/* ============================================================
   Controlling LLM Prose — shared stylesheet
   Tufte-inspired: warm ground, serif measure, high data-ink.
   Pure vanilla CSS, no dependencies.
   ============================================================ */

:root {
  --bg: #fffff8;
  --ink: #111111;
  --ink-soft: #333333;
  --rule: #d8d4c8;
  --rule-soft: #e8e4d8;
  --accent: #7b1113;       /* deep burgundy — unread links */
  --accent-visited: #5a3d7a; /* muted plum — visited/read links */
  --accent-navy: #1b3a5b;
  --margin-ink: #5a5548;
  --code-bg: #f4f1e8;
  --success: #2c5f2d;
  --card-bg: #fffffb;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: Palatino, "Palatino Linotype", "Book Antiqua", Georgia, serif;
  font-size: 19px;
  line-height: 1.5;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---------- Links: underlined, colored, with read/unread state ----------
   Default: all links are underlined and burgundy (unread), plum once visited
   (read). Structural links (brand, nav, cards, buttons, pager, breadcrumb,
   surprise) opt OUT of underline + visited coloring via .no-ulink further
   down, because they are UI chrome rather than prose references. */
a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.12em;
  text-decoration-color: rgba(123, 17, 19, 0.4);
}
a:visited { color: var(--accent-visited); text-decoration-color: rgba(90, 61, 122, 0.4); }
a:hover {
  text-decoration-thickness: 2px;
  text-decoration-color: currentColor;
}
a:focus-visible { outline: 2px solid var(--accent-navy); outline-offset: 2px; }

/* Structural / chrome links: no underline, no visited recoloring */
.no-ulink,
.brand,
.mode-nav a,
.mode-card,
.map-card-head,
.track-card,
.concept-index a.ci-title,
.pager a,
.breadcrumb a,
.breadcrumb .surprise,
.skip-link {
  text-decoration: none;
}
.brand:visited,
.mode-nav a:visited,
.mode-card:visited,
.map-card-head:visited,
.track-card:visited,
.concept-index a.ci-title:visited,
.pager a:visited,
.breadcrumb a:visited,
.skip-link:visited {
  color: inherit;
}
/* keep hover underline for chrome links that expect it */
.brand:hover,
.mode-nav a:hover,
.map-card-head:hover,
.track-card:hover,
.concept-index a.ci-title:hover,
.pager a:hover { text-decoration: none; }

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.5rem 2rem 6rem;
}
.wrap.narrow { max-width: 46rem; }

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: var(--bg);
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------- Site header / breadcrumb ---------- */
.site-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.site-head .brand {
  font-style: italic;
  font-size: 1.05rem;
  color: var(--ink);
  white-space: nowrap;
}
.site-head .brand:hover { text-decoration: none; color: var(--accent); }
.breadcrumb {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--margin-ink);
}
.breadcrumb a { color: var(--margin-ink); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { margin: 0 0.5rem; color: var(--rule); }
.breadcrumb .surprise {
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 0.15rem 0.55rem;
  margin-left: 0.75rem;
  letter-spacing: 0.08em;
}
.breadcrumb .surprise:hover { background: var(--accent); color: var(--bg); text-decoration: none; }

/* ---------- Home hero ---------- */
.hero { max-width: 40rem; margin: 1rem 0 3rem; }
.hero h1 {
  font-size: 2.9rem;
  line-height: 1.03;
  font-weight: 400;
  font-style: italic;
  margin: 0 0 0.4rem;
  letter-spacing: -0.01em;
}
.hero .subtitle {
  font-size: 1.25rem;
  color: var(--ink-soft);
  font-style: italic;
  margin: 0 0 1.2rem;
}
.hero p.lede { font-size: 1.05rem; color: var(--ink-soft); max-width: 36rem; }

/* ---------- Page titles ---------- */
h1.page-title {
  font-size: 2.4rem;
  font-weight: 400;
  font-style: italic;
  margin: 0.5rem 0 0.3rem;
  line-height: 1.08;
}
.eyebrow {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
  font-weight: 700;
  margin: 0 0 0.3rem;
}
.lead {
  font-size: 1.12rem;
  color: var(--ink-soft);
  font-style: italic;
  max-width: 36rem;
  margin: 0.6rem 0 2rem;
}

hr.rule { border: none; border-top: 1px solid var(--rule); margin: 2.5rem 0; }
hr.rule.thin { border-top: 1px solid var(--rule-soft); margin: 1.5rem 0; }

/* ---------- Home: area map ---------- */
.map-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.4rem;
  margin: 2rem 0;
}
.map-card {
  display: block;
  border: 1px solid var(--rule);
  border-top: 3px solid var(--accent);
  background: var(--card-bg);
  padding: 1.3rem 1.4rem 1.5rem;
  border-radius: 2px;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
  color: var(--ink);
}
.map-card:hover {
  text-decoration: none;
  box-shadow: 0 6px 20px rgba(17,17,17,0.08);
  transform: translateY(-2px);
}
.map-card .numeral {
  font-size: 0.85rem;
  font-style: italic;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.map-card h2 {
  font-size: 1.3rem;
  font-weight: 400;
  margin: 0.2rem 0 0.5rem;
  line-height: 1.15;
}
.map-card p { font-size: 0.92rem; color: var(--ink-soft); margin: 0 0 0.9rem; }
.map-card .concept-links {
  list-style: none;
  margin: 0;
  padding: 0.7rem 0 0;
  border-top: 1px solid var(--rule-soft);
}
.map-card .concept-links li { font-size: 0.88rem; margin: 0.2rem 0; color: var(--margin-ink); }
.map-card .concept-links li::before { content: "\203A"; color: var(--accent); margin-right: 0.45rem; }

/* ---------- Hub: concept list ---------- */
.concept-index { list-style: none; margin: 2rem 0; padding: 0; }
.concept-index > li {
  border-top: 1px solid var(--rule);
  padding: 1.2rem 0;
}
.concept-index > li:last-child { border-bottom: 1px solid var(--rule); }
.concept-index a.ci-title {
  font-size: 1.35rem;
  font-style: italic;
  color: var(--ink);
  display: inline-block;
}
.concept-index a.ci-title:hover { color: var(--accent); text-decoration: none; }
.concept-index .ci-tagline {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--margin-ink);
  margin-left: 0.75rem;
}
.concept-index .ci-idea { color: var(--ink-soft); margin: 0.35rem 0 0; max-width: 40rem; }

/* ---------- Concept page ---------- */
.concept-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 15rem;
  column-gap: 2.5rem;
}
.concept-layout > .margin { min-width: 0; }
.concept-body { min-width: 0; }
.concept-body p { max-width: 38rem; }
.concept-body h2 {
  font-size: 1.2rem;
  font-weight: 400;
  font-style: italic;
  margin: 2.2rem 0 0.6rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--rule-soft);
}

.big-idea {
  font-size: 1.25rem;
  line-height: 1.45;
  color: var(--ink);
  border-left: 3px solid var(--accent);
  padding: 0.2rem 0 0.2rem 1.1rem;
  margin: 0 0 1.8rem;
  max-width: 36rem;
}

.curiosity {
  background: rgba(27,58,91,0.04);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 1rem 1.2rem;
  margin: 1.8rem 0;
  max-width: 38rem;
}
.curiosity .ci-label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-navy);
  font-weight: 700;
  margin-bottom: 0.35rem;
}
.curiosity p { margin: 0; font-style: italic; color: var(--ink-soft); }

/* Before / after */
.ba { margin: 1.2rem 0 1.4rem; border-left: 3px solid var(--rule); padding-left: 1.1rem; }
.ba .ba-row { margin-bottom: 0.9rem; }
.ba .ba-row:last-child { margin-bottom: 0; }
.ba .label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-weight: 700;
  display: block;
  margin-bottom: 0.25rem;
}
.ba .before .label { color: var(--margin-ink); }
.ba .after .label { color: var(--accent); }
.ba .txt { font-size: 0.98rem; line-height: 1.45; }
.ba .before .txt { color: var(--ink-soft); }

/* Prompt block */
.prompt-block {
  margin: 1.2rem 0 0;
  border: 1px solid var(--rule);
  background: var(--code-bg);
  border-radius: 2px;
}
.prompt-block .prompt-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.85rem;
  border-bottom: 1px solid var(--rule);
}
.prompt-block .prompt-head .ph-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--margin-ink);
  font-weight: 700;
}
.prompt-block pre {
  margin: 0;
  padding: 0.85rem;
  overflow-x: auto;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--ink);
  white-space: pre-wrap;
  word-wrap: break-word;
}
button.copy-btn {
  font-family: Palatino, Georgia, serif;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 0.28rem 0.7rem;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}
button.copy-btn:hover { background: var(--accent); color: var(--bg); }
button.copy-btn.copied { background: var(--success); border-color: var(--success); color: var(--bg); }

/* Margin notes / sidenotes */
.margin .sidenote {
  font-size: 0.85rem;
  line-height: 1.4;
  color: var(--margin-ink);
  border-top: 1px solid var(--rule-soft);
  padding-top: 0.5rem;
}
.margin .sidenote .sn-label {
  font-variant: small-caps;
  letter-spacing: 0.04em;
  color: var(--accent);
  font-weight: 700;
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.9rem;
}
.margin .sidenote + .sidenote { margin-top: 1.1rem; }

/* Related / explore */
.related { margin-top: 1.4rem; }
.related h3 {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--margin-ink);
  font-weight: 700;
  margin: 0 0 0.6rem;
}
.related ul { list-style: none; margin: 0; padding: 0; }
.related li { margin: 0.35rem 0; font-size: 0.9rem; }
.related li .rel-tag { display: block; font-size: 0.78rem; color: var(--margin-ink); font-style: italic; }

/* ---------- Tables (Tufte) ---------- */
table.tufte { border-collapse: collapse; width: 100%; margin: 1.5rem 0; font-size: 0.95rem; }
table.tufte caption {
  text-align: left;
  font-style: italic;
  color: var(--margin-ink);
  margin-bottom: 0.6rem;
  font-size: 0.95rem;
}
table.tufte thead th {
  border-bottom: 2px solid var(--ink);
  padding: 0.4rem 0.9rem;
  font-weight: 700;
  font-size: 0.82rem;
  vertical-align: bottom;
}
table.tufte thead th .th-sub { font-weight: 400; }
table.tufte tbody td {
  border-bottom: 1px solid var(--rule-soft);
  padding: 0.4rem 0.9rem;
  font-variant-numeric: tabular-nums;
}
table.tufte .a-left { text-align: left; }
table.tufte .a-right { text-align: right; }
table.tufte tbody tr:hover td { background: rgba(123,17,19,0.04); }

/* ---------- Calculator ---------- */
.calc {
  margin: 2rem 0;
  padding: 1.6rem;
  border: 1px solid var(--rule);
  background: rgba(27,58,91,0.03);
  border-radius: 2px;
}
.calc h3 { margin: 0 0 1rem; font-size: 1.15rem; font-weight: 400; font-style: italic; border: none; padding: 0; }
.calc-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1.2rem; align-items: end; }
.calc label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--margin-ink);
  font-weight: 700;
  margin-bottom: 0.35rem;
}
.calc input[type="number"], .calc select {
  width: 100%;
  font-family: Palatino, Georgia, serif;
  font-size: 1rem;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--rule);
  background: var(--bg);
  color: var(--ink);
  border-radius: 2px;
}
.calc input:focus, .calc select:focus { outline: none; border-color: var(--accent-navy); }
.calc-output {
  margin-top: 1.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
}
.calc-output .metric .val {
  font-size: 1.8rem;
  font-style: italic;
  color: var(--accent);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.calc-output .metric .cap {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--margin-ink);
  margin-top: 0.2rem;
}
.calc .built-prompt { margin-top: 1.5rem; }

/* ---------- Prev / next pager ---------- */
.pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--rule);
}
.pager a {
  display: block;
  max-width: 45%;
  color: var(--ink);
}
.pager a:hover { text-decoration: none; }
.pager a:hover .pg-title { color: var(--accent); }
.pager .pg-dir {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--margin-ink);
  display: block;
  margin-bottom: 0.2rem;
}
.pager .pg-title { font-style: italic; font-size: 1.05rem; }
.pager .next { text-align: right; margin-left: auto; }

code.inline {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85em;
  background: var(--code-bg);
  padding: 0.05em 0.35em;
  border-radius: 2px;
}

/* ---------- Footer ---------- */
footer.colophon {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-size: 0.85rem;
  color: var(--margin-ink);
  font-style: italic;
  max-width: 40rem;
}
footer.colophon a { color: var(--accent); }

/* ============================================================
   Diátaxis additions
   ============================================================ */

/* ---------- Mode nav (site header) ---------- */
.mode-nav { display: flex; flex-wrap: wrap; gap: 0.15rem 0.4rem; align-items: baseline; }
.mode-nav .mode-link {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--margin-ink);
  padding: 0.2rem 0.55rem;
  border: 1px solid transparent;
  border-radius: 2px;
}
.mode-nav .mode-link:hover { color: var(--accent); border-color: var(--rule); }
.mode-nav .mode-link.active { color: var(--accent); border-color: var(--accent); }

/* breadcrumb now sits on its own row under the header */
.breadcrumb {
  padding: 0.75rem 0 0;
  margin-bottom: 1.6rem;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.9rem;
}

/* ---------- Home: Diátaxis compass ---------- */
.mode-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.4rem;
  margin: 2rem 0 3rem;
}
.mode-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--rule);
  border-top: 3px solid var(--accent);
  background: var(--card-bg);
  padding: 1.3rem 1.4rem 1.5rem;
  border-radius: 2px;
  color: var(--ink);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.mode-card.study { border-top-color: var(--accent-navy); }
.mode-card:hover { box-shadow: 0 6px 20px rgba(17,17,17,0.08); transform: translateY(-2px); }
.mode-card .mc-axis {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--margin-ink);
  font-weight: 700;
}
.mode-card h2 { font-size: 1.5rem; font-weight: 400; font-style: italic; margin: 0.2rem 0 0.3rem; }
.mode-card .mc-tag { font-size: 0.92rem; color: var(--accent); margin: 0 0 0.7rem; font-style: italic; }
.mode-card .mc-blurb { font-size: 0.9rem; color: var(--ink-soft); margin: 0 0 1rem; }
.mode-card .mc-count {
  margin-top: auto;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--margin-ink);
  border-top: 1px solid var(--rule-soft);
  padding-top: 0.7rem;
}

/* ---------- Home / section demos ---------- */
.home-demo {
  margin: 3rem 0 0;
  padding-top: 1.6rem;
  border-top: 1px solid var(--rule);
}
.home-demo .section-title,
h2.section-title { font-size: 1.5rem; font-weight: 400; font-style: italic; margin: 0.2rem 0 0.6rem; border: none; padding: 0; }
.home-demo > p { max-width: 38rem; color: var(--ink-soft); }

/* ---------- Reference index: split card head + links ---------- */
.map-card-head { display: block; color: var(--ink); }
.map-card-head:hover h2 { color: var(--accent); }

/* ---------- Track cards (tutorials / how-to / explanation) ---------- */
.track-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.4rem;
  margin: 2rem 0;
}
.track-card {
  display: block;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  background: var(--card-bg);
  padding: 1.2rem 1.3rem 1.4rem;
  border-radius: 2px;
  color: var(--ink);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.track-card:hover { box-shadow: 0 6px 20px rgba(17,17,17,0.08); transform: translateY(-2px); }
.track-card .numeral {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-style: italic;
  color: var(--accent);
}
.track-card h2 { font-size: 1.3rem; font-weight: 400; margin: 0.25rem 0 0.4rem; line-height: 1.15; }
.track-card .tc-tag { font-size: 0.92rem; color: var(--ink-soft); font-style: italic; margin: 0 0 0.6rem; }
.track-card .tc-outcome { font-size: 0.88rem; color: var(--ink-soft); margin: 0; }
.track-card .tc-key { font-weight: 700; color: var(--margin-ink); text-transform: uppercase; font-size: 0.7rem; letter-spacing: 0.1em; }

/* ---------- Callout (tutorial / how-to meta) ---------- */
.callout {
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent-navy);
  background: rgba(27,58,91,0.04);
  border-radius: 2px;
  padding: 1rem 1.2rem;
  margin: 1.6rem 0 2rem;
  max-width: 40rem;
}
.callout p { margin: 0.3rem 0; font-size: 0.95rem; }
.callout .co-key {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-navy);
  font-weight: 700;
  margin-right: 0.4rem;
}

/* ---------- Tutorial steps ---------- */
ol.steps { list-style: none; counter-reset: none; margin: 2rem 0; padding: 0; }
ol.steps > li.step {
  border-top: 1px solid var(--rule);
  padding: 1.6rem 0;
}
ol.steps > li.step:last-child { border-bottom: 1px solid var(--rule); }
.step-head { display: flex; align-items: baseline; gap: 0.8rem; }
.step-head h2 { border: none; margin: 0; padding: 0; font-size: 1.25rem; font-style: italic; font-weight: 400; }
.step-n {
  flex: none;
  width: 1.7rem; height: 1.7rem;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent); color: var(--bg);
  border-radius: 50%;
  font-size: 0.85rem; font-weight: 700;
  font-variant-numeric: tabular-nums;
}
ol.steps > li.step > p { margin: 0.7rem 0; max-width: 40rem; }
.step-ref {
  font-size: 0.82rem;
  color: var(--margin-ink);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.recap {
  margin: 2rem 0;
  padding: 1.2rem 1.4rem;
  background: rgba(44,95,45,0.05);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--success);
  border-radius: 2px;
  max-width: 40rem;
}
.recap .recap-label {
  display: block;
  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.15em;
  color: var(--success); font-weight: 700; margin-bottom: 0.35rem;
}
.recap p { margin: 0; }

/* ---------- How-to steps ---------- */
ol.howto-steps { max-width: 40rem; padding-left: 1.3rem; }
ol.howto-steps li { margin: 0.6rem 0; padding-left: 0.3rem; }

/* ---------- Block-level related (tutorials/how-to/explanation) ---------- */
.block-related {
  margin: 2.5rem 0 0;
  border-top: 1px solid var(--rule);
  padding-top: 1.2rem;
  max-width: 40rem;
}
.block-related h3 {
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.15em;
  color: var(--margin-ink); font-weight: 700; margin: 0 0 0.7rem;
}
.block-related ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 0.6rem 1.4rem; }
.block-related li { margin: 0; font-size: 0.92rem; }
.block-related li .rel-tag { display: block; font-size: 0.78rem; color: var(--margin-ink); font-style: italic; }

/* ---------- Explanation essay ---------- */
.essay { max-width: 38rem; }
.essay p { margin: 0 0 1.1rem; }

/* ---------- Multi-variant examples ---------- */
figure.variants { margin: 1.4rem 0 1.6rem; }
figure.variants figcaption {
  font-style: italic; color: var(--margin-ink);
  font-size: 0.95rem; margin-bottom: 0.9rem;
}
.var-source {
  border-left: 3px solid var(--rule);
  padding: 0.2rem 0 0.2rem 1rem;
  margin-bottom: 1rem;
}
.var-source .label {
  display: block;
  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.14em;
  font-weight: 700; color: var(--margin-ink); margin-bottom: 0.25rem;
}
.var-source .txt { color: var(--ink-soft); font-style: italic; }
ul.var-grid {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}
li.var-card {
  border: 1px solid var(--rule);
  border-top: 3px solid var(--accent-navy);
  background: var(--card-bg);
  border-radius: 2px;
  padding: 0.9rem 1rem 1rem;
}
.var-card .var-label {
  display: block;
  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.12em;
  font-weight: 700; color: var(--accent); margin-bottom: 0.4rem;
}
.var-card .var-text { margin: 0 0 0.5rem; font-size: 0.98rem; line-height: 1.45; }
.var-card .var-note {
  margin: 0; font-size: 0.8rem; color: var(--margin-ink); font-style: italic;
  border-top: 1px solid var(--rule-soft); padding-top: 0.5rem;
}

/* ---------- Prose smells ---------- */
.smell-banner {
  display: block;
  margin: 2.5rem 0;
  padding: 1.4rem 1.6rem;
  border: 1px solid var(--accent);
  border-left: 4px solid var(--accent);
  border-radius: 2px;
  background: var(--code-bg);
  text-decoration: none;
}
.smell-banner, .smell-banner:hover, .smell-banner * { text-decoration: none; }
.smell-banner:hover { background: var(--bg); }
.smell-banner:hover .sb-title { color: var(--accent); }
.smell-banner .sb-eyebrow {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  font-weight: 700;
}
.smell-banner .sb-title {
  display: block;
  font-size: 1.5rem;
  color: var(--ink);
  margin: 0.3rem 0;
}
.smell-banner .sb-blurb {
  display: block;
  color: var(--ink-soft);
  max-width: 42rem;
}
.smell-index {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem 1.5rem;
  margin: 1.5rem 0 2.5rem;
  padding: 1.2rem 1.4rem;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: var(--code-bg);
}
.smell-index a {
  font-style: italic;
  color: var(--ink);
  padding: 0.15rem 0;
}
.smell-index a:hover { color: var(--accent); text-decoration: none; }
.smell {
  margin: 3rem 0;
  padding-top: 2rem;
  border-top: 2px solid var(--rule);
  scroll-margin-top: 1.5rem;
}
.smell h2 { margin-top: 0; }
.smell .ba { margin: 1.2rem 0; }
.smell-ref {
  font-size: 0.8rem;
  color: var(--margin-ink);
  margin: 0.9rem 0 0;
}
.smell-ref a { color: var(--margin-ink); }
.smell-ref a:hover { color: var(--accent); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .concept-layout { grid-template-columns: 1fr; row-gap: 1.4rem; }
  .concept-layout > .margin {
    border-left: 3px solid var(--rule);
    padding-left: 1.1rem;
  }
  .margin .sidenote { border-top: none; padding-top: 0; }
  .margin .sidenote:first-child { padding-top: 0; }
}
@media (max-width: 620px) {
  body { font-size: 18px; }
  .wrap { padding: 1.5rem 1.2rem 4rem; }
  .hero h1 { font-size: 2.2rem; }
  .pager a { max-width: 48%; }
}