/* Shop Pen Plotter proposal v3. One committed dark look: white linework on blueprint blue.
   Default CSS is the final, static state. Motion modes are opted into by classes that app.js adds. */
:root {
  --ground: #0e2c57;
  --panel: #0a2347;
  --line: #eaf2fc;
  --dim: #c4d6ee;
  --grid: rgba(234, 242, 252, .12);
  --grid2: rgba(234, 242, 252, .17);
  --mark: #ffd27a;
  --save: #8fe3b0;
  --display: "Big Shoulders Display", "Arial Narrow", "Roboto Condensed", Impact, sans-serif;
  --body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --gutter: clamp(20px, 4vw, 40px);
  --maxw: 1200px;
  --bar: 26px;
  --toc: 40px;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background-color: var(--ground);
  color: var(--line);
  font: 400 16px/1.6 var(--body);
  overflow-x: hidden;
}
img, svg, canvas { max-width: 100%; }
a { color: var(--mark); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--mark); outline-offset: 3px; }
summary:focus-visible { outline-offset: 2px; }
p { margin: 0; }
h1, h2, h3 { margin: 0; text-wrap: balance; }
.mono { font-family: var(--mono); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.money, .num, .data td, .data th, [data-count] { font-variant-numeric: tabular-nums; }

.wrap { max-width: calc(var(--maxw) + 2 * var(--gutter)); margin: 0 auto; padding-inline: var(--gutter); position: relative; z-index: 1; }

.skip {
  position: absolute; left: 12px; top: -60px; z-index: 60;
  background: var(--mark); color: var(--panel); font: 500 14px var(--mono);
  padding: 8px 12px; text-decoration: none;
}
.skip:focus { top: 12px; }

.draft { position: relative; z-index: 2; background: var(--mark); color: var(--panel); font-size: 13px; padding: 34px 0 8px; }

/* ---------- Global sheet grid: two fixed layers ---------- */
.bg {
  position: fixed; left: 0; width: 100%; top: -120px; height: calc(100vh + 240px);
  pointer-events: none; z-index: 0; will-change: transform;
}
.bg-fine {
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
}
.bg-coarse {
  background-image: linear-gradient(var(--grid2) 1px, transparent 1px), linear-gradient(90deg, var(--grid2) 1px, transparent 1px);
  background-size: 120px 120px;
}
body { padding-top: var(--bar); }
main, .foot { position: relative; z-index: 1; }
.bg { transform: none; }

/* ---------- Scroll progress as a dimension line ---------- */
.dimbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--bar); z-index: 50;
  display: flex; align-items: center; gap: 0; padding: 0 var(--gutter);
  background: var(--panel); border-bottom: 1px solid var(--grid);
}
.db-tick { width: 1px; height: 14px; background: var(--dim); flex: none; }
.db-line { position: relative; flex: 1; height: 1px; background: var(--grid2); }
.db-line::before, .db-line::after { content: ""; position: absolute; top: -3px; border: 3.5px solid transparent; }
.db-line::before { left: 0; border-right: 7px solid var(--dim); border-left: 0; }
.db-line::after { right: 0; border-left: 7px solid var(--dim); border-right: 0; }
.db-fill { position: absolute; left: 0; top: -1px; height: 3px; width: 100%; background: var(--mark); transform-origin: left center; transform: scaleX(0); }
.db-read { flex: none; width: 84px; text-align: right; font-size: 13px; letter-spacing: .06em; color: var(--mark); font-variant-numeric: tabular-nums; }

/* ---------- Sections ---------- */
/* ---------- Tabs ---------- */
.tabs { position: sticky; top: var(--bar); z-index: 49; background: var(--panel); border-bottom: 1.5px solid var(--line); font-size: 14px; }
.tabs-in { max-width: calc(var(--maxw) + 2 * var(--gutter)); margin: 0 auto; display: flex; padding-inline: var(--gutter); overflow-x: auto; scrollbar-width: none; }
.tabs-in::-webkit-scrollbar { display: none; }
.tabs a {
  flex: 1 0 auto; display: flex; align-items: center; justify-content: center; gap: 6px; height: var(--toc);
  color: var(--dim); text-decoration: none; letter-spacing: .04em; white-space: nowrap; padding: 0 16px;
  border-bottom: 3px solid transparent; border-left: 1px solid var(--grid);
}
.tabs a:first-child { border-left: 0; }
.tabs a b { font-weight: 500; }
.tabs a:hover { color: var(--line); }
.tabs a[aria-selected="true"] { color: var(--mark); border-bottom-color: var(--mark); }
.tabs a:focus-visible { outline-offset: -3px; }
.js .tabpanel { display: none; }
.js[data-tab="summary"] #summary, .js[data-tab="machine"] #machine, .js[data-tab="cost"] #cost,
.js[data-tab="parts"] #parts, .js[data-tab="files"] #files { display: block; }
.tabpanel:focus { outline: none; }
.tabpanel + .tabpanel { margin-top: 0; }
.next { margin-top: 48px; padding-top: 22px; border-top: 1px solid var(--grid2); text-align: right; font: 500 15px/1.2 var(--mono); }
.next a { color: var(--mark); }

/* solid sheet under all text: the grid shows only in the margins */
.sec { position: relative; }
.sec > .wrap { background: var(--ground); }
.sec > .wrap { padding-block: clamp(48px, 8vw, 96px) clamp(40px, 6vw, 72px); border-inline: 1px solid var(--grid2); }
.sec .wrap > * + * { margin-top: 26px; }
.sec .wrap > .next { margin-top: 48px; }
.sec-head.no-zone { grid-template-columns: 1fr; }
.sec-head { display: grid; grid-template-columns: auto 1fr; align-items: center; column-gap: 14px; row-gap: 12px; }
.zone {
  font: 500 14px/1 var(--mono); color: var(--mark); border: 1.5px solid var(--mark);
  width: 34px; height: 34px; display: grid; place-items: center;
}
h2 { font-family: var(--display); font-weight: 800; text-transform: uppercase; font-size: clamp(36px, 5.6vw, 72px); line-height: .95; }
.dimline { grid-column: 1 / -1; height: 11px; position: relative; display: block; }
.dl-line { position: absolute; inset: 0 0 0 0; display: block; }
.dl-line::before { content: ""; position: absolute; left: 0; right: 0; top: 5px; border-top: 1px solid var(--dim); }
.dl-line::after {
  content: ""; position: absolute; right: 1px; top: 1.5px; border: 4px solid transparent; border-left: 8px solid var(--dim); border-right: 0;
}
.dl-start, .dl-end { position: absolute; top: 0; width: 1px; height: 11px; background: var(--dim); transform-origin: center; }
.dl-start { left: 0; }
.dl-end { right: 0; }
.dl-line b, .dl-line i { display: none; }
h3 { font: 500 13px/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--dim); }
.prose { max-width: 68ch; color: var(--line); font-size: 17px; }
.note { font: 400 13px/1.5 var(--mono); color: var(--dim); max-width: 90ch; }
.ask {
  font-family: var(--body); font-weight: 500; font-size: clamp(24px, 3.4vw, 40px); line-height: 1.3; max-width: 30ch;
  border-left: 4px solid var(--mark); padding-left: 24px;
}

/* ---------- A: general notes ---------- */
.notes { width: 100%; border-collapse: collapse; border: 1.5px solid var(--line); background: var(--panel); }
.notes caption { text-align: left; font-size: 13px; letter-spacing: .14em; color: var(--mark); padding: 0 0 10px; }
.notes td { padding: clamp(14px, 2vw, 24px) clamp(14px, 2vw, 24px); border-top: 1px solid var(--grid2); vertical-align: top; font-size: clamp(17px, 1.9vw, 24px); line-height: 1.45; }
.notes tr:first-child td { border-top: 0; }
.notes .n { width: 1%; white-space: nowrap; font: 500 clamp(15px, 1.6vw, 20px)/1.6 var(--mono); color: var(--mark); padding-right: 0; }
.notes b { font-weight: 500; color: var(--mark); }
.notes .num, .notes .money { font-family: var(--mono); font-size: .92em; }

.chart-cap { font: 500 13px/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--dim); margin-bottom: 12px; }

.view-label { display: block; font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--dim); margin-bottom: 2px; }
/* ---------- E: files ---------- */
.fgrid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.fcard { border: 1px solid var(--line); background: var(--panel); padding: 16px; display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.fc-media { height: 150px; display: grid; place-items: center; border: 1px solid var(--grid2); background: var(--ground); margin-bottom: 4px; overflow: hidden; }
.fc-media.fc-prev { background: #fff; }
.fc-media img { width: 100%; height: 100%; object-fit: contain; display: block; }
.fc-ic { fill: none; stroke: var(--line); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.fcard h3 { font: 500 14px/1.35 var(--mono); letter-spacing: .04em; text-transform: none; color: var(--line); }
.fcard p { color: var(--dim); font-size: 15px; line-height: 1.5; flex: 1; }
.fc-act { align-self: flex-start; margin-top: 6px; text-decoration: none; display: inline-block; }
.fc-na { font-size: 14px; color: var(--dim); margin-top: 6px; letter-spacing: .04em; }
.lb-list { display: grid; gap: 22px; justify-items: center; align-content: start; width: min(900px, 100%); }
.lb-list figure { margin: 0; display: grid; gap: 8px; justify-items: center; }
.lb-list img { max-height: 80vh; width: auto; max-width: 100%; }
.lb-list figcaption { font: 400 14px/1.4 var(--mono); color: var(--line); text-align: center; }
.lb-overlay { grid-template-rows: auto 1fr; align-content: start; }

/* ---------- C: cost notice ---------- */
.notice { display: flex; gap: 14px; align-items: flex-start; border: 1px solid var(--mark); background: var(--panel); padding: 16px 18px; margin: 0 0 28px; max-width: 78ch; }
.notice svg { flex: none; margin-top: 2px; fill: none; stroke: var(--mark); stroke-width: 1.8; stroke-linecap: round; }
.notice svg circle:last-child { fill: var(--mark); stroke: none; }
.notice p { margin: 0; font-size: 17px; line-height: 1.5; color: var(--line); }

/* ---------- hero: drag hint ---------- */
.drag-hint { position: absolute; z-index: 3; top: 22px; right: max(var(--gutter), calc((100vw - var(--maxw)) / 2)); margin: 0; display: flex; align-items: center; gap: 10px;
  font: 500 14px/1.3 var(--mono); letter-spacing: .02em; color: var(--line); background: rgba(10, 35, 71, .92); border: 1px solid var(--grid2); padding: 9px 14px; pointer-events: none; transition: opacity .45s ease; }
.drag-hint[hidden] { display: none; }
.drag-hint.off { opacity: 0; }
.drag-hint svg { flex: none; fill: none; stroke: var(--mark); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
@media (max-width: 899px) { .drag-hint { top: auto; bottom: 16px; right: var(--gutter); } }

/* ---------- D: the machine ---------- */
.tour { display: block; margin-top: clamp(40px, 6vw, 80px); }
.tour-frame { display: none; }
.tour-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 40px; }
.tour-step { display: grid; gap: 10px; align-content: start; }
.tour-step h3 { font: 800 clamp(34px, 4.6vw, 56px)/1 var(--display); text-transform: uppercase; color: var(--line); letter-spacing: 0; }
.tour-step p:last-child { font-size: 18px; line-height: 1.55; max-width: 44ch; }
.step-no { font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--mark); }
.step-media { border: 1px solid var(--line); background: #eef1f4; margin-bottom: 10px; }
.step-media img { display: block; width: 100%; height: auto; }
@media (min-width: 700px) {
  .tour-step { grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); column-gap: clamp(24px, 4vw, 56px); align-items: center; }
  .tour-step > * { grid-column: 2; }
  .tour-step > .step-media { grid-column: 1; grid-row: 1 / span 3; margin-bottom: 0; }
  .tour-on .tour-step { grid-template-columns: minmax(0, 1fr); }
  .tour-on .tour-step > * { grid-column: 1; }
}
.tour-on .tour { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: clamp(32px, 5vw, 72px); align-items: start; }
.tour-on .tour-frame { display: block; position: sticky; top: calc(var(--bar) + var(--toc) + 24px); aspect-ratio: 7 / 5; border: 1px solid var(--line); background: #eef1f4; overflow: hidden; }
.tour-on .tour-steps { gap: 0; }
.tour-on .tour-step { min-height: 78vh; align-content: center; opacity: .4; transition: opacity .4s ease; }
.tour-on .tour-step.is-active { opacity: 1; }
.tour-on .step-media { display: none; }
.layer { position: absolute; inset: 0; opacity: 0; transition: opacity .55s ease; }
.layer.on { opacity: 1; }
.layer img { width: 100%; height: 100%; object-fit: cover; display: block; }
.layer .pair { height: 100%; }
.layer .pair-imgs { height: 100%; }

/* pen up / pen down pair: default (no JS) shows both side by side */
.pair-imgs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.pair-imgs img { display: block; width: 100%; height: auto; }
.pair-btns { display: none; }
.js .pair-imgs { display: block; position: relative; aspect-ratio: 7 / 5; }
.js .pair-imgs img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.js .p-up { opacity: var(--up, 0); transition: opacity .35s ease; }
.js .pair-btns { display: flex; gap: 10px; padding: 10px; background: var(--panel); border-top: 1px solid var(--line); }
.pair-btns .btn[aria-pressed="true"] { background: var(--mark); color: var(--panel); }
.tour-on .layer .pair-btns { display: none; }

.view { margin: 0; border: 1px solid var(--line); background: var(--panel); min-width: 0; display: flex; flex-direction: column; }
.viewbar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; padding: 10px 12px; }
.viewbar .view-label { margin: 0; }
.vstate { flex: 1 1 220px; font-size: 14px; color: var(--dim); }
#viewer { display: block; width: 100%; aspect-ratio: 16 / 10; background: #eef1f4; touch-action: none; border-bottom: 1px solid var(--line); }
#viewer[hidden] { display: none; }
.img-missing { aspect-ratio: 4 / 3; display: grid; place-items: center; padding: 16px; text-align: center;
  font: 400 13px/1.4 var(--mono); color: var(--dim); background:
  repeating-linear-gradient(45deg, var(--grid) 0 1px, transparent 1px 10px), var(--panel); }

.btn {
  display: inline-flex; align-items: center; gap: 8px; min-height: 44px;
  font: 500 13px/1.2 var(--mono); letter-spacing: .06em; text-transform: uppercase; text-decoration: none;
  color: var(--mark); background: transparent; border: 1.5px solid var(--mark); padding: 10px 16px; cursor: pointer;
}
.btn:hover { background: rgba(255, 210, 122, .12); }
.btn:disabled { opacity: .55; cursor: default; }

/* ---------- E: cards, bars ---------- */
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; align-items: stretch; }
.card { border: 1px solid var(--dim); background: var(--panel); padding: 22px; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.card-rec { border: 1.5px solid var(--mark); }
.card header { display: grid; gap: 4px; }
.card-sub { font: 500 15px/1.3 var(--body); color: var(--dim); }
.card-tag { font: 500 13px/1 var(--mono); color: var(--dim); letter-spacing: .1em; text-transform: uppercase; display: flex; justify-content: space-between; gap: 8px; }
.pick { color: var(--panel); background: var(--mark); padding: 3px 6px; margin: -3px 0; }
.card h3 { font: 800 28px/1.05 var(--display); letter-spacing: .01em; color: var(--line); }
.card-total { margin-top: 10px; font: 800 clamp(44px, 5vw, 64px)/1 var(--display); }
.rows { margin: 12px 0 0; display: grid; }
.rows > div { padding: 10px 0; border-top: 1px solid var(--grid); min-width: 0; }
.rows dt { font: 500 13px/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--dim); }
.rows dd { margin: 3px 0 0; font-size: 15px; line-height: 1.5; overflow-wrap: anywhere; }
.rows ul { margin: 0; padding-left: 1.1em; }
.rows li + li { margin-top: 3px; }
.tbd { color: var(--mark); font-family: var(--mono); font-size: .9em; }

.chart { margin: 0; border: 1px solid var(--line); background: var(--panel); padding: 22px; }
.bars { display: grid; gap: 14px; }
.bar-row { display: grid; grid-template-columns: 170px minmax(0, 1fr) 110px; gap: 14px; align-items: center; }
.bar-label { font-size: 14px; line-height: 1.25; }
.bar-label small { display: block; font: 400 13px/1.3 var(--mono); color: var(--dim); }
.bar-track { position: relative; height: 30px; border-left: 1px solid var(--dim); }
.bar-fill { position: absolute; inset: 3px auto 3px 0; background: var(--line); transform-origin: left center; }
.bar-row.rec .bar-fill { background: var(--mark); }
.bar-row.na .bar-fill { background: transparent; border: 1px dashed var(--dim); width: 100%; }
.bar-val { font: 500 15px/1.2 var(--mono); text-align: right; }
.scale { display: grid; grid-template-columns: 170px minmax(0, 1fr) 110px; gap: 14px; margin-top: 6px; }
.scale-axis { position: relative; height: 22px; border-top: 1px solid var(--dim); font: 400 13px/1 var(--mono); color: var(--dim); }
.scale-axis span { position: absolute; top: 6px; transform: translateX(-50%); white-space: nowrap; }
.scale-axis span::before { content: ""; position: absolute; left: 50%; top: -7px; height: 5px; border-left: 1px solid var(--dim); }
.scale-axis span:first-child { transform: none; }
.scale-axis span:first-child::before { left: 0; }
.savings { margin-top: 18px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.save { border: 1px solid var(--save); padding: 14px 16px; display: grid; gap: 2px; }
.save.neg { border-color: var(--dim); }
.save-amt { font: 800 clamp(36px, 4vw, 52px)/1 var(--display); color: var(--save); }
.save.neg .save-amt { color: var(--line); }
.save-txt { font-size: 14px; }
.save-sub { font: 400 13px/1.4 var(--mono); color: var(--dim); }

.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; align-items: start; }
.panel { border: 1px solid var(--dim); background: var(--panel); padding: 20px 22px; min-width: 0; display: grid; gap: 12px; align-content: start; }
.panel-mark { border-color: var(--mark); border-width: 1.5px; }
.panel-mark h3 { color: var(--mark); }
.panel-mark p { font-size: clamp(18px, 2vw, 24px); line-height: 1.45; max-width: 60ch; }
.plain { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.plain li { font-size: 15px; line-height: 1.5; color: var(--line); }
.plain.mono li { font-size: 13px; display: flex; justify-content: space-between; gap: 12px; border-bottom: 1px dotted var(--grid); padding-bottom: 4px; }
.plain.mono li span:last-child { color: var(--dim); white-space: nowrap; }
.wrong li { position: relative; padding-left: 20px; font-size: 16px; }
.wrong li::before { content: ""; position: absolute; left: 0; top: .6em; width: 10px; border-top: 1.5px solid var(--mark); }

details.more { border: 1px solid var(--grid2); background: var(--panel); }
details.more > summary {
  cursor: pointer; padding: 14px 18px; font: 500 13px/1.3 var(--mono); letter-spacing: .04em; color: var(--line);
  list-style: none; display: flex; gap: 10px; align-items: center;
}
details.more > summary::-webkit-details-marker { display: none; }
details.more > summary::before { content: "+"; color: var(--mark); width: 12px; }
details.more[open] > summary::before { content: "-"; }
details.more > :not(summary) { margin: 0 18px 18px; }
details.more > :not(summary) + :not(summary) { margin-top: 16px; }
details.more .plain { padding-top: 2px; }
details.inline > summary { cursor: pointer; color: var(--mark); font: 500 13px/1.4 var(--mono); }
details.inline > p { margin-top: 6px; font-size: 14px; color: var(--dim); }
details.inline > ul { margin-top: 6px; }
.rows dd > p { margin: 0; }

/* ---------- Tables ---------- */
.table-wrap { max-width: 100%; overflow-x: auto; }
.data { width: 100%; border-collapse: collapse; font-size: 14px; }
.data caption { text-align: left; font: 500 13px/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--dim); padding-bottom: 10px; }
.data th, .data td { text-align: left; padding: 9px 12px 9px 0; border-bottom: 1px solid var(--grid); vertical-align: top; }
.data thead th { font: 500 13px/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--dim); border-bottom: 1px solid var(--dim); }
.data tbody th { font-weight: 500; }
.data .r { text-align: right; padding-right: 0; padding-left: 12px; white-space: nowrap; }
.data .m { font-family: var(--mono); font-size: 13px; }
.data .d { color: var(--dim); font-size: 13px; }
.data tfoot td, .data tfoot th { border-top: 1.5px solid var(--line); border-bottom: 0; font-weight: 500; }
.data.compact { font-size: 13.5px; }
.data.compact th, .data.compact td { padding-block: 7px; }
.specs { border-top: 1.5px solid var(--line); }
.specs tbody { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 40px; }
.specs tbody tr { display: grid; grid-template-columns: 11em minmax(0, 1fr); border-bottom: 1px solid var(--grid); }
.specs tbody th, .specs tbody td { border: 0; padding-block: 12px; }
.specs tbody th { font: 500 13px/1.6 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--dim); }
.stage-table td:first-child { white-space: nowrap; }
.programs .prog { font-family: var(--mono); font-size: 13px; color: var(--mark); white-space: nowrap; }

/* hover and focus: crop-mark corner brackets */
.bracket { position: relative; }
.bracket::after, .data tbody tr > :first-child::after { content: none; }
.bracket::after {
  content: ""; position: absolute; inset: -5px; pointer-events: none; opacity: 0; transition: opacity .2s ease;
  --b: linear-gradient(var(--mark), var(--mark));
  background:
    var(--b) left top / 14px 1px no-repeat, var(--b) left top / 1px 14px no-repeat,
    var(--b) right top / 14px 1px no-repeat, var(--b) right top / 1px 14px no-repeat,
    var(--b) left bottom / 14px 1px no-repeat, var(--b) left bottom / 1px 14px no-repeat,
    var(--b) right bottom / 14px 1px no-repeat, var(--b) right bottom / 1px 14px no-repeat;
}
.bracket:hover::after, .bracket:focus-within::after { opacity: 1; }
@media (hover: hover) {
  .data tbody tr:hover > * {
    --b: linear-gradient(var(--mark), var(--mark));
    background-image: var(--b), var(--b);
    background-repeat: no-repeat;
    background-size: 100% 1px, 100% 1px;
    background-position: left top, left bottom;
    background-color: rgba(255, 210, 122, .05);
  }
}

/* ---------- J: sign-off ---------- */
.signblock { border: 2px solid var(--line); background: var(--panel); box-shadow: inset 0 0 0 5px var(--ground), inset 0 0 0 6px var(--grid2); padding: 8px; }
.sb-row { display: grid; grid-template-columns: clamp(110px, 16vw, 200px) minmax(0, 1fr); border-top: 1px solid var(--grid2); min-height: 64px; align-items: center; }
.sb-row:first-child { border-top: 0; }
.sb-k { padding: 14px 18px; font-size: 13px; letter-spacing: .16em; color: var(--dim); border-right: 1px solid var(--grid2); align-self: stretch; display: flex; align-items: center; }
.sb-v { padding: 14px 18px; font-size: clamp(15px, 1.8vw, 20px); line-height: 1.4; }
.sb-big { font: 800 clamp(40px, 6vw, 80px)/1 var(--display); color: var(--mark); }
.sb-sig { min-height: 92px; }
.sb-blank { align-self: end; margin: 0 18px 18px; padding: 0; border-bottom: 1.5px solid var(--line); height: 38px; }

/* ---------- Footer ---------- */
/* ---------- Hero (tab A): the 3D model is the background layer ---------- */
.hero { position: relative; overflow: hidden; background: var(--ground); isolation: isolate; border-bottom: 1.5px solid var(--line); }
.hero-bg { position: absolute; left: 0; right: 0; top: -50%; height: 150%; z-index: 0; will-change: transform; }
.hero-model { position: absolute; left: 0; right: 0; bottom: 0; height: 66.6667%; }
.hero-poster { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 70% 50%; opacity: .9; }
#hero-3d { position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: pan-y; cursor: grab; }
#hero-3d[hidden] { display: none; }
#hero-3d:active { cursor: grabbing; }
.hero.live .hero-poster { display: none; }
.hero-shade { position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(90deg, var(--ground) 0, var(--ground) 38%, rgba(14, 44, 87, .86) 52%, rgba(14, 44, 87, .0) 78%); }
.hero-in { position: relative; z-index: 2; pointer-events: none; min-height: calc(100vh - var(--bar) - var(--toc)); display: flex; flex-direction: column; justify-content: center; padding-block: 40px 24px; }
.hero-copy { max-width: 700px; }
.kicker { font: 500 13px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--mark); margin-bottom: 18px; }
h1 { font-family: var(--display); font-weight: 800; text-transform: uppercase; font-size: clamp(52px, 8vw, 112px); line-height: .88; letter-spacing: .005em; }
.h1-size { display: block; color: var(--mark); }
.lede { margin-top: 20px; color: var(--dim); font-size: 17px; max-width: 46ch; }
.headline { margin: 28px 0 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); }
.stat { padding: 14px 14px 0 0; min-width: 0; }
.stat + .stat { padding-left: 14px; border-left: 1px solid var(--grid2); }
.stat dt { font: 500 13px/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--dim); }
.stat dd { margin: 6px 0 0; display: grid; gap: 4px; }
.big { font-family: var(--display); font-weight: 800; font-size: clamp(34px, 3.8vw, 52px); line-height: 1; letter-spacing: .01em; }
.when { font: 400 13px/1.4 var(--mono); color: var(--dim); }
.titleblock { margin-top: clamp(24px, 3vw, 40px); display: grid; grid-template-columns: 2.4fr repeat(5, minmax(0, 1fr)); border: 1.5px solid var(--line); background: var(--panel); }
.tb-cell { padding: 8px 12px; min-width: 0; border-left: 1px solid var(--grid2); display: grid; gap: 2px; }
.tb-cell:first-child { border-left: 0; }
.tb-cell span { font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--dim); }
.tb-cell b { font-weight: 500; font-size: 14px; display: flex; align-items: center; gap: 6px; }
.revtri { width: 16px; height: 14px; fill: none; stroke: var(--mark); stroke-width: 1.5; }
.cue { margin-top: 18px; display: flex; align-items: center; justify-content: center; gap: 10px; font-size: 13px; letter-spacing: .2em; color: var(--dim); }
.cue-line { position: relative; width: 1px; height: 34px; background: var(--dim); }
.cue-line::after { content: ""; position: absolute; left: -3.5px; bottom: -1px; border: 4px solid transparent; border-top: 7px solid var(--dim); border-bottom: 0; }

/* ---------- Exploded views ---------- */
.exp { display: grid; gap: 16px; }
.exp-sel { display: flex; flex-wrap: wrap; gap: 8px; }
.exp-sel .btn { min-height: 38px; padding: 6px 12px; font-size: 13px; }
.exp-sel .btn[aria-pressed="true"] { background: var(--mark); color: var(--panel); }
.exp-body { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: 20px; align-items: start; }
.exp-fig { margin: 0; border: 1px solid var(--line); background: #f4f6f8; }
.exp-fig img { display: block; width: 100%; height: auto; }
.exp-fig figcaption { padding: 10px 14px; background: var(--panel); border-top: 1px solid var(--line); font: 500 13px/1.4 var(--mono); color: var(--dim); }
.exp-parts { width: 100%; }
.exp-parts .n { font-family: var(--mono); color: var(--mark); white-space: nowrap; }

.explode { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; color: var(--dim); }
.explode input { width: 160px; accent-color: var(--mark); }
.explode[hidden] { display: none; }

/* ---------- Made parts, program preview ---------- */
.blk-h { margin-bottom: 4px; }
.made .grp th { color: var(--mark); font: 500 13px/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase; padding-top: 16px; border-bottom: 1px solid var(--mark); }
.programs tbody tr { cursor: default; }
.programs tbody tr:focus-visible { outline: 2px solid var(--mark); outline-offset: -2px; }
.prog-pv { position: fixed; left: 0; top: 0; z-index: 70; width: 520px; max-width: calc(100vw - 24px); pointer-events: none; background: #fff; border: 1.5px solid var(--mark); box-shadow: 0 10px 30px rgba(0, 0, 0, .45); opacity: 0; transition: opacity .18s ease; }
.prog-pv.on { opacity: 1; }
.prog-pv[hidden] { display: none; }
.prog-pv img { display: block; width: 100%; height: auto; }
.pv-overlay { position: fixed; inset: 0; z-index: 80; background: rgba(5, 16, 36, .94); display: grid; grid-template-rows: auto 1fr; justify-items: center; padding: 12px; gap: 12px; overflow: auto; }
.pv-overlay[hidden] { display: none; }
.pv-overlay img { max-width: 100%; max-height: 100%; background: #fff; align-self: center; }
.pv-close { justify-self: end; background: var(--panel); }

/* ---------- Others table ---------- */
.others { font-size: 15px; }
.others thead th { padding-bottom: 10px; }
.others th, .others td { padding: 12px 18px 12px 0; line-height: 1.5; }
.others .name { max-width: 18ch; font-weight: 500; overflow-wrap: anywhere; }
.others .price { text-align: right; padding-left: 20px; padding-right: 28px; white-space: nowrap; font: 500 15px/1.5 var(--mono); }
.others td.d { color: var(--dim); font-size: 15px; }
.others td.d.notes { min-width: 24ch; }

.foot { margin-top: clamp(64px, 9vw, 120px); border-top: 1.5px solid var(--line); background: var(--panel); }
.foot-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; padding-block: 22px 30px; font-size: 13px; color: var(--dim); }

/* ---------- Reduced motion: everything final, nothing moves ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .bg { transform: none !important; }
}

/* ---------- Responsive ---------- */
@media (max-width: 899px) {
  .hero-in { min-height: 0; padding-bottom: 66vw; }
  .hero-model { height: 66.6667%; }
  .hero-shade { background: linear-gradient(180deg, var(--ground) 0, var(--ground) 52%, rgba(14, 44, 87, .0) 90%); }
  .cue { display: none; }
  .exp-body { grid-template-columns: minmax(0, 1fr); }
  .fgrid { grid-template-columns: minmax(0, 1fr); }
  .cards { grid-template-columns: minmax(0, 1fr); }
  .two { grid-template-columns: minmax(0, 1fr); }
  .titleblock { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .tb-title { grid-column: 1 / -1; border-bottom: 1px solid var(--grid); }
  .tb-cell:nth-child(2) { border-left: 0; }
  .specs tbody { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .headline { grid-template-columns: minmax(0, 1fr); }
  .stat, .stat + .stat { padding: 12px 0; border-left: 0; border-bottom: 1px solid var(--grid); display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
  .stat dt { flex: 0 1 9em; }
  .stat dd { flex: 1 1 auto; justify-items: end; text-align: right; }
  .big { font-size: 40px; }
  .titleblock { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .tb-cell:nth-child(5) { border-left: 0; }
  .tb-cell:nth-child(n+5) { border-top: 1px solid var(--grid); }
  .notes td { font-size: 17px; }
  .bar-row, .scale { grid-template-columns: minmax(0, 1fr) auto; gap: 6px 12px; }
  .bar-label { grid-column: 1; }
  .bar-val { grid-column: 2; grid-row: 1; }
  .bar-track { grid-column: 1 / -1; }
  .scale > :first-child, .scale > :last-child { display: none; }
  .scale-axis { grid-column: 1 / -1; }
  .savings { grid-template-columns: minmax(0, 1fr); }
  .card { padding: 16px; }
  .chart { padding: 16px; }
  .sb-row { grid-template-columns: minmax(0, 1fr); }
  .sb-k { border-right: 0; padding: 10px 14px 0; }
  .sb-v { padding: 4px 14px 12px; }
  .sb-blank { margin: 0 14px 14px; }
  .specs tbody tr { grid-template-columns: 8.5em minmax(0, 1fr); }
  /* stacked tables: one record per block */
  .data.stack thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
  .data.stack tr { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2px 12px; padding: 10px 0; border-bottom: 1px solid var(--grid); }
  .data.stack td, .data.stack th { display: block; border: 0; padding: 0; }
  .data.stack .r { padding: 0; text-align: right; }
  .data.stack .full { grid-column: 1 / -1; }
  .data.stack tfoot tr { border-top: 1.5px solid var(--line); border-bottom: 0; }
  .data.stack tfoot td { border: 0; }
  .programs th, .programs td { padding-right: 8px; }
  .stage-table tbody tr > :nth-child(4) { grid-column: 2; grid-row: 1; }
  .stage-table tbody th { grid-column: 1 / -1; }
  .programs .hide-sm { display: none; }
  .tabs a { padding: 0 14px; }
  .sec > .wrap { border-inline: 0; }
  .hero-in { padding-bottom: 72vw; }
  /* other pre-built machines and made parts: one stacked card each */
  .others thead, .made thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
  .others, .others tbody, .others tr, .others td, .others th, .made, .made tbody, .made tr, .made td, .made th { display: block; width: 100%; }
  .others tr, .made tr { border: 1px solid var(--grid2); background: var(--panel); padding: 14px; margin-bottom: 14px; }
  .made tr.grp { border: 0; background: none; padding: 0; margin: 0; }
  .others th, .others td, .made th, .made td { border: 0; padding: 4px 0; max-width: none; }
  .others .name, .made .pname { font-size: 17px; }
  .others .price { text-align: left; padding: 4px 0; font-size: 18px; }
  .others td[data-label]::before, .made td[data-label]::before { content: attr(data-label); display: block; font: 500 13px/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--mark); margin-top: 6px; }
  .made td.r { text-align: left; }
  .made th, .made td, .programs th, .programs td { padding-right: 10px; }
}
@media (max-width: 420px) {
  .titleblock { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tb-cell:nth-child(n) { border-left: 0; border-top: 1px solid var(--grid); }
  .tb-cell:nth-child(odd):not(:first-child) { border-left: 1px solid var(--grid); }
  .tb-cell:first-child { border-top: 0; }
}

@media print {
  .bg, .dimbar, .tabs, .cue, .prog-pv, .pv-overlay { display: none; }
  .draft, .skip, #open3d { display: none; }
}

/* reveals (setupReveals): only when JS and motion are on; otherwise everything is in its final state */
.motion .rv { opacity: .4; transform: translateY(16px); transition: opacity .7s ease, transform .7s ease; }
.motion .rv.in { opacity: 1; transform: none; }
.motion .dl-anim .dl-line { clip-path: inset(0 100% 0 0); transition: clip-path .9s cubic-bezier(.2,.7,.2,1); }
.motion .dl-anim.in .dl-line { clip-path: inset(0 0 0 0); }
.motion .dl-anim .dl-end { transform: scaleY(0); transition: transform .25s ease .85s; }
.motion .dl-anim.in .dl-end { transform: scaleY(1); }
.motion .bars-anim .bar-row:not(.na) .bar-fill { transform: scaleX(.06); transition: transform 1.1s cubic-bezier(.2,.7,.2,1); }
.motion .bars-anim.in .bar-row:not(.na) .bar-fill { transform: scaleX(1); }

/* made parts: real gaps between columns (qty was butting into process) */
.made th, .made td { padding-left: 14px; }
.made th:first-child, .made td:first-child, .made tr > :first-child { padding-left: 0; }
.made td.r, .made th.r { text-align: center; }
@media (max-width: 640px) {
  .made th, .made td, .made tr > :first-child { padding-left: 0; }
  .made td.r { text-align: left; }
}
.made td[data-label="Size (in)"] { white-space: nowrap; }
/* hero figures: two columns, the DIY range stays on one line */
.headline { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
.headline dt { white-space: nowrap; letter-spacing: .06em; }
.headline .big { font-size: clamp(34px, 3.4vw, 50px); }
#diy-range { white-space: nowrap; }
.stat + .stat { padding-left: 28px; }
@media (max-width: 640px) { .headline { grid-template-columns: minmax(0, 1fr); } .headline dt { white-space: normal; } .stat + .stat { padding-left: 0; } }
/* exploded parts list: gap between qty and kind (they were running together) */
.exp-parts th, .exp-parts td { padding-left: 14px; }
.exp-parts tr > :first-child { padding-left: 0; }

/* hero 3D: only a box around the model takes the mouse; text stays selectable and the page always scrolls */
#hero-3d { pointer-events: none; cursor: default; }
.hero-in { pointer-events: auto; }
.hero-zone { position: absolute; z-index: 3; cursor: grab; touch-action: pan-y; }
.hero-zone:active { cursor: grabbing; }