:root {
  --bg: #f6f7fb; --fg: #1d2330; --muted: #6b7385; --card: #fff; --line: #e2e5ee;
  --accent: #3355ff; --good: #1f9d55; --bad: #d64545; --warn: #b7791f;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "PingFang TC", "Microsoft JhengHei", sans-serif; }
main { max-width: 480px; margin: 0 auto; padding: 16px; }
main.wide { max-width: 900px; }
h1 { margin: 8px 0 16px; }
a { color: var(--accent); }
.muted { color: var(--muted); font-size: 14px; }

input:not([type]), input[type=text] { width: 100%; padding: 12px; font-size: 16px;
  border: 1px solid var(--line); border-radius: 10px; margin-bottom: 8px; }
button, .button { display: inline-block; padding: 12px 18px; font-size: 16px; border: 0;
  border-radius: 10px; background: var(--accent); color: #fff; cursor: pointer; text-align: center; }
.secondary { background: var(--card); color: var(--fg); border: 1px solid var(--line); }
.buttons { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.buttons > * { flex: 1; }
#joinForm button { width: 100%; }

.scorecard { background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 16px; text-align: center; }
.big { font-size: 56px; font-weight: 700; line-height: 1.1; }
#reader { margin-top: 12px; border-radius: 12px; overflow: hidden; }

.msg { margin-top: 12px; padding: 12px; border-radius: 10px; font-weight: 600; text-align: center; }
.msg.good { background: #e3f6eb; color: var(--good); }
.msg.bad { background: #fbe7e7; color: var(--bad); }
.msg.warn { background: #fdf3e1; color: var(--warn); }
.msg.trap { background: #f1e6fb; color: #7b2cbf; }
.lockbox { margin-top: 12px; padding: 20px; border-radius: 14px; text-align: center;
  background: #7b2cbf; color: #fff; font-weight: 700; }
button:disabled, .button.disabled { opacity: .4; pointer-events: none; }

table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 12px; overflow: hidden; }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
td:nth-child(3) { font-weight: 700; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.card { background: #fff; color: #000; border: 1px dashed #999; border-radius: 8px; padding: 16px;
  display: flex; flex-direction: column; align-items: center; break-inside: avoid; }
.card .qr { width: 220px; background: #fff; } /* SVG 自帶 4 格標準白邊 */
.card .qr svg { display: block; width: 100%; height: auto; }
.card .label { margin-top: 8px; font-weight: 700; font-size: 18px; }
.card .label, .card .points { display: none; }
.show-labels .card .label, .show-points .card .points { display: block; }

@media (prefers-color-scheme: dark) {
  :root { --bg: #14171f; --fg: #e8eaf0; --muted: #9aa1b2; --card: #1e222c; --line: #2e3442; }
  .msg.good { background: #143222; } .msg.bad { background: #3a1919; } .msg.warn { background: #392d14; }
  .msg.trap { background: #2c1a3d; color: #d4a6ff; }
}
@media print {
  .noprint { display: none; }
  body { background: #fff; }
  main.wide { max-width: none; padding: 0; }
}