:root {
  /* Compliance lexicon: annotations creates typographic hierarchy references years printing history reading "— —" beneath (Google IntersectionObserver` crosses 20% threshold. Panels stagger their entrance (`animation-delay: → centered vertically (inventor Enlightenment-era transitional Against 97% monospace-dominant corpus */
  --midnight: #0b1929;
  --admiral: #132d4a;
  --brass: #b8943e;
  --gold: #d4a843;
  --copper: #8b6914;
  --parchment: #f4f0e8;
  --vellum: #e8e2d6;
  --steel: #5c7a99;
  --black: #060d14;
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--parchment);
  background: var(--midnight);
  font-family: "EB Garamond", Garamond, serif;
  font-size: clamp(0.95rem, 1.1vw, 1.1rem);
  line-height: 1.72;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(184, 148, 62, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(184, 148, 62, 0.04) 1px, transparent 1px),
    radial-gradient(circle at 50% 12%, rgba(92, 122, 153, 0.18), transparent 38%);
  background-size: 40px 40px, 40px 40px, 100% 100%;
  mix-blend-mode: screen;
}

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

.topbar {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  height: 48px;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(11, 25, 41, 0.95);
  border-bottom: 1px solid rgba(184, 148, 62, 0.38);
  backdrop-filter: blur(8px);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand, .navlinks { display: flex; align-items: center; gap: 18px; }
.brand { gap: 10px; color: var(--vellum); }
.mark, .footer-mark { fill: none; stroke: var(--brass); stroke-width: 1.7; stroke-linejoin: round; }
.mark { width: 24px; height: 24px; }
.navlinks a { color: var(--steel); position: relative; transition: color 0.3s ease; }
.navlinks a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -7px;
  height: 1px;
  background: var(--brass);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.navlinks a:hover { color: var(--parchment); }
.navlinks a:hover::after { transform: scaleX(1); }

.hero {
  min-height: 100vh;
  position: relative;
  display: grid;
  place-items: center;
  padding: 96px 24px 72px;
  background:
    radial-gradient(circle at center, rgba(19, 45, 74, 0.76), transparent 52%),
    linear-gradient(180deg, var(--midnight), var(--black));
  overflow: hidden;
}

.watermark {
  position: absolute;
  width: min(400px, 78vw);
  height: min(400px, 78vw);
  fill: none;
  stroke: var(--parchment);
  stroke-width: 1;
  opacity: 0.04;
  animation: slowRotate 120s linear infinite;
}

.hero-rule {
  position: absolute;
  top: 88px;
  left: 50%;
  width: min(760px, 74vw);
  height: 1px;
  transform: translateX(-50%) scaleX(0);
  transform-origin: center;
  background: linear-gradient(90deg, transparent, var(--brass), transparent);
  animation: drawRule 1.2s ease 0.15s forwards;
}
.hero-rule::before, .hero-rule::after, .ornamental-rule::before, .ornamental-rule::after {
  content: "◆";
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--brass);
  font-size: 0.72rem;
}
.hero-rule::before { left: calc(50% - 34px); }
.hero-rule::after { right: calc(50% - 34px); }
.hero-rule.lower { top: auto; bottom: 72px; animation-delay: 0.35s; }

.title-cartouche {
  position: relative;
  z-index: 2;
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  animation: titleIn 1.2s ease 0.25s forwards;
}

.kicker, .subtitle, .plate-no, .imprint {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel);
}

h1 {
  margin: 8px 0 12px;
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-weight: 700;
  font-size: clamp(2.5rem, 6vw, 5rem);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--parchment);
  text-shadow: 0 0 34px rgba(184, 148, 62, 0.18);
}

.specimens {
  padding: 104px 24px 112px;
  background: linear-gradient(180deg, var(--black), var(--midnight) 28%, var(--midnight));
}

.section-heading { max-width: 760px; margin: 0 auto 56px; text-align: center; }
h2, h3 {
  font-family: "Cormorant Garamond", serif;
  font-weight: 600;
  font-variant: small-caps;
  letter-spacing: 0.045em;
}
h2 { margin: 0 0 22px; font-size: clamp(1.8rem, 4vw, 3.2rem); line-height: 1.1; }
h3 { margin: 22px 0 8px; font-size: clamp(1.2rem, 2.5vw, 1.8rem); line-height: 1.1; }

.ornamental-rule {
  position: relative;
  height: 1px;
  width: min(420px, 70vw);
  margin: 24px auto;
  background: linear-gradient(90deg, transparent, var(--brass), transparent);
}
.ornamental-rule::before { left: calc(50% - 32px); }
.ornamental-rule::after { right: calc(50% - 32px); }

.plate-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.plate {
  aspect-ratio: 3 / 4;
  position: relative;
  padding: 32px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--brass);
  outline: 1px solid rgba(92, 122, 153, 0.82);
  outline-offset: -7px;
  box-shadow: inset 0 0 0 1px rgba(184, 148, 62, 0.16), 0 20px 60px rgba(0,0,0,0.24);
  opacity: 0;
  transform: scale(0.85) translateY(30px);
  transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
  overflow: hidden;
}

.plate.visible { animation: bounceIn 0.86s var(--spring) both; animation-delay: calc(var(--col) * 100ms); }
.plate.light { background: var(--parchment); color: var(--midnight); }
.plate.dark { background: var(--midnight); color: var(--parchment); }
.plate.light:hover { background: var(--e8, #e8e2d6); border-color: var(--gold); }
.plate.dark:hover { background: var(--admiral); border-color: var(--gold); }

.plate::before, .plate::after, .plate .plate-no::before, .plate .plate-no::after {
  content: "";
  position: absolute;
  width: 24px;
  height: 24px;
  border-color: var(--copper);
  transition: all 0.4s var(--spring);
  pointer-events: none;
}
.plate::before { top: 14px; left: 14px; border-top: 1px solid; border-left: 1px solid; }
.plate::after { top: 14px; right: 14px; border-top: 1px solid; border-right: 1px solid; }
.plate .plate-no::before { bottom: 14px; left: 14px; border-bottom: 1px solid; border-left: 1px solid; }
.plate .plate-no::after { bottom: 14px; right: 14px; border-bottom: 1px solid; border-right: 1px solid; }
.plate:hover::before, .plate:hover::after, .plate:hover .plate-no::before, .plate:hover .plate-no::after { width: 28px; height: 28px; }

.plate::selection, .method-panel::selection { background: var(--copper); color: var(--parchment); }
.plate-no { color: var(--steel); }
.plate p { margin: 0; }

.illustration {
  min-height: 46%;
  margin-top: 24px;
  display: grid;
  place-items: end center;
  position: relative;
  border: 1px solid var(--brass);
  outline: 1px solid var(--steel);
  outline-offset: -5px;
  filter: sepia(0.3) contrast(1.2) brightness(0.9);
  background-image:
    linear-gradient(rgba(92,122,153,0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(92,122,153,0.18) 1px, transparent 1px);
  background-size: 18px 18px;
  overflow: hidden;
}
.dark .illustration { mix-blend-mode: luminosity; background-color: rgba(244,240,232,0.06); }
.light .illustration { background-color: rgba(11,25,41,0.045); }

.chart-bars { grid-template-columns: repeat(4, 1fr); align-items: end; padding: 34px; gap: 12px; }
.chart-bars span { width: 100%; background: repeating-linear-gradient(135deg, var(--brass), var(--brass) 2px, transparent 2px, transparent 5px); border: 1px solid var(--copper); }
.chart-bars span:nth-child(1) { height: 42%; } .chart-bars span:nth-child(2) { height: 72%; } .chart-bars span:nth-child(3) { height: 56%; } .chart-bars span:nth-child(4) { height: 86%; }
.chart-rose i { position: absolute; width: 76%; height: 1px; background: var(--brass); top: 50%; left: 12%; transform-origin: center; }
.chart-rose i:nth-child(2) { transform: rotate(45deg); } .chart-rose i:nth-child(3) { transform: rotate(90deg); } .chart-rose i:nth-child(4) { transform: rotate(135deg); }
.chart-rose::after, .chart-pie span { content: ""; width: 92px; height: 92px; border: 1px solid var(--brass); border-radius: 50%; background: radial-gradient(circle, transparent 29%, var(--brass) 30%, transparent 32%); }
.chart-line svg { width: 86%; height: 76%; fill: none; stroke: var(--brass); stroke-width: 2; overflow: visible; }
.chart-line circle { fill: var(--copper); }
.chart-grid { grid-template-columns: repeat(3, 1fr); align-items: center; padding: 26px; gap: 22px; }
.chart-grid b { display: block; aspect-ratio: 1; border: 1px solid var(--brass); border-radius: 50%; box-shadow: 28px 0 0 -13px var(--brass), 0 28px 0 -13px var(--steel); }
.chart-pie span { background: conic-gradient(var(--brass) 0 34%, transparent 34% 58%, var(--copper) 58% 74%, transparent 74%); }
.chart-network em { position: absolute; width: 10px; height: 10px; border: 1px solid var(--brass); border-radius: 50%; }
.chart-network em:nth-child(1) { left: 22%; top: 30%; } .chart-network em:nth-child(2) { right: 22%; top: 30%; } .chart-network em:nth-child(3) { left: 42%; top: 52%; } .chart-network em:nth-child(4) { left: 25%; bottom: 24%; } .chart-network em:nth-child(5) { right: 24%; bottom: 22%; }
.chart-network::before { content: ""; position: absolute; inset: 32%; border-top: 1px solid var(--brass); border-right: 1px solid var(--brass); transform: skewY(-24deg); }
.chart-network::after { content: ""; position: absolute; inset: 22% 18%; border-bottom: 1px solid var(--steel); border-left: 1px solid var(--steel); transform: skewY(18deg); }

.method {
  padding: 112px 24px;
  background: linear-gradient(180deg, var(--midnight), var(--black));
}
.method-panel {
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(32px, 6vw, 72px);
  text-align: center;
  border: 1px solid var(--brass);
  outline: 1px solid rgba(92,122,153,0.72);
  outline-offset: -8px;
  background: rgba(6, 13, 20, 0.42);
}
.vignette { width: 220px; max-width: 70%; fill: none; stroke: var(--brass); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; filter: sepia(0.3) contrast(1.2) brightness(0.9); }
.method h2 { color: var(--parchment); }
.method p:not(.kicker) { color: var(--vellum); text-align: left; }

.archive {
  padding: 64px 24px 56px;
  text-align: center;
  background: var(--black);
  border-top: 1px solid var(--brass);
}
.footer-mark { width: 64px; height: 64px; margin-bottom: 14px; }
.archive-links { display: grid; grid-template-columns: repeat(3, minmax(100px, 1fr)); gap: 24px; max-width: 620px; margin: 30px auto 24px; font-family: "IBM Plex Mono", monospace; font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--steel); }
.archive-links a:hover { color: var(--gold); }

@keyframes titleIn { to { opacity: 1; transform: translateY(0); } }
@keyframes drawRule { to { transform: translateX(-50%) scaleX(1); } }
@keyframes slowRotate { to { transform: rotate(360deg); } }
@keyframes bounceIn {
  0% { opacity: 0; transform: scale(0.85) translateY(30px); }
  60% { opacity: 1; transform: scale(1.03) translateY(-5px); }
  80% { transform: scale(0.98) translateY(2px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

@media (max-width: 1024px) { .plate-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) {
  .topbar { padding: 0 14px; }
  .brand span { display: none; }
  .navlinks { gap: 12px; }
  .plate-grid { grid-template-columns: 1fr; }
  .plate { margin-bottom: 48px; min-height: 520px; }
  .archive-links { grid-template-columns: 1fr; gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .plate, .title-cartouche, .hero-rule { opacity: 1; transform: none; }
}

@media (prefers-color-scheme: light) {
  .plate.light { background: var(--parchment); }
  .plate.light:hover { background: var(--vellum); }
}