:root {
  --page: #f9f9f7; --surface: #fcfcfb; --ink: #0b0b0b; --ink-2: #52514e; --muted: #898781;
  --grid: #e1e0d9; --baseline: #c3c2b7; --border: rgba(11,11,11,0.10);
  --series-1: #2a78d6; --neg: #b3362f; --pos: #006300; --warn-bg: #fdf3e0; --warn-ink: #7a5300;
  --accent-bg: #eef4fc;
}
@media (prefers-color-scheme: dark) {
  :root {
    --page: #0d0d0d; --surface: #1a1a19; --ink: #ffffff; --ink-2: #c3c2b7; --muted: #898781;
    --grid: #2c2c2a; --baseline: #383835; --border: rgba(255,255,255,0.10);
    --series-1: #3987e5; --neg: #e66767; --pos: #0ca30c; --warn-bg: #33290f; --warn-ink: #fab219;
    --accent-bg: #16202e;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--page); color: var(--ink); font: 14px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 420px; margin: 8vh auto 40px; padding: 0 16px; }
main.wide { max-width: 860px; margin-top: 24px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 26px 28px; margin-bottom: 16px; }
h1 { font-size: 18px; margin: 0 0 4px; font-weight: 650; }
h2 { font-size: 15px; margin: 0 0 10px; font-weight: 650; }
.sub { color: var(--ink-2); font-size: 13px; margin: 0 0 18px; }
label { display: block; font-size: 12px; color: var(--ink-2); margin: 12px 0 4px; }
input { width: 100%; font: inherit; color: var(--ink); background: var(--page); border: 1px solid var(--baseline); border-radius: 7px; padding: 8px 10px; }
button { font: inherit; color: var(--ink); background: var(--surface); border: 1px solid var(--baseline); border-radius: 7px; padding: 7px 14px; cursor: pointer; margin-top: 16px; }
button:hover { background: var(--accent-bg); }
button:disabled { opacity: .5; cursor: default; }
button.primary { background: var(--series-1); border-color: var(--series-1); color: #fff; }
.err { color: var(--neg); font-size: 13px; margin-top: 12px; min-height: 18px; }
.ok { color: var(--pos); font-size: 13px; margin-top: 12px; }
.banner { margin: 0 0 16px; padding: 9px 14px; border-radius: 8px; background: var(--warn-bg); color: var(--warn-ink); font-size: 13px; border: 1px solid var(--border); }
.qr { display: block; margin: 14px 0 6px; border-radius: 6px; background: #fff; padding: 6px; }
code, .codes { font-family: ui-monospace, Consolas, monospace; font-size: 13px; }
.codes { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 20px; margin: 12px 0; padding: 12px 14px; background: var(--page); border: 1px solid var(--grid); border-radius: 7px; }
.topnav { display: flex; gap: 12px; align-items: center; padding: 14px 20px; border-bottom: 1px solid var(--grid); background: var(--surface); }
.topnav h1 { margin: 0 14px 0 0; font-size: 17px; }
.topnav a { color: var(--series-1); text-decoration: none; font-size: 13px; }
.topnav .spacer { flex: 1; }
.topnav button { margin-top: 0; }
table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
th, td { text-align: left; padding: 4px 8px; border-bottom: 1px solid var(--grid); white-space: nowrap; }
td.wrap { white-space: normal; }
th { color: var(--ink-2); font-weight: 600; }
.scroll { overflow: auto; max-height: 420px; }