:root {
  --red: #c8102e;
  --red-dark: #9e0c24;
  --bg: #f6f6f7;
  --card: #fff;
  --text: #1d1d1f;
  --muted: #6b6b70;
  --border: #e2e2e6;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #151517; --card: #1f1f22; --text: #f2f2f4; --muted: #a0a0a8; --border: #33333a; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); }
header { background: var(--red); color: #fff; padding: 14px 16px 0; }
header h1 { margin: 0 0 10px; font-size: 20px; }
header h1 span { font-weight: 400; opacity: .85; }
nav { display: flex; gap: 4px; overflow-x: auto; }
nav button { white-space: nowrap; background: transparent; color: #fff; border: 0; padding: 10px 14px; border-radius: 8px 8px 0 0; cursor: pointer; font: inherit; opacity: .85; }
nav button.active { background: var(--bg); color: var(--text); opacity: 1; }
main { max-width: 1100px; margin: 0 auto; padding: 16px; }
.tab { display: none; }
.tab.active { display: block; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin-bottom: 16px; }
h2 { margin: 0 0 12px; font-size: 17px; }
h3 { margin: 18px 0 8px; font-size: 15px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
label small { font-size: 11px; opacity: .8; }
input[readonly] { background: var(--bg); }
label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
input, select, textarea { font: inherit; color: var(--text); background: var(--card); border: 1px solid var(--border); border-radius: 6px; padding: 7px 9px; width: 100%; }
textarea { font-family: ui-monospace, monospace; font-size: 13px; }
button, .file-btn { font: inherit; border: 1px solid var(--border); background: var(--card); color: var(--text); border-radius: 6px; padding: 7px 12px; cursor: pointer; }
.file-btn { display: inline-block; font-size: 15px; }
button.primary { background: var(--red); border-color: var(--red); color: #fff; }
button.primary:hover { background: var(--red-dark); }
button.danger { color: var(--red); }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.toolbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.toolbar h2 { margin: 0; }
.toolbar input { max-width: 240px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 7px 6px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; }
.num { text-align: right; white-space: nowrap; }
td.num input { width: 80px; text-align: right; }
.row-actions { text-align: right; white-space: nowrap; }
.row-actions button { padding: 4px 8px; font-size: 13px; margin-left: 4px; }
.empty, .muted { color: var(--muted); }
.split { display: grid; grid-template-columns: 300px 1fr; gap: 16px; align-items: start; }
.list { list-style: none; margin: 0; padding: 0; }
.list li { display: flex; flex-direction: column; padding: 9px 10px; border-radius: 6px; cursor: pointer; }
.list li:hover { background: var(--bg); }
.list li.active { background: var(--bg); box-shadow: inset 3px 0 0 var(--red); }
.breakdown { margin-top: 16px; border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; }
.breakdown div { display: flex; justify-content: space-between; padding: 3px 0; }
.breakdown .subtotal { border-top: 1px solid var(--border); margin-top: 4px; padding-top: 7px; font-weight: 600; }
.breakdown .total { font-size: 18px; font-weight: 700; color: var(--red); border-top: 1px solid var(--border); margin-top: 4px; padding-top: 7px; }
.breakdown p { margin: 6px 0 0; font-size: 13px; }
.qty-calc { display: flex; align-items: end; gap: 14px; flex-wrap: wrap; margin-top: 14px; }
.qty-calc label { width: 140px; }
.order-total { margin-top: 10px; padding: 10px 14px; background: var(--bg); border-radius: 8px; }
.order-total div { display: flex; justify-content: space-between; gap: 12px; padding: 2px 0; }
.order-total .total { font-size: 18px; font-weight: 700; color: var(--red); }
.order-total .discount { color: #1a7f37; }
.order-total .minimum { color: #b25e00; font-weight: 600; }
form[data-pricing="unit"] .area-only, form[data-pricing="area"] .unit-only,
form[data-pricing="tier"] .area-only, form[data-pricing="tier"] .unit-only { display: none; }
.msg { color: var(--muted); }
@media (max-width: 760px) {
  .split { grid-template-columns: 1fr; }
  table { font-size: 14px; }
  #tab-items th:nth-child(2), #item-rows td:nth-child(2),
  #tab-items th:nth-child(4), #item-rows td:nth-child(4) { display: none; }
  #product-form th:nth-child(3), #component-rows td:nth-child(3) { display: none; }
}
.small { font-size: 13px; margin: 8px 0 0; }
#tab-calc .card { max-width: 680px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.chips button { border-radius: 999px; padding: 7px 16px; }
.chips button.active { background: var(--red); border-color: var(--red); color: #fff; }
#price-config-rows input { max-width: 120px; text-align: right; }
#price-config-rows input[data-field="name"] { max-width: none; text-align: left; }
#price-config-rows select { max-width: 150px; }
.tiers { display: flex; flex-direction: column; gap: 6px; align-items: flex-start; }
.tier, .scale { display: flex; align-items: center; gap: 6px; white-space: nowrap; }
#price-config-rows .tier input, #price-config-rows .scale input { width: 80px; }
.scale { flex-wrap: wrap; }
.warn { color: #b25e00; font-size: 13px; margin: 4px 0 0; white-space: normal; }
.overlay { position: fixed; inset: 0; background: rgba(0, 0, 0, .45); display: flex; align-items: center; justify-content: center; padding: 16px; z-index: 10; }
.overlay[hidden] { display: none; }
.dialog { max-width: 380px; width: 100%; margin: 0; }
.dialog p { margin: 0; }
.with-unit { display: flex; gap: 6px; }
.with-unit select { width: auto; flex: none; }
h3 small { font-weight: 400; font-size: 12px; }
.grid + .grid { margin-top: 12px; }
.sizes-config { display: flex; flex-direction: column; gap: 8px; }
.sizes-config details summary { cursor: pointer; color: var(--muted); font-size: 13px; }
.sizes-config textarea { margin: 6px 0; }
.order-total .hint { color: var(--muted); font-size: 13px; }
fieldset { border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px 14px; margin: 16px 0 0; }
legend { padding: 0 6px; }
.toggle { flex-direction: row; align-items: center; gap: 8px; color: var(--text); font-weight: 600; font-size: 15px; cursor: pointer; }
.toggle input { width: auto; accent-color: var(--red); }
fieldset.off .grid { opacity: .45; }
.p3d { grid-template-columns: 1fr 340px; }
.p3d-result { position: sticky; top: 16px; }
.p3d-filaments { margin: 8px 0; }
.p3d-filaments td input { width: 100%; }
.p3d-filaments td.num input { text-align: right; }
.segmented { display: flex; border: 1px solid var(--border); border-radius: 8px; padding: 3px; gap: 3px; margin-bottom: 12px; }
.segmented button { flex: 1; border: 0; background: transparent; }
.segmented button.active { background: var(--red); color: #fff; }
.p3d-result .breakdown { margin-top: 0; }
@media (max-width: 760px) {
  .p3d { grid-template-columns: 1fr; }
  .p3d-result { position: static; order: -1; }
}
.variants { margin: 4px 0 14px; flex-wrap: wrap; }
.variants button { flex: 1 1 auto; padding: 8px 12px; }
.variants small { display: block; font-size: 12px; opacity: .85; }
#price-config-rows .variant-row input[data-variant-field="name"] { width: 240px; text-align: left; }
.variants[hidden] { display: none; }
#calc-addon-wrap { margin-top: 12px; }
#calc-addon-wrap[hidden] { display: none; }
#price-config-rows .add-on input[data-field="addOnName"] { width: 160px; }
h1 .version { font-size: 0.75em; font-weight: 400; opacity: 0.85; white-space: nowrap; }