:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #1d2330;
  --muted: #6b7280;
  --line: #e5e7eb;
  --brand: #06c755;
  --brand-dark: #05a647;
  --danger: #d93025;
  --warn: #b26a00;
  --radius: 10px;
  font-family: -apple-system, BlinkMacSystemFont, 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.5; }
a { color: var(--brand-dark); }
h1 { font-size: 20px; margin: 0 0 12px; }
h2 { font-size: 17px; margin: 0 0 12px; }
small, .muted { color: var(--muted); }
button, .btn {
  font: inherit; border: 1px solid var(--line); background: var(--card); color: var(--text);
  border-radius: 8px; padding: 7px 14px; cursor: pointer; text-decoration: none; display: inline-block;
}
button.primary, .btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
button.primary:hover, .btn.primary:hover { background: var(--brand-dark); }
button.danger { color: var(--danger); border-color: var(--danger); }
button:disabled { opacity: .5; cursor: not-allowed; }
input, select, textarea {
  font: inherit; border: 1px solid var(--line); border-radius: 8px; padding: 7px 10px; background: #fff; color: var(--text);
  max-width: 100%;
}
textarea { width: 100%; min-height: 120px; }

/* ---------- 單頁提示（LIFF、錯誤頁） ---------- */
.notice { max-width: 420px; margin: 18vh auto 0; padding: 28px 22px; background: var(--card); border-radius: var(--radius); text-align: center; }
.notice p { color: var(--muted); }
.spinner { width: 34px; height: 34px; border: 3px solid var(--line); border-top-color: var(--brand); border-radius: 50%; margin: 0 auto 14px; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.hidden { display: none !important; }

/* ---------- 後台 ---------- */
.topbar { display: flex; align-items: center; gap: 12px; padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 2; }
.topbar .title { font-weight: 700; }
.topbar .me { margin-left: auto; display: flex; align-items: center; gap: 8px; font-size: 14px; }
.avatar { width: 30px; height: 30px; border-radius: 50%; object-fit: cover; background: var(--line); flex: none; }
nav.tabs { display: flex; gap: 4px; padding: 8px 16px 0; overflow-x: auto; }
nav.tabs button { border: none; background: transparent; border-bottom: 2px solid transparent; border-radius: 0; padding: 8px 12px; white-space: nowrap; }
nav.tabs button.active { border-bottom-color: var(--brand); font-weight: 700; }
main.admin { max-width: 1100px; margin: 0 auto; padding: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 16px; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.stat .label { color: var(--muted); font-size: 13px; }
.stat .value { font-size: 26px; font-weight: 700; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 12px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--muted); font-weight: 600; white-space: nowrap; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.person { display: flex; align-items: center; gap: 8px; min-width: 160px; }
.chip { display: inline-block; padding: 1px 8px; margin: 2px 4px 2px 0; border-radius: 999px; background: #eef7f1; color: #116634; font-size: 12px; white-space: nowrap; }
.chip.first { background: #fff4e0; color: var(--warn); }
.badge { font-size: 12px; padding: 1px 8px; border-radius: 999px; white-space: nowrap; }
.badge.yes { background: #e6f6ec; color: #116634; }
.badge.no { background: #fdecea; color: var(--danger); }
.badge.unknown { background: #f1f3f4; color: var(--muted); }
.bars { display: flex; align-items: flex-end; gap: 2px; height: 120px; padding-top: 8px; }
.bars .bar { flex: 1; background: var(--brand); border-radius: 2px 2px 0 0; min-height: 1px; position: relative; }
.bars-axis { display: flex; justify-content: space-between; color: var(--muted); font-size: 12px; margin-top: 4px; }
.kv-row { display: flex; gap: 8px; margin-bottom: 8px; flex-wrap: wrap; }
.kv-row input { flex: 1; min-width: 120px; }
.linkbox { word-break: break-all; background: var(--bg); border: 1px dashed var(--line); border-radius: 8px; padding: 10px; font-family: ui-monospace, Consolas, monospace; font-size: 13px; }
.qr { width: 220px; height: 220px; margin-top: 12px; background: #fff; }
.tag-pick { display: flex; flex-wrap: wrap; gap: 6px; max-height: 220px; overflow-y: auto; padding: 4px 0; }
.tag-pick label { border: 1px solid var(--line); border-radius: 999px; padding: 3px 10px; cursor: pointer; font-size: 13px; }
.tag-pick input { margin: 0 4px 0 0; }
.alert { padding: 10px 12px; border-radius: 8px; margin: 10px 0; }
.alert.info { background: #eef4ff; }
.alert.error { background: #fdecea; color: var(--danger); }
.alert.ok { background: #e6f6ec; color: #116634; }
.pager { display: flex; gap: 8px; align-items: center; justify-content: flex-end; margin-top: 10px; }
.empty { color: var(--muted); text-align: center; padding: 24px; }
@media (max-width: 600px) {
  main.admin { padding: 12px; }
  .topbar .me span { display: none; }
}