:root {
  --polished-marble: #F4F2EF;
  --slate-chamber: #2C2F33;
  --graphite: #1E1E24;
  --pewter: #6B6E75;
  --alabaster: #EAEBED;
  --sterling: #A8B5BD;
  --marble-vein: #C4B8A8;
  --facet-flash: #D6DCE1;
  --codex-shadow: #3A3D42;
  --deep-facet: #4A4D53;
  --ease-stone: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Implementation tokens: IntersectionObserver management only. with `threshold: 0.3`. */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--polished-marble);
  color: var(--graphite);
  font-family: "Libre Baskerville", Georgia, serif;
  overflow-x: hidden;
}

.page-shell { position: relative; width: 100%; overflow: hidden; }

.z-panel {
  position: relative;
  min-height: 100vh;
  padding: clamp(6rem, 12vh, 10rem) clamp(1.25rem, 4vw, 4rem);
  isolation: isolate;
}

.panel-light { background: var(--polished-marble); color: var(--graphite); }
.panel-dark { background: var(--slate-chamber); color: var(--alabaster); }

.panel-inner {
  position: relative;
  width: min(1280px, 100%);
  min-height: calc(100vh - clamp(12rem, 24vh, 20rem));
  margin: 0 auto;
  z-index: 2;
}

.marble-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.44;
  background:
    radial-gradient(ellipse at 12% 18%, rgba(255,255,255,0.55), transparent 34%),
    radial-gradient(ellipse at 80% 10%, rgba(168,181,189,0.16), transparent 28%),
    radial-gradient(ellipse at 26% 82%, rgba(196,184,168,0.18), transparent 30%),
    linear-gradient(118deg, transparent 0 38%, rgba(168,181,189,0.10) 39%, transparent 43% 58%, rgba(196,184,168,0.10) 59%, transparent 62%);
  mix-blend-mode: multiply;
  z-index: 0;
}

.diagonal-wash {
  position: absolute;
  inset: 0;
  background: linear-gradient(145deg, transparent 0 32%, rgba(214, 220, 225, 0.05) 50%, transparent 74%);
  z-index: 1;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto 1fr auto;
  gap: 2rem;
}

.mark-block { align-self: start; justify-self: start; }

.hero-mark h1 {
  margin: 0;
  font-family: "Commissioner", Inter, sans-serif;
  font-variation-settings: "FLAR" 50;
  font-size: clamp(4rem, 10vw, 8rem);
  font-weight: 300;
  line-height: 0.82;
  letter-spacing: 0.08em;
  color: var(--graphite);
}

.hero-mark p {
  margin: 1.15rem 0 0 0.42rem;
  font-family: "DM Mono", monospace;
  font-size: 1.5rem;
  letter-spacing: 0.06em;
  color: var(--pewter);
}

.column-wrap {
  position: relative;
  grid-column: 2;
  grid-row: 1 / span 2;
  justify-self: end;
  align-self: start;
  width: min(440px, 46vw);
  margin: -5vh -9vw 0 0;
  filter: drop-shadow(0 28px 50px rgba(30,30,36,0.12));
}

.faceted-column { width: 100%; max-height: 50vh; overflow: visible; }
.facet { transition: fill 0.35s var(--ease-stone), opacity 0.35s var(--ease-stone); }
.shimmer-target:hover .f1, .shimmer-target:hover .f7 { fill: var(--alabaster); }
.shimmer-target:hover .f3, .shimmer-target:hover .f6 { fill: var(--facet-flash); }
.shimmer-target:hover .f8 { fill: var(--marble-vein); }

.hero-descriptor {
  grid-column: 1;
  grid-row: 3;
  align-self: end;
  justify-self: start;
  margin-bottom: 1rem;
}

.hero-descriptor p {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.75;
  font-style: italic;
  color: var(--pewter);
}

.scroll-medallion {
  grid-column: 2;
  grid-row: 3;
  align-self: end;
  justify-self: end;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 1px solid rgba(168,181,189,0.85);
  background:
    radial-gradient(circle at 30% 25%, #EAEBED, #F4F2EF 34%, #D6DCE1 72%, #C4B8A8 100%);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.45), 0 18px 44px rgba(30,30,36,0.08);
  animation: medallionPulse 2.8s ease-in-out infinite;
}

.scroll-medallion span {
  position: absolute;
  left: 50%;
  top: 48%;
  width: 18px;
  height: 18px;
  border-right: 1px solid var(--graphite);
  border-bottom: 1px solid var(--graphite);
  transform: translate(-50%, -50%) rotate(45deg);
}

.reveal-item {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.loaded .reveal-item { opacity: 1; transform: translateY(0); }
.loaded .reveal-item:nth-child(2) { transition-delay: 0.14s; transform: translateY(0); }
.loaded .reveal-item:nth-child(3) { transition-delay: 0.28s; }

.diamond-separator {
  position: relative;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  background: var(--polished-marble);
  z-index: 4;
}

.diamond-separator.on-dark { background: var(--slate-chamber); }
.diamond-separator span {
  width: 8px;
  height: 8px;
  background: var(--marble-vein);
  transform: rotate(45deg);
  opacity: 0.75;
}

.philosophy-grid { min-height: calc(100vh - clamp(12rem, 24vh, 20rem)); }

.philosophy-statement {
  position: absolute;
  top: 0;
  right: 0;
  width: min(45vw, 590px);
}

.philosophy-statement p {
  margin: 0;
  font-family: "Commissioner", Inter, sans-serif;
  font-variation-settings: "FLAR" 50;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: 0.04em;
  color: var(--alabaster);
}

.codex-wrap {
  position: absolute;
  left: 0;
  bottom: 0;
  width: min(520px, 40vw);
  margin: 0;
  filter: drop-shadow(0 30px 50px rgba(0,0,0,0.22));
}
.open-codex { width: 100%; }

.diamond-diagonal {
  position: absolute;
  left: 33%;
  top: 20%;
  width: 37%;
  height: 56%;
  pointer-events: none;
}
.diamond-diagonal i {
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--marble-vein);
  opacity: 0.3;
  transform: rotate(45deg);
}
.diamond-diagonal i:nth-child(1){ left: 94%; top: 0%; }
.diamond-diagonal i:nth-child(2){ left: 82%; top: 12%; }
.diamond-diagonal i:nth-child(3){ left: 70%; top: 24%; }
.diamond-diagonal i:nth-child(4){ left: 58%; top: 36%; }
.diamond-diagonal i:nth-child(5){ left: 46%; top: 48%; }
.diamond-diagonal i:nth-child(6){ left: 34%; top: 60%; }
.diamond-diagonal i:nth-child(7){ left: 22%; top: 72%; }
.diamond-diagonal i:nth-child(8){ left: 10%; top: 84%; }
.diamond-diagonal i:nth-child(9){ left: 0%; top: 96%; }

.slide-left, .slide-right {
  opacity: 0;
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.slide-left { transform: translateX(-40px); }
.slide-right { transform: translateX(40px); }
.in-view .slide-left, .in-view .slide-right { opacity: 1; transform: translateX(0); }

.facets { min-height: 120vh; }
.facets-stage { min-height: 920px; }
.connector-lines { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; }

.capability-card {
  position: absolute;
  z-index: 2;
  width: min(380px, 29vw);
  padding: 1.618rem 1.25rem 1.9rem;
  text-align: center;
  border: 1px solid transparent;
  transition: transform 0.3s var(--ease-stone), box-shadow 0.3s var(--ease-stone), background-color 0.3s var(--ease-stone), border-color 0.3s var(--ease-stone);
}
.capability-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(30,30,36,0.08);
  background-color: rgba(214,220,225,0.15);
  border-color: rgba(168,181,189,0.32);
}
.cap-one { left: 10%; top: 4%; }
.cap-two { left: 38%; top: 36%; }
.cap-three { left: 66%; top: 68%; }
.icon-medallion {
  width: 132px;
  height: 132px;
  margin: 0 auto 1.618rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: radial-gradient(circle, #F4F2EF 0%, #F4F2EF 48%, #D6DCE1 100%);
  box-shadow: inset 0 0 0 1px rgba(168,181,189,0.35);
}
.icon-medallion svg { width: 112px; height: 112px; }
.capability-card h2 {
  margin: 0 0 1rem;
  font-family: "Commissioner", Inter, sans-serif;
  font-variation-settings: "FLAR" 50;
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--graphite);
}
.capability-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--pewter);
}

.seal {
  display: grid;
  place-items: center;
  overflow: hidden;
}
.seal-bar {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 28vh;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(234,235,237,0.08), transparent 36%),
    linear-gradient(110deg, rgba(168,181,189,0.12), rgba(196,184,168,0.08), rgba(168,181,189,0.12));
  border-top: 1px solid rgba(168,181,189,0.22);
}
.seal-frame { position: relative; width: 360px; height: 360px; display: grid; place-items: center; }
.seal-content { position: relative; z-index: 2; text-align: center; }
.seal-content h2 {
  margin: 0 0 1.618rem;
  font-family: "Commissioner", Inter, sans-serif;
  font-variation-settings: "FLAR" 50;
  font-size: 2rem;
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--alabaster);
}
.seal-content a {
  position: relative;
  display: inline-block;
  font-family: "DM Mono", monospace;
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--sterling);
  text-decoration: none;
}
.seal-content a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  height: 1px;
  width: 100%;
  background: var(--marble-vein);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-stone);
}
.seal-content a:hover::after { transform: scaleX(1); }
.seal-content p {
  margin: 1.618rem 0 0;
  font-style: italic;
  font-size: 1rem;
  color: var(--pewter);
}
.diamond-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  transform: rotate(0deg);
  transition: transform 1.5s ease-out;
}
.in-view .diamond-ring { transform: rotate(15deg); }
.diamond-ring i {
  position: absolute;
  left: calc(50% - 3px);
  top: calc(50% - 3px);
  width: 6px;
  height: 6px;
  background: var(--sterling);
  transform-origin: 3px 3px;
}
.diamond-ring i:nth-child(1){ transform: rotate(0deg) translateY(-168px) rotate(45deg); }
.diamond-ring i:nth-child(2){ transform: rotate(30deg) translateY(-168px) rotate(45deg); }
.diamond-ring i:nth-child(3){ transform: rotate(60deg) translateY(-168px) rotate(45deg); }
.diamond-ring i:nth-child(4){ transform: rotate(90deg) translateY(-168px) rotate(45deg); }
.diamond-ring i:nth-child(5){ transform: rotate(120deg) translateY(-168px) rotate(45deg); }
.diamond-ring i:nth-child(6){ transform: rotate(150deg) translateY(-168px) rotate(45deg); }
.diamond-ring i:nth-child(7){ transform: rotate(180deg) translateY(-168px) rotate(45deg); }
.diamond-ring i:nth-child(8){ transform: rotate(210deg) translateY(-168px) rotate(45deg); }
.diamond-ring i:nth-child(9){ transform: rotate(240deg) translateY(-168px) rotate(45deg); }
.diamond-ring i:nth-child(10){ transform: rotate(270deg) translateY(-168px) rotate(45deg); }
.diamond-ring i:nth-child(11){ transform: rotate(300deg) translateY(-168px) rotate(45deg); }
.diamond-ring i:nth-child(12){ transform: rotate(330deg) translateY(-168px) rotate(45deg); }

@keyframes medallionPulse {
  0%, 100% { opacity: 0.72; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.035); }
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .column-wrap { grid-column: 1; grid-row: 2; width: min(360px, 86vw); margin: -1rem -4rem 0 auto; }
  .hero-descriptor { grid-column: 1; grid-row: 3; }
  .scroll-medallion { grid-column: 1; grid-row: 4; margin-top: 2rem; }
  .philosophy-statement { position: relative; width: 100%; margin-left: auto; }
  .codex-wrap { position: relative; width: min(440px, 86vw); margin-top: 5rem; }
  .diamond-diagonal { left: 16%; top: 28%; width: 64%; height: 44%; }
  .facets-stage { min-height: 1180px; }
  .capability-card { width: min(380px, 86vw); left: 50%; transform: translateX(-50%); }
  .capability-card:hover { transform: translateX(-50%) translateY(-6px); }
  .cap-one { top: 0; }
  .cap-two { top: 390px; }
  .cap-three { top: 780px; }
  .connector-lines { display: none; }
}

@media (max-width: 520px) {
  .z-panel { padding-left: 1rem; padding-right: 1rem; }
  .hero-mark h1 { font-size: clamp(3.3rem, 18vw, 5rem); }
  .seal-frame { width: 290px; height: 290px; }
  .diamond-ring i:nth-child(n) { transform: rotate(0deg) translateY(-138px) rotate(45deg); }
}