/* Fort to Scale - a drawing office: tracing-paper cream and drafting ink by day, blueprint blue by night. */
:root {
  --bg: #efebe0; --card: #fbfaf5; --ink: #1b2a3a; --soft: #55697c; --line: #c9c2ae; --rule: #e2dccb;
  --blue: #2d6aa3; --blue-bg: #dfe9f3; --red: #b73a26; --red-bg: #f6e1dc; --green: #3f6d22; --green-bg: #e3eed8; --amber: #96590a; --amber-bg: #f6ead2;
  --btn: #fbfaf5; --btn-ink: #1b2a3a; --solid: #1b2a3a; --solid-ink: #fbfaf5; --grid: rgba(45, 106, 163, 0.07);
}
:root[data-theme="dark"] {
  --bg: #0b1d2e; --card: #10283f; --ink: #e8f1fa; --soft: #a7c0d6; --line: #2b4a68; --rule: #1d3a57;
  --blue: #8cc0ee; --blue-bg: #17395a; --red: #ff9f8c; --red-bg: #47231f; --green: #b8dc8f; --green-bg: #213a20; --amber: #ffd27a; --amber-bg: #3d3115;
  --btn: #143250; --btn-ink: #e8f1fa; --solid: #e8f1fa; --solid-ink: #0b1d2e; --grid: rgba(140, 192, 238, 0.06);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 "Helvetica Neue", Helvetica, Arial, sans-serif;
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px); background-size: 24px 24px; }
a { color: var(--blue); }
.hidden { display: none !important; }
.small { font-size: 0.86rem; }
.muted { color: var(--soft); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.top { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 12px; padding: 10px 16px; background: var(--card); border-bottom: 2px solid var(--ink); }
.back { text-decoration: none; color: var(--soft); font-size: 0.9rem; white-space: nowrap; }
.brand { display: flex; align-items: center; gap: 8px; font-size: 1.05rem; letter-spacing: 0.02em; text-transform: uppercase; min-width: 0; }
.brand strong { white-space: nowrap; }
.logo { width: 32px; height: 24px; flex: none; }
.logo path { fill: none; stroke-linecap: round; }
.lg-r { stroke: var(--blue); stroke-width: 2.4; }
.lg-f { stroke: var(--ink); stroke-width: 2.4; }
.lg-d { stroke: var(--soft); stroke-width: 1; stroke-dasharray: 2 1.5; }
.session { margin-left: auto; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.chip-s { font-size: 0.8rem; padding: 3px 8px; border: 1px solid var(--line); border-radius: 2px; color: var(--soft); white-space: nowrap; }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 34px; padding: 5px 12px; border: 1.5px solid var(--ink); border-radius: 2px; background: var(--btn); color: var(--btn-ink);
  font: inherit; font-size: 0.9rem; text-decoration: none; cursor: pointer; white-space: nowrap; }
.btn:hover:not(:disabled) { background: var(--blue-bg); }
.btn.solid { background: var(--solid); color: var(--solid-ink); }
.btn.solid:hover:not(:disabled) { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn.tiny { min-height: 28px; padding: 2px 9px; font-size: 0.8rem; }
.btn.big { min-height: 44px; padding: 8px 18px; font-size: 1rem; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn:focus-visible, .inp:focus-visible, .sample:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

main { max-width: 1180px; margin: 0 auto; padding: 18px 16px 30px; }
.hero { padding: 8px 0 14px; }
.eyebrow { margin: 0; color: var(--blue); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; }
h1 { margin: 4px 0 6px; font-size: clamp(2rem, 6vw, 3.1rem); line-height: 1.05; letter-spacing: 0.01em; text-transform: uppercase; font-family: "Arial Narrow", "Helvetica Neue", Arial, sans-serif; font-stretch: condensed; }
h1 .sub { display: block; margin-top: 8px; font-size: clamp(1rem, 2.4vw, 1.2rem); font-weight: 400; text-transform: none; letter-spacing: 0; color: var(--soft); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; line-height: 1.35; }
.lede { max-width: 780px; margin: 0 0 12px; }
.samples { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.sample { border: 1px dashed var(--soft); background: transparent; color: var(--ink); border-radius: 2px; padding: 5px 10px; font: inherit; font-size: 0.86rem; cursor: pointer; }
.sample:hover { border-style: solid; background: var(--blue-bg); }
.sample.on { border-style: solid; border-color: var(--blue); background: var(--blue-bg); font-weight: 600; }

.card { background: var(--card); border: 1.5px solid var(--ink); border-radius: 2px; padding: 16px; margin: 0 0 16px; box-shadow: 3px 3px 0 var(--line); min-width: 0; }
.ch { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 0 0 12px; font-size: 1.05rem; text-transform: uppercase; letter-spacing: 0.04em; }
.no { display: inline-flex; width: 24px; height: 24px; align-items: center; justify-content: center; border: 1.5px solid var(--ink); border-radius: 50%; font-size: 0.8rem; }
.free, .paid { font-size: 0.68rem; letter-spacing: 0.1em; padding: 2px 6px; border-radius: 2px; }
.free { background: var(--green-bg); color: var(--green); }
.paid { background: var(--amber-bg); color: var(--amber); }
.actions { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin: 10px 0 0; }

.sheet-card { padding: 10px; }
.sheet-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid var(--line); }
.sheet { min-width: 720px; line-height: 0; }
.sheet svg { display: block; width: 100%; height: auto; }
.legend { display: flex; flex-wrap: wrap; gap: 4px 14px; margin: 8px 2px 0; }
.legend .li { display: inline-flex; align-items: center; gap: 5px; }
.lg { display: inline-block; width: 18px; height: 10px; border-radius: 1px; }
.lg-fab { background: var(--blue-bg); border: 1.5px solid var(--blue); }
.lg-plc { border: 1.5px dashed var(--green); }
.lg-clip { width: 10px; border: 1.5px solid var(--ink); border-radius: 50%; }
.lg-red { border-bottom: 2px solid var(--red); height: 6px; }
.lg-door { border-bottom: 3px double var(--amber); height: 6px; }

.bench { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.fld { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.fld.wide { grid-column: 1 / -1; }
.lab { display: block; font-size: 0.86rem; font-weight: 600; margin: 8px 0 3px; }
.fld .lab { margin-top: 0; }
.inp { width: 100%; min-width: 0; padding: 7px 9px; border: 1.5px solid var(--line); border-radius: 2px; background: var(--bg); color: var(--ink); font: inherit; font-size: 0.95rem; }
select.inp { padding: 6px; }
textarea.inp { font-family: "SFMono-Regular", Menlo, Consolas, monospace; font-size: 0.86rem; line-height: 1.5; resize: vertical; }
.note { margin: 10px 0 0; padding: 8px 10px; border-left: 3px solid var(--amber); background: var(--amber-bg); font-size: 0.88rem; }

.numbers { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.num { border: 1px solid var(--line); padding: 8px; text-align: center; min-width: 0; }
.num b { display: block; font-size: 1.25rem; font-family: "Arial Narrow", Arial, sans-serif; }
.num span { font-size: 0.75rem; color: var(--soft); text-transform: uppercase; letter-spacing: 0.06em; }
.vline { grid-column: 1 / -1; margin: 2px 0 0; }
.vtag { display: inline-block; padding: 2px 8px; border-radius: 2px; font-weight: 700; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; margin-right: 4px; }
.v-build-it { background: var(--green-bg); color: var(--green); }
.v-more-clips, .v-more-fabric { background: var(--amber-bg); color: var(--amber); }
.v-rethink-frame { background: var(--red-bg); color: var(--red); }
.checks { list-style: none; padding: 0; margin: 12px 0 0; font-size: 0.88rem; }
.checks li { padding: 5px 8px; border-left: 3px solid var(--green); margin: 0 0 4px; background: var(--green-bg); overflow-wrap: anywhere; }
.checks li.short { border-left-color: var(--red); background: var(--red-bg); }
.partslist { list-style: none; padding: 0; margin: 12px 0 0; }
.prow { display: flex; align-items: center; gap: 8px; padding: 6px 0; border-bottom: 1px dotted var(--line); font-size: 0.9rem; }
.prow.none { border: 0; }
.pn { flex: none; width: 22px; height: 22px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--soft); font-size: 0.75rem; }
.pt { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.use { flex: none; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; padding: 2px 6px; border: 1px solid var(--line); border-radius: 2px; max-width: 42%; text-align: right; }
.u-frame { border-color: var(--ink); }
.u-roof, .u-walls { color: var(--blue); border-color: var(--blue); }
.u-holders { color: var(--amber); border-color: var(--amber); }
.u-inside { color: var(--green); border-color: var(--green); }
.u-leave { color: var(--red); border-color: var(--red); }
.u-spare { color: var(--soft); }

.progress { margin: 12px 0 0; padding: 10px 12px; border: 1px dashed var(--soft); }
.stages { list-style: none; padding: 0; margin: 6px 0; font-size: 0.88rem; }
.stage { color: var(--soft); }
.stage.done { color: var(--green); }
.stage.active { color: var(--ink); font-weight: 600; }
.stage-ic { display: inline-block; width: 14px; font-family: monospace; }
.raw { white-space: pre-wrap; overflow-wrap: anywhere; font-size: 0.8rem; background: var(--bg); padding: 8px; max-height: 300px; overflow: auto; }
.result { margin: 14px 0 0; border-top: 1.5px solid var(--ink); padding-top: 10px; }
.result.empty .rhead { opacity: 0.8; }
.rhead { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }
.badge { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; padding: 3px 8px; border: 1.5px solid var(--soft); color: var(--soft); border-radius: 2px; }
.badge.on { border-color: currentColor; }
.headline { font-size: 1.12rem; font-weight: 600; margin: 10px 0; }
.result h3 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; margin: 14px 0 6px; color: var(--soft); }
.bnotes { list-style: none; padding: 0; margin: 0; }
.bnote { display: flex; gap: 8px; align-items: baseline; padding: 6px 0; border-bottom: 1px dotted var(--line); }
.bnote .part { flex: none; width: 64px; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--blue); }
.bnote .say { margin: 0; flex: 1; min-width: 0; }
.rnotes { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 12px 0 0; }
.rnote { border: 1px solid var(--line); padding: 8px 10px; position: relative; }
.rnote.wide { grid-column: 1 / -1; }
.rnote .rt { margin: 0 0 4px; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--soft); }
.rnote p { margin: 0; }
.rnote .copy1 { margin-top: 6px; }
.recon { list-style: none; padding: 0; margin: 0; font-size: 0.88rem; }
.recon li { padding: 4px 8px; margin: 0 0 3px; border-left: 3px solid var(--green); }
.recon li.warn { border-left-color: var(--amber); background: var(--amber-bg); }
.recon li.bad { border-left-color: var(--red); background: var(--red-bg); }

.saved { list-style: none; padding: 0; margin: 10px 0 0; }
.hrow { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 8px 0; border-bottom: 1px dotted var(--line); }
.hrow.none { color: var(--soft); font-size: 0.9rem; }
.hinfo { min-width: 0; display: flex; flex-direction: column; overflow-wrap: anywhere; }
.hbtns { display: flex; gap: 4px; flex: none; }
.about p { max-width: 900px; }
.foot { max-width: 1180px; margin: 0 auto; padding: 0 16px 40px; font-size: 0.86rem; color: var(--soft); }

.toasts { position: fixed; left: 50%; bottom: 16px; transform: translateX(-50%); z-index: 20; display: flex; flex-direction: column; gap: 6px; width: min(92vw, 520px); }
.toast { padding: 9px 12px; background: var(--solid); color: var(--solid-ink); border-radius: 2px; font-size: 0.9rem; transition: opacity 0.5s; }
.toast.err { background: var(--red); color: #fff; }
.toast a { color: inherit; }
.toast.gone { opacity: 0; }

@media (max-width: 860px) {
  .bench { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 560px) {
  .top { gap: 8px; padding: 8px 12px; }
  .back-t { display: none; }
  .brand { font-size: 0.92rem; }
  .grid2 { grid-template-columns: minmax(0, 1fr); }
  .numbers { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rnotes { grid-template-columns: minmax(0, 1fr); }
  .sheet { min-width: 640px; }
  .card { padding: 12px; }
}
@media print {
  @page { size: A3 landscape; margin: 0; }
  body { background: #fff; }
  .top, .hero, .bench, .runcard, .card:not(.sheet-card), .foot, .toasts, .legend, .sheet-card .actions { display: none !important; }
  main { padding: 0; max-width: none; }
  .sheet-card { border: 0; box-shadow: none; padding: 0; margin: 0; }
  .sheet-scroll { border: 0; overflow: visible; }
  .sheet { min-width: 0; }
}
/* Aliases the docs pages (api.html, tokens.html) read. */
:root { --accent: var(--blue); --accent-ink: #ffffff; --field: var(--bg); --muted: var(--soft); }
:root[data-theme="dark"] { --accent-ink: #0b1d2e; }