/* =========================================================================
   Instrument page — brief §7.2 / v6 §07 template table
   The spine: capsule → what it measures → scales → administration →
   sample items → purchase → citation → FAQ. Identical on all seven.
   ========================================================================= */

/* ---- Skip link ------------------------------------------------------- */
.skip {
  position: absolute; left: var(--sp-s); top: -100px; z-index: 100;
  background: var(--action); color: var(--paper);
  padding: var(--sp-2xs) var(--sp-s); border-radius: var(--radius-s);
}
.skip:focus { top: var(--sp-s); color: var(--paper); }

/* ---- Masthead -------------------------------------------------------- */
.masthead {
  border-block-end: 1px solid var(--rule);
  padding-block: var(--sp-2xs);
  background: var(--paper);
}
.masthead__in { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-s); }
.wordmark {
  font-family: var(--font-display); font-size: var(--step-1);
  color: var(--ink); text-decoration: none; letter-spacing: .01em;
}
.wordmark:hover { color: var(--ink); }

/* The hamburger is a real control at 44px. The drawer it opens is
   progressive enhancement over the footer nav — nav spec §7.            */
.hamburger {
  background: var(--paper-3); border: 1px solid var(--rule);
  border-radius: var(--radius-s); color: var(--ink);
  justify-content: center;
}
@media (min-width: 64rem) { .hamburger { display: none; } }

/* Desktop inline nav — hidden on phones, where the drawer serves.       */
.nav { display: none; }
@media (min-width: 64rem) {
  .nav { display: flex; align-items: center; }
  /* :not(.btn) matters — a bare `.nav a` rule is specificity 0,2,0 and
     silently beats `.btn--primary` at 0,1,0, which paints the button's
     label in the nav link colour. Measured at 1.11:1 before this. */
  .nav a:not(.btn) {
    text-decoration: none; color: var(--ink-soft);
    font-size: var(--step--1); padding-inline: var(--sp-2xs);
  }
  .nav a:not(.btn):hover { color: var(--action); }
  .nav a[data-store] { color: var(--gold-text); font-weight: 600; }
}

/* ---- Breadcrumb ------------------------------------------------------ */
.crumbs { padding-block: var(--sp-s); font-size: var(--step--1); color: var(--text-3); }
.crumbs ol { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: var(--sp-3xs) var(--sp-2xs); }
.crumbs li::after { content: "›"; margin-inline-start: var(--sp-2xs); color: var(--rule); }
.crumbs li:last-child::after { content: none; }
.crumbs a { color: var(--text-3); }

/* ---- Page head + answer capsule -------------------------------------
   v6 §11: the capsule is the quotable unit. It sits directly under the
   single H1 as literal text — no accordion, no tab, no JS.             */
.page-head { padding-block-end: var(--sp-m); }
.eyebrow {
  font-size: var(--step--1); letter-spacing: .12em; text-transform: uppercase;
  color: var(--gold-text); font-weight: 600;
}
.capsule {
  margin-block-start: var(--sp-s);
  padding: var(--sp-s) var(--sp-m);
  border-inline-start: 3px solid var(--gold);
  background: var(--paper-3);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: var(--step-1);
  line-height: 1.5;
  max-width: var(--measure);
}

/* ---- Section rhythm -------------------------------------------------- */
.section { padding-block: var(--sp-l); border-block-start: 1px solid var(--rule-soft); }
.section:first-of-type { border-block-start: 0; }
.section__lead { color: var(--text-2); max-width: var(--measure); }

/* ---- Scales & coefficients ------------------------------------------
   Brief §4.3: tabular data on a small screen gets a definition-list or
   stacked-row treatment, NOT a squeezed grid. Below 48rem each scale is
   a self-contained block; above it, a two-column definition layout.
   Selectable text throughout — never an image of a table.             */
.scales { list-style: none; padding: 0; display: grid; gap: var(--sp-xs); }
.scale {
  background: var(--surface);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
  padding: var(--sp-s) var(--sp-m);
}
.scale__name { font-family: var(--font-display); font-size: var(--step-1); }
.scale__def  { color: var(--text-2); margin-block-start: var(--sp-3xs); }
.scale__meta {
  margin-block-start: var(--sp-2xs);
  display: flex; flex-wrap: wrap; gap: var(--sp-2xs) var(--sp-m);
  font-size: var(--step-sm); color: var(--text-3);
}
.scale__meta b { color: var(--text); font-variant-numeric: tabular-nums; }
/* The sample item is a quotation from the instrument itself, so it is set as
   one: quoted, italic, and ruled off from the definition above it. It is the
   line a research office reads most closely, so it must never look like our
   own prose. */
.scale__sample {
  margin-block-start: var(--sp-2xs);
  padding-inline-start: var(--sp-s);
  border-inline-start: 2px solid var(--rule-soft);
  color: var(--text-2); font-style: italic;
}
.scale__samplelab {
  display: block; font-style: normal;
  font-family: var(--font-ui); font-size: var(--step-xs);
  letter-spacing: .08em; text-transform: uppercase; color: var(--text-3);
}
/* Pathways read as a continuation of the scales, one step quieter. */
.scales--paths .scale { background: transparent; }
@media (min-width: 48rem) {
  .scale { display: grid; grid-template-columns: 14rem 1fr; gap: var(--sp-s) var(--sp-m); align-items: baseline; }
  .scale__meta, .scale__sample { grid-column: 2; }
}

/* ---- Pending block — brief §10, never invent a number ---------------- */
.pending {
  border: 1px dashed var(--gold);
  background: color-mix(in srgb, var(--gold) 7%, transparent);
  border-radius: var(--radius);
  padding: var(--sp-s) var(--sp-m);
  color: var(--text-2);
  font-size: var(--step-sm);
}
.pending b { color: var(--gold-text); text-transform: uppercase; letter-spacing: .08em; font-size: var(--step--1); }

/* ---- Administration -------------------------------------------------- */
.spec { display: grid; gap: 0; margin: 0; }
.spec > div {
  display: grid; gap: var(--sp-3xs);
  padding-block: var(--sp-s);
  border-block-end: 1px solid var(--rule-soft);
}
.spec > div:last-child { border-block-end: 0; }
.spec dt { font-weight: 600; font-size: var(--step--1); letter-spacing: .04em; text-transform: uppercase; color: var(--text-3); }
.spec dd { margin: 0; max-width: var(--measure); }
@media (min-width: 48rem) {
  .spec > div { grid-template-columns: 15rem 1fr; gap: var(--sp-m); align-items: baseline; }
}

/* ---- Sample items ---------------------------------------------------- */
.samples { list-style: none; padding: 0; display: grid; gap: var(--sp-2xs); }
.samples li {
  background: var(--paper-3); border-radius: var(--radius-s);
  padding: var(--sp-xs) var(--sp-s);
  font-style: italic; color: var(--text);
  max-width: var(--measure);
}

/* ---- Purchase panel --------------------------------------------------
   v6 §07: "a visible purchase path", and the brief requires it in a
   FIXED POSITION on every instrument page. It sits here, after
   administration, on all seven — never floated to a different slot.
   Container-queried so the same component is correct inline on a phone
   and in the sidebar at desktop without a second ruleset.              */
.buy { background: var(--surface); border: 1px solid var(--rule); border-radius: var(--radius); padding: var(--sp-m); }
.buy__price {
  font-family: var(--font-display);
  font-size: var(--step-3);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.buy__unit { font-size: var(--step--1); color: var(--text-3); font-family: var(--font-ui); }
.buy__note { font-size: var(--step-sm); color: var(--text-2); margin-block-start: var(--sp-2xs); }
.buy__actions { display: grid; gap: var(--tap-gap); margin-block-start: var(--sp-s); }
@container (min-width: 30rem) {
  .buy__actions { grid-template-columns: 1fr 1fr; }
}

/* ---- FAQ -------------------------------------------------------------
   <details> is deliberate. Brief §4.3: the answers must be present in
   the DOM whether or not the accordion is open. <details> collapses
   without removing — an accordion that injects on click is invisible to
   exactly the crawlers this project exists to satisfy. It also needs no
   JavaScript, which is the no-JS requirement met for free.            */
.faq { display: grid; gap: var(--sp-2xs); }
.faq details {
  background: var(--surface);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
}
.faq summary {
  padding: var(--sp-xs) var(--sp-s);
  font-family: var(--font-display);
  font-size: var(--step-1);
  cursor: pointer;
  list-style: none;
  justify-content: space-between;
  gap: var(--sp-s);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; font-family: var(--font-ui); font-size: var(--step-2);
  color: var(--gold-text); line-height: 1; flex: 0 0 auto;
}
.faq details[open] summary::after { content: "–"; }
.faq__a { padding: 0 var(--sp-s) var(--sp-s); color: var(--text-2); max-width: var(--measure); }

/* ---- Citation -------------------------------------------------------- */
.cite {
  background: var(--paper-3); border-radius: var(--radius);
  padding: var(--sp-s) var(--sp-m); font-size: var(--step-sm);
}
.cite p { max-width: var(--measure); }
.cite__ref { font-family: var(--font-display); color: var(--text); }

/* ---- Footer — restates the full navigation as plain links on every
   page. Nav spec §7: this is the crawler path and the no-JS path.     */
/* Dark green foot, site-wide. --green-deep #244334 is the darkest green with
   a name in the palette; --ink #1C3327 is darker still but it is the text
   colour and reads as near-black rather than as green.
   ⚠️ Everything inside had been written for a PAPER ground — link, heading,
   colophon and both rules were all dark-on-light. Each is re-specified below.
   Miss one and it goes invisible rather than merely looking wrong. */
.site-footer {
  margin-block-start: var(--sp-2xl);
  border-block-start: 1px solid var(--rule);
  background: var(--green-deep);
  color: var(--paper);
  padding-block: var(--sp-l);
}
.site-footer nav ul { list-style: none; padding: 0; display: grid; gap: var(--sp-3xs); }
/* Paper at 88% rather than flat white: full --paper on this green is a very
   loud 11:1 for a list of secondary links, and the hover then has nowhere
   brighter to go. */
.site-footer a { color: rgba(245,240,228,.88); text-decoration: none; transition: color .15s ease; }
.site-footer a:hover, .site-footer a:focus-visible { color: var(--paper); }
.site-footer h2 {
  font-size: var(--step--1); text-transform: uppercase; letter-spacing: .1em;
  /* The gold from the nav's Store link and the card eyebrows. --gold-text is
     the paper-ground variant and is far too dark to use here. */
  color: #F0DCA8; font-family: var(--font-ui); font-weight: 600;
  margin-block-end: var(--sp-2xs);
}
.footer-grid { display: grid; gap: var(--sp-m); }
@media (min-width: 48rem) { .footer-grid { grid-template-columns: repeat(4, 1fr); } }
/* --rule-soft is 10% BLACK: on the dark green it disappears entirely. */
.colophon { margin-block-start: var(--sp-m); padding-block-start: var(--sp-s);
  border-block-start: 1px solid rgba(245,240,228,.18); font-size: var(--step--1);
  color: rgba(245,240,228,.68); }

/* ---- Desktop two-column ---------------------------------------------
   Brief §3: the first point at which two columns can be justified is
   768px. Below that this is one column, in spine order.                */
@media (min-width: 64rem) {
  .layout { display: grid; grid-template-columns: minmax(0, 1fr) 22rem; gap: var(--sp-xl); align-items: start; }
  .layout__aside { position: sticky; top: var(--sp-s); }
}