:root {
  --bg: #f3f4f6;
  --card: #fff;
  --text: #111827;
  --muted: #6b7280;
  --border: #d1d5db;
  --primary: #1d4ed8;
  --danger: #b91c1c;
  --radius: 8px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; }
h1 { font-size: 1.4rem; margin: 0 0 .5rem; }
h2 { font-size: 1.15rem; margin: 0 0 .75rem; }
h3 { font-size: 1rem; margin: 1.25rem 0 .5rem; }
a { color: var(--primary); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.big { font-size: 1.1rem; }
.muted { color: var(--muted); }
.error { color: var(--danger); }

.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: .6rem 1rem; background: #1f2937; color: #fff;
  position: sticky; top: 0; z-index: 10;
}
.topbar a, .topbar .link { color: #fff; text-decoration: none; }
.topbar nav { display: flex; gap: 1rem; align-items: center; }
.brand { font-weight: 700; }

main { max-width: 1000px; margin: 0 auto; padding: 1rem; }
.card {
  background: var(--card); border-radius: var(--radius); padding: 1rem 1.25rem;
  margin-bottom: 1rem; box-shadow: 0 1px 2px rgb(0 0 0 / .06);
}
.card.narrow { max-width: 380px; margin: 3rem auto; }

.row { display: flex; gap: .5rem; align-items: center; margin: .5rem 0; }
.row.between { justify-content: space-between; }
.row.wrap { flex-wrap: wrap; }
.stack { display: flex; flex-direction: column; gap: .75rem; }
.columns { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1rem; }
.columns .card { margin-bottom: 0; }
.columns + .card { margin-top: 1rem; }

label { display: flex; flex-direction: column; gap: .25rem; font-size: .9rem; color: #374151; }
label.inline { display: inline-flex; flex-direction: row; align-items: center; margin-right: 1rem; }
fieldset { border: 1px solid #e5e7eb; border-radius: 6px; padding: .5rem .75rem; }
legend { font-size: .9rem; color: #374151; padding: 0 .25rem; }
input, select, textarea, button, .button {
  font: inherit; padding: .5rem .65rem; border: 1px solid var(--border);
  border-radius: 6px; background: #fff; color: inherit; min-height: 2.5rem;
}
input[type=checkbox] { min-height: auto; width: 1.1rem; height: 1.1rem; }
.row input[type=search] { flex: 1 1 200px; }
button, .button { cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; }
button:disabled { opacity: .5; cursor: default; }
.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.danger { color: var(--danger); border-color: var(--danger); }
.link { background: none; border: none; padding: 0; min-height: auto; color: var(--primary); }
.link.danger { color: var(--danger); }

.grid-form { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: .75rem 1rem; }
.span-2 { grid-column: 1 / -1; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .5rem; border-bottom: 1px solid #e5e7eb; vertical-align: top; }
th { font-size: .8rem; text-transform: uppercase; color: var(--muted); }
ul.plain { list-style: none; padding: 0; margin: 0 0 .5rem; }
ul.plain li { padding: .25rem 0; border-bottom: 1px solid #f3f4f6; margin: 0; }

.spec-fields { border-top: 1px solid #e5e7eb; border-bottom: 1px solid #e5e7eb; padding: .5rem 0 .75rem; }
.spec-fields h2 { font-size: 1rem; margin: .25rem 0 .5rem; }
.fields-editor { margin: .5rem 0 1rem; }
.fields-editor textarea { width: 100%; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .85rem; }
.chips { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .4rem; }
.chip { display: inline-flex; align-items: center; gap: .25rem; padding: .1rem .55rem; border-radius: 999px; background: #e0e7ff; color: #3730a3; font-size: .85rem; text-decoration: none; }
.chip button { background: none; border: none; padding: 0 .1rem; min-height: auto; color: inherit; font-size: 1rem; line-height: 1; cursor: pointer; }
a.chip:hover { background: #c7d2fe; }
.pager { display: flex; flex-wrap: wrap; gap: .5rem 1rem; align-items: center; justify-content: space-between; margin-top: .75rem; }
.pager .pages { display: flex; flex-wrap: wrap; gap: .25rem .6rem; align-items: center; }
.pager .pages a, .pager .pages strong { min-width: 1.5rem; text-align: center; }
.pager label { display: flex; align-items: center; margin: 0; white-space: nowrap; }
.pager select { min-height: auto; padding: .15rem .3rem; margin-left: .25rem; }
.topbar .count { display: inline-block; min-width: 1.2rem; padding: 0 .35rem; border-radius: 999px; background: #fff; color: #1f2937; font-size: .75rem; text-align: center; }
.badge { display: inline-block; padding: .1rem .5rem; border-radius: 999px; font-size: .8rem; font-family: system-ui, sans-serif; vertical-align: middle; }
.badge-available { background: #dcfce7; color: #166534; }
.badge-assigned { background: #dbeafe; color: #1e40af; }
.badge-repair { background: #fef3c7; color: #92400e; }
.badge-retired { background: #e5e7eb; color: #374151; }

.detail-grid { display: grid; grid-template-columns: 1fr 180px; gap: 1rem; align-items: start; }
.fields { display: grid; grid-template-columns: max-content 1fr; gap: .4rem 1rem; margin: 0; }
.fields dt { color: var(--muted); }
.fields dd { margin: 0; }
.qr-box { margin: 0; text-align: center; }
.qr-box .qr { width: 100%; height: auto; }
.photos { display: flex; gap: .5rem; flex-wrap: wrap; margin-top: 1rem; }
.photos img { height: 140px; border-radius: 6px; object-fit: cover; }
.photo-grid { display: flex; gap: .75rem; flex-wrap: wrap; }
.photo-tile { display: flex; flex-direction: column; gap: .25rem; align-items: center; }
.photo-tile img { width: 100px; height: 100px; border-radius: 6px; object-fit: cover; }
.photo-tile span { display: flex; gap: .25rem; align-items: center; }

.label-list { display: flex; flex-direction: column; gap: 1rem; }
.label-item { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
.label-item canvas {
  width: 384px; max-width: 100%; height: auto; image-rendering: pixelated;
  border: 1px dashed var(--border); border-radius: 4px; background: #fff;
}
.printer-status { font-size: .9rem; }
.printer-status.ok { color: #166534; }
details summary { cursor: pointer; }
pre.gatt { font-size: .75rem; background: #f9fafb; padding: .5rem; overflow-x: auto; }

#toast {
  position: fixed; bottom: 1rem; left: 50%; transform: translateX(-50%);
  background: #111827; color: #fff; padding: .6rem 1rem; border-radius: 6px;
  max-width: 90vw; z-index: 20;
}
#toast.error { background: var(--danger); }

@media (max-width: 640px) {
  .hide-sm { display: none; }
  .detail-grid { grid-template-columns: 1fr; }
  .qr-box { max-width: 200px; margin: 0 auto; }
  .topbar nav { gap: .7rem; font-size: .9rem; }
  main { padding: .5rem; }
}