:root {
  --bg: #1c1712;
  --bg2: #2a231c;
  --bg3: #3a3128;
  --border: #5c4c3c;
  --text: #f6f0e6;
  --muted: #a08f7c;
  --accent: #f0b429;
  --ok: #b7d7a8;
  --warn: #f0c36a;
  --bad: #f0b0a4;
  --ink: #1c1712;
  --sheet: #100e0c;
}

* { box-sizing: border-box; }
html { overflow-x: clip; }
body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
img { max-width: 100%; }
a { color: var(--accent); }
h1 { font-size: 1.7rem; line-height: 1.2; margin: 0; }
h2 { font-size: 1.35rem; margin: 0 0 10px; }
h3 { font-size: 1.05rem; margin: 0 0 8px; }
p { margin: 0 0 10px; }
.sr {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

.doc-header {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px 16px;
}
.crumbs {
  margin: 0 0 6px;
  font-size: 14px;
}
.crumbs a {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.lede, .meta { color: var(--muted); }
.lede { max-width: 68ch; margin: 8px 0 0; }
.pitch { margin: 8px 0; max-width: 70ch; font-size: 1.05rem; }
.size-line { margin: 0; color: var(--muted); max-width: 78ch; }

.wrap {
  width: min(1120px, calc(100% - 24px));
  margin: 0 auto;
  padding: 18px 0 64px;
}
.prose { max-width: 72ch; }

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: 14px;
  align-items: stretch;
}
a.card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  height: 100%;
  text-decoration: none;
  color: inherit;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}
a.card:hover, a.card:focus-visible {
  border-color: var(--accent);
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.card-media {
  aspect-ratio: 1280 / 666;
  background: #241e18;
  flex: 0 0 auto;
}
.card-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
}
.card-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 14px 14px;
  flex: 1 1 auto;
}
.card-body h2 { font-size: 1.12rem; margin: 0; }
.card-body .pitch { color: var(--muted); margin: 0; flex: 1 1 auto; font-size: 0.98rem; }
.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  margin: 4px 0 0;
}
.stats div {
  background: var(--bg);
  border-radius: 8px;
  padding: 6px 8px;
}
.stats .wide { grid-column: 1 / -1; }
.stats dt {
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}
.stats dd { margin: 0; font-weight: 700; }

.jumps {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 8px 12px;
  position: sticky;
  top: 0;
  z-index: 6;
  background: rgba(28, 23, 18, 0.96);
  border-bottom: 1px solid var(--border);
}
.jumps a {
  flex: 0 0 auto;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
  background: var(--bg2);
}
.jumps a.is-current {
  color: var(--ink);
  background: var(--accent);
  border-color: var(--accent);
}
.jumps a:focus-visible, button:focus-visible, a.file:focus-visible, .chip:focus-within, .part:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

section.block {
  scroll-margin-top: calc(var(--jump-h, 72px) + 12px);
  margin: 0 0 36px;
}
section.block h2 { color: var(--text); }

#model-stage { position: relative; background: #241e18; }
.stage { position: relative; background: #241e18; border-bottom: 1px solid var(--border); }
#canvas-wrap { position: relative; height: clamp(300px, 48vh, 520px); }
.rotate-hint {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 6;
  margin: 0;
  max-width: calc(100% - 24px);
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(58, 46, 28, 0.94);
  color: var(--warn);
  font-weight: 700;
  font-size: 14px;
  text-align: center;
  pointer-events: none;
}
.rotate-hint[hidden] { display: none !important; }
#btn-exit-fs {
  min-height: 44px;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
#btn-exit-fs[hidden], #btn-fullscreen[hidden] { display: none !important; }
body.fs-lock { overflow: hidden; }
#model-stage:fullscreen,
#model-stage:-webkit-full-screen,
#model-stage.is-fs {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  max-height: 100%;
  background: #241e18;
  border: 0;
}
#model-stage.is-fs {
  position: fixed;
  inset: 0;
  z-index: 40;
}
#model-stage.is-fs.is-turned {
  width: 100vh;
  height: 100vw;
  max-height: none;
  transform: rotate(90deg);
  transform-origin: top left;
  top: 0;
  left: 100vw;
  right: auto;
  bottom: auto;
}
#model-stage:fullscreen .stage,
#model-stage:-webkit-full-screen .stage,
#model-stage.is-fs .stage {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-height: 0;
  border: 0;
}
#model-stage:fullscreen #canvas-wrap,
#model-stage:-webkit-full-screen #canvas-wrap,
#model-stage.is-fs #canvas-wrap {
  flex: 1 1 auto;
  height: auto;
  min-height: 0;
}
#model-stage:fullscreen .tool-bar,
#model-stage:-webkit-full-screen .tool-bar,
#model-stage.is-fs .tool-bar {
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 10px;
  z-index: 5;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(36, 30, 24, 0.92);
  max-height: 42%;
  overflow: auto;
}
#model-stage:fullscreen .tool-note,
#model-stage:-webkit-full-screen .tool-note,
#model-stage.is-fs .tool-note { display: none; }
#model-stage:fullscreen #lit-note:not(:empty),
#model-stage:-webkit-full-screen #lit-note:not(:empty),
#model-stage.is-fs #lit-note:not(:empty) { display: block; }
#canvas-wrap canvas {
  position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: none;
}
#three-loading, #three-error {
  position: absolute; inset: 0; z-index: 4;
  display: flex; align-items: center; justify-content: center;
  padding: 16px; text-align: center; color: var(--muted);
  background: rgba(28, 23, 18, 0.92);
}
#three-loading.is-progress {
  inset: auto 12px 12px auto;
  width: auto;
  max-width: calc(100% - 24px);
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(28, 23, 18, 0.9);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
}
#three-loading[hidden], #three-error[hidden] { display: none !important; }
#three-error { color: #ffd0d0; }
.tool-bar {
  display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center;
  padding: 8px 12px; background: var(--bg2); border-top: 1px solid var(--border);
}
.explode {
  display: flex; align-items: center; gap: 10px; min-height: 44px;
  font-weight: 700; flex: 1 1 240px; min-width: 0;
}
.explode input { flex: 1 1 auto; min-width: 96px; accent-color: var(--accent); }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 44px; padding: 0 12px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg3); font-weight: 700; cursor: pointer;
}
.chip input { width: 1.05rem; height: 1.05rem; accent-color: var(--accent); }
button.ghost, .zoom-bar button, .zoom-tools button {
  min-height: 44px; padding: 8px 12px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg3); color: var(--text);
  font: inherit; font-weight: 700; cursor: pointer;
}
.tool-note { flex: 1 0 100%; margin: 0; color: var(--muted); font-size: 13px; }
#lit-note:empty { display: none; }
#lit-note { color: var(--accent); }

.sheet-summary {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  margin: 0 0 16px;
}
.sheet-summary strong { color: var(--accent); }

.sheet {
  margin: 0 0 22px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}
.sheet-head { padding: 14px 14px 0; }
.sheet-meta { color: var(--muted); margin: 0 0 10px; }
.sheet-bleed {
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 0 10px 4px;
}
.sheet-open {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 10px;
  overflow: hidden;
  background: var(--sheet);
  cursor: zoom-in;
  position: relative;
  color: inherit;
  font: inherit;
}
.sheet-open img {
  width: 100%;
  max-width: 100%;
  height: auto;
  max-height: none;
  display: block;
}
.zoom-hint {
  position: absolute;
  right: 10px;
  bottom: 10px;
  background: rgba(28, 23, 18, 0.88);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 13px;
  font-weight: 700;
}

.parts {
  list-style: none;
  margin: 0;
  padding: 10px;
  display: grid;
  gap: 6px;
}
button.part {
  width: 100%;
  min-height: 48px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas: "num name qty" "num size group";
  gap: 0 10px;
  align-items: center;
  text-align: left;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}
button.part .pn {
  grid-area: num;
  min-width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--bg3);
  color: var(--accent);
  font-weight: 800;
}
button.part .pn-name { grid-area: name; font-weight: 700; }
button.part .pn-size { grid-area: size; color: var(--muted); font-size: 13px; }
button.part .pn-qty { grid-area: qty; font-variant-numeric: tabular-nums; font-weight: 700; }
button.part .pn-group { grid-area: group; color: var(--muted); font-size: 13px; text-align: right; }
button.part.is-lit, button.part[aria-pressed="true"] {
  border-color: var(--accent);
  background: #3d3224;
}
.badge {
  display: inline-block;
  margin-left: 6px;
  padding: 0 6px;
  border-radius: 999px;
  background: #4a3b22;
  color: var(--warn);
  font-size: 12px;
  font-weight: 700;
}

ol.timeline { list-style: none; margin: 0; padding: 0; }
ol.timeline li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 12px;
  padding: 0 0 16px;
}
.step-no {
  width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--bg3);
  border: 2px solid var(--accent);
  color: var(--accent);
  font-weight: 800;
}
.step-body h3 { display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: baseline; }
.mins { color: var(--accent); font-size: 0.92rem; font-weight: 700; }
.total {
  background: var(--bg2);
  border-left: 4px solid var(--accent);
  padding: 10px 12px;
  border-radius: 0 10px 10px 0;
  font-weight: 700;
}

.callout {
  border-left: 4px solid var(--warn);
  background: #3a2e1c;
  padding: 12px 14px;
  border-radius: 0 10px 10px 0;
  margin: 0 0 14px;
}
.fine { color: var(--muted); font-size: 14px; }

.table-wrap { overflow-x: auto; margin: 0 0 12px; }
table { width: 100%; border-collapse: collapse; min-width: 520px; }
th, td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th { color: var(--accent); font-size: 13px; font-weight: 700; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td.neg, tr.neg td { color: var(--bad); }
caption { text-align: left; caption-side: bottom; color: var(--muted); font-size: 13px; padding-top: 8px; }

.calc {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin: 8px 0 12px;
}
.calc label { display: flex; flex-direction: column; gap: 4px; font-weight: 700; font-size: 14px; }
.calc input, .calc select {
  min-height: 44px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font: inherit;
  padding: 8px 10px;
}
.calc-out {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 8px;
  margin: 0 0 10px;
}
.calc-out div {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
}
.calc-out strong { display: block; color: var(--accent); font-size: 12px; font-weight: 700; }
.calc-out span { font-variant-numeric: tabular-nums; font-weight: 700; white-space: nowrap; }
.calc-out .neg span { color: var(--bad); }

.files { display: grid; gap: 8px; }
a.file {
  display: block;
  text-decoration: none;
  color: var(--text);
  background: var(--bg2);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  padding: 10px 12px;
}
a.file strong { display: block; color: var(--accent); }
a.file span { display: block; margin-top: 4px; color: var(--muted); font-size: 13px; overflow-wrap: anywhere; }
ul.plain { margin: 0 0 12px; padding-left: 1.2em; }
ul.plain li { margin: 6px 0; }

.site-foot {
  color: var(--muted);
  font-size: 13px;
  margin: 28px 0 0;
}

dialog.zoom {
  width: 100vw;
  height: 100dvh;
  max-width: 100vw;
  max-height: 100dvh;
  margin: 0;
  padding: 0;
  border: 0;
  background: var(--sheet);
  color: var(--text);
}
dialog.zoom::backdrop { background: rgba(0, 0, 0, 0.72); }
dialog.zoom[open] { display: flex; flex-direction: column; }
.zoom-bar, .zoom-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 8px 10px;
  background: var(--bg2);
}
.zoom-bar p { margin: 0; font-weight: 700; flex: 1 1 auto; }
.zoom-stage {
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  touch-action: none;
  position: relative;
  cursor: grab;
  background: var(--sheet);
}
.zoom-stage.is-grabbing { cursor: grabbing; }
.zoom-stage img {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: auto;
  max-width: none;
  transform-origin: 0 0;
  user-select: none;
  -webkit-user-drag: none;
}

@media (max-width: 700px) {
  h1 { font-size: 1.4rem; }
  #canvas-wrap { height: clamp(240px, 38vh, 420px); }
  .wrap { width: min(1120px, calc(100% - 16px)); }
  button.part { grid-template-columns: auto 1fr; grid-template-areas: "num name" "num size" "num qty" "num group"; }
  button.part .pn-qty, button.part .pn-group { text-align: left; }
}

@media (min-width: 900px) {
  .gallery { grid-template-columns: repeat(3, 1fr); }
}