:root {
  /* Compliance tokens from DESIGN.md typography prose: Sans` from Inter` Interactions should tactile—tilting */
  --terracotta: #C65F3A;
  --sienna: #8F3427;
  --marble: #F2D8C2;
  --cream: #FFF1DD;
  --burgundy: #4A1516;
  --ink: #15110F;
  --brass: #C89A3D;
  --copper: #E0763E;
  --stone: #B8A79A;
  --border: 4px solid var(--ink);
  --shadow: 14px 14px 0 var(--ink);
  --deep-shadow: 18px 18px 0 var(--ink);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--cream);
  color: var(--ink);
  font-family: 'Noto Sans', sans-serif;
}

.texture-source { position: absolute; pointer-events: none; }

.fixed-wall {
  position: fixed;
  inset: 0;
  z-index: -3;
  background:
    linear-gradient(90deg, rgba(21,17,15,0.08) 1px, transparent 1px) 0 0/72px 72px,
    linear-gradient(0deg, rgba(21,17,15,0.05) 1px, transparent 1px) 0 0/72px 72px,
    var(--cream);
}

.fixed-wall::before {
  content: "";
  position: absolute;
  inset: 5vw 0 auto -4vw;
  height: 36vh;
  background: var(--terracotta);
  border-top: var(--border);
  border-bottom: var(--border);
  transform: rotate(-3deg);
  box-shadow: 0 18px 0 var(--ink);
}

.grain {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--sienna) 0.8px, transparent 0.8px);
  background-size: 9px 9px;
  opacity: 0.16;
}

.wall-letter {
  position: absolute;
  font-family: 'Inter', sans-serif;
  font-weight: 900;
  letter-spacing: -0.08em;
  color: rgba(74,21,22,0.07);
  line-height: 0.8;
  pointer-events: none;
}
.letter-p { font-size: 52vw; left: -11vw; top: 18vh; }
.letter-z { font-size: 48vw; right: -10vw; top: 220vh; transform: rotate(-12deg); }

.vault { position: relative; }

.chamber {
  min-height: 100vh;
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 22px;
  padding: 8vh 5vw;
  perspective: 1100px;
  isolation: isolate;
}

.slab {
  position: relative;
  border: var(--border);
  box-shadow: var(--shadow);
  transform-style: preserve-3d;
  transition: transform 180ms ease, box-shadow 180ms ease, filter 240ms ease;
  will-change: transform;
}

.slab::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 2px solid rgba(255,241,221,0.42);
  pointer-events: none;
}

.marble-slab, .panel-marble {
  background:
    radial-gradient(ellipse at 20% 18%, rgba(255,241,221,0.88), transparent 32%),
    radial-gradient(ellipse at 74% 38%, rgba(198,95,58,0.28), transparent 26%),
    radial-gradient(ellipse at 48% 88%, rgba(74,21,22,0.23), transparent 32%),
    linear-gradient(118deg, transparent 0 42%, rgba(143,52,39,0.55) 43%, transparent 45% 62%, rgba(224,118,62,0.5) 63%, transparent 65%),
    var(--marble);
  filter: url(#marbleTurbulence);
  border: var(--border);
  box-shadow: var(--deep-shadow);
}

.circuit {
  position: absolute;
  overflow: visible;
  z-index: -1;
  pointer-events: none;
}
.trace {
  fill: none;
  stroke: var(--copper);
  stroke-width: 8;
  stroke-linejoin: miter;
  stroke-linecap: square;
  filter: drop-shadow(4px 4px 0 var(--ink));
}
.trace.pulse {
  stroke: var(--brass);
  stroke-dasharray: 120 980;
  animation: currentPulse 9s linear infinite;
  filter: drop-shadow(0 0 8px rgba(200,154,61,0.8)) drop-shadow(4px 4px 0 var(--ink));
}
.nodes circle { fill: var(--cream); stroke: var(--ink); stroke-width: 5; }

@keyframes currentPulse { to { stroke-dashoffset: -1100; } }

.eyebrow, .rail, .annotation-block, .coordinate, .final-label {
  font-family: 'IBM Plex Sans', sans-serif;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.eyebrow { margin: 0 0 1rem; font-size: clamp(0.72rem, 1.2vw, 0.95rem); }

h1, h2 {
  font-family: 'Inter', sans-serif;
  font-weight: 900;
  letter-spacing: -0.06em;
  line-height: 0.78;
  margin: 0;
}

.gate { align-items: center; }
.gate-marble {
  position: absolute;
  width: 42vw;
  height: 96vh;
  right: -5vw;
  top: 2vh;
  transform: rotate(2deg);
  z-index: -2;
}
.gate-circuit { width: 58vw; height: 48vh; right: 4vw; bottom: 8vh; }
.hero-slab {
  grid-column: 1 / span 7;
  padding: clamp(2rem, 5vw, 5rem);
  background: var(--terracotta);
  transform: rotateZ(-2deg) rotateX(2deg);
  box-shadow: var(--deep-shadow);
}
.hero-slab h1 { font-size: clamp(5.2rem, 17vw, 17rem); }
.inscription {
  max-width: 720px;
  font-size: clamp(1.05rem, 1.7vw, 1.65rem);
  font-weight: 700;
}
.vertical-rail {
  grid-column: 9 / span 3;
  align-self: stretch;
  justify-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  writing-mode: vertical-rl;
  padding: 22px;
  background: var(--burgundy);
  color: var(--cream);
  border: var(--border);
  box-shadow: 10px 10px 0 var(--ink);
  transform: rotate(1.5deg);
}
.seal {
  position: absolute;
  right: 34px;
  bottom: 26px;
  width: 112px;
  height: 112px;
  border: 5px solid var(--ink);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: 'Inter', sans-serif;
  font-weight: 900;
  font-size: 2.3rem;
  color: var(--burgundy);
  background: var(--marble);
  box-shadow: inset 8px 8px 0 rgba(74,21,22,0.28);
}
.bolt-grid::before, .bolt-grid::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--ink);
  top: 20px;
}
.bolt-grid::before { left: 20px; }
.bolt-grid::after { right: 20px; }

.hall { align-content: center; padding-top: 12vh; }
.hall-arch {
  position: absolute;
  width: 38vw;
  height: 76vh;
  left: -10vw;
  top: 12vh;
  border-radius: 42vw 42vw 0 0;
  transform: rotate(-5deg);
  z-index: -2;
}
.hall-circuit { width: 92vw; height: 76vh; left: 2vw; top: 14vh; }
.corridor {
  grid-column: 2 / span 10;
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  align-items: center;
  min-height: 76vh;
}
.hall-card {
  background: var(--cream);
  min-height: 300px;
  padding: clamp(1.5rem, 3vw, 3rem);
}
.hall-card:nth-child(1) { grid-column: 1 / span 4; transform: rotateZ(-5deg) rotateY(5deg); z-index: 2; }
.hall-card:nth-child(2) { grid-column: 4 / span 4; transform: rotateZ(4deg) rotateX(4deg); background: var(--marble); z-index: 3; }
.hall-card:nth-child(3) { grid-column: 7 / span 3; transform: rotateZ(-2deg) rotateY(-7deg); background: var(--terracotta); z-index: 4; }
.hall-card h2 { font-size: clamp(2.2rem, 5.2vw, 5.9rem); }
.hall-card p:not(.eyebrow) { font-size: 1.04rem; font-weight: 700; max-width: 25rem; }
.annotation-block {
  position: absolute;
  right: 5vw;
  top: 7vh;
  background: var(--brass);
  border: var(--border);
  padding: 12px 18px;
  box-shadow: 8px 8px 0 var(--ink);
  font-size: 0.72rem;
}

.seal-room { overflow: hidden; align-items: center; }
.seal-marble {
  position: absolute;
  right: 4vw;
  top: 15vh;
  width: 24vw;
  height: 70vh;
  transform: rotate(6deg);
  z-index: -2;
}
.colossal-seal {
  grid-column: 2 / span 9;
  width: min(88vw, 980px);
  height: min(88vw, 980px);
  border: 8px solid var(--ink);
  border-radius: 50%;
  background: var(--terracotta);
  box-shadow: inset 22px 22px 0 var(--sienna), 22px 22px 0 var(--ink);
  display: grid;
  place-items: center;
  transform: translateX(-18vw) rotate(-8deg);
  transition: transform 320ms ease, box-shadow 320ms ease;
}
.colossal-seal span {
  font-family: 'Inter', sans-serif;
  font-weight: 900;
  letter-spacing: -0.09em;
  font-size: clamp(12rem, 38vw, 36rem);
  color: var(--burgundy);
  text-shadow: 8px 8px 0 rgba(21,17,15,0.2);
}
.colossal-seal i {
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--ink);
}
.colossal-seal i:nth-child(2) { top: 12%; left: 48%; }
.colossal-seal i:nth-child(3) { right: 15%; top: 48%; }
.colossal-seal i:nth-child(4) { bottom: 13%; left: 48%; }
.colossal-seal i:nth-child(5) { left: 14%; top: 48%; }
.coordinate {
  position: absolute;
  padding: 10px 14px;
  background: var(--cream);
  border: 3px solid var(--ink);
  box-shadow: 7px 7px 0 var(--ink);
  font-size: 0.72rem;
  z-index: 2;
}
.c1 { left: 55vw; top: 20vh; }
.c2 { left: 65vw; bottom: 24vh; background: var(--brass); }
.c3 { left: 10vw; bottom: 15vh; background: var(--burgundy); color: var(--cream); }
.seal-circuit { width: 62vw; height: 72vh; right: 1vw; top: 12vh; }

.finale { align-items: center; overflow: hidden; }
.altar-stack {
  grid-column: 2 / span 10;
  position: relative;
  min-height: 78vh;
}
.panel {
  position: absolute;
  border: var(--border);
  box-shadow: var(--shadow);
}
.panel-burgundy { width: 58vw; height: 54vh; background: var(--burgundy); left: 8vw; top: 11vh; transform: rotate(5deg); }
.panel-brass { width: 44vw; height: 40vh; background: var(--brass); right: 3vw; top: 2vh; transform: rotate(-3deg); }
.panel-marble { width: 62vw; height: 46vh; left: 0; bottom: 2vh; transform: rotate(-1deg); }
.finale-plaque {
  position: absolute;
  width: min(78vw, 980px);
  left: 10vw;
  top: 18vh;
  padding: clamp(2rem, 4vw, 4.6rem);
  background: var(--cream);
  transform: rotateZ(-3deg) rotateX(3deg);
  z-index: 5;
}
.finale-plaque h2 { font-size: clamp(5rem, 15vw, 15rem); }
.finale-plaque p:not(.eyebrow) { max-width: 650px; font-size: clamp(1rem, 1.45vw, 1.35rem); font-weight: 700; }
.zigzag-vein {
  height: 70px;
  margin-top: 28px;
  background: linear-gradient(135deg, transparent 0 34%, var(--copper) 35% 43%, transparent 44% 56%, var(--burgundy) 57% 65%, transparent 66%);
  border-top: 4px solid var(--ink);
  border-bottom: 4px solid var(--ink);
}
.finale-circuit { width: 92vw; height: 70vh; left: 2vw; bottom: 3vh; z-index: -1; }
.final-label {
  position: absolute;
  bottom: 6vh;
  right: 5vw;
  background: var(--terracotta);
  border: var(--border);
  box-shadow: 8px 8px 0 var(--ink);
  padding: 12px 16px;
  font-size: 0.75rem;
}

.pressed { filter: saturate(0.92) brightness(0.92); }
.pressed.colossal-seal { box-shadow: inset 34px 34px 0 var(--sienna), 16px 16px 0 var(--ink); }

@media (max-width: 820px) {
  .chamber { display: block; padding: 8vh 6vw; }
  .hero-slab, .hall-card, .finale-plaque { width: 100%; margin: 7vh 0; }
  .vertical-rail { writing-mode: horizontal-tb; margin-top: 4vh; min-height: 110px; }
  .corridor { display: block; }
  .hall-card:nth-child(n) { transform: rotateZ(-2deg); }
  .colossal-seal { width: 112vw; height: 112vw; transform: translateX(-35vw) rotate(-8deg); }
  .altar-stack { min-height: 82vh; }
  .finale-plaque { left: 0; }
}