:root{--bg:#f5f6f8;--card:#fff;--fg:#1d2330;--muted:#677084;--accent:#1f5eff;--err:#b42318;--line:#e3e6ec}
@media (prefers-color-scheme:dark){:root{--bg:#12151b;--card:#1b2029;--fg:#e8ebf1;--muted:#98a1b3;--accent:#6d95ff;--err:#ff8a7a;--line:#2b313d}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif}
.card{max-width:440px;margin:6vh auto;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:28px 24px}
@media (max-width:480px){.card{margin:0;border-radius:0;min-height:100vh;padding:24px 16px}}
header{display:flex;justify-content:space-between;gap:8px;font-size:13px;color:var(--muted);margin-bottom:18px;flex-wrap:wrap}
.brand{font-weight:600;color:var(--fg)}h1{font-size:22px;margin:0 0 8px}h2{font-size:15px;margin:22px 0 6px}
p{margin:0 0 14px}.muted{color:var(--muted);font-size:14px}.msg{color:var(--err);min-height:1.5em;font-size:14px}
button{font:inherit;padding:10px 14px;border-radius:9px;border:1px solid var(--line);background:transparent;color:var(--fg);cursor:pointer}
button.primary{width:100%;background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}
button:disabled{opacity:.5;cursor:default}button.link{border:0;padding:0;color:var(--accent);font-size:14px}
input{font:inherit;width:100%;padding:10px 12px;border-radius:9px;border:1px solid var(--line);background:transparent;color:var(--fg);margin-bottom:12px;letter-spacing:.1em}
input[type=checkbox]{width:auto;margin:0 6px 0 0}.check{display:flex;align-items:center;margin:12px 0;font-size:14px}
.alt{margin-top:16px;display:flex;flex-direction:column;gap:8px;font-size:14px}a{color:var(--accent)}
.qr{display:block;width:200px;height:200px;margin:8px auto 12px;background:#fff;padding:6px;border-radius:8px}
code{word-break:break-all}.codes{columns:2;font-family:ui-monospace,Menlo,monospace;font-size:15px;padding-left:24px}
.list{list-style:none;padding:0;margin:0 0 8px}.list li{display:flex;justify-content:space-between;align-items:center;padding:8px 0;border-bottom:1px solid var(--line)}
hr{border:0;border-top:1px solid var(--line);margin:22px 0}footer{margin-top:20px;font-size:13px}footer a{color:var(--muted)}