/* The walkthrough page. Shares the viewer's typefaces and its paper-and-ink
   palette, and adds a dark theme: this page is read, not browsed, and a reader
   who has their system set dark should not be handed a lightbox.

   The rendered plates are printed on paper in both themes on purpose. A scan
   has a paper colour, and inverting it would misrepresent the thing the page
   exists to show; the plate sits on a card instead, the way a print does. */
:root {
  --paper: #f4eddd;
  --card: #fbf6ea;
  --edge: #e0d3b8;
  --ink: #221b12;
  --ink-soft: #5c5142;
  --carmine: #b0403a;
  --carmine-dark: #8d2f2b;
  --keep: #0c6949;
  --prov: #6d4a9e;
  --drop: #7f7464;
  --hairline: rgba(34, 27, 18, .18);
  --shadow: 0 18px 40px -22px rgba(0, 0, 0, .5);
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #16130e;
    --card: #201b14;
    --edge: #3a3227;
    --ink: #f0e7d6;
    --ink-soft: #b3a794;
    --carmine: #e0847c;
    --carmine-dark: #f0a89f;
    --keep: #5fbf9b;
    --prov: #b295e0;
    --drop: #9c9284;
    --hairline: rgba(240, 231, 214, .16);
    --shadow: 0 18px 40px -22px rgba(0, 0, 0, .9);
  }
}
/* The system preference is the only theme signal. This page has no toggle, so
   there is deliberately no `data-theme` override here: an override nothing
   sets is unreachable CSS that reads as a feature. */

* { box-sizing: border-box; margin: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Newsreader", Georgia, serif;
  font-size: 17px;
  line-height: 1.55;
  padding: 0 20px 40px;
}
a { color: var(--carmine-dark); }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--carmine); outline-offset: 3px;
}
.skip {
  position: absolute; left: -9999px;
  background: var(--card); padding: 10px 14px; border: 1px solid var(--edge);
}
.skip:focus { left: 12px; top: 12px; z-index: 10; }

#masthead {
  max-width: 1360px; margin: 0 auto; padding: 40px 0 22px;
  border-bottom: 1px solid var(--hairline);
}
.kicker {
  font-size: 11.5px; letter-spacing: .24em; text-transform: uppercase;
  color: var(--carmine-dark); font-weight: 500;
}
h1 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 900; font-size: clamp(30px, 5vw, 52px); line-height: 1.03;
  letter-spacing: -.015em; margin-top: 8px;
}
.dek { margin-top: 10px; color: var(--ink-soft); max-width: 62ch; }

/* ---------- the step rail ---------- */
#progress { max-width: 1360px; margin: 0 auto; overflow-x: auto; scrollbar-width: thin; }
#steps {
  display: flex; gap: 4px; list-style: none; padding: 14px 0 12px; margin: 0;
}
#steps li { flex: 0 0 auto; }
#steps button {
  min-width: 34px; min-height: 34px; padding: 0 6px; cursor: pointer;
  font: 600 12px/1 "Fraunces", Georgia, serif;
  background: transparent; color: var(--ink-soft);
  border: 1px solid var(--hairline); border-radius: 999px;
}
#steps button:hover { border-color: var(--carmine); color: var(--ink); }
#steps button[aria-current="step"] {
  background: var(--carmine); border-color: var(--carmine); color: #fdf6ea;
}
#steps .act-break { width: 12px; }

/* ---------- the panel ---------- */
#panel {
  max-width: 1360px; margin: 0 auto; padding: 10px 0 0;
  display: grid; gap: 30px; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  align-items: start;
}
#panel:focus { outline: none; }
#figure { margin: 0; }
#plate-link { display: block; }
#plate {
  display: block; width: 100%; height: auto;
  border: 1px solid var(--edge); box-shadow: var(--shadow);
  background: #f5eedf;
}
#plate-note { margin-top: 8px; font-size: 13px; color: var(--ink-soft); }

#states { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
#states button {
  min-height: 40px; padding: 0 16px; cursor: pointer;
  font: 600 13.5px/1 "Fraunces", Georgia, serif;
  background: transparent; color: var(--ink); border: 1px solid var(--hairline);
}
#states button:hover { border-color: var(--carmine); }
#states button[aria-pressed="true"] {
  background: var(--carmine); border-color: var(--carmine); color: #fdf6ea;
}
#states:empty { display: none; }

.act {
  font-size: 11.5px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--carmine-dark);
}
h2 {
  font-family: "Fraunces", Georgia, serif; font-weight: 900;
  font-size: clamp(24px, 2.6vw, 34px); line-height: 1.08; margin: 8px 0 0;
}
.lede { margin-top: 10px; font-size: 18.5px; color: var(--ink); }
.body { margin-top: 14px; color: var(--ink-soft); }
/* The walkthrough tells one or two steps out of the order a run does them in.
   Where that happens the panel says so, in its own block, rather than leaving
   a reader to infer a sequence the pipeline does not follow. */
.order-note {
  margin-top: 14px; padding: 10px 14px;
  border-left: 3px solid var(--carmine);
  background: var(--card);
  font-size: 15px; color: var(--ink);
}

#figures {
  margin-top: 20px; padding-top: 14px; border-top: 1px solid var(--hairline);
  display: grid; grid-template-columns: 1fr auto; gap: 4px 16px;
}
#figures dt { font-size: 14px; color: var(--ink-soft); }
#figures dd {
  margin: 0; text-align: right;
  font-family: "Fraunces", Georgia, serif; font-weight: 600; font-size: 15px;
  font-variant-numeric: tabular-nums;
}

/* ---------- the running tally ---------- */
#tally { margin-top: 22px; padding: 14px 16px; background: var(--card); border: 1px solid var(--edge); }
.tally-head {
  font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-soft);
}
#tally-bar { display: flex; height: 16px; margin: 10px 0 8px; background: var(--hairline); }
.seg { display: block; height: 100%; }
.seg.placed { background: var(--keep); }
.seg.prov { background: var(--prov); }
.seg.flagged { background: var(--drop); }
#tally-note { font-size: 13.5px; color: var(--ink-soft); }
#tally.idle #tally-bar { opacity: .35; }

/* ---------- controls ---------- */
#controls {
  position: sticky; bottom: 0; z-index: 5;
  max-width: 1360px; margin: 26px auto 0; padding: 12px 0;
  display: flex; align-items: center; gap: 14px;
  background: var(--paper); border-top: 1px solid var(--hairline);
}
#controls button {
  min-height: 46px; padding: 0 20px; cursor: pointer;
  font: 600 14px/1 "Fraunces", Georgia, serif;
  background: transparent; color: var(--ink); border: 1px solid var(--hairline);
}
#controls button:hover:not(:disabled) { border-color: var(--carmine); }
#controls button:disabled { opacity: .35; cursor: default; }
#counter { font-size: 13px; color: var(--ink-soft); letter-spacing: .1em; }
#next { margin-left: auto; }

/* ---------- footer ---------- */
#footer {
  max-width: 1360px; margin: 40px auto 0; padding-top: 20px;
  border-top: 1px solid var(--hairline); font-size: 14px; color: var(--ink-soft);
}
#glossary { display: grid; gap: 6px 18px; grid-template-columns: max-content 1fr; }
#glossary .term { font-weight: 600; color: var(--ink); }
#credits, #outro { margin-top: 16px; }
/* the outro's two ways on sit apart from the sentence and from each other,
   and are a row rather than a line of text so a thumb can hit either */
#outro a { display: inline-flex; align-items: center; min-height: 44px; }
#outro a + a { margin-left: 20px; }

/* ---------- one column, on a phone ---------- */
@media (max-width: 900px) {
  body { padding: 0 14px 30px; }
  #panel { grid-template-columns: 1fr; gap: 20px; }
  #masthead { padding: 26px 0 16px; }
  #figures { grid-template-columns: 1fr auto; }
  #controls { gap: 10px; }
  #controls button { padding: 0 14px; }
  #glossary { grid-template-columns: 1fr; }
  #glossary .term { margin-top: 8px; }
}