/* The channel's drafting-sheet look, same tokens as the video engine (skill/engine/drafting.js):
   vellum paper, faint 24 px grid with a heavier line every 120, blue-black ink, blue construction line, one red accent.
   Dark mode is the same sheet as a blueprint. */
:root {
  --paper: #f3f1ea; --sheet: #f7f5ef; --ink: #1d2733; --line: #2f5d8a; --dim: #6b7785; --faint: #9aa3ad;
  --accent: #d6334a; --hi: #fff8d8; --grid: 40, 70, 110; --rule: rgba(29, 39, 51, .55); --card: #fbfaf6;
  --mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace; --sans: "Inter", system-ui, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --paper: #0f2a47; --sheet: #12304f; --ink: #e9f1fb; --line: #8fc1ff; --dim: #a9bed6; --faint: #6f8bab;
  --accent: #ff6b7d; --hi: #1b3d63; --grid: 180, 210, 255; --rule: rgba(233, 241, 251, .5); --card: #143558; color-scheme: dark; } }
:root[data-theme="dark"] {
  --paper: #0f2a47; --sheet: #12304f; --ink: #e9f1fb; --line: #8fc1ff; --dim: #a9bed6; --faint: #6f8bab;
  --accent: #ff6b7d; --hi: #1b3d63; --grid: 180, 210, 255; --rule: rgba(233, 241, 251, .5); --card: #143558; color-scheme: dark; }

* { box-sizing: border-box; }
html { background: var(--paper); }
body {
  margin: 0; color: var(--ink); font: 16px/1.55 var(--sans); background-color: var(--paper);
  background-image:
    linear-gradient(rgba(var(--grid), .10) 1px, transparent 1px), linear-gradient(90deg, rgba(var(--grid), .10) 1px, transparent 1px),
    linear-gradient(rgba(var(--grid), .05) 1px, transparent 1px), linear-gradient(90deg, rgba(var(--grid), .05) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
}
a { color: var(--line); }
img { max-width: 100%; display: block; }
.mono { font-family: var(--mono); }

/* the sheet: a ruled border with zone marks, like the video frame */
.sheet { position: relative; max-width: 1240px; margin: 22px auto 40px; padding: 34px 40px 40px; border: 2px solid var(--rule); background: transparent; }
.sheet::before { content: ""; position: absolute; inset: 6px; border: 1px solid var(--rule); pointer-events: none; }
.zones { position: absolute; font: 600 10px var(--mono); color: var(--faint); letter-spacing: .1em; pointer-events: none; }
.zones.top { top: -1px; left: 0; right: 0; display: flex; justify-content: space-around; transform: translateY(-120%); }
.zones.side { top: 0; bottom: 0; left: -1px; display: flex; flex-direction: column; justify-content: space-around; transform: translateX(-160%); }

/* header: name + nav set like a drawing's title strip */
.top { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; padding-bottom: 14px; border-bottom: 1px solid var(--rule); }
.brand { text-decoration: none; color: var(--ink); display: flex; flex-direction: column; gap: 5px; }
.brand .logo { display: block; height: 40px; width: auto; max-width: 100%; }
.brand span { font: 500 11px var(--mono); color: var(--dim); letter-spacing: .16em; text-transform: uppercase; padding-left: calc(40px * 164.4 / 124); }
.top nav { display: flex; gap: 6px; flex-wrap: wrap; }
.top nav a { font: 600 12px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ink); text-decoration: none; padding: 8px 12px; border: 1px solid transparent; }
.top nav a:hover { border-color: var(--rule); }
.top nav a.cta { background: var(--accent); color: #fff; }

.tag { display: inline-block; font: 600 11px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--accent); }
h1, h2, h3 { font-family: var(--mono); line-height: 1.15; margin: 0; letter-spacing: -.01em; }
h1 { font-size: clamp(28px, 5vw, 50px); font-weight: 700; }
h2 { font-size: clamp(20px, 3vw, 28px); font-weight: 700; }
h3 { font-size: 17px; font-weight: 700; }
.lede { font-size: 18px; color: var(--dim); max-width: 62ch; margin: 14px 0 0; }
section { margin-top: 46px; }
.head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.head .note { font: 500 12px var(--mono); color: var(--dim); }

/* hero */
.hero { display: grid; grid-template-columns: 1.25fr 1fr; gap: 34px; align-items: center; margin-top: 30px; }
.hero figure { margin: 0; position: relative; border: 1px solid var(--rule); background: var(--card); }
.hero figure img { height: auto; aspect-ratio: 16 / 9; object-fit: cover; width: 100%; }
.balloon { position: absolute; font: 700 12px var(--mono); background: var(--sheet); border: 1.5px solid var(--ink); border-radius: 999px; padding: 3px 9px; }

/* forms */
form.signup { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 18px; }
input, textarea, button { font: inherit; }
input[type=email], input[type=text], textarea {
  flex: 1 1 220px; min-width: 0; padding: 12px 14px; border: 1.5px solid var(--ink); background: var(--sheet); color: var(--ink); border-radius: 0; }
textarea { width: 100%; min-height: 84px; resize: vertical; }
input:focus, textarea:focus, button:focus-visible { outline: 3px solid var(--line); outline-offset: 1px; }
button, .btn {
  font: 700 13px var(--mono); letter-spacing: .08em; text-transform: uppercase; padding: 12px 18px; cursor: pointer;
  background: var(--accent); color: #fff; border: 1.5px solid var(--accent); text-decoration: none; display: inline-block; text-align: center; }
.btn.ghost, button.ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.fine { font: 500 12px var(--mono); color: var(--dim); margin-top: 8px; }
.msg { font: 600 13px var(--mono); margin-top: 8px; min-height: 1.2em; }
.msg.ok { color: var(--line); } .msg.err { color: var(--accent); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* gallery cards: each one a small drawing sheet with its own title block */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr)); gap: 22px; }
.card { display: flex; flex-direction: column; text-decoration: none; color: var(--ink); border: 1.5px solid var(--ink); background: var(--card); transition: transform .15s; }
.card:hover { transform: translateY(-3px); }
.card img { height: auto; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-bottom: 1.5px solid var(--ink); }
.card .body { padding: 14px 16px 12px; flex: 1; }
.card p { margin: 6px 0 0; color: var(--dim); font-size: 14px; }
.tb { display: grid; grid-template-columns: 1.4fr .6fr 1fr; border-top: 1.5px solid var(--ink); font: 500 10px var(--mono); letter-spacing: .06em; }
.tb div { padding: 5px 8px; border-left: 1px solid var(--ink); text-transform: uppercase; color: var(--dim); }
.tb div:first-child { border-left: 0; }
.tb b { display: block; color: var(--ink); font-size: 12px; letter-spacing: .02em; }
.pill { font: 700 10px var(--mono); letter-spacing: .1em; text-transform: uppercase; padding: 2px 7px; border: 1px solid currentColor; color: var(--line); }
.pill.new { color: var(--accent); }

/* signup band */
.band { border: 1.5px solid var(--ink); background: var(--hi); padding: 26px 28px; display: grid; grid-template-columns: 1fr 1.1fr; gap: 24px; align-items: center; }
.band h2 { font-size: 24px; }

/* idea board */
.board { display: grid; grid-template-columns: 1.2fr 1fr; gap: 26px; align-items: start; }
.ideas { list-style: none; margin: 0; padding: 0; border-top: 1.5px solid var(--ink); }
.ideas li { display: grid; grid-template-columns: 64px 1fr auto; gap: 12px; align-items: center; padding: 12px 4px; border-bottom: 1px solid var(--rule); }
.votes { font: 700 22px var(--mono); text-align: center; line-height: 1; }
.votes small { display: block; font: 500 9px var(--mono); color: var(--dim); letter-spacing: .1em; margin-top: 3px; }
.ideas .what b { font-family: var(--mono); }
.ideas .what span { display: block; color: var(--dim); font-size: 13px; }
.ideas button { padding: 8px 12px; font-size: 11px; }
.ideas li.voted button { background: transparent; color: var(--line); border-color: var(--line); }
.empty { color: var(--dim); font: 500 13px var(--mono); padding: 14px 4px; }
.panel { border: 1.5px solid var(--ink); background: var(--card); padding: 20px; }
.panel label { display: block; font: 600 11px var(--mono); letter-spacing: .08em; text-transform: uppercase; margin: 12px 0 6px; }
.panel label:first-of-type { margin-top: 4px; }
.panel input { width: 100%; }
.panel label.check input { width: auto; margin-top: 3px; flex: none; }
.panel label.check, .check { display: flex; gap: 8px; align-items: flex-start; font-size: 14px; margin-top: 10px; text-transform: none; letter-spacing: 0; font-family: var(--sans); font-weight: 500; }

/* model page */
.dwg { display: grid; grid-template-columns: 1fr auto; gap: 20px; align-items: end; margin-top: 26px; }
.tblock { display: grid; grid-template-columns: repeat(4, auto); border: 1.5px solid var(--ink); font: 500 10px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--dim); }
.tblock div { padding: 6px 12px; border-left: 1px solid var(--ink); }
.tblock div:first-child { border-left: 0; }
.tblock b { display: block; color: var(--ink); font-size: 13px; letter-spacing: .02em; }
.stage { position: relative; margin-top: 20px; border: 1.5px solid var(--ink); background: #111; aspect-ratio: 16 / 9; overflow: hidden; }
.stage img { width: 100%; height: 100%; object-fit: cover; opacity: .9; }
.stage iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; background: #fff; }
.stage .start { position: absolute; inset: 0; display: grid; place-items: center; background: linear-gradient(transparent, rgba(0,0,0,.35)); }
.stage .start div { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.stagebar { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-top: 8px; font: 500 12px var(--mono); color: var(--dim); }
.cols { display: grid; grid-template-columns: 1.5fr 1fr; gap: 30px; margin-top: 34px; align-items: start; }
.video { aspect-ratio: 16 / 9; border: 1.5px solid var(--ink); background: var(--card); display: grid; place-items: center; text-align: center; padding: 20px; }
.video iframe { width: 100%; height: 100%; border: 0; }
.notes { border-top: 1.5px solid var(--ink); margin: 0; padding: 0; list-style: none; }
.notes li { display: flex; justify-content: space-between; gap: 12px; padding: 9px 2px; border-bottom: 1px solid var(--rule); font-size: 14px; }
.notes li b { font-family: var(--mono); font-size: 13px; }
.notes .n { display: inline-grid; place-items: center; width: 22px; height: 22px; border: 1.5px solid var(--ink); border-radius: 50%; font: 700 11px var(--mono); margin-right: 8px; }

/* sticky signup strip (dismissible) */
.sticky { position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 20; max-width: 760px; margin: 0 auto; display: none; gap: 10px; align-items: center;
  padding: 10px 12px; background: var(--sheet); border: 1.5px solid var(--ink); box-shadow: 4px 4px 0 var(--ink); }
.sticky.on { display: flex; }
.sticky p { margin: 0; font: 600 13px var(--mono); flex: 1 1 200px; }
.sticky form { display: flex; gap: 6px; flex: 1 1 300px; margin: 0; }
.sticky input { padding: 9px 10px; }
.sticky button { padding: 9px 12px; }
.sticky .x { background: none; border: 0; color: var(--dim); font-size: 20px; padding: 0 4px; }

footer { margin-top: 56px; padding-top: 14px; border-top: 1px solid var(--rule); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font: 500 12px var(--mono); color: var(--dim); }
footer a { color: var(--dim); }

@media (max-width: 860px) {
  .hero, .band, .board, .cols, .dwg { grid-template-columns: 1fr; }
  .tblock { grid-template-columns: repeat(2, 1fr); }
  .tblock div:nth-child(3) { border-left: 0; }
  .tblock div:nth-child(n+3) { border-top: 1px solid var(--ink); }
}
@media (max-width: 600px) {
  .sheet { margin: 10px 8px 24px; padding: 22px 16px 26px; }
  .zones { display: none; }
  .top nav a { padding: 6px 8px; font-size: 11px; }
  .band { padding: 20px 16px; }
  .ideas li { grid-template-columns: 48px 1fr; }
  .ideas li button { grid-column: 2; justify-self: start; }
  .sticky { left: 8px; right: 8px; bottom: 8px; flex-wrap: wrap; }
}

/* model page article (built from content/<slug>.md) */
.crumbs { margin-top: 18px; font: 500 12px var(--mono); color: var(--dim); }
.crumbs a { color: var(--dim); }
.lead { color: var(--ink); max-width: 68ch; }
.draft { margin: 22px 0 0; padding: 12px 16px; border: 1.5px dashed var(--accent); background: var(--hi); font-size: 14px; max-width: 80ch; }
.cols.article { grid-template-columns: minmax(0, 1fr) 300px; gap: 44px; }
.prose { max-width: 72ch; font-size: 17px; line-height: 1.65; }
.prose-sec { margin-top: 0; padding-top: 6px; }
.prose-sec + .prose-sec { margin-top: 40px; }
.prose h2 { margin-bottom: 14px; padding-bottom: 8px; border-bottom: 1px solid var(--rule); }
.prose h3 { margin: 24px 0 6px; }
.prose p { margin: 0 0 14px; }
.prose ol, .prose ul { margin: 0 0 14px; padding-left: 1.3em; }
.prose li { margin-bottom: 8px; }
.prose li::marker { font: 700 14px var(--mono); color: var(--accent); }
.prose .notes { margin-bottom: 12px; font-size: 15px; }
.prose .notes li::marker { content: none; }
.prose .video { margin-bottom: 8px; }
.prose .grid.related { grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr)); gap: 16px; }
.prose .related .card p { display: none; }
.chapters { font: 500 14px var(--mono); }
aside .aside-in { position: sticky; top: 16px; }
.toc ol { list-style: none; margin: 8px 0 0; padding: 0; border-top: 1.5px solid var(--ink); }
.toc li { border-bottom: 1px solid var(--rule); }
.toc a { display: block; padding: 7px 2px; font: 500 13px var(--mono); color: var(--ink); text-decoration: none; }
.toc a:hover { color: var(--accent); }
@media (max-width: 860px) {
  .cols.article { grid-template-columns: 1fr; }
  aside .aside-in { position: static; }
  .toc { display: none; }
  .prose { font-size: 16px; }
}
.priv { flex-basis: 100%; font: 500 11px var(--mono); color: var(--dim); margin-top: 2px; }
.panel .priv { display: block; margin-top: 8px; }
.sticky p a { color: var(--dim); font-weight: 500; }
.ts:empty { display: none; }

/* live model: loader, full screen */
.stage .loader { position: absolute; inset: 0; display: grid; place-items: center; background: color-mix(in srgb, var(--paper) 88%, transparent); z-index: 2; }
.stage .loader[hidden], .stage .start[hidden], .stage .fsx[hidden], .lfail[hidden] { display: none; }
.lbox { width: min(440px, 86%); border: 1.5px solid var(--ink); background: var(--sheet); padding: 18px 20px; box-shadow: 4px 4px 0 var(--ink); }
.lbox .lmsg { display: block; font: 700 16px var(--mono); margin: 6px 0 12px; }
.lbar { position: relative; height: 8px; border: 1.5px solid var(--ink); overflow: hidden;
  background: repeating-linear-gradient(90deg, transparent 0 9px, var(--rule) 9px 10px); }
.lbar i { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--accent); transition: width .15s linear; }
.lbar i.busy { width: 100% !important; background: linear-gradient(90deg, var(--accent) 0 30%, transparent 30% 100%); background-size: 200% 100%; animation: lbusy 1.1s linear infinite; }
@keyframes lbusy { from { background-position: 100% 0; } to { background-position: -100% 0; } }
@media (prefers-reduced-motion: reduce) { .lbar i.busy { animation: none; background: var(--accent); } }
.lnum { display: block; margin-top: 8px; font: 500 12px var(--mono); color: var(--dim); }
.lfail { margin: 12px 0 0; font-size: 14px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.lfail button { padding: 8px 12px; font-size: 11px; }
.stage .fsx { position: absolute; right: 10px; bottom: 10px; z-index: 3; padding: 6px 10px; font-size: 10px; background: var(--ink); color: var(--paper); border-color: var(--ink); opacity: .75; }
.stage.fs, .stage:fullscreen { aspect-ratio: auto; width: 100vw; height: 100vh; border: 0; margin: 0; }
.stagebar .sbtn { display: inline-flex; gap: 6px; align-items: baseline; flex-wrap: wrap; }
button.link { background: none; border: 0; padding: 0; font: inherit; color: var(--line); text-decoration: underline; letter-spacing: 0; text-transform: none; cursor: pointer; }