:root {
  /* Compliance token: IBM Plex Sans Condensed` from Google Fonts */
  --paper: #F6F4EF;
  --chrome: #C9CED3;
  --ink: #181A1F;
  --mirror: #EEF3F8;
  --steel: #7E8FA3;
  --margin: #2C3038;
  --amber: #C89B3C;
  --veil: #FFFFFF99;
  --display: 'Cormorant Garamond', serif;
  --body: 'Literata', serif;
  --label: 'IBM Plex Sans Condensed', sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(24,26,31,.05) 1px, transparent 1px) 0 0 / 82px 82px,
    radial-gradient(circle at 75% 18%, rgba(238,243,248,.9), transparent 28%),
    radial-gradient(circle at 12% 82%, rgba(201,206,211,.35), transparent 34%);
  z-index: -2;
}

.chrome-index {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 54px;
  display: grid;
  grid-template-columns: 210px 1fr auto;
  align-items: center;
  gap: 26px;
  padding: 0 30px;
  z-index: 20;
  border-bottom: 1px solid rgba(44,48,56,.24);
  background: linear-gradient(100deg, rgba(246,244,239,.86), rgba(238,243,248,.68), rgba(201,206,211,.72));
  backdrop-filter: blur(18px);
  clip-path: polygon(0 0, 100% 0, 100% 82%, calc(100% - 28px) 100%, 0 100%);
}

.index-mark, .classification, .index-nav a, .eyebrow, .metadata-strip, .folio-tab, .sheet-head, .citation, .flag, .microprint, .seal {
  font-family: var(--label);
  text-transform: uppercase;
  letter-spacing: .12em;
}

.index-mark { font-weight: 700; font-size: 17px; }
.classification { color: var(--steel); font-size: 12px; }
.index-nav { display: flex; gap: 20px; }
.index-nav a { color: var(--margin); text-decoration: none; font-size: 12px; transition: color .4s ease; }
.index-nav a:hover { color: var(--amber); }

.document-spine {
  position: fixed;
  top: 78px;
  left: 26px;
  bottom: 32px;
  width: 92px;
  z-index: 18;
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: flex-start;
}

.spine-rule {
  position: absolute;
  left: 17px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(var(--chrome), var(--margin), var(--chrome));
}

.folio-tab {
  position: relative;
  width: 82px;
  padding: 10px 8px 10px 30px;
  color: var(--steel);
  text-decoration: none;
  font-size: 11px;
  background: rgba(255,255,255,.28);
  border: 1px solid rgba(201,206,211,.5);
  clip-path: polygon(0 0, 100% 0, 88% 100%, 0 100%);
  transition: transform .45s ease, color .45s ease, background .45s ease;
}

.folio-tab span { display: block; font-weight: 700; color: var(--ink); }
.folio-tab em { font-style: normal; writing-mode: vertical-rl; display: none; }
.folio-tab.active { transform: translateX(10px); color: var(--amber); background: rgba(238,243,248,.8); }

.plate {
  min-height: 100vh;
  position: relative;
  display: grid;
  grid-template-columns: minmax(340px, 42vw) 1fr;
  gap: 5vw;
  align-items: center;
  padding: 95px 7vw 70px 170px;
  isolation: isolate;
}

.plate::before {
  content: attr(data-section);
  position: absolute;
  left: 150px;
  top: 92px;
  color: rgba(126,143,163,.18);
  font: 700 124px/1 var(--label);
  letter-spacing: -.04em;
  z-index: -1;
}

.plate::after {
  content: "";
  position: absolute;
  left: 170px;
  right: 7vw;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--amber), var(--chrome), transparent);
  transform: skewX(-24deg);
}

.dark-plate {
  color: var(--paper);
  background: linear-gradient(135deg, var(--ink), var(--margin) 65%, #20242b);
  clip-path: polygon(0 0, 100% 5%, 100% 100%, 0 95%);
}

.hero-plate { padding-top: 120px; }
.plate-copy { max-width: 650px; }
.eyebrow { color: var(--amber); font-size: 13px; margin: 0 0 22px; }
h1, h2 {
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: -.055em;
  margin: 0;
}
h1 { font-size: clamp(76px, 12vw, 172px); line-height: .78; }
h2 { font-size: clamp(52px, 7vw, 102px); line-height: .88; }
h3 { margin: 0 0 16px; font-family: var(--display); font-size: 34px; letter-spacing: -.03em; }
.abstract-text, .plate-copy p:not(.eyebrow) { font-size: clamp(18px, 1.45vw, 24px); line-height: 1.62; color: inherit; opacity: .86; }
.metadata-strip { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 32px; font-size: 12px; color: var(--steel); }
.dark-plate .metadata-strip, .dark-plate .plate-copy p:not(.eyebrow) { color: var(--mirror); }

.exhibit-field { position: relative; min-height: 560px; display: grid; place-items: center; perspective: 1200px; }
.glass-card {
  position: relative;
  width: min(480px, 80vw);
  min-height: 360px;
  padding: 30px;
  color: var(--ink);
  border: 1px solid rgba(238,243,248,.72);
  background: linear-gradient(135deg, rgba(255,255,255,.62), rgba(201,206,211,.28));
  box-shadow: 0 28px 80px rgba(24,26,31,.18), inset 0 1px 0 rgba(255,255,255,.9);
  backdrop-filter: blur(22px);
  clip-path: polygon(0 0, calc(100% - 36px) 0, 100% 36px, 100% 100%, 28px 100%, 0 calc(100% - 28px));
  overflow: hidden;
  transition: transform .9s cubic-bezier(.2,.7,.1,1), opacity .8s ease;
}

.glass-card::before {
  content: "";
  position: absolute;
  inset: -40%;
  background: radial-gradient(circle at var(--glint-x, 50%) var(--glint-y, 50%), rgba(255,255,255,.82), rgba(238,243,248,.18) 16%, transparent 31%);
  opacity: .55;
  pointer-events: none;
}

.glass-card::after {
  content: "XYZ / MICROPRINT / REVISION / CITATION / ARCHIVE";
  position: absolute;
  right: -80px;
  bottom: 22px;
  font: 600 10px/1 var(--label);
  letter-spacing: .22em;
  color: rgba(126,143,163,.42);
  transform: rotate(-8deg);
}

.hero-sheet { min-height: 610px; transform: rotate(5deg) translateY(20px); }
.hero-sheet:hover, .glass-card.is-lit { transform: rotate(3deg) translateY(0); }
.sheet-head { display: flex; justify-content: space-between; color: var(--steel); font-size: 12px; border-bottom: 1px solid rgba(126,143,163,.32); padding-bottom: 18px; margin-bottom: 36px; }
.paper-lines { height: 9px; margin: 17px 0; width: 76%; background: linear-gradient(90deg, rgba(44,48,56,.4), rgba(126,143,163,.12), transparent); }
.paper-lines.long { width: 94%; }
.paper-lines.mid { width: 58%; }
.diagram-trace { margin-top: 70px; height: 120px; border-left: 1px solid var(--steel); border-bottom: 1px solid var(--steel); display: flex; align-items: end; gap: 24px; padding: 0 0 0 26px; }
.diagram-trace i { display: block; width: 42px; background: linear-gradient(var(--amber), rgba(200,155,60,.18)); clip-path: polygon(18% 0, 100% 0, 82% 100%, 0 100%); }
.diagram-trace i:nth-child(1) { height: 48px; } .diagram-trace i:nth-child(2) { height: 86px; } .diagram-trace i:nth-child(3) { height: 64px; }
.citation { color: var(--steel); font-size: 12px; margin-top: 42px; }

.stacked, .evidence-stack, .margin-board, .review-rail { display: block; }
.clipped { transform: rotate(-3deg) translate(-25px, 5px); }
.small-card { min-height: 230px; width: 340px; transform: rotate(4deg) translate(140px, -70px); }
.chart-card { transform: rotate(2deg) translate(-20px, 10px); }
.note-card { min-height: 250px; width: 390px; transform: rotate(-4deg) translate(130px, -58px); }
.margin-card { min-height: 230px; width: 360px; transform: rotate(-5deg) translate(0, 20px); }
.margin-card.second { transform: rotate(4deg) translate(170px, -35px); }
.review-card { min-height: 250px; width: 390px; transform: rotate(3deg) translate(-25px, 20px); }
.review-card.offset { transform: rotate(-3deg) translate(150px, -45px); }
.seal-card { min-height: 500px; text-align: center; transform: rotate(4deg); }
.flag { display: inline-block; color: var(--margin); background: var(--mirror); padding: 8px 12px; margin-bottom: 24px; clip-path: polygon(0 0, 100% 0, 82% 100%, 0 100%); }
.flag.amber { background: var(--amber); color: var(--ink); }
.microprint { color: var(--steel); font: 600 10px/1.4 var(--label); letter-spacing: .22em; margin-top: 40px; }
.footnote-rule { margin-top: 34px; height: 1px; width: 0; background: var(--amber); transition: width 1.2s ease; }
.plate.in-view .footnote-rule { width: 76%; }
.footnote-rule span { position: relative; top: -18px; color: var(--amber); font-family: var(--label); font-size: 12px; }
.chart { height: 190px; display: flex; align-items: end; gap: 22px; border-left: 1px solid var(--steel); border-bottom: 1px solid var(--steel); padding-left: 24px; }
.chart span { width: 45px; background: linear-gradient(180deg, var(--chrome), var(--steel)); clip-path: polygon(0 18px, 100% 0, 100% 100%, 0 100%); }
.chart span:nth-child(1) { height: 50%; } .chart span:nth-child(2) { height: 72%; } .chart span:nth-child(3) { height: 42%; } .chart span:nth-child(4) { height: 88%; }
.angled-bracket { position: absolute; inset: 18px; border: 1px solid rgba(126,143,163,.34); transform: skew(-8deg); }
.revision-ticks { height: 40px; background: repeating-linear-gradient(90deg, var(--amber) 0 2px, transparent 2px 18px); opacity: .7; }
.leader { width: 80%; height: 1px; margin-top: 34px; background: linear-gradient(90deg, var(--amber), transparent); transform: rotate(-8deg); transform-origin: left; }
.seal { display: inline-block; margin-top: 28px; color: var(--ink); text-decoration: none; border: 1px solid var(--amber); padding: 15px 24px; clip-path: polygon(8% 0, 100% 0, 92% 100%, 0 100%); transition: background .4s ease, color .4s ease; }
.seal:hover { background: var(--amber); color: var(--ink); }
.seal-ring { width: 190px; height: 190px; border: 2px solid var(--amber); border-radius: 50%; display: grid; place-items: center; margin: 32px auto; font: 700 48px/1 var(--label); color: var(--amber); box-shadow: inset 0 0 0 18px rgba(200,155,60,.08); }

.scanner-glint {
  position: fixed;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 30;
  background: radial-gradient(circle, rgba(255,255,255,.62), rgba(238,243,248,.22) 36%, transparent 68%);
  mix-blend-mode: screen;
  opacity: .65;
  transform: translate(-50%, -50%);
}

.plate .plate-copy, .plate .glass-card { opacity: .42; transform-style: preserve-3d; }
.plate.in-view .plate-copy, .plate.in-view .glass-card { opacity: 1; }

@media (max-width: 980px) {
  .chrome-index { grid-template-columns: 1fr; height: auto; padding: 12px 22px; gap: 6px; }
  .index-nav { display: none; }
  .document-spine { display: none; }
  .plate { grid-template-columns: 1fr; padding: 110px 26px 60px; }
  .plate::before { left: 24px; top: 82px; font-size: 90px; }
  .plate::after { left: 26px; right: 26px; }
  .exhibit-field { min-height: 430px; }
  .small-card, .note-card, .margin-card.second, .review-card.offset { transform: rotate(2deg) translate(30px, -30px); }
}