:root {
  --bg: #f4f1ec;
  --panel: #fbfaf7;
  --ink: #23201c;
  --muted: #6f675d;
  --line: #ddd5c9;
  --accent: #a87b2c;
  --accent-ink: #fff;
  --warn-bg: #fff3df;
  --warn-ink: #7a4a00;
  --changed: #a87b2c;
  --fixed-bg: #e6eef5;
  --fixed-ink: #3d5f7d;
  --viewport: #ebe6de;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1b1916; --panel: #23201c; --ink: #ece6dc; --muted: #a39a8c; --line: #3a352e;
    --accent: #d7a84c; --accent-ink: #1b1916; --warn-bg: #3a2c12; --warn-ink: #f3cf8a; --viewport: #2a2622; --fixed-bg: #22303c; --fixed-ink: #9cc0de;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #1b1916; --panel: #23201c; --ink: #ece6dc; --muted: #a39a8c; --line: #3a352e;
  --accent: #d7a84c; --accent-ink: #1b1916; --warn-bg: #3a2c12; --warn-ink: #f3cf8a; --viewport: #2a2622; --fixed-bg: #22303c; --fixed-ink: #9cc0de;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--ink); font: 14px/1.45 ui-sans-serif, -apple-system, "Segoe UI", Roboto, sans-serif; }
button { font: inherit; cursor: pointer; }

.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 16px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.top h1 { margin: 0; font-size: 18px; font-weight: 650; letter-spacing: .01em; }
.top h1 span { font-weight: 400; color: var(--muted); font-size: 14px; margin-left: 6px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

.btn { border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink); border-radius: 8px; padding: 6px 12px; }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--accent); }
.btn.small { padding: 3px 9px; font-size: 13px; }

.app { display: grid; grid-template-columns: 330px 1fr; height: calc(100vh - 55px); }
.side { overflow: auto; border-right: 1px solid var(--line); padding: 12px 14px 24px; background: var(--panel); }
.main { display: flex; flex-direction: column; min-width: 0; min-height: 0; }

.keys { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin-bottom: 10px; }
.keys div { display: flex; flex-direction: column; align-items: flex-start; }
.keys b { font-size: 17px; font-variant-numeric: tabular-nums; }
.keys span { font-size: 11px; color: var(--muted); line-height: 1.2; }

.warnings { background: var(--warn-bg); color: var(--warn-ink); border-radius: 8px; padding: 8px 10px 8px 26px; margin: 0 0 10px; font-size: 13px; }
.warnings li + li { margin-top: 4px; }

details { border-top: 1px solid var(--line); padding: 6px 0; }
summary { font-weight: 600; cursor: pointer; padding: 4px 0; }
.param { display: block; margin: 6px 0 8px; font-size: 13px; padding-left: 8px; border-left: 2px solid transparent; }
.param .lbl { display: flex; align-items: center; gap: 6px; color: var(--muted); margin-bottom: 2px; min-height: 20px; }
.param .lbl > span { flex: 1; }
.param.changed { border-left-color: var(--changed); }
.param.changed .lbl > span { color: var(--changed); font-weight: 600; }
.param .reset { display: none; border: 1px solid var(--line); background: transparent; color: var(--muted); border-radius: 5px; padding: 0 6px; font-size: 11.5px; line-height: 18px; white-space: nowrap; }
.param.changed .reset { display: inline-block; }
.param .reset:hover { border-color: var(--changed); color: var(--ink); }
.param .lock { display: inline-flex; align-items: center; gap: 3px; border: 0; background: var(--fixed-bg); color: var(--fixed-ink); border-radius: 5px; padding: 0 6px; font-size: 11px; line-height: 18px; }
.param .lock svg { width: 11px; height: 11px; fill: none; stroke: currentColor; stroke-width: 1.6; }
.param.unlocked .lock .shackle { transform: translate(3px, -1px) rotate(18deg); transform-origin: 11px 7px; }
.param.unlocked .lock { background: transparent; border: 1px dashed var(--fixed-ink); }
.param.fixed:not(.unlocked) input, .param.fixed:not(.unlocked) select { opacity: .55; cursor: not-allowed; }
summary .count { font-weight: 500; font-size: 11.5px; color: var(--changed); margin-left: 8px; }
.presets { display: grid; grid-template-columns: 1fr auto auto; gap: 6px; margin-bottom: 6px; }
.presets select { min-width: 0; padding: 4px 6px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink); font: inherit; font-size: 13px; }
.btn:disabled { opacity: .45; cursor: default; }
.changedAll { margin: 0 0 6px; font-size: 12px; color: var(--muted); }
.inputs { display: grid; grid-template-columns: 1fr 72px 22px; gap: 6px; align-items: center; }
.inputs input[type=range] { width: 100%; accent-color: var(--accent); }
.inputs input[type=number], .param select { width: 100%; padding: 3px 5px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink); font: inherit; font-variant-numeric: tabular-nums; }
.inputs i { font-style: normal; color: var(--muted); font-size: 11px; }
.fine { color: var(--muted); font-size: 12px; margin-top: 14px; }

.tabs { display: flex; gap: 2px; padding: 8px 12px 0; border-bottom: 1px solid var(--line); overflow-x: auto; }
.tabs button { background: none; border: 0; padding: 7px 12px; color: var(--muted); border-bottom: 2px solid transparent; white-space: nowrap; }
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); font-weight: 600; }

.tab { flex: 1; min-height: 0; }
#tab-3d { display: flex; flex-direction: column; }
#tab-3d[hidden] { display: none; }
#viewport { flex: 1; min-height: 300px; position: relative; background: var(--viewport); overflow: hidden; }
#viewport canvas { display: block; }
.nogl { padding: 24px; color: var(--muted); }
#tip { position: absolute; left: 0; top: 0; pointer-events: none; background: rgba(20, 18, 15, .88); color: #fff; padding: 5px 9px; border-radius: 6px; font-size: 12.5px; max-width: 320px; }
.viewbar { display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center; padding: 8px 12px; border-top: 1px solid var(--line); font-size: 13px; }
.viewbar label { display: flex; align-items: center; gap: 8px; }
.viewbar input[type=range] { width: 180px; accent-color: var(--accent); }
/* on the 3D view, so its changing text never resizes the canvas */
.samples { position: absolute; right: 10px; bottom: 8px; pointer-events: none; font-size: 12px; color: #fff; background: rgba(20, 18, 15, .55); padding: 2px 8px; border-radius: 6px; font-variant-numeric: tabular-nums; }
.samples:empty { display: none; }
.viewbar .group { display: flex; align-items: center; gap: 4px; color: var(--muted); }

.docs { overflow: auto; padding: 16px; }
.paper { background: #fff; color: #1c1a17; border-radius: 6px; padding: 16px 18px; margin: 0 auto 16px; max-width: 1100px; box-shadow: 0 1px 2px rgba(0,0,0,.08); }
.paper h2 { margin: 0 0 8px; font-size: 16px; }
.paper h4 { margin: 14px 0 6px; font-size: 13px; color: #555; }
.tray-details { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 12px; }
.paper.split { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; align-items: start; }
.paper svg.drawing { width: 100%; height: auto; display: block; max-height: 75vh; }
.prose { max-width: 820px; font-size: 14px; }
.prose li { margin-bottom: 8px; }
.prose .warn { background: #fff3df; color: #7a4a00; padding: 6px 10px; border-radius: 6px; }
.legend { columns: 4; font-size: 13px; margin: 8px 0 0; }
.lead { max-width: 820px; margin: 0 auto 10px; }
#tab-templates > .btn { display: block; margin: 0 auto 14px; }

table.coords, table.passes { border-collapse: collapse; font-size: 12.5px; font-variant-numeric: tabular-nums; margin: 4px 0; }
table.coords td, table.coords th, table.passes td, table.passes th { border-bottom: 1px solid #e6e0d6; padding: 3px 10px 3px 0; text-align: left; }
table.passes tr.cove td { font-weight: 600; }

/* drawing strokes, all in mm */
svg.drawing { --ink: #1c1a17; }
.drawing .cut { fill: url(#hatch); stroke: #1c1a17; stroke-width: .35; stroke-linejoin: round; }
.drawing .cutB { fill: url(#hatchB); stroke: #7a5a12; stroke-width: calc(.3 * var(--k, 1)); }
.drawing .cutL { fill: url(#hatchL); stroke: #1c1a17; stroke-width: calc(.35 * var(--k, 1)); stroke-linejoin: round; }
.drawing .rod { fill: #e8e5df; stroke: #555; stroke-width: calc(.25 * var(--k, 1)); }
.hatchline { stroke: #a07a50; }
.drawing .outline { fill: none; stroke: #1c1a17; stroke-width: calc(.35 * var(--k, 1)); }
.drawing .tpl { fill: rgba(200, 160, 110, .12); stroke: #000; stroke-width: .3; stroke-linejoin: round; }
.drawing .thin { stroke: #333; stroke-width: calc(.18 * var(--k, 1)); }
.drawing .centre { stroke: #b03a2e; stroke-width: calc(.18 * var(--k, 1)); stroke-dasharray: 6 1.5 1 1.5; }
.drawing .thinDash { fill: none; stroke: #b03a2e; stroke-width: .8; stroke-dasharray: 6 4; }
.drawing .arrow { fill: #333; }
.drawing .dot { fill: #333; }
.drawing .frame { fill: none; stroke: #999; stroke-width: calc(.25 * var(--k, 1)); stroke-dasharray: 2 1; }
.drawing .balloon { fill: #fff; stroke: #1c1a17; stroke-width: calc(.3 * var(--k, 1)); }
.drawing .txt, .drawing .title { fill: #1c1a17; font-family: ui-sans-serif, -apple-system, "Segoe UI", sans-serif; }
.drawing .title { font-weight: 600; }
.drawing .grid { stroke: #cfd8e3; stroke-width: .12; }
.drawing .sheet { fill: #f2e3cb; stroke: #8a6a45; stroke-width: 1; }
.drawing .disc { fill: #e3c89f; stroke: #1c1a17; stroke-width: 1.2; }
.drawing .sqH { fill: #d9b98c; stroke: #1c1a17; stroke-width: 1; }
.drawing .sqN { fill: #ccb08a; stroke: #1c1a17; stroke-width: 1; }

/* template pages, shown on screen as paper sheets */
.pages { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.page { background: #fff; color: #1c1a17; width: 210mm; min-height: 297mm; padding: 12mm; box-shadow: 0 1px 3px rgba(0,0,0,.15); zoom: .6; }
.page h3 { margin: 0 0 4mm; font-size: 14px; }
.page h3 small { font-weight: 400; color: #666; }
.page svg.tplsvg { display: block; border: 1px dashed #bbb; }
.calbar { margin-top: 3mm; }

#print { display: none; }
svg.defs { position: absolute; width: 0; height: 0; overflow: hidden; }

@media (max-width: 820px) {
  .app { grid-template-columns: 1fr; height: auto; }
  .main { order: -1; }
  .tray-details { grid-template-columns: 1fr; }
  .side { border-right: 0; border-top: 1px solid var(--line); max-height: none; }
  .main { min-height: 80vh; }
  #viewport { min-height: 60vh; }
  .tray-details { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 12px; }
.paper.split { grid-template-columns: 1fr; }
  .page { zoom: .42; }
  .legend { columns: 2; }
}

@page { size: A4 portrait; margin: 0; }
@media print {
  body > *:not(#print):not(.defs) { display: none !important; }
  body { background: #fff; }
  #print { display: block; }
  #print .pages { display: block; }
  #print .page { zoom: 1; box-shadow: none; margin: 0; page-break-after: always; break-after: page; width: 210mm; height: 297mm; overflow: hidden; }
  #print .paper { box-shadow: none; max-width: none; margin: 10mm 12mm; padding: 0; break-inside: avoid; page-break-after: always; }
  #print .paper svg.drawing { max-height: 250mm; }
  #print .tray-details { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 12px; }
.paper.split { grid-template-columns: 1fr; }
}