:root{--bg:#F8F5F0;--ink:#1E1B18;--muted:#5b544c;--card:#fff;--line:#e4ddd2;--accent:#102D35;--accent-ink:#fff;--warn:#8a2c0d;--warn-bg:#fbeee8}
@media (prefers-color-scheme:dark){:root{--bg:#0f1416;--ink:#ece7df;--muted:#b3aca2;--card:#172025;--line:#2a363c;--accent:#d9c7a3;--accent-ink:#102D35;--warn:#ffb59a;--warn-bg:#3a2119}}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Arial,sans-serif;padding:16px}
main{width:100%;max-width:420px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:32px 28px}
.mark{display:block;width:44px;height:44px;margin:0 0 20px}
h1{font-size:1.4rem;margin:0 0 8px}
p{margin:0 0 16px;color:var(--muted)}
.note{background:var(--warn-bg);color:var(--warn);border-radius:8px;padding:10px 12px;margin:0 0 16px}
.button{display:block;width:100%;text-align:center;background:var(--accent);color:var(--accent-ink);border:0;border-radius:10px;padding:12px 16px;font:inherit;font-weight:600;text-decoration:none;cursor:pointer}
.button:focus-visible,input:focus-visible{outline:3px solid #d08a2e;outline-offset:2px}
label{display:block;font-weight:600;margin:0 0 6px}
input{display:block;width:100%;font:inherit;font-size:1.4rem;letter-spacing:.3em;text-align:center;direction:ltr;padding:10px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);margin:0 0 16px}
.qr{display:flex;justify-content:center;background:#fff;border-radius:10px;padding:12px;margin:0 0 16px}
.qr svg{width:200px;height:200px}
.key{direction:ltr;text-align:center;font-family:ui-monospace,Consolas,monospace;font-size:1rem;letter-spacing:.08em;background:var(--bg);border-radius:8px;padding:8px;margin:0 0 16px;word-break:break-all}
.small{font-size:.9rem}
.button.secondary{background:transparent;color:var(--ink);border:1px solid var(--line);margin:0 0 16px}
a{color:inherit}