:root {
  --bg: #f1f3f5; --panel: #fff; --ink: #111418; --faint: #707579; --line: #e4e6e8;
  --accent: #3390ec; --danger: #d93025; --ok: #1e9e57; --warn: #b26a00; --field: #f1f3f4;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1621; --panel: #17212b; --ink: #f5f5f5; --faint: #7f91a4; --line: #101921;
    --accent: #5eb5f7; --danger: #ff6b61; --ok: #4fd08a; --warn: #f0b350; --field: #242f3d;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 14px/1.5 "Microsoft YaHei UI", "PingFang TC", system-ui, sans-serif;
}
header {
  background: var(--panel); border-bottom: 1px solid var(--line);
  padding: 10px 24px; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 24px; min-height: 56px;
}
header h1 { font-size: 17px; margin: 0; letter-spacing: 2px; flex: 1; min-width: 0; }
.tools { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
main { max-width: 1100px; margin: 24px auto; padding: 0 24px; }
.card { background: var(--panel); border-radius: 14px; padding: 20px; margin-bottom: 18px; }
.card.narrow { max-width: 420px; margin: 10vh auto 18px; }
.card.fresh { border: 2px solid color-mix(in srgb, var(--ok) 45%, transparent); }
.card h2 { font-size: 15px; margin: 0 0 14px; }
.card h3 { font-size: 13px; margin: 18px 0 6px; color: var(--faint); }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: end; }
.row.end { justify-content: flex-end; margin-top: 16px; }
.head-row { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: baseline; justify-content: space-between; }
.grow { flex: 1; min-width: 200px; }
label { display: flex; flex-direction: column; gap: 4px; color: var(--faint); font-size: 12.5px; }
label.check { flex-direction: row; align-items: center; gap: 8px; margin-top: 12px; font-size: 13px; color: var(--ink); }
label.check input { width: 18px; height: 18px; min-width: 0; margin: 0; }
input {
  font: inherit; color: var(--ink); background: var(--field); border: 1px solid transparent;
  border-radius: 9px; padding: 8px 11px; min-width: 120px; outline: none;
}
input:focus { border-color: var(--accent); }
#gate label { margin-bottom: 14px; }
#gate input { width: 100%; }
button { font: inherit; cursor: pointer; }
button:disabled { opacity: 0.45; cursor: default; }
button.act {
  font-weight: 600; border: 0; border-radius: 9px; padding: 9px 16px;
  background: var(--accent); color: #fff;
}
button.act.danger { background: var(--danger); }
button.plain {
  font-weight: 600; border: 1px solid var(--line); border-radius: 9px; padding: 8px 14px;
  background: var(--field); color: var(--ink);
}
button.plain.danger { color: var(--danger); }
button.link { background: none; border: 0; color: var(--accent); padding: 4px 8px; border-radius: 8px; }
button.link.danger { color: var(--danger); }
table { width: 100%; border-collapse: collapse; }
th { text-align: left; color: var(--faint); font-weight: 600; font-size: 12.5px; padding: 8px 10px; }
td { padding: 10px; border-top: 1px solid var(--line); vertical-align: top; overflow-wrap: anywhere; }
td.actions { white-space: normal; }
.mono { font-family: Consolas, "SF Mono", monospace; font-size: 13px; }
.tag { display: inline-block; padding: 1px 9px; border-radius: 10px; font-size: 12px; font-weight: 600; }
.tag.ok { color: var(--ok); background: color-mix(in srgb, var(--ok) 14%, transparent); }
.tag.off { color: var(--danger); background: color-mix(in srgb, var(--danger) 14%, transparent); }
.empty { color: var(--faint); padding: 18px 10px; }
.hint { color: var(--faint); font-size: 12.5px; }
.cases { margin: 0; padding-left: 20px; }
.cases li { margin: 3px 0; }
.warn { color: var(--danger); font-size: 12.5px; }
.facts { display: flex; flex-wrap: wrap; gap: 14px 40px; }
.facts > div { display: flex; flex-direction: column; gap: 2px; }
.facts .label { color: var(--faint); font-size: 12.5px; }
.facts strong { font-size: 17px; }
.facts small { color: var(--faint); font-size: 12px; }
.notice {
  margin: 16px 0 0; padding: 10px 14px; border-radius: 10px;
  color: var(--warn); background: color-mix(in srgb, var(--warn) 12%, transparent);
}
#issued-list { list-style: none; margin: 0 0 14px; padding: 0; }
#issued-list li {
  display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center;
  padding: 10px 0; border-top: 1px solid var(--line);
}
#issued-list .key { font-size: 15px; letter-spacing: 1px; user-select: all; overflow-wrap: anywhere; }
#issued-list .who { color: var(--faint); min-width: 80px; }
.offscreen { position: absolute; left: -10000px; top: auto; width: 1px; height: 1px; overflow: hidden; }
dialog {
  border: 0; border-radius: 14px; padding: 22px; max-width: 460px; width: calc(100% - 32px);
  background: var(--panel); color: var(--ink);
}
dialog::backdrop { background: rgba(0, 0, 0, 0.45); }
dialog h2 { font-size: 16px; margin: 0 0 10px; }
#toast {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%); max-width: calc(100% - 32px);
  background: #2b3440; color: #fff; padding: 9px 18px; border-radius: 10px; z-index: 10;
}

@media (max-width: 640px) {
  header { padding: 10px 16px; }
  main { margin: 16px auto; padding: 0 16px; }
  .card { padding: 16px; }
  .card.narrow { margin-top: 4vh; }
  .row { flex-direction: column; align-items: stretch; }
  .row label, .grow { min-width: 0; }
  input, button.act, button.plain { width: 100%; min-height: 44px; }
  label.check input { width: 22px; height: 22px; min-height: 0; }
  button.link { min-height: 40px; }
  thead { display: none; }
  table, tbody, tr, td { display: block; width: 100%; }
  tr { border-top: 1px solid var(--line); padding: 8px 0; }
  td { border: 0; padding: 4px 0; display: flex; gap: 10px; }
  td::before { content: attr(data-label); color: var(--faint); font-size: 12.5px; min-width: 64px; flex: none; }
  td.actions { flex-wrap: wrap; }
  td.actions::before { display: none; }
  td.empty::before { display: none; }
  #issued-list .key { font-size: 14px; }
}