-top:max(16px,env(safe-area-inset-top))}.card{width:100%;max-width:400px;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:28px 20px 24px}.brand{text-align:center;margin-bottom:20px}.mark{width:72px;height:72px;margin:0 auto 14px;border-radius:18px;display:grid;place-items:center;background:var(--accent);color:var(--on-accent);font-weight:800;letter-spacing:.04em;font-size:22px}.logo{display:block;margin:0 auto 14px;width:72px;height:72px;object-fit:contain;border-radius:16px}h1{font-size:22px;line-height:1.2;margin:0 0 6px}.sub{color:var(--muted);margin:0}label{display:block;font-weight:600;margin-bottom:8px}input{width:100%;font:inherit;font-size:28px;font-weight:700;text-align:center;letter-spacing:.3em;text-transform:uppercase;padding:12px;color:var(--fg);background:transparent;border:2px solid var(--line);border-radius:12px}input:focus{outline:none;border-color:var(--accent)}button{width:100%;margin-top:14px;padding:14px;font:inherit;font-weight:700;color:var(--on-accent);background:var(--accent);border:0;border-radius:12px;cursor:pointer;min-height:48px}button:disabled{opacity:.5;cursor:default}.msg{min-height:1.5em;margin:16px 0 0;text-align:center;color:var(--muted)}.msg.erro{color:var(--err);font-weight:600}.busy{display:flex;justify-content:center;margin-top:8px}.spin{width:26px;height:26px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--accent);animation:giro .9s linear infinite}[hidden]{display:none!important}@keyframes giro{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.spin{animation-duration:3s}}