/* ============================================================
   Singapore Chinese Historical Network — visual system
   Scholarly archive, parchment + ink, dialect-coded palette
   ============================================================ */

/* ---- minimalist scrollbars (global) ----
   Thin, neutral, theme-aware. Applied via WebKit pseudo-elements and
   the standard `scrollbar-width` property so it works in Firefox too. */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--rule-strong) transparent;
}
*::-webkit-scrollbar { width: 6px; height: 6px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: var(--rule-strong);
  border-radius: 3px;
}
*::-webkit-scrollbar-thumb:hover { background: var(--ink-mute); }
*::-webkit-scrollbar-corner { background: transparent; }

:root {
  /* Parchment theme (default) */
  --bg:        #f1e6cf;
  --bg-card:  #f8efd9;
  --bg-deep:  #e8dab8;
  --ink:      #1c1611;
  --ink-soft: #4a3b2a;
  --ink-mute: #8a755a;
  --rule:     #d4c2a1;
  --rule-strong: #a89070;
  --accent:   #8b2e21;
  --accent-soft: #c14a35;

  /* Dialect palette — warm heritage tones */
  --c-hokkien:  #b8431e; /* 闽 Hokkien (vermillion) */
  --c-teochew:  #2a5f6e; /* 潮 Teochew (sea-teal) */
  --c-canton:   #4f7a3e; /* 粤 Canton (jade) */
  --c-hakka:    #a17320; /* 客 Hakka (saffron) */
  --c-hainan:   #6e3a87; /* 琼 Hainan (violet) */
  --c-samkiang: #2e4070; /* 三江 Sam Kiang (indigo) */
  --c-unknown:  #8a755a; /* warm gray */

  /* Edge classification */
  --e-kin:        #6e3a26; /* direct kin & spouse */
  --e-relative:   #9a7a55; /* general relatives */
  --e-close:      #2a3f5c; /* close partner */
  --e-partner:    #5a6677; /* ordinary partner */
  --e-social:     #b09060; /* light social */

  --font-cjk: 'Noto Serif SC', 'Songti SC', 'STSong', serif;
  --font-serif: 'Cormorant Garamond', 'EB Garamond', Georgia, serif;
  --font-ui: 'Manrope', 'IBM Plex Sans', -apple-system, sans-serif;

  --shadow-sm: 0 1px 0 rgba(28,22,17,0.06), 0 2px 6px rgba(28,22,17,0.04);
  --shadow-md: 0 1px 0 rgba(28,22,17,0.08), 0 8px 28px rgba(28,22,17,0.08);
  --shadow-lg: 0 2px 0 rgba(28,22,17,0.08), 0 20px 60px rgba(28,22,17,0.16);
}

[data-theme="midnight"] {
  --bg:        #16140f;
  --bg-card:  #1d1a13;
  --bg-deep:  #0e0d09;
  --ink:      #f0e7d2;
  --ink-soft: #c4b693;
  --ink-mute: #8a7a5b;
  --rule:     #3a3324;
  --rule-strong: #524729;
  --accent:   #d96b54;
  --accent-soft: #e58a73;

  --c-hokkien:  #e67148;
  --c-teochew:  #6db5c5;
  --c-canton:   #93c674;
  --c-hakka:    #d6a648;
  --c-hainan:   #b88dd2;
  --c-samkiang: #7894c8;
  --c-unknown:  #a89373;

  --e-kin:        #c39378;
  --e-relative:   #b39872;
  --e-close:      #8aa0bd;
  --e-partner:    #7d8898;
  --e-social:     #c7ac80;
}

/* ---- base ---- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; overflow: hidden; }
body {
  font-family: var(--font-ui);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: 'kern', 'liga', 'calt';
}

/* Subtle paper grain — radial + tiny noise via stacked gradients */
body::before {
  content: '';
  position: fixed; inset: 0;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(255,250,235,0.7), transparent 60%),
    radial-gradient(ellipse at 100% 100%, rgba(150,110,60,0.08), transparent 60%);
  pointer-events: none;
  z-index: 0;
}
[data-theme="midnight"] body::before {
  background:
    radial-gradient(ellipse at 20% 0%, rgba(80,68,40,0.35), transparent 60%),
    radial-gradient(ellipse at 100% 100%, rgba(217,107,84,0.06), transparent 60%);
}

#root { position: relative; height: 100vh; width: 100vw; z-index: 1; }

/* ---- top chrome ---- */
.chrome {
  position: absolute;
  top: 0; left: 0; right: 380px;        /* stop before the right rail */
  z-index: 6;                            /* below rail's z:5? no — chrome needs to be on top of canvas but below rail. Let's set rail higher. */
  padding: 18px 24px 14px;
  display: flex; align-items: flex-start; gap: 28px;
  pointer-events: none;
}
.chrome > * { pointer-events: auto; }
/* The title block exists purely for legibility — clicks should pass through to the graph beneath. */
.title-block { pointer-events: none !important; }
.title-block .meta b { pointer-events: auto; }
.search-wrap { pointer-events: none !important; }
.search { pointer-events: auto; }

.title-block {
  flex: 0 0 auto;
  /* Wider so the single-line CJK title (9 characters) doesn't wrap */
  max-width: none;
  padding: 4px 16px 8px 0;
  position: relative;
}
.title-block::before {
  content: '';
  position: absolute;
  inset: -18px -32px -12px -28px;
  background: radial-gradient(ellipse at top left, var(--bg) 0%, var(--bg) 40%, rgba(241,230,207,0) 90%);
  pointer-events: none;
  z-index: -1;
}
.title-block .eyebrow {
  font-family: var(--font-ui);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 6px;
  display: flex; align-items: center; gap: 8px;
}
.title-block .eyebrow::before {
  content: '';
  width: 18px; height: 1px; background: var(--rule-strong);
}
.title-block h1 {
  font-family: var(--font-cjk);
  font-weight: 600;
  font-size: 42px;
  line-height: 1.08;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.title-block .latin {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 17px;
  color: var(--ink-soft);
  line-height: 1.2;
}
.title-block .meta {
  margin-top: 10px;
  font-size: 11.5px;
  color: var(--ink-mute);
  display: flex; gap: 12px; flex-wrap: wrap;
  font-variant-numeric: tabular-nums;
}
.title-block .meta b {
  font-weight: 600; color: var(--ink-soft);
}

/* search wrap also gets a soft halo to peel from graph */
.search-wrap {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  padding-top: 2px;
  position: relative;
}
.search-wrap::before {
  content: '';
  position: absolute;
  inset: -16px -40px -16px -40px;
  background: radial-gradient(ellipse at center, var(--bg) 0%, var(--bg) 30%, rgba(241,230,207,0) 90%);
  pointer-events: none;
  z-index: -1;
}
.search {
  width: 100%;
  max-width: 460px;
  position: relative;
}
.search input {
  width: 100%;
  font: 400 14px/1.4 var(--font-ui);
  color: var(--ink);
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 10px 14px 10px 38px;
  outline: none;
  box-shadow: var(--shadow-sm);
  transition: border-color .15s, box-shadow .15s;
}
.search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(139,46,33,0.12);
}
.search .icon {
  position: absolute;
  left: 13px; top: 50%; transform: translateY(-50%);
  color: var(--ink-mute);
  pointer-events: none;
}
.search input::placeholder { color: var(--ink-mute); }

.search-results {
  position: absolute;
  top: calc(100% + 6px); left: 0; right: 0;
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: 2px;
  box-shadow: var(--shadow-md);
  max-height: 320px; overflow-y: auto;
  z-index: 50;
}
/* When the search lives inside the bottom-left legend-stack, the dropdown
   would otherwise extend off the bottom edge of the viewport. Flip it
   upward so the entire results panel appears ABOVE the input. */
.legend-stack .search-results {
  top: auto;
  bottom: calc(100% + 6px);
  box-shadow: 0 -6px 18px rgba(0,0,0,0.18);
}
.search-result {
  display: grid;
  grid-template-columns: 8px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  cursor: pointer;
  border-bottom: 1px solid rgba(0,0,0,0.04);
}
.search-result:last-child { border-bottom: none; }
.search-result:hover, .search-result.active {
  background: var(--bg-deep);
}
.search-result .dialect-dot {
  width: 8px; height: 8px; border-radius: 50%;
}
.search-result .names {
  display: flex; flex-direction: column; gap: 1px; min-width: 0;
}
.search-result .zh {
  font-family: var(--font-cjk);
  font-size: 14px;
  font-weight: 500;
}
.search-result .en {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 12px;
  color: var(--ink-soft);
}
.search-result .years {
  font-family: var(--font-ui);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  color: var(--ink-mute);
  white-space: nowrap;
}

/* right rail — biography */
.rail {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 380px;
  background: var(--bg-card);
  border-left: 1px solid var(--rule);
  z-index: 8;                            /* above .chrome (6) so it never gets overlapped */
  display: flex; flex-direction: column;
  box-shadow: var(--shadow-md);
}
/* When no figure is selected, the rail is still visible (showing a quiet
   placeholder), so users see the affordance the moment they land. */
.rail.empty .rail-header h2 { opacity: 0.18; }
.rail.empty .rail-header .seal { color: var(--ink-mute); }

.rail-header {
  /* Top padding has to clear the absolutely-positioned .rail-nav (back +
     close buttons sit at top:12px with ~28px height = bottom edge at 40px).
     Add an extra 12px of breathing room so content never touches them. */
  padding: 52px 22px 16px;
  border-bottom: 1px solid var(--rule);
  position: relative;
}
.rail-nav {
  position: absolute;
  top: 12px; right: 12px; left: 12px;
  display: flex; align-items: center;
  pointer-events: none;
}
.rail-nav > * { pointer-events: auto; }
.rail-back, .rail-close {
  background: transparent;
  border: 1px solid transparent;
  color: var(--ink-mute);
  border-radius: 999px;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
  display: inline-flex; align-items: center; gap: 6px;
  font: 500 11px/1 var(--font-ui);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.rail-back {
  padding: 6px 10px 6px 8px;
}
.rail-back:hover {
  background: var(--bg-deep);
  color: var(--ink);
  border-color: var(--rule);
}
.rail-close {
  margin-left: auto;
  width: 28px; height: 28px;
  display: grid; place-items: center;
  padding: 0;
}
.rail-close:hover { background: var(--bg-deep); color: var(--ink); }

.bio-headline {
  display: grid;
  grid-template-columns: 68px 1fr;
  gap: 14px;
  align-items: center;
  margin-top: 2px;
}
.bio-titles { min-width: 0; }
.bio-titles h2 {
  font-family: var(--font-cjk);
  font-weight: 600;
  font-size: 28px;
  margin: 0;
  letter-spacing: 0.04em;
  line-height: 1.05;
}
.bio-titles .en-name {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 17px;
  color: var(--ink-soft);
  margin-top: 4px;
  line-height: 1.2;
}
.bio-titles .pinyin {
  font-family: var(--font-ui);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: 4px;
}

.name-seal {
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.18),
    inset 0 -1px 0 rgba(0,0,0,0.15),
    0 1px 0 rgba(28,22,17,0.06);
  flex-shrink: 0;
  display: grid; place-items: center;
}
.name-seal::after {
  /* subtle seal-style inner border */
  content: '';
  position: absolute; inset: 4px;
  border: 1px solid rgba(255,248,232,0.25);
  border-radius: 2px;
  pointer-events: none;
}

.rail-header .seal {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-ui);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 10px;
}
.rail-header .seal .dot {
  width: 7px; height: 7px; border-radius: 50%;
}
.rail-header h2 {
  font-family: var(--font-cjk);
  font-weight: 600;
  font-size: 32px;
  margin: 0;
  letter-spacing: 0.04em;
  line-height: 1.1;
}
.rail-header .en-name {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 19px;
  color: var(--ink-soft);
  margin-top: 4px;
  line-height: 1.25;
}
.rail-header .pinyin {
  font-family: var(--font-ui);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: 4px;
}
.rail-header .years {
  margin-top: 14px;
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}
.rail-header .years .sep {
  margin: 0 8px;
  color: var(--ink-mute);
}

.rail-body { overflow-y: auto; flex: 1; padding: 20px 22px 28px; }

.field {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 10px 14px;
  padding: 9px 0;
  border-bottom: 1px dotted var(--rule);
  align-items: baseline;
}
.field:last-child { border-bottom: none; }
.field .label {
  font-family: var(--font-ui);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.field .value {
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--ink);
  line-height: 1.4;
}
.field .value .zh { font-family: var(--font-cjk); font-size: 14px; }
.field .value .en { font-style: italic; color: var(--ink-soft); }
.field .value a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}
.field .value a:hover { color: var(--accent-soft); }

.section-head {
  margin: 22px 0 8px;
  font-family: var(--font-ui);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: flex; align-items: center; gap: 10px;
}
.section-head::after {
  content: ''; flex: 1; height: 1px; background: var(--rule);
}
.section-head .count {
  background: var(--bg-deep);
  color: var(--ink-soft);
  padding: 1px 7px;
  border-radius: 2px;
  font-size: 10px;
  letter-spacing: 0.08em;
}

.connections { display: flex; flex-direction: column; gap: 1px; }
.connection {
  display: grid;
  grid-template-columns: 36px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 9px 6px 9px 4px;
  cursor: pointer;
  border-bottom: 1px dotted var(--rule);
  transition: background .12s;
}
.connection:hover { background: var(--bg-deep); }
.connection .info { min-width: 0; }
.connection .info .name {
  font-family: var(--font-cjk);
  font-size: 14px; font-weight: 500;
  display: flex; align-items: baseline; gap: 6px;
  flex-wrap: wrap;
}
.connection .info .name .en {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 12px;
  font-weight: 400;
  color: var(--ink-soft);
}
.connection .info .rel {
  font-family: var(--font-serif);
  font-size: 12.5px;
  color: var(--ink-soft);
  margin-top: 2px;
  font-style: italic;
}
.connection .info .remark {
  font-family: var(--font-ui);
  font-size: 11px;
  color: var(--ink-mute);
  margin-top: 3px;
  line-height: 1.4;
}
.connection .chev {
  color: var(--ink-mute);
  opacity: 0.5;
}
.connection:hover .chev { opacity: 1; color: var(--accent); }

/* featured biographies list (in empty rail) */
.featured-list { display: flex; flex-direction: column; gap: 1px; }
.featured-item {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 10px 6px 10px 4px;
  cursor: pointer;
  border-bottom: 1px dotted var(--rule);
  transition: background .12s;
}
.featured-item:hover { background: var(--bg-deep); }
.featured-item .info { min-width: 0; }
.featured-item .info .name {
  display: flex; align-items: baseline; gap: 6px; flex-wrap: wrap;
}
.featured-item .info .name .zh {
  font-family: var(--font-cjk);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.featured-item .info .name .en {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 13px;
  color: var(--ink-soft);
}
.featured-item .info .meta {
  font-family: var(--font-ui);
  font-size: 11px;
  color: var(--ink-mute);
  letter-spacing: 0.02em;
  margin-top: 3px;
}
.featured-item .chev {
  color: var(--ink-mute);
  opacity: 0.5;
}
.featured-item:hover .chev { opacity: 1; color: var(--accent); }

.refs { display: flex; flex-direction: column; gap: 8px; margin-top: 6px; }

/* ---- China map (ancestral home) ---- */
.china-map {
  margin-top: 20px;
  padding: 14px 14px 12px;
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: 2px;
  box-shadow: inset 0 0 0 1px rgba(28,22,17,0.02);
}
.china-map-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.china-map-title {
  font-family: var(--font-ui);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.china-map-tabs {
  display: inline-flex;
  background: var(--bg-deep);
  border: 1px solid var(--rule);
  border-radius: 2px;
  overflow: hidden;
}
.china-map-tabs .tab {
  font: 500 10px var(--font-ui);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 9px 3px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--ink-mute);
  transition: background .12s, color .12s;
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
}
.china-map-tabs .tab + .tab { border-left: 1px solid var(--rule); }
.china-map-tabs .tab .yr {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 9.5px;
  letter-spacing: 0;
  opacity: 0.75;
  text-transform: none;
}
.china-map-tabs .tab.active {
  background: var(--ink);
  color: var(--bg-card);
}
.china-map-tabs .tab:hover:not(.active) {
  color: var(--ink);
  background: rgba(0,0,0,0.04);
}

.china-map-svg {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 2px;
  background: var(--bg-deep);
  border: 1px solid var(--rule);
}
.china-map { position: relative; }
.china-map-svg-wrap { position: relative; }
.china-map-expand {
  position: absolute;
  bottom: 8px;             /* anchored to the SVG's bottom-right */
  right: 8px;
  width: 28px; height: 28px;
  border-radius: 2px;
  background: var(--bg-card);
  border: 1px solid var(--rule);
  color: var(--ink-soft);
  cursor: pointer;
  display: grid; place-items: center;
  box-shadow: 0 1px 0 rgba(28,22,17,0.06);
  transition: background .12s, color .12s, transform .12s;
}
.china-map-expand:hover {
  background: var(--ink);
  color: var(--bg-card);
  transform: scale(1.06);
}

/* ---- World diaspora modal ---- */
.world-modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(20, 14, 6, 0.65);
  backdrop-filter: blur(3px);
  z-index: 100;
  display: grid; place-items: center;
  animation: wm-fade .18s ease;
}
@keyframes wm-fade { from { opacity: 0; } }
.world-modal {
  width: min(95vw, 1400px);
  height: min(90vh, 880px);
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: 3px;
  box-shadow: var(--shadow-lg);
  display: flex; flex-direction: column;
  overflow: hidden;
  position: relative;
}
.world-modal header {
  padding: 18px 22px;
  border-bottom: 1px solid var(--rule);
  display: flex; align-items: flex-start; justify-content: space-between; gap: 24px;
  flex-shrink: 0;
}
.world-modal header .eyebrow {
  font-family: var(--font-ui);
  font-size: 10.5px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 4px;
}
.world-modal header h2 {
  font-family: var(--font-cjk);
  font-weight: 600; font-size: 22px;
  margin: 0; color: var(--ink);
}
.world-modal header .latin {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.2;
  margin-top: 4px;
}
.world-modal header .meta {
  margin-top: 6px;
  font-family: var(--font-serif); font-style: italic;
  font-size: 13px; color: var(--ink-soft);
}
.world-modal .modal-controls {
  display: flex; align-items: center; gap: 14px;
}
.world-modal .modal-close {
  width: 32px; height: 32px;
  background: transparent; border: 1px solid var(--rule);
  border-radius: 0; color: var(--ink-mute); cursor: pointer;
  display: grid; place-items: center;
  transition: background .12s, color .12s, border-color .12s;
}
.world-modal .modal-close:hover {
  background: var(--ink); color: var(--bg-card); border-color: var(--ink);
}
.world-map-host {
  flex: 1 1 0;
  min-height: 0;
  position: relative;
  background: #2a3a52;
  overflow: hidden;
}
.world-modal-map {
  display: block;
  width: 100%; height: 100%;
  background: #2a3a52;
  cursor: grab;
}
.world-modal-map:active { cursor: grabbing; }
/* Mode switcher + description, anchored top-left INSIDE the map host
   (overlays the world) and integrated as a single panel. */
.world-mode-panel {
  position: absolute;
  top: 16px; left: 16px;
  width: 360px;
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  border-radius: 2px;
  box-shadow: var(--shadow-md);
  z-index: 2;
}
.world-mode-panel .china-map-tabs {
  display: flex;
  border-bottom: 1px solid var(--rule);
}
.world-mode-panel .china-map-tabs .tab {
  flex: 1;
  background: transparent;
  border: 0;
  padding: 9px 12px;
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s, background .15s;
}
.world-mode-panel .china-map-tabs .tab:hover { color: var(--ink); }
.world-mode-panel .china-map-tabs .tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: var(--bg);
}
.world-mode-panel .china-map-tabs .tab .yr {
  font-size: 10px;
  margin-left: 4px;
  color: var(--ink-mute);
  letter-spacing: 0.14em;
}
.world-mode-note {
  padding: 12px 14px 14px;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ink-soft);
  max-height: 280px;
  overflow-y: auto;
}
/* Heading label — the standalone <b> directly inside .world-mode-note that
   names the regime (e.g. "ROC, 1911 · 中華民國"). Styled as a small caps
   eyebrow, set on its own line. */
.world-mode-note > b {
  display: block;
  font-style: normal;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 2px;
}
.world-mode-note p {
  margin: 6px 0 0;
  font-family: inherit;
  font-style: inherit;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ink-soft);
}
/* Inline emphasis inside the description paragraph — must blend with the
   surrounding italic serif body, not look like a sans-serif eyebrow. */
.world-mode-note p b {
  font-family: inherit;
  font-style: inherit;
  font-weight: 700;
  font-size: inherit;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink);
  margin: 0;
}
.world-modal .home-dots circle { transition: r .12s; }
.world-modal .home-dots g:hover circle:first-child { r: 18; }
/* Migration arcs are solid; the flow animation lives on the SVG
   linearGradient (gradientTransform translate) so each arc shows the
   colour wave moving from origin → birthplace. */
.world-tip {
  position: absolute;
  bottom: 24px; left: 24px;
  max-width: 360px;
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: 2px;
  box-shadow: var(--shadow-md);
  padding: 12px 16px 14px;
  font-family: var(--font-ui);
}
.world-tip .place {
  display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap;
}
.world-tip .place .zh { font-family: var(--font-cjk); font-size: 18px; font-weight: 500; color: var(--ink); }
.world-tip .place .en { font-family: var(--font-serif); font-style: italic; font-size: 14px; color: var(--ink-soft); }
.world-tip .count {
  font-size: 10.5px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); margin-top: 4px;
}
.world-tip .samples {
  margin-top: 8px;
  display: flex; flex-wrap: wrap; gap: 4px 10px;
  font-family: var(--font-cjk); font-size: 13px;
  color: var(--ink-soft);
}
.world-tip .samples .samp { white-space: nowrap; }
.world-tip .samples .more { font-style: italic; font-family: var(--font-serif); color: var(--ink-mute); font-size: 12px; }

.china-map-caption {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.china-map-caption .loc-line {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 4px;
}
.china-map-caption .era {
  font-family: var(--font-ui);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.china-map-caption .loc-name {
  display: flex;
  align-items: baseline;
  gap: 6px;
  flex-wrap: wrap;
}
.china-map-caption .loc-name .zh {
  font-family: var(--font-cjk);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
}
.china-map-caption .loc-name .en {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 13px;
  color: var(--ink-soft);
}
.china-map-caption .province .loc-name .zh { font-size: 12.5px; font-weight: 400; }
.china-map-caption .province .loc-name .en { font-size: 12px; }
.china-map-caption .outside-label {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 12.5px;
  color: var(--ink-mute);
  line-height: 1.4;
  display: flex; flex-direction: column;
}
.china-map-caption .outside-label .loc-detail {
  font-style: normal;
  color: var(--ink-soft);
  font-size: 13px;
  font-family: var(--font-cjk);
  margin-top: 2px;
}
.china-map-caption .boundary-note {
  margin-top: 6px;
  padding: 7px 10px;
  background: rgba(139,46,33,0.06);
  border-left: 2px solid var(--accent);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 12px;
  color: var(--ink-soft);
  line-height: 1.4;
  border-radius: 0 2px 2px 0;
}

/* ---- Photo portraits for featured biographies + bio header ---- */
.photo-portrait {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  background: var(--bg-deep);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.18),
    inset 0 -1px 0 rgba(0,0,0,0.15),
    0 1px 0 rgba(28,22,17,0.06);
  flex-shrink: 0;
  display: grid; place-items: center;
}
.photo-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 22%; /* faces are usually in top third for historical portraits */
  display: block;
}
.photo-portrait::after {
  content: '';
  position: absolute; inset: 0;
  pointer-events: none;
  border: 1px solid rgba(28,22,17,0.16);
  border-radius: 4px;
  box-shadow: inset 0 0 0 1px rgba(248,239,217,0.18);
}
.photo-portrait .dialect-band {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 3px;
  z-index: 2;
}
.ref {
  padding: 10px 12px;
  background: var(--bg-deep);
  border-left: 2px solid var(--accent);
  border-radius: 2px;
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.4;
  color: var(--ink-soft);
}
.ref a { color: var(--accent); text-decoration: none; border-bottom: 1px solid currentColor; word-break: break-word; }
.ref a:hover { color: var(--accent-soft); }
.ref .index { font-size: 12px; color: var(--ink-mute); margin-top: 4px; }

/* ---- bottom-left: search + legend stack ----
   Anchored at the BOTTOM so the legend grows upward and the search bar
   stays pinned at the bottom edge regardless of legend expand/collapse. */
.legend-stack {
  position: absolute;
  bottom: 24px;
  left: 24px;
  z-index: 5;
  width: 260px;
  display: flex; flex-direction: column-reverse; gap: 10px;
  pointer-events: none;
}
.legend-stack > * { pointer-events: auto; }
.legend-stack .search { width: 100%; max-width: none; }

.legend {
  width: 100%;
  max-height: calc(100vh - 240px);
  overflow-y: auto;
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: 2px;
  box-shadow: var(--shadow-md);
  padding: 14px 16px 16px;
  font-family: var(--font-ui);
}
.legend.collapsed .legend-body { display: none; }
/* Settings (theme + focused-only) rows inside the legend */
.legend .legend-setting {
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px;
  margin-top: 8px;
  font-size: 12px;
  color: var(--ink-soft);
}
.legend .legend-setting.toggle-row {
  cursor: pointer;
  user-select: none;
}
.legend .legend-setting .seg {
  display: inline-flex;
  border: 1px solid var(--rule);
  border-radius: 2px;
  overflow: hidden;
}
.legend .legend-setting .seg-btn {
  background: transparent;
  border: 0;
  padding: 4px 8px;
  font-family: var(--font-ui);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  cursor: pointer;
}
.legend .legend-setting .seg-btn:hover { color: var(--ink); }
.legend .legend-setting .seg-btn.active {
  background: var(--ink);
  color: var(--bg-card);
}
.legend .legend-setting .switch {
  width: 26px; height: 14px;
  background: var(--rule);
  border-radius: 8px;
  position: relative;
  transition: background .15s;
  flex-shrink: 0;
}
.legend .legend-setting .switch.on { background: var(--accent); }
.legend .legend-setting .switch .thumb {
  position: absolute;
  top: 2px; left: 2px;
  width: 10px; height: 10px;
  background: var(--bg-card);
  border-radius: 50%;
  transition: left .15s;
}
.legend .legend-setting .switch.on .thumb { left: 14px; }
/* Non-China ancestral home list */
.legend .non-china-list {
  display: flex; flex-direction: column;
  gap: 2px;
  margin-top: 4px;
  max-height: 220px;
  overflow-y: auto;
}
.legend .non-china-btn {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 8px;
  padding: 4px 6px;
  background: transparent;
  border: 0;
  border-radius: 2px;
  font-family: var(--font-ui);
  text-align: left;
  cursor: pointer;
  color: var(--ink-soft);
  transition: background .12s, color .12s;
}
.legend .non-china-btn:hover { background: var(--bg-deep); color: var(--ink); }
.legend .non-china-btn .zh {
  font-family: var(--font-cjk);
  font-size: 12.5px;
  color: var(--ink);
}
.legend .non-china-btn .origin {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 11px;
  color: var(--ink-mute);
}
.legend .legend-title {
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: flex; align-items: center; justify-content: space-between;
  cursor: pointer;
  user-select: none;
}
.legend .toggle {
  color: var(--ink-mute);
  font-size: 10px;
}
.legend .legend-section { margin-top: 12px; }
.legend .legend-section-title {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 6px;
}
.legend .item {
  display: grid;
  grid-template-columns: 14px 1fr auto;
  gap: 9px;
  align-items: center;
  padding: 4px 0;
  font-size: 12px;
  cursor: pointer;
  color: var(--ink-soft);
}
.legend .item:hover { color: var(--ink); }
.legend .item.muted { opacity: 0.35; }
.legend .item .dot { width: 10px; height: 10px; border-radius: 50%; }
.legend .item .label .zh { font-family: var(--font-cjk); font-size: 13px; color: var(--ink); margin-right: 4px; }
.legend .item .label .en { font-style: italic; font-family: var(--font-serif); color: var(--ink-soft); }
.legend .item .count {
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  color: var(--ink-mute);
}

.legend .edge-item {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 9px;
  align-items: center;
  padding: 4px 0;
  font-size: 12px;
  color: var(--ink-soft);
}
.legend .edge-item .swatch {
  height: 2px; background: currentColor; border-radius: 1px;
}
.legend .edge-item.dotted .swatch {
  background: repeating-linear-gradient(90deg, currentColor 0 3px, transparent 3px 6px);
  height: 2px;
}
.legend .help {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dotted var(--rule);
  font-size: 11px;
  color: var(--ink-mute);
  line-height: 1.5;
}
.legend .help kbd {
  font-family: var(--font-ui);
  font-size: 10px;
  background: var(--bg-deep);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 1px 5px;
  color: var(--ink-soft);
}

/* ---- canvas + overlay ---- */
.stage {
  position: absolute;
  top: 0; left: 0;
  right: 380px;
  bottom: 0;
  z-index: 1;
}
.stage.full { right: 0; }
.stage canvas { position: absolute; inset: 0; cursor: grab; }
.stage canvas.dragging { cursor: grabbing; }
.stage .labels {
  position: absolute; inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.stage .label {
  position: absolute;
  font-family: var(--font-cjk);
  font-size: 12.5px;
  color: var(--ink);
  background: rgba(241,230,207,0.85);
  padding: 1px 5px;
  border-radius: 2px;
  white-space: nowrap;
  transform: translate(-50%, -50%);
  letter-spacing: 0.02em;
  pointer-events: none;
  font-weight: 500;
}
[data-theme="midnight"] .stage .label { background: rgba(22,20,15,0.78); }
.stage .label.hover, .stage .label.selected {
  font-size: 13px;
  background: var(--ink);
  color: var(--bg-card);
  padding: 2px 7px;
  font-weight: 500;
  z-index: 5;
}
.stage .label .en {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 11px;
  margin-left: 5px;
  opacity: 0.75;
}
.stage .label.selected .en { opacity: 0.9; }

/* tooltip */
.tooltip {
  position: absolute;
  z-index: 20;
  pointer-events: none;
  background: var(--ink);
  color: var(--bg);
  padding: 8px 12px;
  border-radius: 3px;
  font-size: 12px;
  line-height: 1.35;
  box-shadow: var(--shadow-md);
  transform: translate(-50%, calc(-100% - 12px));
  white-space: nowrap;
  font-family: var(--font-ui);
}
.tooltip::after {
  content: '';
  position: absolute;
  top: 100%; left: 50%; transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--ink);
}
.tooltip .zh { font-family: var(--font-cjk); font-size: 14px; font-weight: 500; }
.tooltip .en { font-family: var(--font-serif); font-style: italic; font-size: 12px; opacity: 0.85; margin-left: 6px; }
.tooltip .meta { font-size: 11px; opacity: 0.7; margin-top: 2px; font-variant-numeric: tabular-nums; }

/* zoom controls */
.zoom-ctl {
  position: absolute;
  right: 396px; /* sits to the left of the rail */
  bottom: 24px;
  z-index: 5;
  display: flex; flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: 2px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.stage.full + .zoom-ctl, .zoom-ctl.full { right: 24px; }
.zoom-ctl button {
  width: 34px; height: 34px;
  border: none; background: transparent;
  display: grid; place-items: center;
  color: var(--ink-soft);
  cursor: pointer;
  font: 16px/1 var(--font-ui);
}
.zoom-ctl button:hover { background: var(--bg-deep); color: var(--ink); }
.zoom-ctl button + button { border-top: 1px solid var(--rule); }

/* highlights state */
.stage[data-highlight="true"] .label:not(.in-focus) { opacity: 0.2; }

/* placeholder for empty state */
.placeholder {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: var(--ink-mute);
  font-family: var(--font-serif);
  font-style: italic;
  pointer-events: none;
}

/* fade-in once data loads */
.loading {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  z-index: 100;
  background: var(--bg);
  opacity: 0;
  animation: fade-in 0.4s 0.6s forwards;
  transition: opacity .4s;
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--ink-mute);
}
@keyframes fade-in { to { opacity: 1; } }
.loading.gone { opacity: 0; pointer-events: none; visibility: hidden; }

/* small screen warning */
@media (max-width: 900px) {
  .rail { width: 320px; }
  .stage { right: 320px; }
  .zoom-ctl { right: 336px; }
  .title-block { max-width: none; }
  .title-block h1 { font-size: 30px; }
}

/* scrollbar */
.rail-body::-webkit-scrollbar, .search-results::-webkit-scrollbar { width: 8px; }
.rail-body::-webkit-scrollbar-thumb, .search-results::-webkit-scrollbar-thumb {
  background: var(--rule); border-radius: 4px;
}
.rail-body::-webkit-scrollbar-track, .search-results::-webkit-scrollbar-track { background: transparent; }