/* ChinaEV Global — research preview. System stacks only; no external assets. */

:root {
  --paper: #f7f4ee;
  --paper-raise: #fffdf9;
  --ink: #1c2230;
  --ink-soft: #4a5164;
  --navy: #14213d;
  --copper: #9a5b33;
  --teal: #2f6f6a;
  --line: #d9d2c5;
  --serif: Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 68rem; margin: 0 auto; padding: 0 1.5rem; }

a { color: var(--teal); text-underline-offset: 3px; }
a:hover { color: var(--copper); }

:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--navy);
  color: #fff;
  padding: 0.75rem 1.25rem;
  z-index: 10;
}
.skip-link:focus { left: 0.5rem; top: 0.5rem; }

/* Header */
.site-header { border-bottom: 1px solid var(--line); }
.header-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  padding-top: 1.75rem;
}
.brand {
  font-family: var(--serif);
  font-size: 1.35rem;
  letter-spacing: 0.14em;
  color: var(--navy);
  text-decoration: none;
  font-weight: 700;
}
.brand-slash { color: var(--copper); padding: 0 0.2em; font-weight: 400; }
.site-nav { display: flex; gap: 1.75rem; }
.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
.site-nav a:hover { color: var(--copper); border-bottom-color: var(--copper); }
.site-tagline {
  padding-top: 0.5rem;
  padding-bottom: 1.5rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
  max-width: 44rem;
}
.site-tagline strong { color: var(--copper); }

/* Hero */
.hero { padding: 4.5rem 1.5rem 3.5rem; }
.kicker {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--copper);
  margin: 0 0 1rem;
  font-weight: 600;
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(2.1rem, 5.4vw, 3.6rem);
  line-height: 1.14;
  color: var(--navy);
  max-width: 21ch;
  margin: 0 0 1.5rem;
}
.hero-lede {
  font-size: 1.15rem;
  max-width: 38rem;
  margin: 0 0 1rem;
  color: var(--ink);
}
.hero-note { color: var(--ink-soft); font-style: italic; font-family: var(--serif); }
.hero-meta {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 3rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.thin-top { border-top: 1px solid var(--line); }
.meta-label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.15rem;
}

/* Sections */
.section { padding: 3.5rem 1.5rem; border-top: 1px solid var(--line); }
.section-head { max-width: 40rem; margin-bottom: 2.5rem; }
.section-head h2, .method-grid h3 {
  font-family: var(--serif);
  font-weight: 400;
  color: var(--navy);
}
.section-head h2 { font-size: clamp(1.7rem, 3.4vw, 2.3rem); margin: 0 0 0.75rem; }
.section-head p { color: var(--ink-soft); margin: 0; }

/* Dossier: asymmetric two-column composition */
.dossier {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 3rem;
  align-items: start;
}
.dossier-id h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.8rem;
  color: var(--navy);
  margin: 0.25rem 0 1.25rem;
  line-height: 1.2;
}
.spec-list { margin: 0; }
.spec-list div {
  padding: 0.7rem 0;
  border-top: 1px solid var(--line);
}
.spec-list dt {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.15rem;
}
.spec-list dd { margin: 0; font-size: 0.95rem; }
.quiet { color: var(--ink-soft); font-size: 0.85em; font-style: italic; }

/* Data panel */
.data-panel {
  background: var(--paper-raise);
  border: 1px solid var(--line);
  border-top: 3px solid var(--navy);
  padding: 1.75rem 2rem 1.5rem;
}
.panel-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.25rem;
  color: var(--navy);
  margin: 0 0 0.5rem;
}
.measurement {
  display: grid;
  grid-template-columns: minmax(9rem, 12rem) 1fr;
  grid-template-areas:
    "label value"
    "label src";
  column-gap: 1.5rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--line);
  align-items: baseline;
}
.measurement:first-of-type { border-top: 0; }
.m-label {
  grid-area: label;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.m-value {
  grid-area: value;
  font-family: var(--serif);
  font-size: 2rem;
  line-height: 1.15;
  color: var(--ink);
}
.m-unit { font-size: 1.05rem; color: var(--ink-soft); }
.m-src {
  grid-area: src;
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-top: 0.2rem;
}
.measurement-unverified .m-value {
  font-size: 1.25rem;
  font-style: italic;
  color: var(--copper);
}
.panel-footnote {
  margin: 1rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--ink-soft);
}

/* Evidence */
.evidence-item {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper-raise);
}
.evidence-item summary {
  cursor: pointer;
  padding: 1.1rem 1.5rem;
  font-family: var(--serif);
  font-size: 1.1rem;
  color: var(--navy);
  list-style-position: inside;
}
.evidence-item summary:hover { color: var(--copper); }
.evidence-body { padding: 0.25rem 1.5rem 1.5rem; }
.evidence-dl { margin: 0; }
.evidence-dl div {
  display: grid;
  grid-template-columns: minmax(9rem, 12rem) 1fr;
  gap: 1.5rem;
  padding: 0.7rem 0;
  border-top: 1px solid var(--line);
}
.evidence-dl dt {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  padding-top: 0.2rem;
}
.evidence-dl dd { margin: 0; font-size: 0.95rem; overflow-wrap: anywhere; }
.hash {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.82rem;
  color: var(--ink-soft);
}

/* Method */
.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem 3rem;
}
.method-grid h3 { font-size: 1.2rem; margin: 0 0 0.5rem; }
.method-grid p { margin: 0; font-size: 0.95rem; color: var(--ink-soft); }

/* Footer */
.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--line);
  background: var(--navy);
  color: #d8dce6;
  padding: 2.5rem 0;
  font-size: 0.9rem;
}
.footer-row { display: grid; gap: 0.9rem; max-width: 44rem; }
.footer-brand {
  font-family: var(--serif);
  letter-spacing: 0.14em;
  font-weight: 700;
  color: #fff;
  margin: 0;
}
.footer-brand span { color: #c98d5f; font-weight: 400; }
.site-footer a { color: #a9c4c1; }
.site-footer nav { display: flex; gap: 1.5rem; }
.site-footer .quiet { color: #9aa2b5; }

/* Responsive */
@media (max-width: 56rem) {
  .dossier { grid-template-columns: 1fr; gap: 2rem; }
  .method-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { padding-top: 3rem; }
}

@media (max-width: 40rem) {
  .measurement, .evidence-dl div {
    grid-template-columns: 1fr;
    grid-template-areas: none;
  }
  .m-label, .evidence-dl dt { margin-bottom: 0.2rem; }
  .measurement { grid-template-areas: "label" "value" "src"; }
  .method-grid { grid-template-columns: 1fr; gap: 1.75rem; }
  .data-panel { padding: 1.25rem 1.25rem 1rem; }
  .m-value { font-size: 1.7rem; }
  .section { padding: 2.5rem 1.5rem; }
}

@media (min-width: 90rem) {
  .hero { padding-top: 6rem; }
}

/* Final editorial composition */
.wrap {max-width:76rem; padding-left:clamp(1.3rem,4vw,3.5rem); padding-right:clamp(1.3rem,4vw,3.5rem)}
.site-tagline {max-width:76rem; font-size:.85rem; display:flex; justify-content:space-between; padding-bottom:1rem}
.edition {color:var(--teal); letter-spacing:.14em; font-size:.72rem}
.hero {padding-top:3.8rem; padding-bottom:2.4rem; position:relative}
.hero h1 {max-width:100%; font-size:clamp(2.7rem,5.5vw,4.6rem); letter-spacing:-.055em; line-height:1.08; margin-bottom:1.25rem}
.hero h1 em {font-weight:400; color:var(--teal)}
.hero-lede {font-size:1.06rem; max-width:39rem}
.hero-note {font-family:var(--sans); font-style:normal; display:flex; align-items:center; flex-wrap:wrap; gap:1rem 1.8rem; margin-top:1.6rem}
.read-record {background:var(--navy); color:var(--paper); padding:.7rem 1.05rem; text-decoration:none; font-size:.88rem}
.read-record span {margin-left:1.5rem}
.read-record:hover {background:var(--teal); color:white}
.snapshot-label {font-size:.8rem; color:var(--ink-soft)}
.hero-meta {margin-top:2rem; justify-content:space-between; gap:1rem}
.section-number {font:500 .85rem var(--sans); color:var(--copper); margin-right:.7rem; vertical-align:middle}
.section-head {max-width:100%; display:grid; grid-template-columns:2fr 3fr; gap:3rem; align-items:start; margin-bottom:2rem}
.section-head h2 {font-size:1.85rem; letter-spacing:-.025em}
.section-head p {font-size:.94rem}
.dossier-id h3 {font-size:3.1rem; max-width:9ch; letter-spacing:-.04em}
.data-panel {border:0; border-top:2px solid var(--navy); background:transparent; padding:1.15rem 0}
.panel-title {font:600 .75rem var(--sans); text-transform:uppercase; letter-spacing:.14em; margin-bottom:1rem}
.m-value {font-size:2.45rem; font-variant-numeric:tabular-nums}
.measurement {grid-template-columns:1fr 1.4fr; padding:1.2rem 0}
.m-src {font-size:.83rem}
.spec-list dd {overflow-wrap:anywhere}
.footer-row {max-width:76rem}
.section {scroll-margin-top:1rem}
@media(max-width:56rem){.section-head{grid-template-columns:1fr; gap:.4rem}.dossier-id h3{max-width:100%; font-size:2.4rem}.hero{padding-top:2.6rem}.dossier{gap:1.2rem}.site-tagline{display:block}.edition{display:none}}
@media(max-width:40rem){.brand{font-size:1.12rem}.site-nav{gap:1.25rem}.site-nav a{font-size:.76rem}.hero-meta{display:grid;grid-template-columns:1fr 1fr}.measurement{grid-template-columns:1fr 1fr;grid-template-areas:"label value" "src src"}.m-value{font-size:2rem}.m-src{margin-top:.5rem}.measurement-unverified .m-value{font-size:1.08rem}.hero h1{font-size:2.8rem}.hero-lede{font-size:1rem}.method-grid{gap:1.5rem}}

/* User-supplied brand artwork, displayed intact. */
.site-header { background:#fff; }
.header-row {align-items:center; padding-top:.55rem; gap:.5rem 2rem}
.brand {display:inline-flex; align-items:center; gap:.9rem; min-width:0}
.brand-logo {display:block; width:88px; height:88px; object-fit:contain; flex-shrink:0}
.brand-wordmark {white-space:nowrap; font-size:1.12rem; letter-spacing:.1em}
.site-tagline {padding-top:0; margin-top:.25rem}
.footer-logo-link {display:block; width:112px}
.footer-logo {display:block; width:112px; height:112px; object-fit:contain; border-radius:3px}
@media(max-width:40rem){.header-row{gap:.25rem 1rem}.brand{gap:.5rem}.brand-logo{width:68px;height:68px}.brand-wordmark{font-size:.96rem;letter-spacing:.07em}.site-nav{padding-bottom:.65rem}.site-tagline{font-size:.78rem}.footer-logo-link,.footer-logo{width:96px}.footer-logo{height:96px}}

/* ChinaEV visual identity: the EV letters always use brand green. */
:root { --brand-ev-green: #00857d; }
.brand-ev { color: var(--brand-ev-green); }