:root{--bg: #f6f6f8;--card: #fff;--ink: #1b1b1f;--muted: #5d5d66;--accent: #5b3fd6;--error: #b3261e}@media(prefers-color-scheme:dark){:root{--bg: #131316;--card: #1d1d22;--ink: #ececf1;--muted: #a0a0ab;--accent: #a891ff;--error: #ff8a80}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,sans-serif}.card{max-width:420px;margin:8vh auto;padding:32px;background:var(--card);border-radius:12px}h1{font-size:1.4rem;margin-top:0}label{display:block;margin-top:16px;font-weight:600}input{width:100%;padding:10px;margin-top:4px;border:1px solid #8884;border-radius:8px;background:transparent;color:inherit;font:inherit}button{margin-top:20px;width:100%;padding:10px;border:0;border-radius:8px;background:var(--accent);color:#fff;font:inherit;font-weight:600;cursor:pointer}[role=alert]{color:var(--error)}.hint{color:var(--muted);font-size:.9rem}.codes{columns:2;font-size:1.05rem}.secret{word-break:break-all}table{width:100%;border-collapse:collapse}td,th{text-align:left;padding:6px;border-bottom:1px solid #8883}