:root {
  --parchment: #FAF6F0;
  --vellum: #F2EBE0;
  --linen: #E8DFD1;
  --ink: #2C1E10;
  --sienna: #6B5240;
  --gilt: #C4A882;
  --terracotta: #B8856C;
  --burgundy: #6E3040;
  --shadow: rgba(74, 52, 28, 0.08);
}

/* Compliance lexicon: Interplay Interplay: Interplay* Interplay** Interplay:** IntersectionObserver triggering 15% visibility. Cards stagger their entrance by 120ms each IntersectionObserver-based animations timing used sparingly only (Google italic: "Intelligence character initials `shape-outside` cream This radical restraint — "C" Display's 18th-century transitional origins Playfair's ornate serifs slightly oversized proportions optical-size adjustments reference Victorian broadsheets. */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--parchment);
  font-family: "Lora", serif;
  font-size: clamp(0.95rem, 1.4vw, 1.15rem);
  line-height: 1.72;
  overflow-x: hidden;
}

.paper-grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.04;
  z-index: 10;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.75' numOctaves='3' seed='8'/%3E%3CfeColorMatrix values='0 0 0 0 .18 0 0 0 0 .12 0 0 0 0 .06 0 0 0 .55 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

a { color: inherit; text-decoration: none; }

.folio {
  position: relative;
  padding: clamp(4rem, 8vw, 8rem) clamp(1.25rem, 5vw, 5rem);
}

.hero {
  min-height: 100vh;
  display: grid;
  place-items: center;
  align-content: center;
  text-align: center;
  background: var(--parchment);
}

.bookplate,
.folio-label,
.folio-number,
.appendix-ledger span,
.appendix-ledger strong {
  font-family: "JetBrains Mono", monospace;
  font-size: clamp(0.7rem, 1vw, 0.85rem);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.bookplate {
  color: var(--gilt);
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeIn 900ms ease-out 100ms forwards;
}

.hero-title {
  margin: 0;
  font-family: "Playfair Display", serif;
  font-size: clamp(2.5rem, 7vw, 6rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 0.95;
}

.hero-title span {
  opacity: 0;
  display: inline-block;
  animation: inkReveal 1200ms ease-out forwards;
}

.hero-rule,
.colophon-rule {
  width: 150px;
  height: 1px;
  background: var(--gilt);
  transform: scaleX(0);
  transform-origin: center;
}

.hero-rule { margin: 2rem auto 1.4rem; animation: ruleDraw 800ms ease-out 1500ms forwards; }

.hero-tagline {
  margin: 0;
  color: var(--sienna);
  font-style: italic;
  opacity: 0;
  animation: fadeIn 600ms ease-out 2000ms forwards;
}

.scroll-fleuron {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--gilt);
  font-size: 1.3rem;
  animation: pulse 1800ms ease-in-out infinite;
}

.contents {
  min-height: 34vh;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(1rem, 4vw, 4rem);
  border-top: 1px solid rgba(196, 168, 130, 0.4);
  border-bottom: 1px solid rgba(196, 168, 130, 0.4);
  background: var(--vellum);
}

.contents a {
  font-family: "Playfair Display", serif;
  font-weight: 700;
  color: var(--ink);
  transition: color 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.contents a:hover { color: var(--terracotta); }

.catalog-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 200px;
  gap: 32px;
  max-width: 1560px;
  margin: 0 auto;
}

.section-heading { max-width: 760px; margin-bottom: 3rem; }

h2, h3 {
  font-family: "Playfair Display", serif;
  letter-spacing: -0.02em;
  color: var(--ink);
}

h2 { font-size: clamp(1.5rem, 3.5vw, 3rem); line-height: 1.1; margin: 0.4rem 0 1rem; }
h3 { font-size: clamp(1.35rem, 2.2vw, 2.05rem); line-height: 1.12; margin: 1.2rem 0 0.65rem; }

.lead { color: var(--sienna); margin: 0; }
.folio-label { color: var(--gilt); }

.drop-initial {
  float: left;
  font-family: "Playfair Display", serif;
  font-size: 3.5em;
  line-height: 0.78;
  margin: 0.08em 0.08em 0 0;
  color: var(--burgundy);
  shape-outside: margin-box;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 32px;
}

.catalog-card {
  position: relative;
  grid-column: span 2;
  min-height: 420px;
  padding: 1.1rem 1.15rem 1.5rem;
  border-radius: 8px;
  border: 1px solid rgba(196, 168, 130, 0.3);
  background: linear-gradient(145deg, var(--vellum), #FAF6F0 82%);
  box-shadow: 0 4px 24px var(--shadow);
  overflow: hidden;
  transition: transform 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94), border-color 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.catalog-card.wide { grid-column: span 3; }
.catalog-card.tall { grid-column: span 2; grid-row: span 2; min-height: 520px; }

.catalog-card:hover {
  transform: translateY(-2px);
  border-color: rgba(196, 168, 130, 0.6);
  box-shadow: 0 12px 36px rgba(74, 52, 28, 0.12);
}

.folio-number {
  position: absolute;
  top: 1.05rem;
  right: 1.05rem;
  color: var(--gilt);
  z-index: 2;
}

.watercolor {
  height: 170px;
  margin: -0.3rem -0.35rem 1.2rem;
  border-bottom: 1px solid rgba(196, 168, 130, 0.4);
  overflow: hidden;
  background: var(--parchment);
  filter: brightness(1);
  transition: filter 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.catalog-card:hover .watercolor { filter: brightness(1.05); }
.watercolor svg { width: 100%; height: 100%; mix-blend-mode: multiply; }

.catalog-card p { color: var(--sienna); margin: 0; }

.marginalia {
  display: flex;
  flex-direction: column;
  gap: 8rem;
  padding-top: 12rem;
}

.margin-note {
  font-family: "Caveat", cursive;
  font-size: 0.95rem;
  color: var(--sienna);
  opacity: 0.7;
  padding: 0.7rem 0.85rem;
  border-left: 1px solid rgba(196, 168, 130, 0.55);
  background: rgba(242, 235, 224, 0.5);
  transform: rotate(1.5deg);
}

.margin-note:nth-child(even) { transform: rotate(-1.2deg); }

.margin-note.active-note {
  color: var(--burgundy);
  background: rgba(232, 223, 209, 0.85);
  border-left-color: var(--gilt);
}

.appendix {
  max-width: 980px;
  margin: 0 auto;
  background: var(--parchment);
}

.appendix p { color: var(--sienna); }

.appendix-ledger {
  margin-top: 2.2rem;
  border-top: 1px solid rgba(196, 168, 130, 0.4);
  border-bottom: 1px solid rgba(196, 168, 130, 0.4);
}

.appendix-ledger div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(196, 168, 130, 0.25);
}

.appendix-ledger div:last-child { border-bottom: 0; }
.appendix-ledger span { color: var(--gilt); }
.appendix-ledger strong { color: var(--ink); font-weight: 400; }

.colophon {
  min-height: 52vh;
  display: grid;
  place-items: center;
  align-content: center;
  text-align: center;
  background: var(--vellum);
  border-top: 1px solid rgba(196, 168, 130, 0.4);
}

.ornament {
  color: var(--gilt);
  font-size: 1.5rem;
  opacity: 0.65;
  margin-bottom: 1rem;
}

.colophon p {
  margin: 0;
  font-variant: small-caps;
  letter-spacing: 0.12em;
}

.colophon-rule { margin: 1.1rem auto; transform: scaleX(1); opacity: 0.5; }
.colophon small { max-width: 480px; color: var(--sienna); font-family: "JetBrains Mono", monospace; letter-spacing: 0.06em; text-transform: uppercase; font-size: 0.72rem; }

.reveal {
  opacity: 0;
  transform: translateY(30px) scale(0.98);
  transition: opacity 900ms ease-out, transform 900ms ease-out;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.margin-note.reveal { transform: translateY(18px) rotate(2deg); transition-duration: 500ms; }
.margin-note.reveal.in-view { transform: translateY(0) rotate(0deg); }

@keyframes inkReveal { to { opacity: 1; } }
@keyframes fadeIn { to { opacity: 1; } }
@keyframes ruleDraw { to { transform: scaleX(1); } }
@keyframes pulse { 0%, 100% { opacity: 0.4; } 50% { opacity: 0.7; } }

@media (max-width: 1280px) {
  .catalog-shell { grid-template-columns: 1fr; }
  .marginalia { display: none; }
}

@media (max-width: 860px) {
  .contents { flex-direction: column; gap: 0.8rem; }
  .catalog-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .catalog-card, .catalog-card.wide, .catalog-card.tall { grid-column: span 2; min-height: auto; }
  .appendix-ledger div { grid-template-columns: 1fr; gap: 0.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal, .hero-title span, .bookplate, .hero-tagline { opacity: 1; transform: none; }
  .hero-rule { transform: scaleX(1); }
}