:root {
  --raw-umber: #3B2F2F;
  --desert-sand: #C4A882;
  --burnt-sienna: #1E1614;
  --ochre-blaze: #D4863A;
  --sage-dust: #7A8B6F;
  --parchment: #EDE4D3;
  --clay-gray: #9B8E7E;
  --terracotta: #C0533A;
  --edge-light: #5A4A42;
  --skew: 7deg;
  --raised: 8px 8px 16px #1E1614, -8px -8px 16px #5A4A42;
  --raised-hover: 11px 11px 21px #1E1614, -11px -11px 21px #5A4A42, 0 0 20px rgba(212, 134, 58, 0.15);
  --depressed: inset 8px 8px 16px #1E1614, inset -8px -8px 16px #5A4A42;
}

/* Design trace: Interaction States:** Interaction:** Particles within 120px of the cursor gently accelerate away (repulsion force Interactive elements IntersectionObserver` callbacks that interpolate polygon coordinates over 800ms with `cubic-bezier(0.33 JetBrains Mono at 10% opacity JetBrains Mono" (Google Fonts Source Serif 4 preloaded via `<link rel="preload">` Source Serif 4" (Google Fonts */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--burnt-sienna);
  color: var(--parchment);
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  line-height: 1.7;
  letter-spacing: 0.005em;
  overflow-x: hidden;
}

#mineral-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 10;
  will-change: transform;
}

.descent { position: relative; overflow: hidden; background: var(--raw-umber); }

.layer, .stratum, .fault-line {
  position: relative;
  min-height: 100vh;
  isolation: isolate;
}

.surface {
  display: grid;
  place-items: center;
  min-height: 100vh;
  background:
    radial-gradient(circle at 22% 18%, rgba(196, 168, 130, 0.08), transparent 30%),
    radial-gradient(circle at 78% 84%, rgba(122, 139, 111, 0.08), transparent 34%),
    var(--raw-umber);
}

.surface-texture,
.bedrock-grain,
.stratum::before,
.fault-line::before {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  opacity: 0.5;
  background-image:
    repeating-linear-gradient(83deg, transparent 0 34px, rgba(155, 142, 126, 0.16) 35px, transparent 36px, transparent 90px),
    repeating-linear-gradient(83deg, transparent 0 55px, rgba(237, 228, 211, 0.06) 56px, transparent 57px, transparent 146px);
}

.plateau {
  width: min(760px, calc(100vw - 40px));
  min-height: 330px;
  padding: clamp(2rem, 6vw, 4.5rem);
  display: grid;
  place-items: center;
  text-align: center;
  background: var(--raw-umber);
  border-radius: 32px;
  position: relative;
}

.neo-raised { box-shadow: var(--raised); }
.neo-depressed { box-shadow: var(--depressed); }

.interactive-press {
  transition: box-shadow 300ms ease, transform 200ms ease, font-variation-settings 300ms ease;
  cursor: default;
}

.interactive-press:hover { box-shadow: var(--raised-hover); }
.neo-depressed.interactive-press:hover { box-shadow: var(--depressed), 0 0 20px rgba(212, 134, 58, 0.15); }
.interactive-press:active { transform: translateY(2px); box-shadow: var(--depressed); }
.interactive-press:focus { outline: 2px solid var(--ochre-blaze); outline-offset: 4px; }

.brand-content h1,
.mass-headline {
  font-family: "Commissioner", system-ui, sans-serif;
  font-weight: 800;
  font-variation-settings: "wght" 300;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0;
}

.brand-content h1 {
  font-size: clamp(4rem, 13vw, 9rem);
  color: var(--parchment);
  text-shadow: 0 12px 30px rgba(30, 22, 20, 0.45);
}

.tagline {
  min-height: 1.7em;
  margin: 1rem 0 0;
  color: var(--desert-sand);
  font-size: clamp(1.2rem, 2.2vw, 1.65rem);
}

.mono-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(155, 142, 126, 0.82);
  margin: 0 0 1rem;
}

.stratum {
  margin-top: -10vh;
  padding: 18vh 0;
  transform: skewY(calc(var(--skew) * -1));
  transform-origin: top left;
  clip-path: polygon(0 0, 0 0, 0 100%, 0 100%);
  transition: clip-path 800ms cubic-bezier(0.33, 0, 0.2, 1);
  will-change: clip-path;
}

.stratum.revealed { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); }

.stratum-inner {
  width: min(1280px, calc(100% - 64px));
  margin: 0 auto;
  position: relative;
  transform: skewY(var(--skew));
  z-index: 2;
}

.stratum-one { background: linear-gradient(145deg, #3B2F2F, #4a3b36 52%, #3B2F2F); }
.deep-stratum { background: linear-gradient(145deg, #2a201d, #3B2F2F 42%, #1E1614); transform: skewY(var(--skew)); transform-origin: top right; min-height: 150vh; }
.deep-stratum .stratum-inner { transform: skewY(calc(var(--skew) * -1)); }

.intro-copy { max-width: 820px; margin-bottom: 4rem; }
.mass-headline { font-size: clamp(2.5rem, 6vw, 5.5rem); color: var(--parchment); }
.revealed .mass-headline, .surface.ready h1, .bedrock.ready .mass-headline { font-variation-settings: "wght" 750; transition: font-variation-settings 600ms ease-out; }

.outcrop-cascade {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 32px;
  align-items: start;
}

.outcrop {
  grid-column: span 4;
  min-height: 420px;
  padding: 2rem;
  border-radius: 28px;
  background: var(--raw-umber);
}

.outcrop:nth-child(2) { margin-top: 72px; }
.outcrop:nth-child(3) { margin-top: 144px; }
.outcrop h3, .channel h3 {
  font-family: "Commissioner", system-ui, sans-serif;
  font-size: clamp(1.25rem, 2.5vw, 2rem);
  font-weight: 650;
  margin: 1.5rem 0 0.6rem;
  color: var(--desert-sand);
}
.outcrop:hover h3, .channel:hover h3 { font-variation-settings: "wght" 700; color: var(--ochre-blaze); }
.outcrop p, .channel p { margin: 0; color: var(--clay-gray); }

.fossil-icon, .diagram {
  border-radius: 24px;
  background: rgba(30, 22, 20, 0.28);
  box-shadow: inset 5px 5px 12px rgba(30, 22, 20, 0.8), inset -5px -5px 12px rgba(90, 74, 66, 0.8);
  display: grid;
  place-items: center;
}

.fossil-icon { width: 140px; height: 140px; }
.fossil-icon svg, .diagram svg { width: 82%; height: 82%; fill: none; stroke: var(--parchment); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.fossil-icon circle, .diagram circle { fill: var(--ochre-blaze); stroke: var(--terracotta); }

.fault-line {
  min-height: 55vh;
  margin-top: -10vh;
  padding: 14vh 0 12vh;
  background: linear-gradient(97deg, #1E1614 0 22%, #C0533A 22% 24%, #3B2F2F 24% 76%, #D4863A 76% 78%, #1E1614 78%);
  clip-path: polygon(0 10%, 100% 0, 100% 90%, 0 100%);
  display: grid;
  place-items: center;
  overflow: hidden;
}
.fault-line .stratum-inner { transform: none; }
.fault-dust span {
  position: absolute;
  width: var(--size);
  height: var(--size);
  left: var(--x);
  top: var(--y);
  border-radius: 50%;
  background: var(--color);
  opacity: 0.65;
  animation: faultFloat var(--duration) ease-in-out infinite;
}

.channels { display: grid; gap: 36px; margin-top: 4rem; }
.channel {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 36px;
  align-items: center;
  padding: clamp(1.4rem, 4vw, 3rem);
  background: #2d2422;
  border-radius: 32px;
}
.diagram { min-height: 220px; background: linear-gradient(145deg, rgba(59, 47, 47, 0.7), rgba(30, 22, 20, 0.7)); }
.delta svg path:nth-child(2), .roots svg path:nth-child(3), .sprout svg path:nth-child(5) { stroke: var(--sage-dust); }
.delta svg path:nth-child(4), .roots svg path:nth-child(5), .sprout svg path:nth-child(4) { stroke: var(--ochre-blaze); }

.bedrock {
  min-height: 100vh;
  margin-top: -10vh;
  display: grid;
  place-items: center;
  padding: 12vh 32px;
  background:
    radial-gradient(circle at 50% 110%, rgba(212, 134, 58, 0.12), transparent 45%),
    linear-gradient(180deg, #2b201e, var(--burnt-sienna));
}
.bedrock-content { width: min(980px, 100%); text-align: center; position: relative; z-index: 2; }
.contact-slab {
  display: grid;
  gap: 0.7rem;
  margin: 3rem auto 0;
  width: min(680px, 100%);
  padding: clamp(1.8rem, 5vw, 3rem);
  border-radius: 28px;
  color: var(--parchment);
  text-decoration: none;
  background: #221917;
}
.contact-slab span { font-family: "Commissioner", system-ui, sans-serif; font-size: clamp(2rem, 6vw, 4.5rem); font-weight: 750; letter-spacing: -0.03em; }
.contact-slab small { color: var(--clay-gray); font-size: 1rem; }

.depth-label {
  position: absolute;
  left: clamp(0.7rem, 2vw, 1.4rem);
  top: 50%;
  transform: rotate(-90deg) translateX(-50%);
  transform-origin: left top;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  color: rgba(155, 142, 126, 0.18);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  z-index: 3;
}

.section-skeleton { position: absolute; inset: 18vh 32px auto; z-index: 4; display: grid; gap: 28px; opacity: 1; transition: opacity 300ms ease; }
.surface .section-skeleton { display: none; }
.skeleton {
  border-radius: 24px;
  min-height: 64px;
  background: linear-gradient(100deg, rgba(196, 168, 130, 0.08) 0%, rgba(196, 168, 130, 0.18) 45%, rgba(196, 168, 130, 0.08) 80%) var(--raw-umber);
  background-size: 260% 100%;
  box-shadow: 4px 4px 8px rgba(30, 22, 20, 0.72), -4px -4px 8px rgba(90, 74, 66, 0.5);
  animation: excavate 2.5s ease-in-out infinite;
}
.skeleton-wordmark { position: absolute; width: 72%; height: 104px; }
.skeleton-line.wide { width: min(780px, 80vw); height: 120px; }
.skeleton-line.statement { width: min(980px, 84vw); height: 160px; }
.skeleton-tile { width: min(360px, 70vw); height: 260px; }
.skeleton-tile.short { height: 180px; margin-left: min(420px, 20vw); }
.skeleton-channel { width: min(1060px, 80vw); height: 260px; }
.skeleton-contact { width: min(680px, 86vw); height: 190px; margin: 0 auto; }
.content-hidden { opacity: 0; transition: opacity 300ms ease; }
.ready .content-hidden, .revealed.ready .content-hidden { opacity: 1; }
.ready .section-skeleton, .ready .skeleton-wordmark { opacity: 0; pointer-events: none; }

@keyframes excavate { 0%, 100% { background-position: 120% 0; } 50% { background-position: -80% 0; } }
@keyframes faultFloat { 0%, 100% { transform: translateY(20px) translateX(-8px); } 50% { transform: translateY(-42px) translateX(12px); } }

@media (max-width: 1024px) {
  :root { --skew: 5deg; }
  .stratum-inner { width: min(960px, calc(100% - 44px)); }
  .outcrop { grid-column: span 8; }
  .outcrop:nth-child(2), .outcrop:nth-child(3) { margin-top: 0; margin-left: 8vw; }
  .channel { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
  :root { --skew: 4deg; --raised: 5px 5px 10px #1E1614, -5px -5px 10px #5A4A42; --depressed: inset 5px 5px 10px #1E1614, inset -5px -5px 10px #5A4A42; }
  .plateau { min-height: 280px; border-radius: 24px; }
  .stratum { padding: 14vh 0; }
  .stratum-inner { width: calc(100% - 32px); }
  .outcrop-cascade { display: grid; grid-template-columns: repeat(4, 1fr); }
  .outcrop { grid-column: 1 / -1; min-height: auto; }
  .outcrop:nth-child(2), .outcrop:nth-child(3) { margin-left: 0; }
  .fossil-icon { width: 112px; height: 112px; }
  .fault-line { min-height: 65vh; }
  .channel { padding: 1.2rem; border-radius: 24px; gap: 18px; }
  .diagram { min-height: 160px; }
  .depth-label { display: none; }
}