/* Stark Docs — document-only rules (design/docs-2026-10/BUILD.md §4).
   Imported LAST, after fonts → tokens → components → {app}-finish.
   Tokens only: no colour literals in this file. */

html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--room, var(--bg));
  background-image: var(--room-wash, none);
  background-attachment: fixed;
  color: var(--t-mid);
  font-family: var(--f-body);
  font-size: .95rem; line-height: 1.6; font-weight: 400;
  -webkit-font-smoothing: antialiased;
}
.doc-gutter { padding-inline: 48px; }
.doc-col { max-width: none; }   /* full width on screen (Brian, 22 Oct) — overrides the §4 72ch measure */

/* ── Running header ─────────────────────────────────────────────────────── */
.doc-head {
  position: sticky; top: 0; z-index: 5;
  background: var(--room, var(--bg));
  border-bottom: 1px solid var(--border);
}
.doc-head-in {
  display: flex; align-items: center; gap: 14px;
  padding-block: 10px;
}
.doc-head .reactor { flex: none; }
.doc-head-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.doc-kicker {
  font-family: var(--f-mono); font-size: .62rem; font-weight: 500;
  letter-spacing: .22em; text-transform: uppercase; color: var(--seclab);
}
.doc-head-title {
  font-family: var(--f-display, var(--f-disp)); font-weight: 600;
  font-size: .95rem; letter-spacing: .14em; color: var(--t-hi);
}
.doc-head-meta {
  margin-left: auto; text-align: right;
  font-family: var(--f-mono); font-size: .62rem; letter-spacing: .18em;
  text-transform: uppercase; color: var(--t-lo);
}

/* ── Cover ──────────────────────────────────────────────────────────────── */
.cover { padding-block: 56px 40px; text-align: center; }
.cover .reactor {
  filter: drop-shadow(0 0 18px color-mix(in srgb, var(--light) 85%, transparent))
          drop-shadow(0 0 40px color-mix(in srgb, var(--light) 35%, transparent));
}
.cover-lineage {
  margin-top: 14px;
  font-family: var(--f-mono); font-size: .62rem; letter-spacing: .3em;
  text-transform: uppercase; color: var(--t-lo);
}
.cover .doc-kicker { display: block; margin-top: 26px; }
.cover-title {
  margin: 8px 0 0;
  font-family: var(--f-display, var(--f-disp)); font-weight: 600;
  font-size: 2.5rem; line-height: 1.15; letter-spacing: .26em;
  padding-left: .26em;                    /* optical centring against trailing tracking */
  background: var(--wordmark);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.cover-sub {
  margin-top: 10px;
  font-family: var(--f-mono); font-size: .62rem; font-weight: 500;
  letter-spacing: .38em; text-transform: uppercase; color: var(--gold-text);
}
.cover-voice {
  display: inline-block; max-width: 44ch; margin: 28px 0 0; text-align: left;
  padding-left: 14px; border-left: 2px solid var(--arc);
  font-family: var(--f-body); font-weight: 500; font-style: normal;
  font-size: .95rem; color: var(--t-mid);
}
.cover-asof {
  margin-top: 22px;
  font-family: var(--f-mono); font-size: .62rem; letter-spacing: .18em;
  text-transform: uppercase; color: var(--t-lo);
}
.cover .mk-hero-rule { max-width: 360px; margin: 30px auto 0; }

/* ── Contents ───────────────────────────────────────────────────────────── */
.intro .mk-card { margin: 0 0 28px; text-align: center; }
.contents { padding-block: 8px 24px; }
.toc { list-style: none; margin: 14px 0 0; padding: 0; }
.toc li { margin: 0; }
.toc a {
  display: flex; align-items: baseline; gap: 12px; padding: 5px 0;
  color: var(--t-mid); text-decoration: none;
}
.toc a:hover { color: var(--t-hi); }
.toc .n { font-family: var(--f-mono); font-weight: 500; font-size: .8rem; color: var(--gold-text); flex: none; }
.toc .t { font-family: var(--f-body); }
.toc .lead { display: none; flex: 1; border-bottom: 1px dotted var(--border); transform: translateY(-3px); }
.toc .pg { display: none; font-family: var(--f-mono); font-size: .8rem; color: var(--t-lo); }

/* ── Body ───────────────────────────────────────────────────────────────── */
.doc-body { padding-bottom: 40px; }
.doc-body h2 {
  display: flex; align-items: baseline; gap: 12px;
  margin: 48px 0 0; padding-bottom: 12px; position: relative;
  font-family: var(--f-display, var(--f-disp)); font-weight: 600;
  font-size: 1.3rem; line-height: 1.3; letter-spacing: .04em; color: var(--t-hi);
  scroll-margin-top: 84px;
}
.doc-body h2::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 28px; height: 2px; border-radius: 2px; background: var(--flick);
}
.doc-body h2 .num {
  flex: none; font-family: var(--f-mono); font-weight: 500; font-size: .8rem;
  letter-spacing: .12em; color: var(--gold-text);
}
.doc-body h3 {
  margin: 28px 0 0; font-family: var(--f-body); font-weight: 600;
  font-size: 1rem; color: var(--t-hi);
}
.doc-body p { margin: 14px 0 0; }
.doc-body strong, .doc-body b { font-weight: 600; color: var(--t-hi); }
.doc-body em, .doc-body i { font-style: normal; font-weight: 500; }
.doc-body a { color: var(--gold-text); text-decoration: underline; text-decoration-color: var(--border); text-underline-offset: 3px; }
.doc-body a:hover { color: var(--gold); }
.doc-body ul, .doc-body ol { margin: 12px 0 0; padding-left: 1.3em; }
.doc-body li { margin: 6px 0 0; padding-left: .2em; }
.doc-body li::marker { color: var(--gold-text); }
.doc-body code, .doc-body kbd {
  font-family: var(--f-mono); font-size: .85em; color: var(--t-hi);
  background: var(--track); border-radius: var(--r-chip); padding: .1em .4em;
}
.doc-body pre.mk-card { margin: 16px 0 0; padding: 14px 16px; overflow-x: auto; }
.doc-body pre code { background: none; padding: 0; font-size: 13px; line-height: 1.6; color: var(--t-hi); }

/* cards + callouts */
.doc-body .mk-card { margin: 18px 0 0; }
.doc-body .mk-card > :first-child { margin-top: 0; }
.doc-body .mk-card > :last-child { margin-bottom: 0; }
.callout { border-left: 3px solid var(--gold); }
.callout.caution { border-left-color: var(--watch); }
.callout.alert { border-left-color: var(--red); }
.callout-title {
  margin: 0 0 6px !important;
  font-family: var(--f-mono); font-size: .66rem; font-weight: 500;
  letter-spacing: .2em; text-transform: uppercase; color: var(--gold-text);
}
.callout.caution .callout-title { color: var(--watch); }
.callout.alert .callout-title { color: var(--red); }

/* tables */
.doc-body .tbl-wrap { margin-top: 18px; overflow-x: auto; }
.doc-body table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.doc-body th {
  text-align: left; padding: 10px 16px;
  font-family: var(--f-mono); font-size: .68rem; font-weight: 500;
  letter-spacing: .2em; text-transform: uppercase; color: var(--t-lo);
  border-bottom: 1px solid var(--border);
}
.doc-body td { padding: 10px 16px; border-bottom: 1px solid var(--border); font-family: var(--f-num); }
.doc-body tr:last-child td { border-bottom: 0; }

/* figures */
.doc-body figure.mk-card { padding: 8px; }
.doc-body figure img { display: block; max-width: 100%; height: auto; border-radius: var(--r-item); }
.doc-body figcaption { margin-top: 8px; font-family: var(--f-mono); font-size: .62rem; letter-spacing: .08em; color: var(--t-lo); }

/* ── Footer ─────────────────────────────────────────────────────────────── */
.doc-foot { padding-block: 0 40px; }
.doc-foot .mk-hero-rule { margin-bottom: 14px; }
.doc-foot-line {
  border-top: 1px solid var(--border); padding-top: 14px;
  font-family: var(--f-mono); font-size: .6rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--t-lo);
}

/* ── Mobile ─────────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .doc-gutter { padding-inline: 16px; }
  .doc-head-meta { display: none; }
  .cover { padding-block: 36px 24px; }
  .cover-title { font-size: 1.75rem; letter-spacing: .2em; }
  .doc-body h2 { font-size: 1.15rem; flex-wrap: wrap; gap: 4px 12px; }
  .doc-body .mk-card { padding: 12px 14px; }
}

/* ── Library page (site/index.html) ─────────────────────────────────────── */
.lib { padding-block: 44px 24px; }
.lib-head { display: flex; flex-direction: column; align-items: center; gap: 14px; text-align: center; padding-bottom: 26px; border-bottom: 1px solid var(--border); }
.lib-head h1 {
  margin: 4px 0 0; font-family: var(--f-display, var(--f-disp)); font-weight: 600;
  font-size: 1.6rem; letter-spacing: .12em; padding-left: .12em; color: var(--t-hi);
}
.lib-grid {
  display: grid; gap: 16px; margin-top: 28px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.lib-tile { display: flex; gap: 14px; align-items: flex-start; padding: 16px; color: inherit; text-decoration: none; }
.lib-tile .reactor { flex: none; width: 48px !important; height: 48px !important; }
.lib-tile h2 {
  margin: 0; font-family: var(--f-display, var(--f-disp)); font-weight: 600;
  font-size: .95rem; letter-spacing: .06em; color: var(--t-hi);
}
.lib-tile p { margin: 6px 0 0; font-size: .85rem; line-height: 1.5; color: var(--t-mid); }
.lib-tile .asof {
  display: block; margin-top: 8px; font-family: var(--f-mono); font-size: .6rem;
  letter-spacing: .16em; text-transform: uppercase; color: var(--t-lo);
}