/* Design trace: Fira Code snippets showing Rust's zero-cost abstractions appear with a typewriter-style reveal (30ms per character); Fira Code" (Google Fonts; Interactions* Interactions:** IntersectionObserver` for all scroll-triggered events (no scroll listeners; IntersectionObserver` with `threshold: 0.15`; Space Grotesk body text with Fira Code inline snippets; orchid (#e8a0ff */

:root {
  --void-ground: #0b0c2a;
  --amethyst-core: #7b2d8e;
  --sapphire-edge: #1a3a6e;
  --emerald-signal: #1e6b4e;
  --ruby-alert: #8b1a2b;
  --topaz-glow: #c8922a;
  --chrome-surface: #d0d0e8;
  --lavender-silver: #c8b8d4;
  --orchid-light: #e8a0ff;
  --chrome-gradient: linear-gradient(135deg, #c0c0c0, #ffffff, #a0a0a0, #e0e0e0);
  --bezel-gradient: linear-gradient(135deg, #60608a, #d0d0e8, #60608a);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100%;
  overflow-x: hidden;
  background: var(--void-ground);
  color: var(--lavender-silver);
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: clamp(0.95rem, 1.2vw, 1.15rem);
  line-height: 1.65;
  letter-spacing: 0.01em;
}

.quest-shell {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 20% 0%, #7b2d8e16 0%, transparent 35%),
    radial-gradient(ellipse at 90% 35%, #1a3a6e22 0%, transparent 36%),
    var(--void-ground);
}

.quest-section {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: clamp(4rem, 8vw, 8rem) clamp(1.5rem, 5vw, 5rem);
  clip-path: polygon(0 8vw, 100% 0, 100% calc(100% - 8vw), 0 100%);
}

.quest-section:nth-of-type(even) {
  clip-path: polygon(0 0, 100% 8vw, 100% 100%, 0 calc(100% - 8vw));
}

.entry-vault {
  min-height: 100vh;
  padding: 0;
  clip-path: none;
  background: var(--void-ground);
}

.ownership-chamber { min-height: 120vh; }
.type-forge { min-height: 100vh; }
.memory-cathedral { min-height: 110vh; }
.exit-portal { min-height: 60vh; }

.section-inner {
  position: relative;
  z-index: 3;
  width: min(1120px, 100%);
}

.diagonal-line,
.section-cut {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  opacity: 0;
}

.diagonal-line::before,
.section-cut::before {
  content: "";
  position: absolute;
  left: -15%;
  top: 50%;
  width: 130%;
  height: 2px;
  background: var(--bezel-gradient);
  box-shadow: 0 0 18px #d0d0e855, 0 0 34px #7b2d8e30;
  transform: rotate(12deg) scaleX(0);
  transform-origin: left center;
}

.section-cut::before {
  top: 8%;
  transform: rotate(-6deg) scaleX(0);
}

.section-cut.reverse::before { transform: rotate(7deg) scaleX(0); }
.cathedral-cut::before { top: 11%; transform: rotate(-12deg) scaleX(0); }

.entry-vault.booted .diagonal-line,
.quest-section.in-view .section-cut {
  opacity: 1;
}

.entry-vault.booted .diagonal-line::before,
.quest-section.in-view .section-cut::before {
  animation: lineDraw 800ms cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes lineDraw {
  to { transform: rotate(12deg) scaleX(1); }
}

.quest-section.in-view .section-cut.reverse::before { animation-name: lineDrawReverse; }
.quest-section.in-view .cathedral-cut::before { animation-name: cathedralLineDraw; }

@keyframes lineDrawReverse {
  to { transform: rotate(7deg) scaleX(1); }
}

@keyframes cathedralLineDraw {
  to { transform: rotate(-12deg) scaleX(1); }
}

.hero-mesh {
  position: absolute;
  inset: 0;
  opacity: 0;
  clip-path: polygon(0 58%, 100% 32%, 100% 100%, 0 100%);
  background:
    radial-gradient(ellipse at 30% 40%, #7b2d8e33 0%, transparent 50%),
    radial-gradient(ellipse at 70% 60%, #1a3a6e44 0%, transparent 40%),
    radial-gradient(ellipse at 50% 80%, #8b1a2b22 0%, transparent 60%),
    conic-gradient(from 230deg at 60% 70%, #0b0c2a, #3d1f5e, #1a3a6e, #7b2d8e, #0b0c2a);
  background-size: 130% 130%, 120% 120%, 150% 150%, 100% 100%;
  animation: heroMeshDrift 12s ease-in-out infinite;
}

.entry-vault.booted .hero-mesh {
  animation: meshAppear 600ms 950ms ease forwards, heroMeshDrift 12s 950ms ease-in-out infinite;
}

@keyframes meshAppear { to { opacity: 1; } }
@keyframes heroMeshDrift {
  0%, 100% { background-position: 0% 0%, 0% 0%, 0% 0%, center; }
  50% { background-position: 14% 9%, -11% 12%, 8% -8%, center; }
}

.oxidation,
.oxidation::after {
  position: absolute;
  inset: 0;
  content: "";
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180' viewBox='0 0 180 180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
  mix-blend-mode: screen;
  pointer-events: none;
}

.hero-lockup {
  position: relative;
  z-index: 5;
  display: grid;
  place-items: center;
  transform: rotate(12deg) translateY(-1vw);
}

.hero-title,
.section-title,
.flip-card h3 {
  font-family: "Bebas Neue", Impact, sans-serif;
  font-weight: 400;
  letter-spacing: 0.15em;
  line-height: 0.88;
  background: var(--chrome-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-transform: uppercase;
  text-shadow: 0 0 18px #d0d0e820;
}

.hero-title {
  min-height: 0.9em;
  font-size: clamp(3.5rem, 10vw, 9rem);
  filter: drop-shadow(0 0 24px #7b2d8e55);
}

.hero-title .letter {
  opacity: 0;
  display: inline-block;
  transform: translateY(0.35em) skewX(-12deg);
  animation: letterBoot 320ms forwards;
}

@keyframes letterBoot {
  to { opacity: 1; transform: translateY(0) skewX(0); }
}

.section-title {
  margin-bottom: clamp(2rem, 5vw, 4rem);
  font-size: clamp(2rem, 5vw, 4.5rem);
}

.system-kicker,
.code-label,
code {
  font-family: "Fira Code", "SFMono-Regular", monospace;
}

.system-kicker {
  margin-bottom: 0.8rem;
  color: #e8a0ff;
  font-size: clamp(0.75rem, 1vw, 0.95rem);
  letter-spacing: 0.14em;
  text-transform: lowercase;
}

.code-label {
  margin-top: 1.3rem;
  color: #e8a0ff;
  font-size: clamp(0.85rem, 1vw, 1rem);
  opacity: 0;
}

.entry-vault.booted .code-label {
  animation: labelFade 500ms 1450ms forwards;
}

@keyframes labelFade { to { opacity: 1; } }

.cursor {
  display: inline-block;
  width: 0.55em;
  height: 1.05em;
  margin-left: 0.25em;
  background: #e8a0ff;
  vertical-align: -0.15em;
  animation: cursorBlink 720ms steps(2, start) infinite;
}

@keyframes cursorBlink { 50% { opacity: 0; } }

.grid-plane {
  position: absolute;
  inset: -15%;
  opacity: 0;
  transform: perspective(800px) rotateX(2deg) rotateZ(-12deg);
  background-image:
    linear-gradient(#d0d0e830 1px, transparent 1px),
    linear-gradient(90deg, #d0d0e830 1px, transparent 1px),
    linear-gradient(#d0d0e815 1px, transparent 1px),
    linear-gradient(90deg, #d0d0e815 1px, transparent 1px);
  background-size: 160px 160px, 160px 160px, 40px 40px, 40px 40px;
  transition: opacity 800ms ease;
}

.quest-section.in-view .grid-plane { opacity: 0.34; }

.ownership-chamber::before,
.type-forge::before,
.memory-cathedral::before,
.exit-portal::before {
  content: "";
  position: absolute;
  inset: -8%;
  opacity: 0.95;
  background-size: 130% 130%, 120% 120%, 150% 150%;
  animation: meshDrift 11s ease-in-out infinite;
}

.ownership-chamber::before {
  background:
    radial-gradient(ellipse at 34% 48%, #7b2d8e33 0%, transparent 48%),
    radial-gradient(ellipse at 67% 38%, #1e6b4e28 0%, transparent 43%),
    radial-gradient(ellipse at 42% 78%, #1a3a6e38 0%, transparent 55%),
    var(--void-ground);
}

.type-forge::before {
  background:
    radial-gradient(ellipse at 50% 50%, #c8922a24 0%, transparent 52%),
    radial-gradient(ellipse at 72% 30%, #8b1a2b22 0%, transparent 45%),
    radial-gradient(ellipse at 25% 72%, #7b2d8e2a 0%, transparent 54%),
    var(--void-ground);
}

.memory-cathedral::before {
  background:
    radial-gradient(ellipse at 25% 45%, #7b2d8e40 0%, transparent 50%),
    radial-gradient(ellipse at 75% 55%, #1a3a6e33 0%, transparent 50%),
    radial-gradient(ellipse at 50% 75%, #1e6b4e26 0%, transparent 50%),
    radial-gradient(ellipse at 35% 25%, #c8922a26 0%, transparent 45%),
    radial-gradient(ellipse at 65% 70%, #8b1a2b26 0%, transparent 45%),
    var(--void-ground);
  animation-duration: 20s;
}

.exit-portal::before {
  background:
    radial-gradient(ellipse at 18% 44%, #7b2d8e08 0%, transparent 45%),
    radial-gradient(ellipse at 80% 35%, #1a3a6e08 0%, transparent 45%),
    radial-gradient(circle at 50% 72%, #e8a0ff18 0%, transparent 28%),
    var(--void-ground);
}

@keyframes meshDrift {
  0%, 100% { background-position: 0% 0%, 0% 0%, 0% 0%; }
  50% { background-position: 12% 8%, -10% 13%, 9% -8%; }
}

.diagonal-descend {
  transform: rotate(-4deg);
}

.diagonal-descend > * {
  transform: rotate(4deg);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1rem, 3vw, 2.5rem);
  align-items: start;
}

.flip-card {
  height: clamp(310px, 34vw, 390px);
  perspective: 1200px;
  cursor: pointer;
  opacity: 0;
  transform: translateY(42px) rotate(-3deg);
  transition: opacity 500ms ease, transform 500ms cubic-bezier(0.4, 0, 0.2, 1), filter 250ms ease;
  will-change: transform;
}

.quest-section.in-view .flip-card {
  opacity: 1;
  transform: translateY(0) rotate(-3deg);
}

.quest-section.in-view .flip-card:nth-child(2) {
  transform: translateY(52px) rotate(2deg);
  transition-delay: 200ms;
}

.quest-section.in-view .flip-card:nth-child(3) {
  transform: translateY(104px) rotate(-2deg);
  transition-delay: 400ms;
}

.flip-card:hover,
.flip-card.lifting {
  filter: drop-shadow(0 0 22px #7b2d8e55);
}

.card-stage {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

.flip-card.lifting .card-stage { transform: translateY(-8px) scale(1.03); }
.flip-card.flipped .card-stage { transform: rotateY(180deg); }
.flip-card.flipped.lifting .card-stage { transform: translateY(-8px) scale(1.03) rotateY(180deg); }

.card-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: clamp(1.2rem, 2.4vw, 2rem);
  overflow: hidden;
  backface-visibility: hidden;
  border: 1px solid transparent;
  border-image: var(--bezel-gradient) 1;
  background:
    linear-gradient(140deg, #d0d0e80d, transparent 35%),
    rgba(11, 12, 42, 0.72);
  box-shadow: inset 0 0 28px #1a3a6e22, 0 0 0 #7b2d8e00;
  backdrop-filter: blur(14px);
}

.card-face::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  background: linear-gradient(100deg, transparent 35%, #d0d0e8cc 50%, transparent 65%);
  transform: translateX(-120%);
}

.flip-card.flipping .card-face::after {
  animation: chromeGlint 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes chromeGlint {
  45% { opacity: 0; transform: translateX(-120%); }
  50% { opacity: 0.45; }
  60% { opacity: 0; transform: translateX(120%); }
}

.card-back {
  transform: rotateY(180deg);
  background:
    radial-gradient(ellipse at 30% 30%, #7b2d8e22 0%, transparent 52%),
    rgba(11, 12, 42, 0.88);
}

.flip-card.explored .card-face {
  box-shadow: 0 0 20px #7b2d8e40, inset 0 0 8px #1a3a6e20;
}

.flip-card h3 {
  position: relative;
  z-index: 2;
  font-size: clamp(2rem, 3vw, 3.1rem);
}

.front-rune {
  position: relative;
  z-index: 2;
  color: #c8b8d4;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
}

.card-back p {
  position: relative;
  z-index: 2;
  max-width: 29ch;
  text-align: center;
}

code {
  position: relative;
  z-index: 2;
  display: inline-block;
  max-width: 100%;
  padding: 0.8rem 1rem;
  overflow-wrap: anywhere;
  border: 1px solid #3d1f5e;
  background: rgba(11, 12, 42, 0.85);
  color: #e8a0ff;
  font-size: clamp(0.85rem, 1vw, 1rem);
  box-shadow: inset 0 0 18px #7b2d8e18;
}

.mini-mesh {
  position: relative;
  z-index: 2;
  width: min(160px, 46%);
  aspect-ratio: 1;
  border-radius: 32% 68% 54% 46%;
  border: 1px solid #d0d0e855;
  background-size: 150% 150%;
  animation: miniMesh 8s ease-in-out infinite;
  box-shadow: inset 0 0 26px #ffffff14, 0 0 28px #7b2d8e35;
}

.ownership-mesh { background: radial-gradient(circle at 30% 40%, #7b2d8e99, transparent 48%), radial-gradient(circle at 70% 70%, #c8922a66, transparent 45%), #0b0c2a; }
.borrowing-mesh { background: radial-gradient(circle at 35% 35%, #1e6b4e99, transparent 50%), radial-gradient(circle at 72% 58%, #1a3a6e88, transparent 45%), #0b0c2a; }
.lifetime-mesh { background: radial-gradient(circle at 40% 35%, #e8a0ff77, transparent 46%), radial-gradient(circle at 70% 72%, #8b1a2b77, transparent 42%), #0b0c2a; }

@keyframes miniMesh {
  0%, 100% { background-position: 0% 0%; transform: rotate(0deg) scale(1); }
  50% { background-position: 100% 80%; transform: rotate(8deg) scale(1.08); }
}

.forge-panel {
  transform: rotate(4deg);
}

.forge-panel > * { transform: rotate(-4deg); }

.type-machine {
  position: relative;
  min-height: 500px;
  display: grid;
  align-items: center;
  padding: clamp(1rem, 4vw, 3rem);
  border: 2px solid transparent;
  border-image: var(--bezel-gradient) 1;
  background: rgba(11, 12, 42, 0.58);
  box-shadow: 0 0 40px #1a3a6e24, inset 0 0 48px #7b2d8e18;
}

.node-web {
  width: 100%;
  overflow: visible;
  filter: drop-shadow(0 0 12px #7b2d8e40);
}

.web-line {
  fill: none;
  stroke: url(#chromeStroke);
  stroke-width: 2;
  stroke-dasharray: 12 9;
  animation: webFlow 5s linear infinite;
}

.web-line.alt { stroke: #1e6b4e; opacity: 0.75; animation-duration: 7s; }
.web-line.danger { stroke: #8b1a2b; opacity: 0.6; animation-duration: 6s; }

@keyframes webFlow { to { stroke-dashoffset: -84; } }

.nodes circle {
  fill: rgba(11, 12, 42, 0.82);
  stroke: #d0d0e8;
  stroke-width: 2;
  cursor: pointer;
  transition: fill 220ms ease, stroke 220ms ease, filter 220ms ease, r 220ms ease;
}

.nodes circle:hover,
.nodes circle.active {
  fill: #7b2d8e;
  stroke: #e8a0ff;
  filter: drop-shadow(0 0 16px #e8a0ff88);
  r: 31px;
}

.type-readout {
  justify-self: end;
  width: min(520px, 100%);
  margin-top: -3rem;
  color: #c8b8d4;
}

.type-readout p { margin-top: 1rem; }

.cathedral-mesh {
  position: absolute;
  inset: 5% 18%;
  opacity: 0.72;
  clip-path: polygon(47% 0, 67% 0, 100% 100%, 0 100%);
  background:
    radial-gradient(ellipse at 25% 45%, #7b2d8e40 0%, transparent 50%),
    radial-gradient(ellipse at 75% 55%, #1a3a6e33 0%, transparent 50%),
    radial-gradient(ellipse at 50% 75%, #1e6b4e26 0%, transparent 50%),
    radial-gradient(ellipse at 35% 25%, #c8922a26 0%, transparent 45%),
    radial-gradient(ellipse at 65% 70%, #8b1a2b26 0%, transparent 45%);
  background-size: 140% 140%;
  animation: cathedralKaleidoscope 20s ease-in-out infinite;
}

@keyframes cathedralKaleidoscope {
  0%, 100% { transform: scale(1) rotate(0deg); background-position: 0 0; }
  50% { transform: scale(1.05) rotate(2deg); background-position: 12% -10%; }
}

.cathedral-grid { transform: perspective(800px) rotateX(14deg); }

.cathedral-nave {
  display: grid;
  justify-items: center;
  max-width: 760px;
  text-align: center;
}

.cathedral-copy {
  margin-bottom: 2.5rem;
  color: #c8b8d4;
  font-size: clamp(1.2rem, 1.7vw, 1.55rem);
  letter-spacing: 0.04em;
}

.typewriter::after {
  content: "";
  display: inline-block;
  width: 0.5em;
  height: 1em;
  margin-left: 0.2em;
  background: #e8a0ff;
  vertical-align: -0.15em;
  animation: cursorBlink 720ms steps(2, start) infinite;
}

.portal-tunnel {
  position: absolute;
  inset: -10%;
  background:
    repeating-conic-gradient(from 45deg at 50% 88%, transparent 0deg 7deg, #d0d0e814 7deg 8deg, transparent 8deg 14deg),
    radial-gradient(ellipse at 50% 88%, #e8a0ff28 0%, transparent 22%),
    radial-gradient(ellipse at 50% 88%, #7b2d8e22 0%, transparent 46%);
  transform: perspective(900px) rotateX(58deg) translateY(12%);
  animation: tunnelPulse 4s ease-in-out infinite;
}

@keyframes tunnelPulse {
  50% { transform: perspective(900px) rotateX(58deg) translateY(12%) scale(1.04); }
}

.portal-inner {
  display: grid;
  justify-items: center;
  text-align: center;
}

.portal-title { animation: portalTitlePulse 4s ease-in-out infinite; }

@keyframes portalTitlePulse {
  50% { transform: scale(1.02); }
}

.nav-rail {
  position: fixed;
  z-index: 50;
  top: 50%;
  right: clamp(1rem, 2.2vw, 2rem);
  display: grid;
  gap: 1.15rem;
  padding: 1rem 0.45rem;
  transform: translateY(-50%);
}

.nav-rail::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: var(--bezel-gradient);
  box-shadow: 0 0 12px #d0d0e855;
}

.nav-dot {
  position: relative;
  width: 16px;
  height: 16px;
  border: 2px solid #d0d0e8;
  background: rgba(11, 12, 42, 0.8);
  cursor: pointer;
  transform: rotate(45deg);
  transition: background 250ms ease, border-color 250ms ease, box-shadow 250ms ease;
}

.nav-dot:hover {
  border-color: #c8922a;
  box-shadow: 0 0 12px #c8922a66;
}

.nav-dot.active {
  border-color: #7b2d8e;
  background: #7b2d8e;
  box-shadow: 0 0 20px #7b2d8e99;
}

.wipe-layer {
  position: fixed;
  z-index: 90;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, transparent 0 45%, #d0d0e8 49%, #7b2d8e 50%, transparent 55%);
  opacity: 0;
  transform: translateX(-130%);
}

.wipe-layer.active {
  animation: diagonalWipe 760ms cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes diagonalWipe {
  0% { opacity: 0; transform: translateX(-130%); }
  20%, 65% { opacity: 0.75; }
  100% { opacity: 0; transform: translateX(130%); }
}

.quest-section .section-inner {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 650ms ease, transform 650ms cubic-bezier(0.4, 0, 0.2, 1);
}

.quest-section.in-view .section-inner,
.entry-vault .hero-lockup {
  opacity: 1;
  transform: translateY(0);
}

.entry-vault .hero-lockup { transform: rotate(12deg) translateY(-1vw); }

@media (max-width: 900px) {
  .card-grid { grid-template-columns: 1fr; }
  .quest-section.in-view .flip-card,
  .quest-section.in-view .flip-card:nth-child(2),
  .quest-section.in-view .flip-card:nth-child(3) {
    transform: translateY(0) rotate(0deg);
  }
  .diagonal-descend,
  .diagonal-descend > *,
  .forge-panel,
  .forge-panel > * { transform: none; }
  .type-readout { margin-top: 0; justify-self: center; }
  .nav-rail { right: 0.55rem; }
}

@media (max-width: 620px) {
  .hero-lockup { transform: rotate(12deg) scale(0.86); }
  .quest-section { padding-inline: 1rem; }
  .node-web { min-height: 280px; }
  .card-face { padding: 1rem; }
}