/* China License Plates — NYT Pudding–style visualization */

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --ink: #1a1a1a;
  --ink-soft: #444;
  --ink-mute: #888;
  --rule: #e5e5e5;
  --rule-strong: #cfcfcf;
  --paper: #fbfaf7;
  --paper-warm: #f4f1ea;
  --accent: #c8102e;        /* red */
  --plate-blue: #1e4fa3;
  --serif: 'Tiempos Headline', 'Source Serif 4', 'Source Serif Pro', 'Times New Roman', Georgia, serif;
  --sans: 'Söhne', 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, monospace;
  --hanzi: 'Noto Serif SC', 'Source Han Serif SC', serif;
  --plate-hanzi: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --plate-font: 'Saira Condensed', 'Inter', sans-serif;}

html, body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }

/* ---------- Layout ---------- */
.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 32px 120px;
}

.kicker {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 600;
}

.byline {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  margin-top: 14px;
}
.byline strong { color: var(--ink); font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; font-size: 11px; }

/* ---------- Masthead ---------- */
.masthead {
  padding: 88px 0 56px;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  max-width: 880px;
}
.masthead .kicker { margin-bottom: 28px; }
.masthead h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(44px, 6.5vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.025em;
}
.masthead h1 .accent { color: var(--accent); font-style: italic; font-weight: 600; }
.masthead .standfirst {
  margin-top: 28px;
  font-family: var(--serif);
  font-size: clamp(18px, 1.4vw, 22px);
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: 640px;
  font-weight: 400;
}

/* ---------- Sections ---------- */
section {
  padding: 96px 0 32px;
  border-bottom: 1px solid var(--rule);
}
section:last-of-type { border-bottom: none; }

.sec-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-mute);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.sec-head {
  font-family: var(--serif);
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 700;
  max-width: 720px;
  margin-bottom: 18px;
}
.sec-dek {
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 640px;
  margin-bottom: 56px;
}

/* ---------- Hero plate ---------- */
.hero-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 0 24px;
}

.plate {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  border: 3px solid rgba(255,255,255,0.92);
  box-shadow:
    inset 0 0 0 4px rgba(0,0,0,0.08),
    0 30px 60px -20px rgba(0,0,0,0.35),
    0 8px 16px -8px rgba(0,0,0,0.2);
  font-family: var(--plate-font);
  font-weight: 500;
  user-select: none;
  transition: background 600ms ease, color 600ms ease;
  overflow: hidden;
}

.plate.size-hero {
  width: min(880px, 92vw);
  height: min(280px, calc(92vw * 0.318));
  font-size: clamp(70px, 14vw, 142px);
  --slot-w: clamp(72px, 10vw, 100px);
  gap: clamp(2px, 0.4vw, 6px);
  padding: 0 clamp(18px, 3vw, 36px);
  letter-spacing: -0.02em;
  border-radius: 17px;
}

.plate.size-md {
  width: 460px;
  height: 122px;
  font-size: 58px;
  --slot-w: 50px;
  gap: 6px;
  padding: 0 16px;
  letter-spacing: 0.01em;
}
.plate.size-md.has-8 {
  font-size: 50px;
  --slot-w: 42px;
  gap: 5px;
  padding: 0 12px;
  letter-spacing: 0.02em;
}

.plate-char {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  line-height: 1;
  width: var(--slot-w);
  flex: 0 0 var(--slot-w);
  text-align: center;
  font-weight: 500;
}
.plate-char.hanzi {
  font-family: var(--plate-hanzi);
  font-weight: 500;
  letter-spacing: -0.02em;
  font-size: 0.82em;
  transform: translateY(-0.04em);
}
.plate-char.dot {
  font-size: 0.55em;
  width: calc(var(--slot-w) * 0.4);
  flex-basis: calc(var(--slot-w) * 0.4);
  transform: translateY(-0.1em);
  opacity: 0.95;
}

/* Bolts on the plate */
.plate::before, .plate::after {
  content: '';
  position: absolute;
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(0,0,0,0.18);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.25);
  top: 14px;
}
.plate.size-hero::before, .plate.size-hero::after {
  width: 20px; height: 20px;
  top: 22px;
}
.plate.bolts-light::before, .plate.bolts-light::after {
  background: rgba(255,255,255,0.35);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.5);
}
.plate::before { left: 50%; transform: translateX(-220%); }
.plate::after  { left: 50%; transform: translateX(220%); }

/* ---------- Scientific diagram annotations (straight lines, no boxes) ---------- */
.diagram {
  position: relative;
  width: min(880px, 92vw);
  margin: 0 auto;
  padding: 60px 0 120px;
}
.diagram .plate {
  position: relative;
  z-index: 2;
}
.diagram-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 3;
  overflow: visible;
}
.annot-line {
  stroke: #9a9a9a;
  stroke-width: 1.4;
  fill: none;
  stroke-dasharray: 800;
  stroke-dashoffset: 800;
  transition: stroke-dashoffset 1100ms cubic-bezier(.4,.0,.2,1);
}
.annot-dot {
  fill: #9a9a9a;
  opacity: 0;
  transform: scale(0);
  transform-origin: center;
  transform-box: fill-box;
  transition: opacity 400ms ease, transform 500ms cubic-bezier(.34,1.56,.64,1);
}
.diagram.in-view .annot-line { stroke-dashoffset: 0; }
.diagram.in-view .annot-dot { opacity: 1; transform: scale(1); }

.annot-label {
  position: absolute;
  font-family: var(--sans);
  font-size: 12px;
  line-height: 1.4;
  color: var(--ink-soft);
  width: 160px;
  z-index: 4;
  opacity: 0;
  transform: translateX(-50%) translateY(6px);
  transition: opacity 600ms ease, transform 600ms ease;
}
.diagram.in-view .annot-label { opacity: 1; transform: translateX(-50%) translateY(0); }

.annot-label .lbl {
  display: block;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
  letter-spacing: -0.005em;
  margin-bottom: 2px;
}
.annot-label .cn {
  font-family: var(--hanzi);
  font-size: 12px;
  color: var(--ink-mute);
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease, transform 700ms ease;
}
.reveal.in-view { opacity: 1; transform: translateY(0); }
.reveal.delay-1 { transition-delay: 100ms; }
.reveal.delay-2 { transition-delay: 200ms; }
.reveal.delay-3 { transition-delay: 300ms; }

/* ---------- Province ticker ---------- */
.ticker {
  margin: 56px auto 0;
  width: min(1040px, 96vw);
  text-align: center;
}
.ticker-label {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 18px;
}
.ticker-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  max-width: 1016px;
  margin: 0 auto;
}
.ticker-cell {
  flex: 0 0 56px;
  width: 56px;
  aspect-ratio: 1 / 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  font-family: var(--hanzi);
  font-size: 22px;
  font-weight: 600;
  background: #fff;
  border: 1px solid var(--rule);
  cursor: pointer;
  transition: all 200ms ease;
  color: var(--ink);
}
.ticker-cell .tc-char {
  font-family: var(--hanzi);
  font-size: 22px;
  font-weight: 600;
  line-height: 1;
}
.ticker-cell .tc-pinyin {
  font-family: var(--serif);
  font-style: italic;
  font-size: 10px;
  font-weight: 500;
  color: var(--ink-mute);
  line-height: 1;
}
.ticker-cell.active .tc-pinyin,
.ticker-cell:hover .tc-pinyin {
  color: rgba(255,255,255,0.85);
}
.ticker-cell {
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--hanzi);
  font-size: 22px;
  font-weight: 600;
  background: #fff;
  border: 1px solid var(--rule);
  cursor: pointer;
  transition: all 200ms ease;
  color: var(--ink);
}
.ticker-cell:hover {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
  transform: translateY(-2px);
}
.ticker-cell.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ---------- Map ---------- */
.map-wrap {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 56px;
  align-items: start;
  margin-top: 24px;
}

@media (max-width: 900px) {
  .map-wrap { grid-template-columns: 1fr; }
}

.map-svg {
  width: 100%;
  height: auto;
  display: block;
  background: var(--paper);
  border: 1px solid var(--rule);
}

.map-province {
  fill: #ffffff;
  stroke: #b8b1a3;
  stroke-width: 0.5;
  stroke-linejoin: round;
  cursor: pointer;
  transition: fill 180ms ease;
}
.map-province:hover, .map-province.active {
  fill: var(--accent);
  stroke: var(--accent);
}
.map-label {
  font-family: var(--hanzi);
  font-size: 13px;
  font-weight: 700;
  fill: var(--ink);
  pointer-events: none;
  text-anchor: middle;
  dominant-baseline: middle;
  paint-order: stroke;
  stroke: #fff;
  stroke-width: 2.5px;
  stroke-linejoin: round;
}
.map-label.on-active { fill: #fff; stroke: var(--accent); }

.map-pinyin {
  font-family: var(--serif);
  font-style: italic;
  font-size: 9px;
  font-weight: 500;
  fill: var(--ink-mute);
  pointer-events: none;
  text-anchor: middle;
  dominant-baseline: middle;
  paint-order: stroke;
  stroke: #fff;
  stroke-width: 2.5px;
  stroke-linejoin: round;
}
.map-pinyin.on-active { fill: #fff; stroke: var(--accent); }

.map-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--ink);
  color: #fff;
  padding: 10px 14px;
  font-family: var(--sans);
  font-size: 12px;
  line-height: 1.4;
  max-width: 220px;
  z-index: 10;
  opacity: 0;
  transform: translate(-50%, calc(-100% - 12px));
  transition: opacity 120ms ease;
}
.map-tooltip.show { opacity: 1; }
.map-tooltip strong { display: block; font-size: 13px; margin-bottom: 2px; }
.map-tooltip .pinyin { color: #aaa; font-style: italic; }

.detail-card {
  border-top: 2px solid var(--ink);
  padding-top: 24px;
  font-family: var(--sans);
  position: sticky;
  top: 32px;
}
.detail-card .big-char {
  font-family: var(--hanzi);
  font-size: 96px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--ink);
  display: inline-block;
}
.detail-card .char-wrap {
  display: inline-block;
  text-align: center;
}
.detail-card .char-wrap .pinyin {
  width: 100%;
}
.detail-card .pinyin {
  font-family: var(--serif);
  font-style: italic;
  font-size: 22px;
  color: var(--ink-soft);
  margin: 14px 0 18px;
}
.detail-card .name {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}
.detail-card .en {
  font-size: 13px;
  color: var(--ink-mute);
  margin-bottom: 24px;
}
.detail-card .stat-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  margin-bottom: 20px;
}
.detail-card .stat-label {
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 4px;
}
.detail-card .stat-val {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
}
.detail-card .note {
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-soft);
}

/* ---------- Plate types ---------- */
.types-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 56px 48px;
  margin-top: 24px;
}
@media (max-width: 760px) { .types-grid { grid-template-columns: 1fr; } }

.type-card { display: flex; flex-direction: column; align-items: flex-start; }
.type-card .plate {
  margin-bottom: 20px;
  cursor: pointer;
}
.type-meta {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}
.type-meta .num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
}
.type-meta h3 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.type-meta .cn {
  font-family: var(--hanzi);
  color: var(--ink-mute);
  font-size: 16px;
  position: relative;
  top: -3px;
}
.type-card p {
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin-bottom: 10px;
  max-width: 480px;
}
.type-card .issued {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* ---------- Fun facts section ---------- */
.funfacts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 56px;
  padding-top: 32px;
  border-top: 2px solid var(--ink);
}
.funfacts-grid .ff .sec-num {
  margin-bottom: 10px;
}
.funfacts-grid .ff p {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink-soft);
}
.funfacts-grid .ff p strong {
  color: var(--ink);
  font-weight: 700;
}
@media (max-width: 720px) {
  .funfacts-grid { grid-template-columns: 1fr; gap: 24px; }
}

/* ---------- Footer ---------- */
.coda {
  margin-top: 96px;
  padding-top: 32px;
  border-top: 2px solid var(--ink);
  display: flex;
  justify-content: space-between;
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* ---------- Plate-character font shaping ---------- */
/* The DIN-style font on real Chinese plates is heavy and squarish.
   We mimic it with Inter at heavy weight and condensed letter-spacing. */
.plate-char:not(.hanzi):not(.dot) {
  font-family: var(--plate-font);
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* Subtle plate noise/texture */
.plate.has-texture {
  background-image:
    radial-gradient(circle at 30% 20%, rgba(255,255,255,0.06), transparent 40%),
    radial-gradient(circle at 70% 80%, rgba(0,0,0,0.08), transparent 50%);
}