/* =============================================================
   History of Robot — editorial newspaper stylesheet
   Visual reference: historyofmarket.com — centered masthead,
   roman-numeral section markers, double-rule dividers, mono
   small-caps labels, mixed italic+roman serif display.

   Modern web platform features used:
   - View Transitions API (single + cross-document)
   - <dialog>+popover command palette
   - CSS scroll-driven animations (animation-timeline)
   - CSS :has() parent selectors
   - text-wrap: balance / pretty
   - Container queries
   - color-mix(), oklch() wide-gamut colours
   - @property for typed animatable custom properties
   ============================================================= */

/* Cross-document view transitions (Chrome 126+, Edge, Safari TP) */
@view-transition { navigation: auto; }

/* Typed custom properties for smooth animations */
@property --nav-fill { syntax: "<color>"; inherits: true; initial-value: transparent; }
@property --rail-w   { syntax: "<length>"; inherits: true; initial-value: 0px; }

:root {
  /* ── Fonts ── */
  --f-display: "Bricolage Grotesque", "Inter", system-ui, sans-serif;
  --f-sans:    "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --f-serif:   "Fraunces", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  --f-mono:    "JetBrains Mono", "SFMono-Regular", Menlo, Monaco, monospace;

  /* ── Type scale ── */
  --fs-nano:    clamp(9.5px, .62vw, 11px);
  --fs-micro:   clamp(10.5px, .72vw, 12px);
  --fs-caption: clamp(12px, .85vw, 14px);
  --fs-base:    clamp(15px, 1vw, 17px);
  --fs-lead:    clamp(17px, 1.2vw, 20px);
  --fs-h4:      clamp(20px, 1.6vw, 26px);
  --fs-h3:      clamp(26px, 2.2vw, 38px);
  --fs-h2:      clamp(38px, 4vw, 64px);
  --fs-display: clamp(48px, 8vw, 128px);
  --fs-mast:    clamp(32px, 5.6vw, 88px);

  --lh-tight: 1.05;
  --lh-snug:  1.22;
  --lh-base:  1.5;
  --lh-relax: 1.7;

  /* ── Palette: pure-ish black on barely-warm paper ── */
  --paper:        #FAF8F0;
  --paper-elev:   #F4F1E6;
  --paper-mute:   #ECE7D8;
  --ink:          #0A0A0A;
  --ink-2:        #1C1C1C;
  --ink-mute:     #5B5B5B;
  --ink-faint:    #8C8C8C;
  --rule:         #1A1A1A;
  --rule-soft:    #D6D0BD;
  --rule-ghost:   rgba(10, 10, 10, .08);
  --accent:       #0A0A0A;  /* monochrome — no gold */
  --link:         #1A1A1A;
  --positive:     #2F6B4F;
  --negative:     #8B2E2E;

  /* ── Layout ── */
  --gutter:  clamp(20px, 4vw, 56px);
  --max-w:   1440px;
  --col-gap: clamp(28px, 4vw, 56px);
}

[data-theme="dark"] {
  --paper:      #0E0E0C;
  --paper-elev: #161614;
  --paper-mute: #1E1E1A;
  --ink:        #EDE7D6;
  --ink-2:      #DAD3C0;
  --ink-mute:   #9A9282;
  --ink-faint:  #6B6452;
  --rule:       #DCD4C0;
  --rule-soft:  #3A352C;
  --rule-ghost: rgba(237, 231, 214, .10);
  --accent:     #EDE7D6;
  --link:       #EDE7D6;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--f-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--ink);
  background: var(--paper);
  font-feature-settings: "kern", "liga", "calt";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a   { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.tnum { font-variant-numeric: tabular-nums; }

/* Utility text */
.eyebrow {
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 500;
}
.eyebrow .dash { color: var(--ink-faint); margin-right: 6px; }
.smcaps {
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .22em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--ink-mute);
}

/* ═════════════════════════════════════════════════════════════
   MASTHEAD — centered nameplate, two metadata gutters, hairline
   ═════════════════════════════════════════════════════════════ */
.mast {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 10px var(--gutter) 8px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  background: var(--paper);
}
.mast-left, .mast-right {
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  line-height: 1.4;
}
.mast-right { text-align: right; }
.mast-left .rule, .mast-right .rule { display: inline-block; width: 18px; border-top: 1px solid var(--ink-mute); vertical-align: middle; margin-right: 8px; }
.mast-right .rule { margin-right: 0; margin-left: 8px; }

.mast-controls {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
  margin-bottom: 4px;
}

.btn {
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--rule);
  padding: 6px 10px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background .12s, color .12s;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn .kbd {
  font-family: var(--f-mono);
  font-size: 10px;
  color: var(--ink-mute);
  border: 1px solid var(--rule-soft);
  padding: 0 4px;
  border-radius: 2px;
  margin-left: 4px;
}
.btn:hover .kbd { color: var(--paper); border-color: var(--paper); }

.nameplate {
  text-align: center;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: var(--fs-mast);
  line-height: .92;
  letter-spacing: -0.025em;
  text-transform: uppercase;
  color: var(--ink);
  font-feature-settings: "ss01", "ss02";
}
.nameplate-sub {
  text-align: center;
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: 6px;
}
.nameplate-sub::before, .nameplate-sub::after { content: "·"; margin: 0 10px; color: var(--ink-faint); }

.mast-foot {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding: 6px var(--gutter);
  border-bottom: 1px solid var(--rule-soft);
}
.mast-foot a {
  padding: 5px 12px;
  border: 1px solid transparent;
  color: var(--ink-mute);
  transition: border-color .15s, color .15s, background .15s;
}
.mast-foot a:hover { color: var(--ink); border-color: var(--rule-soft); text-decoration: none; }
.mast-foot a.is-current { color: var(--ink); border-color: var(--rule); background: var(--paper-elev); }
.mast-foot a.is-sister {
  color: var(--ink);
  border-color: var(--rule);
  background: transparent;
  font-weight: 600;
}
.mast-foot a.is-sister::before { content: "→"; margin-right: 6px; color: var(--ink-faint); }
.mast-foot a.is-sister:hover { background: var(--ink); color: var(--paper); }
.mast-foot .dot { color: var(--ink-faint); }

/* ═════════════════════════════════════════════════════════════
   SECTION NAV — § I § II § III … with right-side ISSUE date
   ═════════════════════════════════════════════════════════════ */
.section-nav {
  border-bottom: 1px solid var(--rule);
  padding: 16px var(--gutter);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
}
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tab {
  display: inline-grid;
  grid-template-columns: auto auto;
  align-items: baseline;
  gap: 10px;
  padding: 10px 16px;
  border: 1px solid var(--rule-soft);
  background: transparent;
  color: var(--ink);
  font-family: var(--f-sans);
  font-size: var(--fs-caption);
  line-height: 1.15;
  text-decoration: none;
  transition: border-color .12s, background .12s;
  min-width: 88px;
}
.tab:hover { border-color: var(--rule); text-decoration: none; }
.tab.active { border-color: var(--rule); border-width: 1px; background: var(--paper-elev); }
.tab .roman {
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .12em;
  color: var(--ink-mute);
}
.tab .label {
  font-weight: 500;
  letter-spacing: -.005em;
}
.section-nav-right {
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  white-space: nowrap;
}
@media (max-width: 880px) {
  .section-nav { grid-template-columns: 1fr; }
  .section-nav-right { display: none; }
}

/* ═════════════════════════════════════════════════════════════
   SHELL & MAIN — main column with sticky right-rail TOC
   ═════════════════════════════════════════════════════════════ */
.shell {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: clamp(24px, 3.5vw, 44px) var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  column-gap: clamp(28px, 3.5vw, 56px);
  align-items: start;
}
.shell main { min-width: 0; grid-column: 1 / 2; }
.shell .footer { grid-column: 1 / -1; }
@media (max-width: 1100px) {
  .shell { grid-template-columns: 1fr; }
  .rail-right { display: none; }
}

/* ─── Right rail (sticky in-document TOC) ─── */
.rail-right {
  grid-column: 2 / 3;
  position: sticky;
  top: 22px;
  align-self: start;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .04em;
  scrollbar-width: thin;
}
.rail-right ol {
  list-style: none;
  margin: 0;
  padding: 0;
}
.rail-right li {
  position: relative;
  padding: 0;
}
.rail-right a {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 6px 8px 6px 14px;
  margin: 1px 0;
  color: var(--ink-mute);
  border: 1px solid transparent;
  transition: color .12s, border-color .12s, background .12s;
  text-decoration: none;
  font-size: 11px;
}
.rail-right a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 8px;
  border-top: 1px solid var(--rule-soft);
  transform: translateY(-50%);
}
.rail-right a:hover {
  color: var(--ink);
  border-color: var(--rule-soft);
}
.rail-right a.active {
  color: var(--ink);
  border-color: var(--rule);
  background: var(--paper-elev);
}
.rail-right a.active::before {
  border-top-color: var(--ink);
  width: 12px;
}
.rail-right .roman {
  font-weight: 500;
  color: var(--ink-mute);
  letter-spacing: .08em;
  white-space: nowrap;
  text-transform: uppercase;
}
.rail-right a.active .roman { color: var(--ink); }
.rail-right .ttl {
  font-family: var(--f-sans);
  font-size: var(--fs-caption);
  font-weight: 400;
  color: inherit;
  text-transform: none;
  letter-spacing: 0;
  line-height: 1.25;
}
.rail-right .sister-block {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--rule-soft);
}
.rail-right .sister-block a {
  font-family: var(--f-sans);
  font-size: var(--fs-caption);
  color: var(--ink);
  border: 1px solid var(--rule);
  padding: 8px 10px 8px 14px;
  background: transparent;
  grid-template-columns: 1fr auto;
}
.rail-right .sister-block a::before { display: none; }
.rail-right .sister-block a::after { content: "→"; color: var(--ink-faint); }
.rail-right .sister-block a:hover { background: var(--ink); color: var(--paper); }
.rail-right .sister-block a:hover::after { color: var(--paper); }

/* ═════════════════════════════════════════════════════════════
   HERO — two-column cover with stats grid
   ═════════════════════════════════════════════════════════════ */
.cover {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: var(--col-gap);
  align-items: start;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--ink);
  position: relative;
  margin-bottom: 12px;
}
.cover::after {
  /* double-rule: a second hairline below the bottom border */
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -4px;
  border-top: 1px solid var(--ink);
}
.cover-left { min-width: 0; }
.cover-right { min-width: 0; }

.cover-eyebrow {
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}
.cover-eyebrow::before { content: ""; width: 36px; border-top: 1px solid var(--ink); }

.headline {
  font-family: var(--f-serif);
  font-weight: 900;
  font-size: var(--fs-h2);
  line-height: 1.04;
  letter-spacing: -0.022em;
  color: var(--ink);
  margin: 0 0 22px;
}
.headline em { font-style: italic; font-weight: 900; }
.headline .punct { font-style: normal; font-weight: 700; opacity: .8; }

.lede {
  font-family: var(--f-serif);
  font-size: var(--fs-lead);
  line-height: 1.55;
  color: var(--ink);
  margin: 0 0 28px;
  max-width: 56ch;
}

.cover-body {
  font-family: var(--f-serif);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--ink);
  column-count: 1;
}
.cover-body p { margin: 0 0 14px; max-width: 60ch; }

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--rule-soft);
  padding-top: 22px;
  margin-top: 12px;
  gap: 0;
}
.stat {
  padding: 0 22px;
  border-left: 1px solid var(--rule-soft);
}
.stat:first-child { padding-left: 0; border-left: 0; }
.stat .lbl {
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 8px;
}
.stat .val {
  font-family: var(--f-mono);
  font-size: clamp(22px, 2.4vw, 34px);
  line-height: 1.1;
  font-weight: 600;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 820px) {
  .cover { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(2) { padding-right: 0; }
  .stat:nth-child(3) { border-left: 0; padding-left: 0; padding-top: 16px; grid-column: 1 / -1; border-top: 1px solid var(--rule-soft); }
}

/* ═════════════════════════════════════════════════════════════
   ERA INDEX — § I, § II, § III rows after the cover
   ═════════════════════════════════════════════════════════════ */
.era-index {
  border-top: 1px solid var(--ink);
  padding-top: 22px;
  margin-top: 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.era-index-head {
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.era-index-head::before { content: ""; width: 36px; border-top: 1px solid var(--ink); }
.era-index-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px 24px;
}
.era-index a {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule-soft);
  color: var(--ink);
  transition: border-color .12s;
}
.era-index a:hover { text-decoration: none; border-color: var(--ink); }
.era-index a .roman {
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  letter-spacing: .12em;
  color: var(--ink-mute);
}
.era-index a .ttl {
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: var(--fs-base);
  letter-spacing: -.005em;
  line-height: 1.2;
}
.era-index a .sub {
  display: block;
  font-family: var(--f-serif);
  font-style: italic;
  font-weight: 400;
  font-size: var(--fs-caption);
  color: var(--ink-mute);
  margin-top: 4px;
}
@media (max-width: 1000px) { .era-index-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px)  { .era-index-grid { grid-template-columns: 1fr; } }

/* ═════════════════════════════════════════════════════════════
   ERA SECTION
   ═════════════════════════════════════════════════════════════ */
.era {
  margin: clamp(48px, 6vw, 88px) 0;
  scroll-margin-top: 24px;
}
.era-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
  gap: var(--col-gap);
  align-items: end;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--ink);
  position: relative;
  margin-bottom: 32px;
}
.era-head::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -4px;
  border-top: 1px solid var(--ink);
}
.era-marker {
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.era-marker::before { content: ""; width: 36px; border-top: 1px solid var(--ink); }
.era h2 {
  font-family: var(--f-serif);
  font-weight: 900;
  font-size: var(--fs-h2);
  line-height: 1.02;
  letter-spacing: -.018em;
  margin: 0;
  color: var(--ink);
}
.era h2 em { font-style: italic; }
.era-range {
  font-family: var(--f-mono);
  font-size: var(--fs-caption);
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: 10px;
}
.era-lead {
  font-family: var(--f-serif);
  font-size: var(--fs-lead);
  line-height: 1.65;
  color: var(--ink);
  margin: 0;
  max-width: 60ch;
}
@media (max-width: 820px) {
  .era-head { grid-template-columns: 1fr; }
}

/* ─── Event timeline ─── */
.events {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--rule-soft);
}
.event {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--rule-soft);
}
.event-year {
  font-family: var(--f-mono);
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  padding-top: 4px;
  border-top: 2px solid var(--ink);
  align-self: start;
}
.event-body { min-width: 0; }
.event h3 {
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: var(--fs-h4);
  line-height: 1.18;
  letter-spacing: -.005em;
  margin: 0 0 10px;
  color: var(--ink);
}
.event-desc {
  font-family: var(--f-serif);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--ink-2);
  margin: 0 0 14px;
  max-width: 64ch;
}
.event-sources {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  align-items: baseline;
}
.event-sources .sources-label {
  color: var(--ink-faint);
  letter-spacing: .22em;
  margin-right: 4px;
}
.event-sources a {
  color: var(--ink-2);
  border-bottom: 1px solid var(--rule-soft);
  padding-bottom: 1px;
  transition: border-color .12s, color .12s;
}
.event-sources a:hover {
  color: var(--ink);
  border-color: var(--ink);
  text-decoration: none;
}
.event-img {
  margin: 14px 0 16px;
  display: block;
  border: 1px solid var(--rule-soft);
  background: var(--paper-elev);
  max-width: 520px;
}
.event-img img {
  width: 100%;
  filter: saturate(.92) contrast(1.02);
}
[data-theme="dark"] .event-img img { filter: saturate(.7) contrast(.92) brightness(.85); }
.event-img figcaption {
  padding: 8px 12px;
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  color: var(--ink-faint);
  letter-spacing: .08em;
  border-top: 1px solid var(--rule-ghost);
}
@media (max-width: 640px) {
  .event { grid-template-columns: 1fr; gap: 10px; }
  .event-year { border-top: 2px solid var(--ink); padding-top: 6px; display: inline-block; padding-right: 0; align-self: start; }
}

/* ═════════════════════════════════════════════════════════════
   SECTION (charts, people, methods)
   ═════════════════════════════════════════════════════════════ */
.section {
  margin: clamp(48px, 6vw, 80px) 0;
  scroll-margin-top: 24px;
}
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
  gap: var(--col-gap);
  align-items: end;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ink);
  position: relative;
  margin-bottom: 28px;
}
.section-head::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -4px;
  border-top: 1px solid var(--ink);
}
.section-marker {
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-marker::before { content: ""; width: 36px; border-top: 1px solid var(--ink); }
.section h2 {
  font-family: var(--f-serif);
  font-weight: 900;
  font-size: var(--fs-h3);
  line-height: 1.05;
  letter-spacing: -.015em;
  margin: 0;
  color: var(--ink);
}
.section-lead {
  font-family: var(--f-serif);
  font-size: var(--fs-lead);
  line-height: 1.6;
  color: var(--ink);
  margin: 0 0 28px;
  max-width: 64ch;
}
@media (max-width: 820px) {
  .section-head { grid-template-columns: 1fr; }
}

/* ─── Charts ─── */
.chart {
  border: 1px solid var(--rule-soft);
  background: transparent;
  padding: 24px 28px 20px;
  margin-bottom: 24px;
}
.chart-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule-soft);
}
.chart h3 {
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: var(--fs-h4);
  margin: 0;
  color: var(--ink);
  letter-spacing: -.005em;
}
.chart .chart-sub {
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.chart figure { margin: 8px 0 6px; width: 100%; overflow: hidden; }
.chart svg { width: 100%; height: auto; display: block; }
.chart-source {
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  color: var(--ink-faint);
  letter-spacing: .08em;
  padding-top: 10px;
  border-top: 1px solid var(--rule-ghost);
  text-transform: uppercase;
}
.chart-source a { color: var(--ink-mute); border-bottom: 1px solid var(--rule-soft); }

/* ─── People cards ─── */
.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule-soft);
  border-left: 1px solid var(--rule-soft);
}
.person {
  border-right: 1px solid var(--rule-soft);
  border-bottom: 1px solid var(--rule-soft);
  padding: 24px 26px;
  background: transparent;
}
.person.has-portrait {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 16px;
  align-items: start;
}
.person-portrait {
  width: 88px;
  height: 88px;
  overflow: hidden;
  border: 1px solid var(--rule-soft);
  background: var(--paper-elev);
  flex-shrink: 0;
}
.person-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.02);
}
[data-theme="dark"] .person-portrait img { filter: saturate(0.7) contrast(0.92) brightness(0.85); }
.person-text { min-width: 0; }
@media (max-width: 480px) {
  .person.has-portrait { grid-template-columns: 64px 1fr; }
  .person-portrait { width: 64px; height: 64px; }
}

.person .name {
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: var(--fs-h4);
  margin: 0 0 4px;
  color: var(--ink);
  letter-spacing: -.005em;
}
.person .years {
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 12px;
}
.person .role {
  font-family: var(--f-sans);
  font-size: var(--fs-caption);
  color: var(--ink-2);
  line-height: 1.5;
  margin-bottom: 16px;
}
.person .quote {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: var(--fs-base);
  line-height: 1.55;
  color: var(--ink);
  border-top: 1px solid var(--rule-ghost);
  padding-top: 14px;
}

/* ─── Roster (humanoid page) ─── */
.roster-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--f-sans);
  font-size: var(--fs-caption);
  margin-top: 12px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.roster-table th, .roster-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--rule-soft);
}
.roster-table th {
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 500;
  border-bottom: 1px solid var(--ink);
}
.roster-table td.name {
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: var(--fs-base);
  color: var(--ink);
}
.roster-table td .company {
  display: block;
  font-family: var(--f-sans);
  font-weight: 400;
  font-size: var(--fs-nano);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: 4px;
}
.roster-table td.num { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
.roster-table tr:hover td { background: var(--paper-elev); }
.roster-scroll { overflow-x: auto; }

/* ─── Comparison table ─── */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--f-sans);
  font-size: var(--fs-caption);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  margin-top: 12px;
}
.compare-table th, .compare-table td {
  padding: 14px 14px;
  text-align: left;
  vertical-align: top;
  border-right: 1px solid var(--rule-soft);
  border-bottom: 1px solid var(--rule-soft);
}
.compare-table th:last-child, .compare-table td:last-child { border-right: 0; }
.compare-table th {
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 500;
  border-bottom: 1px solid var(--ink);
}
.compare-table td:first-child {
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  white-space: nowrap;
}

/* ─── Methods / sources list ─── */
.body-prose {
  font-family: var(--f-serif);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--ink);
  max-width: 68ch;
}
.body-prose p { margin: 0 0 16px; }
.body-prose code {
  font-family: var(--f-mono);
  font-size: .9em;
  background: var(--paper-elev);
  padding: 1px 6px;
  border-radius: 2px;
}
.source-list {
  columns: 2;
  column-gap: 40px;
  margin: 24px 0 0;
  font-family: var(--f-sans);
  font-size: var(--fs-caption);
  color: var(--ink-2);
  list-style: none;
  padding: 0;
}
.source-list li {
  break-inside: avoid;
  padding: 8px 0;
  border-bottom: 1px dashed var(--rule-soft);
}
.source-list a { border-bottom: 1px solid var(--rule-soft); }
.source-list a:hover { border-color: var(--ink); }
@media (max-width: 720px) { .source-list { columns: 1; } }

/* ═════════════════════════════════════════════════════════════
   FOOTER & PROGRESS
   ═════════════════════════════════════════════════════════════ */
.footer {
  border-top: 1px solid var(--ink);
  position: relative;
  margin-top: clamp(48px, 6vw, 96px);
  padding: 32px var(--gutter) 56px;
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .14em;
  color: var(--ink-mute);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.footer::before {
  content: "";
  position: absolute;
  top: -4px; left: 0; right: 0;
  border-top: 1px solid var(--ink);
}
.footer .footer-right { text-align: right; }
.footer a { color: var(--ink); border-bottom: 1px solid var(--rule-soft); }
.footer a:hover { border-color: var(--ink); text-decoration: none; }
@media (max-width: 640px) {
  .footer { grid-template-columns: 1fr; }
  .footer .footer-right { text-align: left; }
}

.progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  background: var(--ink);
  width: 0%;
  z-index: 50;
  transition: width 0.06s linear;
}

/* ═════════════════════════════════════════════════════════════
   COMMAND PALETTE (⌘K) — native <dialog>
   ═════════════════════════════════════════════════════════════ */
.cmd {
  border: none;
  padding: 0;
  background: transparent;
  width: min(640px, 92vw);
  max-height: 70vh;
  margin: 10vh auto auto;
  color: var(--ink);
}
.cmd::backdrop {
  background: color-mix(in oklab, var(--ink) 65%, transparent);
  backdrop-filter: blur(6px) saturate(.9);
}
.cmd-shell {
  border: 1px solid var(--ink);
  background: var(--paper);
  box-shadow: 0 24px 80px rgba(0,0,0,.25);
  display: flex;
  flex-direction: column;
  max-height: 70vh;
}
.cmd-input {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--rule-soft);
  outline: 0;
  background: transparent;
  font-family: var(--f-serif);
  font-size: var(--fs-lead);
  color: var(--ink);
  padding: 18px 22px;
}
.cmd-input::placeholder { color: var(--ink-faint); }
.cmd-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 22px;
  border-bottom: 1px solid var(--rule-soft);
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.cmd-results {
  list-style: none;
  margin: 0;
  padding: 6px 0;
  overflow-y: auto;
}
.cmd-results li {
  padding: 10px 22px;
  font-family: var(--f-sans);
  font-size: var(--fs-base);
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 14px;
  align-items: baseline;
  cursor: pointer;
  border-bottom: 1px solid var(--rule-ghost);
}
.cmd-results li:last-child { border-bottom: none; }
.cmd-results li:hover, .cmd-results li[aria-selected="true"] { background: var(--paper-elev); }
.cmd-results .key {
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  letter-spacing: .14em;
  color: var(--ink-mute);
  text-transform: uppercase;
}
.cmd-results .ttl {
  color: var(--ink);
}
.cmd-results .sub {
  font-family: var(--f-mono);
  font-size: var(--fs-nano);
  color: var(--ink-faint);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.cmd-empty {
  padding: 30px 22px;
  font-family: var(--f-serif);
  font-style: italic;
  color: var(--ink-mute);
  text-align: center;
}

/* ═════════════════════════════════════════════════════════════
   VIEW TRANSITIONS — animate page swaps
   ═════════════════════════════════════════════════════════════ */
::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 320ms;
  animation-timing-function: cubic-bezier(.22, .61, .36, 1);
}
::view-transition-old(root) {
  animation-name: vt-fade-out;
}
::view-transition-new(root) {
  animation-name: vt-fade-in;
}
@keyframes vt-fade-out { to { opacity: 0; transform: translateY(-6px); } }
@keyframes vt-fade-in  { from { opacity: 0; transform: translateY(8px); } }

/* Named transitions for the masthead nameplate (cross-document) */
.nameplate { view-transition-name: nameplate; }
.mast      { view-transition-name: mast; }

/* ═════════════════════════════════════════════════════════════
   SCROLL-DRIVEN PROGRESS — pure CSS (Chrome 115+, Safari 18+)
   ═════════════════════════════════════════════════════════════ */
@supports (animation-timeline: scroll()) {
  .progress {
    animation: progress-grow linear;
    animation-timeline: scroll(root);
    transition: none;
  }
  @keyframes progress-grow {
    from { width: 0%; }
    to   { width: 100%; }
  }
}

/* ═════════════════════════════════════════════════════════════
   ENTRANCE ANIMATION — scroll-driven reveal of era headers
   ═════════════════════════════════════════════════════════════ */
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .era-head, .section-head {
      animation: rise linear;
      animation-timeline: view();
      animation-range: entry 0% entry 60%;
    }
    @keyframes rise {
      from { opacity: 0; transform: translateY(20px); }
      to   { opacity: 1; transform: translateY(0); }
    }
  }
}

/* ═════════════════════════════════════════════════════════════
   TYPOGRAPHY POLISH
   ═════════════════════════════════════════════════════════════ */
.headline, .nameplate, .era h2, .section h2 {
  text-wrap: balance;
}
.lede, .era-lead, .section-lead, .body-prose p, .event-desc {
  text-wrap: pretty;
}

/* Selection */
::selection {
  background: var(--ink);
  color: var(--paper);
}

/* Focus rings */
:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}
.btn:focus-visible { outline-offset: 0; background: var(--ink); color: var(--paper); }

/* Container queries on people grid */
@container (max-width: 600px) {
  .person { padding: 16px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── Print ── */
@media print {
  .mast-foot, .section-nav, .progress, .btn, .cmd { display: none; }
  body { background: white; color: black; }
  a { color: black; }
}