/* ==========================================================
   IAG 铝行业知识库 — Earth & Ink
   refined editorial · industrial cartography
   designed: 2026-04-25
   ========================================================== */

/* ---- 1. font + tokens ---- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;700;900&family=JetBrains+Mono:wght@400;500;700&family=Cormorant+Garamond:ital,wght@0,400;0,500;0,700;1,400&display=swap');

:root {
  /* paper / ink palette */
  --paper:        #f4ecde;
  --paper-deep:   #ebe1d0;
  --paper-edge:   #d8cdb8;
  --ink:          #1a1814;
  --ink-soft:     #3a3530;
  --ink-mute:     #6b6358;
  --ink-fade:     #9c9385;

  /* base accents — earth & ink heritage */
  --amber:        #ba7517;     /* bauxite ore */
  --amber-deep:   #8a4d05;
  --amber-glow:   #e0a04a;
  --rust:         #8b3a1f;
  --steel:        #475862;
  --moss:         #5e6e3b;

  /* —— chain stage palette (4 stages, earthy & cohesive) —— */
  --c-bauxite:    #ba7517;     /* i  · 铝土矿 — amber ore */
  --c-bauxite-d:  #8a4d05;
  --c-bauxite-l:  #e6c89a;
  --c-transport:  #3a5566;     /* ii · 物流 — sea blue */
  --c-transport-d:#22394a;
  --c-transport-l:#9bb1be;
  --c-alumina:    #8a6d4f;     /* iii · 氧化铝 — terracotta clay */
  --c-alumina-d:  #5d4a36;
  --c-alumina-l:  #d2bfa5;
  --c-smelter:    #a64a1c;     /* iv · 电解铝 — molten copper */
  --c-smelter-d:  #6e2f10;
  --c-smelter-l:  #e6a685;

  /* —— status palette —— */
  --c-ok:         #5e6e3b;     /* moss */
  --c-warn:       #d28a2b;     /* warm warning */
  --c-crit:       #8b3a1f;     /* rust */
  --c-info:       #3a5566;     /* sea blue */

  /* layout */
  --rule:         1px solid var(--ink);
  --rule-thin:    1px solid var(--ink-fade);
  --rule-mute:    1px solid var(--paper-edge);

  /* —— typography ——
     Noto Serif SC is primary for ALL CJK (display + body).
     Cormorant Garamond is reserved for Latin italic accents (em / numerals). */
  --ff-display:        "Noto Serif SC", "Cormorant Garamond", Georgia, serif;
  --ff-display-italic: "Cormorant Garamond", "Noto Serif SC", Georgia, serif;
  --ff-body:           "Noto Serif SC", Georgia, serif;
  --ff-mono:           "JetBrains Mono", "SF Mono", Menlo, monospace;

  --fs-mega:      clamp(3.5rem, 8vw, 6.5rem);
  --fs-h1:        clamp(2.4rem, 4vw, 3.6rem);
  --fs-h2:        clamp(1.5rem, 2.4vw, 2rem);
  --fs-h3:        1.15rem;
  --fs-body:      1rem;
  --fs-small:     0.85rem;
  --fs-mono:      0.78rem;

  --maxw:         1280px;
  --gutter:       clamp(1.5rem, 4vw, 4rem);
}

/* ---- 2. base / paper background ---- */
* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--ff-body);
  font-size: var(--fs-body);
  line-height: 1.55;
  font-feature-settings: "kern", "liga", "palt";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* faint paper grain via radial micro-noise */
body {
  background-image:
    radial-gradient(circle at 20% 12%, rgba(186,117,23,0.05) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(71,88,98,0.04) 0%, transparent 45%),
    repeating-radial-gradient(circle at 50% 50%, rgba(26,24,20,0.012) 0px, rgba(26,24,20,0.012) 1px, transparent 1px, transparent 2px);
  background-attachment: fixed;
  min-height: 100vh;
}

a { color: var(--ink); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--amber-deep); }

img { max-width: 100%; display: block; }

/* ---- 3. layout primitives ---- */
.shell {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.rule {
  height: 1px;
  background: var(--ink);
  margin: 0;
  border: 0;
}
.rule--thin { background: var(--ink-fade); height: 1px; }
.rule--double {
  height: 4px;
  background:
    linear-gradient(var(--paper), var(--paper)) center/100% 2px no-repeat,
    var(--ink);
}

/* ---- 4. masthead ---- */
.masthead {
  border-bottom: var(--rule);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(2px);
}
.masthead .shell {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}
.masthead__brand {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  font-family: var(--ff-display);
}
.masthead__mark {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: var(--ff-mono);
  color: var(--amber-deep);
}
.masthead__title {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--ink);
}
.masthead__nav {
  display: flex;
  gap: 1.6rem;
  font-family: var(--ff-mono);
  font-size: var(--fs-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.masthead__nav a {
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
.masthead__nav a:hover,
.masthead__nav a.active {
  color: var(--ink);
  border-bottom-color: var(--amber);
}
/* Hamburger button */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  padding: 8px; border: none; background: transparent;
  cursor: pointer; z-index: 110;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--ink); transition: transform .2s, opacity .2s;
}
.hamburger.is-open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

.menu-open { overflow: hidden; }
@media (max-width: 720px) {
  .hamburger { display: flex; }
  .masthead__nav {
    display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: var(--paper); z-index: 100;
    flex-direction: column; align-items: center; justify-content: center;
    gap: 1.8rem; font-size: 1.1rem;
    overscroll-behavior: contain;
  }
  .masthead__nav.is-open { display: flex; }
}

/* ---- 5. hero ---- */
.hero {
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(2rem, 5vw, 4rem);
  border-bottom: var(--rule);
  position: relative;
  overflow: hidden;
}
.hero__meta {
  font-family: var(--ff-mono);
  font-size: var(--fs-mono);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-mute);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.hero__meta::before,
.hero__meta::after {
  content: "";
  flex: 0 0 2.5rem;
  height: 1px;
  background: var(--ink-fade);
}
.hero__meta::after { flex: 1 1 auto; }
.hero__title {
  font-family: var(--ff-display);
  font-size: var(--fs-mega);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin: 0 0 1.2rem;
  color: var(--ink);
}
.hero__title em {
  font-family: var(--ff-display-italic);
  font-style: italic;
  font-weight: 400;
  color: var(--amber-deep);
}
.hero__lede {
  max-width: 60ch;
  font-family: var(--ff-body);
  font-size: 1.1rem;
  line-height: 1.65;
  color: var(--ink-soft);
}
.hero__lede strong {
  font-weight: 700;
  color: var(--ink);
  background: linear-gradient(transparent 65%, var(--amber-glow) 65%, var(--amber-glow) 90%, transparent 90%);
  padding: 0 0.1em;
}
.hero__decor {
  position: absolute;
  right: -3vw;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--ff-display);
  font-size: clamp(8rem, 22vw, 18rem);
  font-style: italic;
  color: var(--paper-edge);
  z-index: 0;
  pointer-events: none;
  font-weight: 400;
  user-select: none;
}
.hero > .shell { position: relative; z-index: 1; }

/* ---- 6. chain cards (4-up) ---- */
.section {
  padding: clamp(3rem, 6vw, 5rem) 0;
  border-bottom: var(--rule);
}
.section__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 2rem;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}
.section__title {
  font-family: var(--ff-display);
  font-size: var(--fs-h1);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0;
  line-height: 1;
}
.section__title em {
  font-family: var(--ff-display-italic);
  font-style: italic; color: var(--amber-deep); font-weight: 400;
}
.section__num {
  font-family: var(--ff-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.chain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: var(--rule);
  border-left: var(--rule);
}
.chain-card {
  border-right: var(--rule);
  border-bottom: var(--rule);
  padding: 2rem 1.6rem;
  background: var(--paper);
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  position: relative;
  text-decoration: none;
  color: inherit;
  transition: background .25s ease;
  min-height: 280px;
  cursor: pointer;
}
.chain-card:hover {
  background: var(--paper-deep);
}
.chain-card:hover .chain-card__title em {
  color: var(--amber);
}
.chain-card__num {
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.chain-card__title {
  font-family: var(--ff-display);
  font-size: 2rem;
  font-weight: 500;
  line-height: 1;
  margin: 0;
  letter-spacing: -0.01em;
}
.chain-card__title em {
  font-style: normal;
  font-weight: 400;
  color: var(--ink-mute);
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-family: var(--ff-mono);
  margin-top: 0.5rem;
  transition: color .25s ease;
}
.chain-card__metric {
  margin-top: auto;
  padding-top: 1rem;
  border-top: var(--rule-thin);
}
.chain-card__metric dt {
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 0.3rem;
}
.chain-card__metric dd {
  font-family: var(--ff-mono);
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.chain-card__metric dd small {
  font-weight: 400;
  font-size: 0.7rem;
  color: var(--ink-mute);
  margin-left: 0.3rem;
}
.chain-card__arrow {
  position: absolute;
  bottom: 2rem;
  right: 1.6rem;
  font-family: var(--ff-mono);
  font-size: 1.2rem;
  color: var(--ink-mute);
  transition: transform .25s ease, color .25s ease;
}
.chain-card:hover .chain-card__arrow {
  color: var(--amber);
  transform: translate(4px, -4px);
}
@media (max-width: 980px) { .chain-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .chain-grid { grid-template-columns: 1fr; } }

/* ---- 7. world map ---- */
.map-frame {
  border: var(--rule);
  background: var(--paper-deep);
  position: relative;
  aspect-ratio: 16/9;
  width: 100%;
  overflow: hidden;
}
.map-frame__chart { width: 100%; height: 100%; }
.map-caption {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 2rem;
  padding-top: 0.8rem;
  font-family: var(--ff-mono);
  font-size: var(--fs-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-mute);
}
.map-caption .legend {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.map-caption .legend-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--amber);
  border: 1px solid var(--amber-deep);
  display: inline-block;
}

/* ---- 8. views (最新观点) ---- */
.views-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: var(--rule);
  border-left: var(--rule);
}
.view-card {
  border-right: var(--rule);
  border-bottom: var(--rule);
  padding: 2rem 1.8rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: var(--paper);
  position: relative;
}
.view-card__index {
  font-family: var(--ff-display);
  font-style: italic;
  font-size: 4rem;
  font-weight: 400;
  line-height: 0.9;
  color: var(--amber);
  margin: 0;
}
.view-card__speaker {
  font-family: var(--ff-mono);
  font-size: var(--fs-mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
  margin: 0;
}
.view-card__speaker strong { color: var(--ink); font-weight: 700; }
.view-card__title {
  font-family: var(--ff-display);
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.15;
  margin: 0;
  color: var(--ink);
}
.view-card__headline {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
  flex: 1;
}
.view-card__metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0.5rem 0;
  padding: 0.7rem 0;
  border-top: var(--rule-thin);
  border-bottom: var(--rule-thin);
}
.view-card__metrics .m {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1 1 auto;
}
.view-card__metrics .m-label {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  font-size: 0.62rem;
}
.view-card__metrics .m-value {
  color: var(--ink);
  font-weight: 700;
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}
.view-card__links {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.view-card__links a {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  transition: color .2s ease;
}
.view-card__links a::before {
  content: "→";
  color: var(--amber);
  font-weight: 700;
}
.view-card__links a:hover { color: var(--amber-deep); }
.view-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}
.view-card__tags span {
  font-family: var(--ff-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 2px 6px;
  border: var(--rule-thin);
  color: var(--ink-mute);
}
@media (max-width: 980px) { .views-grid { grid-template-columns: 1fr; } }

/* ---- 9. footer / colophon ---- */
.colophon {
  padding: 3rem 0 4rem;
  border-top: var(--rule);
  background: var(--paper-deep);
}
.colophon__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.colophon__title {
  font-family: var(--ff-display);
  font-size: 1.4rem;
  font-weight: 500;
  font-style: italic;
  margin: 0 0 0.5rem;
  color: var(--ink-soft);
}
.colophon__body {
  font-size: 0.85rem;
  color: var(--ink-mute);
  line-height: 1.6;
}
.colophon__list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: var(--ff-mono);
  font-size: var(--fs-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.colophon__list li { margin-bottom: 0.5rem; color: var(--ink-soft); }
.colophon__list a { color: inherit; border-bottom: 1px solid var(--ink-fade); }
.colophon__list a:hover { border-bottom-color: var(--amber); color: var(--amber-deep); }
.colophon__small {
  margin-top: 2.5rem;
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-fade);
  text-align: center;
}
.colophon--sm { padding: 1rem 0; }
.colophon--sm .rule--thin { margin-bottom: 0.6rem; }
.colophon--sm .colophon__title { font-size: 0.65rem; letter-spacing: 0.08em; margin-bottom: 0.3rem; }
.colophon--sm .colophon__body { font-size: 0.68rem; line-height: 1.4; }
.colophon--sm .colophon__sig { font-size: 0.58rem; margin-top: 0.6rem; }
.colophon--sm .colophon__grid { gap: 1rem; }

@media (max-width: 720px) {
  .colophon__grid { grid-template-columns: 1fr; gap: 1.5rem; }
}

/* ---- 10. utility / motion ---- */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.9s ease forwards;
}
.fade-up.d1 { animation-delay: 0.1s; }
.fade-up.d2 { animation-delay: 0.25s; }
.fade-up.d3 { animation-delay: 0.4s; }
.fade-up.d4 { animation-delay: 0.55s; }
.fade-up.d5 { animation-delay: 0.7s; }

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ---- 11. markdown body (for chain detail) ---- */
.kb-body {
  max-width: 78ch;
  font-family: var(--ff-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink-soft);
}
.kb-body h1, .kb-body h2, .kb-body h3 {
  font-family: var(--ff-display);
  color: var(--ink);
  font-weight: 500;
  letter-spacing: -0.01em;
}
.kb-body h1 { font-size: 2.4rem; line-height: 1.05; margin: 0 0 1rem; }
.kb-body h2 {
  font-size: 1.6rem; margin: 2.5rem 0 1rem;
  padding-bottom: 0.4rem; border-bottom: var(--rule-thin);
}
.kb-body h3 { font-size: 1.2rem; margin: 1.8rem 0 0.7rem; }
.kb-body p { margin: 0 0 1rem; }
.kb-body strong { color: var(--ink); font-weight: 700; }
.kb-body code {
  font-family: var(--ff-mono);
  font-size: 0.85em;
  background: var(--paper-deep);
  padding: 0.1em 0.35em;
  border: var(--rule-thin);
}
.kb-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.5rem 0;
  font-family: var(--ff-mono);
  font-size: 0.85rem;
}
.kb-body th, .kb-body td {
  border: var(--rule-thin);
  padding: 0.5rem 0.75rem;
  text-align: left;
  vertical-align: top;
}
.kb-body th {
  background: var(--paper-deep);
  font-weight: 700;
  color: var(--ink);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.kb-body td { font-variant-numeric: tabular-nums; }
.kb-body blockquote {
  border-left: 3px solid var(--amber);
  padding: 0.5rem 0 0.5rem 1.2rem;
  margin: 1.2rem 0;
  font-style: italic;
  color: var(--ink-soft);
  background: rgba(186,117,23,0.04);
}
.kb-body a {
  color: var(--amber-deep);
  border-bottom: 1px solid var(--ink-fade);
}
.kb-body a:hover { border-bottom-color: var(--amber); }
.kb-body ul, .kb-body ol { padding-left: 1.5rem; }
.kb-body li { margin: 0.3rem 0; }

/* ---- 12. additions for index page (Phase B Task 5) ---- */

/* section subtitle (under section title) */
.section__sub {
  font-family: var(--ff-body);
  font-size: 0.95rem;
  color: var(--ink-mute);
  max-width: 62ch;
  margin: -0.5rem 0 1.8rem;
  line-height: 1.65;
}

/* skeleton placeholder */
.kb-skeleton {
  text-align: center;
  font-family: var(--ff-mono);
  font-size: 0.85rem;
  color: var(--ink-mute);
  padding: 2.5rem 1rem;
  border: var(--rule-thin);
  background: rgba(232, 220, 196, 0.3);
}

/* error / note paragraphs near data sections */
.kb-note {
  font-family: var(--ff-mono);
  font-size: 0.78rem;
  color: var(--ink-mute);
  line-height: 1.6;
  margin: 0.6rem 0 0;
}
.kb-error {
  font-family: var(--ff-mono);
  font-size: 0.85rem;
  color: var(--rust);
  padding: 1.2rem;
  background: rgba(139,58,31,0.06);
  border-left: 3px solid var(--rust);
}

/* colophon signature line */
.colophon__sig {
  margin-top: 2.5rem;
  padding-top: 1.2rem;
  border-top: var(--rule-thin);
  text-align: center;
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  color: var(--ink-fade);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* fade-up: support BOTH auto-on-load (with inline animation-delay) AND is-in trigger */
.fade-up.deferred {
  opacity: 0;
  transform: translateY(20px);
  animation: none;
}
.fade-up.deferred.is-in {
  animation: fadeUp 0.9s ease forwards;
}
/* dynamically injected view cards also get the is-in path */
.view-card.fade-up {
  opacity: 0;
  transform: translateY(20px);
  animation: none;
}
.view-card.fade-up { opacity: 1; }
.view-card.fade-up.is-in {
  animation: fadeUp 0.9s ease forwards;
}

/* ==========================================================
   13. chain stage palette — applied via [data-stage]
   bauxite | transport | alumina | smelter
   ========================================================== */

.chain-card[data-stage="bauxite"]   { --stage: var(--c-bauxite);   --stage-d: var(--c-bauxite-d);   --stage-l: var(--c-bauxite-l); }
.chain-card[data-stage="transport"] { --stage: var(--c-transport); --stage-d: var(--c-transport-d); --stage-l: var(--c-transport-l); }
.chain-card[data-stage="alumina"]   { --stage: var(--c-alumina);   --stage-d: var(--c-alumina-d);   --stage-l: var(--c-alumina-l); }
.chain-card[data-stage="smelter"]   { --stage: var(--c-smelter);   --stage-d: var(--c-smelter-d);   --stage-l: var(--c-smelter-l); }

/* top accent bar inside chain-card */
.chain-card[data-stage]::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--stage, var(--amber));
  transition: height .25s ease;
}
.chain-card[data-stage]:hover::before { height: 6px; }
.chain-card[data-stage] .chain-card__num { color: var(--stage-d, var(--ink-mute)); }
.chain-card[data-stage]:hover .chain-card__arrow { color: var(--stage, var(--amber)); }
.chain-card[data-stage] .chain-card__metric dd { color: var(--ink); }
.chain-card[data-stage]:hover { background: linear-gradient(180deg, color-mix(in oklab, var(--stage-l) 35%, var(--paper-deep)) 0%, var(--paper-deep) 100%); }

/* ==========================================================
   14. view-card stage rotation — first 3 cards mapped to
   bauxite / smelter / alumina to match conference views
   ========================================================== */
.view-card:nth-child(1) .view-card__index { color: var(--c-bauxite); }
.view-card:nth-child(2) .view-card__index { color: var(--c-smelter); }
.view-card:nth-child(3) .view-card__index { color: var(--c-alumina); }
.view-card:nth-child(4) .view-card__index { color: var(--c-transport); }
.view-card .view-card__index { font-family: var(--ff-display-italic); }

.view-card__metrics .m-value {
  font-family: var(--ff-mono);
}
.view-card__title { letter-spacing: -0.005em; }
@media (max-width: 900px) { .views-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .views-grid { grid-template-columns: 1fr; } .view-card { padding: 1.5rem 1.2rem; } }

/* ==========================================================
   15. small typographic refinements
   ========================================================== */

/* numerals/Latin in headings get the italic Cormorant face */
.hero__title em,
.section__title em,
.chain-sec__title em,
.kb-body em,
.view-card__index {
  font-feature-settings: "kern", "liga", "swsh", "salt";
}

/* Cormorant Garamond italic for key numerals everywhere */
.num-italic {
  font-family: var(--ff-display-italic);
  font-style: italic;
  font-feature-settings: "tnum", "liga";
}