/* Mushen Family History — page implementation of frontend-spec.md.
   Every colour, face and radius comes from assets/classical.css tokens.
   Ink levels per spec §4: 100 headings · 82 body · 70 labels · 62 captions
   · 58 definition terms · 50 rail metadata. */

:root {
  --rail-w: 274px;
  --measure: 1080px;
  --gutter: clamp(24px, 4vw, 72px);
  --ink-82: color-mix(in srgb, var(--color-text) 82%, transparent);
  --ink-70: color-mix(in srgb, var(--color-text) 70%, transparent);
  --ink-62: color-mix(in srgb, var(--color-text) 62%, transparent);
  --ink-58: color-mix(in srgb, var(--color-text) 58%, transparent);
  --ink-50: color-mix(in srgb, var(--color-text) 50%, transparent);
  --band: #14120f;
  --band-ink: #f3f2f2;
}

html { scroll-behavior: smooth; }

/* Standing figures take tabular lining numerals; running prose keeps text
   figures. Spec §4. */
.kicker, .stat b, .meta, .table td, .table th, .rail-sub,
.lifespan, .colophon-kick, .progress-label, .crossing-date {
  font-feature-settings: 'tnum' 1;
  font-variant-numeric: tabular-nums lining-nums;
}

.kicker {
  font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--color-accent-700); margin: 0 0 var(--space-3);
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 60;
  padding: var(--space-2) var(--space-3); background: var(--color-bg);
  border: 1px solid var(--color-accent); border-radius: var(--radius-md);
}
.skip-link:focus-visible { left: var(--space-3); top: var(--space-3); }

/* ═══════════════════════════ rail ═══════════════════════════ */

[data-rail] {
  position: fixed; left: 0; top: 0; width: var(--rail-w); height: 100vh;
  display: flex; flex-direction: column;
  padding: var(--space-8) 0 var(--space-4);
  background: var(--color-bg);
  border-right: 1px solid var(--color-divider);
  z-index: 20;
}
.rail-head { padding: 0 var(--space-6) var(--space-6); }
.wordmark {
  display: block; font-family: var(--font-heading); font-weight: 400;
  font-size: 30px; line-height: 1; letter-spacing: -0.042em;
  color: var(--color-text); text-decoration: none; margin-left: -0.042em;
}
.rail-sub {
  margin: var(--space-2) 0 0; font-size: 11.5px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--ink-50);
}

[data-index] { flex: 1; min-height: 0; overflow-y: auto; padding: 0 var(--space-6); }
.index-group + .index-group { margin-top: var(--space-6); }
.index-label {
  font-size: 11px; letter-spacing: 0.11em; text-transform: uppercase;
  color: var(--color-accent-700); margin: 0 0 var(--space-2);
}
.index-group ul { list-style: none; margin: 0; padding: 0; }

[data-navlink] {
  display: block; padding: 5px 0 5px 11px; font-size: 13px; line-height: 1.35;
  color: var(--color-text); text-decoration: none;
  border-left: 1px solid transparent;
  transition: color .25s ease, border-color .25s ease, background-color .2s ease;
}
[data-navlink] .num {
  display: inline-block; width: 2.1em; color: var(--ink-50);
  font-feature-settings: 'tnum' 1;
}
[data-navlink] .sub { display: block; font-size: 11px; color: var(--ink-50); }

.rail-foot { padding: var(--space-4) var(--space-6) 0; }
.progress-track { height: 1px; background: var(--color-divider); }
.progress-bar { display: block; height: 1px; width: 0; background: var(--color-accent); }
.progress-label {
  margin: var(--space-2) 0 0; font-size: 11px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--ink-50);
}

/* ═══════════════════════════ main ═══════════════════════════ */

[data-main] { margin-left: var(--rail-w); }

[data-main] > section,
[data-main] > header {
  max-width: var(--measure); margin-inline: auto;
  padding-inline: var(--gutter);
  padding-block: clamp(56px, 9vh, 104px);
}

/* Reveal — direct children of main. Spec §6.
   The hidden state is set in CSS and gated on .reveal-enabled, which the head
   script adds only when motion is allowed and IntersectionObserver exists — so
   the page never paints hidden content it cannot then reveal. */
.reveal-enabled [data-main] > section,
.reveal-enabled [data-main] > [data-colophon],
.reveal-enabled [data-main] > header { opacity: 0; transform: translateY(16px); }
.reveal-enabled [data-main] > .reveal-on { opacity: 1; transform: none; }
.reveal-enabled [data-main] > * {
  transition: opacity .7s ease, transform .7s cubic-bezier(.2, .7, .3, 1);
}

/* — hero — */
#top { padding-top: clamp(72px, 15vh, 168px); }
/* The headline spans the full measure so it sets on two lines; the dek and the
   plate share the row beneath it. Sized so the longer line (33 characters) fits
   the 1080px measure without a third wrap. */
.display {
  font-family: var(--font-heading); font-weight: 400;
  font-size: clamp(30px, 5.1vw, 67px); line-height: 1.04;
  letter-spacing: -0.042em; margin: 0 0 clamp(28px, 4vh, 52px);
  margin-left: -0.042em;
}
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) 300px;
  gap: clamp(32px, 5vw, 72px); align-items: end;
}
.dek {
  font-size: 17px; line-height: 30px; color: var(--ink-82);
  max-width: 46ch; margin: 0 0 var(--space-4);
}
.hint {
  font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-50); margin: 0;
}

/* — stat row — */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}
[data-main] > section.stats { padding-block: var(--space-8); }
.stat b {
  display: block; font-family: var(--font-heading); font-weight: 400;
  font-size: clamp(34px, 4.4vw, 56px); line-height: 1; letter-spacing: -0.03em;
  color: var(--color-text);
}
/* Spec §5 — exactly one filled accent moment on the light ground. */
.stat--accent b { color: var(--color-accent); margin-left: -0.129em; }
.stat span {
  display: block; margin-top: var(--space-2); font-size: 11.5px;
  letter-spacing: 0.09em; text-transform: uppercase; color: var(--ink-70);
}

/* — colophon divider — */
[data-colophon] {
  background: var(--band); color: var(--band-ink);
  padding-block: clamp(64px, 12vh, 120px);
}
.colophon-inner {
  max-width: var(--measure); margin-inline: auto; padding-inline: var(--gutter);
  display: grid; grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-8); align-items: center;
}
.colophon-kick {
  font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--color-accent-400); margin: 0 0 var(--space-3);
}
.colophon-title {
  font-family: var(--font-heading); font-weight: 400;
  font-size: clamp(36px, 4.6vw, 66px); line-height: 1.04;
  letter-spacing: -0.042em; margin: 0 0 var(--space-4); margin-left: -0.042em;
}
.colophon-dek {
  max-width: 46ch; margin: 0; font-size: 15px; line-height: 27px;
  color: color-mix(in srgb, var(--band-ink) 74%, transparent);
}
[data-ghost] {
  font-family: var(--font-heading); font-weight: 400;
  font-size: clamp(80px, 12vw, 180px); line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px color-mix(in srgb, var(--color-accent) 55%, transparent);
  user-select: none;
}
[data-dividers="light"] [data-colophon] {
  background: var(--color-bg); color: var(--color-text);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}
[data-dividers="light"] .colophon-kick { color: var(--color-accent-700); }
[data-dividers="light"] .colophon-dek { color: var(--ink-70); }
[data-dividers="light"] [data-ghost] {
  -webkit-text-stroke-color: color-mix(in srgb, var(--color-accent) 75%, transparent);
}

/* — epoch body — */
.era-copy { font-size: 15.5px; line-height: 28px; color: var(--ink-82); }
.era-copy p { text-align: justify; hyphens: auto; }

.cols-2 { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 3.4vw, 54px); }
.cols-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(24px, 2.6vw, 40px); }
.split { display: grid; grid-template-columns: 380px minmax(0, 1fr); gap: clamp(32px, 4vw, 64px); align-items: start; }

.aside-margin {
  border-left: 1px solid var(--color-divider); padding-left: 26px;
  margin-top: var(--space-6);
}
.aside-margin h3 {
  font-size: 11px; letter-spacing: 0.11em; text-transform: uppercase;
  font-family: var(--font-body); font-weight: 600;
  color: var(--color-accent-700); margin: 0 0 var(--space-3);
}
.aside-margin dl { margin: 0; font-size: 13.5px; line-height: 22px; }
.aside-margin dt { color: var(--ink-58); }
.aside-margin dd { margin: 0 0 var(--space-3); color: var(--color-text); }

figure.plate-fig { margin: var(--space-6) 0 0; }
figure.plate-fig img { width: 100%; height: 100%; object-fit: cover; }
figure.plate-fig figcaption {
  font-size: 13px; line-height: 20px; color: var(--ink-62); margin-top: var(--space-3);
}
.ratio-21-9 { aspect-ratio: 21 / 9; }
.ratio-4-5  { aspect-ratio: 4 / 5; }
.ratio-3-2  { aspect-ratio: 3 / 2; }
.ratio-3-4  { aspect-ratio: 3 / 4; }
.ratio-hero { aspect-ratio: 1093 / 1400; }

.crossing-list { list-style: none; margin: var(--space-6) 0 0; padding: 0; }
.crossing-list li {
  display: grid; grid-template-columns: 5.4em minmax(0, 1fr);
  gap: var(--space-4); padding: var(--space-3) 0;
  border-top: 1px solid var(--color-divider); font-size: 14px; line-height: 22px;
}
.crossing-list li:last-child { border-bottom: 1px solid var(--color-divider); }
.crossing-date { color: var(--color-accent-700); }

/* — figure spread — */
[data-anchor].spread {
  display: grid; grid-template-columns: 200px minmax(0, 1fr);
  gap: clamp(32px, 4vw, 64px); align-items: start;
  border-top: 1px solid var(--color-divider);
}
.spread-name {
  font-family: var(--font-heading); font-weight: 400;
  font-size: clamp(28px, 3.2vw, 42px); line-height: 1.05;
  letter-spacing: -0.042em; margin: 0 0 var(--space-2); margin-left: -0.042em;
}
.meta {
  font-size: 11.5px; letter-spacing: 0.09em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 60%, transparent);
  margin: 0 0 var(--space-4);
}
.spread p.body { max-width: 62ch; text-align: justify; hyphens: auto; color: var(--ink-82); line-height: 27px; }
blockquote.pull {
  margin: var(--space-6) 0 0; padding-left: var(--space-4);
  border-left: 1px solid var(--color-accent);
  font-family: var(--font-heading); font-weight: 400;
  font-size: 24px; line-height: 34px; text-indent: -0.34em;
}
blockquote.pull cite {
  display: block; margin-top: var(--space-3); text-indent: 0;
  font-family: var(--font-body); font-style: normal; font-size: 11.5px;
  letter-spacing: 0.09em; text-transform: uppercase; color: var(--ink-58);
}

/* — records — */
.table caption {
  text-align: left; font-size: 11px; letter-spacing: 0.11em;
  text-transform: uppercase; color: var(--color-accent-700);
  padding-bottom: var(--space-3);
}
.table-wrap { overflow-x: auto; margin-top: var(--space-6); }
.provenance {
  margin-top: var(--space-8); border-left: 1px solid var(--color-divider);
  padding-left: 26px; font-size: 13.5px; line-height: 23px; color: var(--ink-70);
  max-width: 62ch;
}
.grade { font-size: 13px; line-height: 22px; color: var(--ink-70); }

/* — contribute + footer — */
.contribute-form {
  display: flex; gap: var(--space-2); align-items: flex-end;
  margin-top: var(--space-6); max-width: 460px;
}
.contribute-form .field { flex: 1; }
.site-foot {
  margin-top: var(--space-8); padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
  font-size: 11.5px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-50);
}

/* ═══════════════════════ responsive (spec §7) ═══════════════════════ */

@media (max-width: 1320px) {
  .cols-3 { grid-template-columns: 1fr; max-width: 62ch; }
}
@media (max-width: 1180px) {
  .cols-2 { grid-template-columns: 1fr; max-width: 62ch; }
  .aside-margin {
    border-left: 0; border-top: 1px solid var(--color-divider);
    padding-left: 0; padding-top: var(--space-4); max-width: 62ch;
  }
  .hero-grid { grid-template-columns: minmax(0, 1fr) 240px; }
}
@media (max-width: 1020px) {
  .split { grid-template-columns: 1fr; }
  [data-anchor].spread { grid-template-columns: 1fr; }
  [data-anchor].spread .spread-plate { max-width: 240px; }
  .hero-grid { grid-template-columns: 1fr; align-items: start; }
  .hero-grid .hero-plate { max-width: 300px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  [data-rail] {
    position: static; width: auto; height: auto; flex-direction: row;
    align-items: baseline; justify-content: space-between;
    padding: var(--space-4) var(--gutter);
    border-right: 0; border-bottom: 1px solid var(--color-divider);
  }
  .rail-head { padding: 0; display: flex; align-items: baseline; gap: var(--space-3); }
  .rail-sub { margin: 0; }
  [data-index], .rail-foot { display: none; }
  [data-main] { margin-left: 0; }
  .colophon-inner { grid-template-columns: 1fr; gap: var(--space-4); }
}
@media (max-width: 760px) {
  .era-copy p, .spread p.body { text-align: left; hyphens: manual; }
  .stats { grid-template-columns: 1fr 1fr; gap: var(--space-4); }
  .contribute-form { flex-direction: column; align-items: stretch; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal-enabled [data-main] > * { opacity: 1; transform: none; transition: none; }
}

/* ═══════════════ narrative components ═══════════════
   The spec's §10 budget of ~200 words per epoch was written against placeholder
   copy. The real record is carried by its stories, so these are the vehicles
   that hold them: person rosters, descent ladders, documentary quotation. */

/* — roster: the nine, the patriots — */
.people {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: clamp(24px, 2.6vw, 40px); margin-top: var(--space-8);
}
.person { display: grid; grid-template-columns: 8.6em minmax(0, 1fr); gap: var(--space-4); align-items: start; }
.person .who {
  font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ink-58); line-height: 1.55; padding-top: .4em;
  font-feature-settings: 'tnum' 1;
}
.person .who b {
  display: block; font-family: var(--font-heading); font-weight: 400;
  font-size: 19px; line-height: 1.15; letter-spacing: -0.025em;
  text-transform: none; color: var(--color-accent-700); margin-bottom: 2px;
}
.person p { margin: 0; font-size: 14px; line-height: 24px; color: var(--ink-82); }
@media (max-width: 1180px) { .people { grid-template-columns: 1fr; max-width: 62ch; } }
@media (max-width: 620px) {
  .person { grid-template-columns: 1fr; gap: var(--space-1); }
  .person .who { padding-top: 0; }
}

/* — descent ladder — */
.ladder {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px; line-height: 2.05; white-space: pre; overflow-x: auto;
  background: var(--color-surface); padding: var(--space-4) var(--space-6);
  margin: var(--space-6) 0; border-left: 1px solid var(--color-accent);
  font-feature-settings: 'tnum' 1;
}
.ladder b { color: var(--color-accent-700); font-weight: 600; }
.ladder .hi { color: var(--color-accent-800); font-weight: 600; }

/* — editorial note — */
.note {
  border-left: 1px solid var(--color-accent); padding-left: 26px;
  margin: var(--space-8) 0; font-size: 14px; line-height: 25px;
  color: var(--ink-70); max-width: 62ch;
}
.note b { color: var(--color-text); }

/* — documentary quotation (distinct from the display pull quote) — */
blockquote.doc {
  margin: var(--space-6) 0; padding-left: var(--space-6);
  border-left: 1px solid var(--color-divider);
  font-family: var(--font-heading); font-weight: 400;
  font-size: 21px; line-height: 31px; max-width: 56ch;
}
blockquote.doc cite {
  display: block; margin-top: var(--space-3); font-family: var(--font-body);
  font-style: normal; font-size: 11.5px; letter-spacing: 0.09em;
  text-transform: uppercase; color: var(--ink-58);
}

/* — image pairs and trios — */
.duo  { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(20px, 2.4vw, 34px); margin-top: var(--space-6); }
.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(16px, 2vw, 28px); margin-top: var(--space-6); }
.duo figure, .trio figure { margin: 0; }
.duo figcaption, .trio figcaption { font-size: 12px; line-height: 19px; color: var(--ink-62); margin-top: var(--space-2); }
@media (max-width: 900px) { .duo, .trio { grid-template-columns: 1fr; } }

/* — section headings outside the colophon bands — */
[data-main] > section > h2 {
  font-family: var(--font-heading); font-weight: 400;
  font-size: clamp(30px, 3.6vw, 46px); line-height: 1.06;
  letter-spacing: -0.042em; margin: 0 0 var(--space-4); margin-left: -0.042em;
}
[data-main] > section > h3, .era-copy h3, .story h3 {
  font-family: var(--font-heading); font-weight: 400; font-size: 26px;
  line-height: 1.1; letter-spacing: -0.03em; margin: var(--space-8) 0 var(--space-3);
}
h3 .yr {
  font-family: var(--font-body); font-size: 11px; letter-spacing: 0.09em;
  text-transform: uppercase; color: var(--color-accent-700);
  margin-left: .9em; vertical-align: .3em; font-feature-settings: 'tnum' 1;
}
.lead { font-size: 17px; line-height: 29px; color: var(--ink-82); max-width: 52ch; }
.story { font-size: 15.5px; line-height: 28px; color: var(--ink-82); max-width: 68ch; }
.story p { text-align: justify; hyphens: auto; }
@media (max-width: 760px) { .story p { text-align: left; hyphens: manual; } }

/* ═══════════════ westward drift chart ═══════════════
   Stacked share of each generation's American deaths by region. Ink drains
   out of the bar and accent fills it as the family moves west. */
.drift { margin: var(--space-8) 0; }
.drift-legend {
  display: flex; flex-wrap: wrap; gap: var(--space-4);
  font-size: 11px; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--ink-70); margin-bottom: var(--space-4);
}
.drift-legend span { display: inline-flex; align-items: center; gap: 7px; }
.drift-legend i { width: 11px; height: 11px; flex: none; border-radius: 1px; }
.drift-row {
  display: grid; grid-template-columns: 2.6em minmax(0, 1fr) 3.2em;
  gap: var(--space-3); align-items: center; padding: 3px 0;
  font-size: 11px; font-feature-settings: 'tnum' 1;
  font-variant-numeric: tabular-nums lining-nums;
}
.drift-gen { text-align: right; color: var(--ink-50); }
.drift-n { text-align: right; color: var(--ink-50); }
.drift-track { display: flex; height: 13px; background: var(--color-neutral-200); overflow: hidden; }
.drift-track span { display: block; height: 100%; }
.drift-break {
  grid-column: 1 / -1; display: grid;
  grid-template-columns: 2.6em minmax(0, 1fr) 3.2em; gap: var(--space-3);
  padding: 2px 0;
}
.drift-break span:nth-child(2) {
  border-top: 1px solid var(--color-accent); position: relative;
}
.drift-break em {
  position: absolute; top: -0.55em; right: 0; background: var(--color-bg);
  padding-left: 8px; font-style: normal; font-size: 10px; letter-spacing: 0.09em;
  text-transform: uppercase; color: var(--color-accent-700);
}

/* — frontier waypoints — */
.waypoints { list-style: none; margin: var(--space-8) 0 0; padding: 0; }
.waypoints li {
  display: grid; grid-template-columns: 4.4em minmax(0, 1fr);
  gap: var(--space-4); padding: var(--space-3) 0;
  border-top: 1px solid var(--color-divider); font-size: 14px; line-height: 23px;
}
.waypoints li:last-child { border-bottom: 1px solid var(--color-divider); }
.waypoints b {
  color: var(--color-accent-700); font-weight: 400;
  font-feature-settings: 'tnum' 1; font-variant-numeric: tabular-nums lining-nums;
}
.waypoints .place { color: var(--color-text); }
.waypoints .what { color: var(--ink-70); }
@media (max-width: 620px) {
  .waypoints li { grid-template-columns: 1fr; gap: 2px; }
}

/* — links in running prose: accent at paragraph size must use the deep step
     (6.0:1), never base accent (3.0:1, large text only). Spec §11. — */
.story a, .note a, .provenance a, figcaption a, .lead a, .body a, .sources a {
  color: var(--color-accent-700);
  text-decoration-color: color-mix(in srgb, var(--color-accent) 45%, transparent);
  text-underline-offset: 3px;
}
.story a:hover, .note a:hover, .provenance a:hover,
figcaption a:hover, .lead a:hover, .body a:hover, .sources a:hover {
  text-decoration-color: var(--color-accent);
}

/* — source list — */
.sources { list-style: none; margin: var(--space-6) 0 0; padding: 0; max-width: 68ch; }
.sources li {
  padding: var(--space-3) 0; border-top: 1px solid var(--color-divider);
  font-size: 13.5px; line-height: 22px; color: var(--ink-70);
}
.sources li:last-child { border-bottom: 1px solid var(--color-divider); }
.sources b { color: var(--color-text); font-weight: 600; }
.sources .src-note { display: block; color: var(--ink-58); }

/* — which war, in the roster's identity column — */
.person .who .war {
  display: block; margin-top: 5px; color: var(--color-accent-700);
  letter-spacing: 0.09em; font-size: 10px;
}

/* Identity column: name, dates, place, war — each on its own line, as block
   elements rather than a text node chasing a <br>. */
.person .who .yrs, .person .who .place, .person .who .war { display: block; }
.person .who .yrs { margin-top: 2px; }
.person .who .place { margin-top: 2px; }
.person .who .war { margin-top: 6px; color: var(--color-accent-700); font-size: 10px; }

/* Ladder column header — names what the left-hand figure actually is. */
.ladder .ladder-head {
  display: block; margin-bottom: .9em; padding-bottom: .5em;
  border-bottom: 1px solid var(--color-divider);
  color: var(--ink-58); letter-spacing: 0.06em; text-transform: uppercase;
  font-size: 10.5px;
}