:root {
  --bg: #0A0B0D;
  --panel: #111317;
  --ink: #E8E9EC;
  --muted: #8C919A;
  --faint: #5C616A;
  --rule: #22252B;
  --rule-strong: #3A3E46;
  --accent: #8B7CFF;
  --accent-soft: rgba(139, 124, 255, .32);
  --head-a: #FFFFFF;
  --head-b: #9EA3AD;
  --sans: "Space Grotesk", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  color-scheme: dark;
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

:root[data-theme="light"] {
  --bg: #FAFAF8;
  --panel: #FFFFFF;
  --ink: #141414;
  --muted: #5E5E58;
  --faint: #8A8A82;
  --rule: #D8D8D2;
  --rule-strong: #141414;
  --accent: #5B45E6;
  --accent-soft: rgba(91, 69, 230, .16);
  --head-a: #141414;
  --head-b: #4A4A46;
  color-scheme: light;
}

*, *::before, *::after {
  box-sizing: inherit;
}

html {
  background: var(--bg);
  scroll-padding-top: env(safe-area-inset-top, 0px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.mono {
  font-family: var(--mono);
}

.inner {
  max-width: 1080px;
  margin: 0 auto;
  padding-left: max(24px, env(safe-area-inset-left, 0px));
  padding-right: max(24px, env(safe-area-inset-right, 0px));
}

a {
  color: var(--ink);
  text-underline-offset: 3px;
}

a:hover {
  color: var(--accent);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.site-header {
  border-bottom: 1px solid var(--rule);
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding-top: 18px;
  padding-bottom: 18px;
  font-size: .8rem;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
}

.brand i {
  display: block;
  width: 10px;
  height: 10px;
  background: var(--accent);
  box-shadow: 0 0 14px var(--accent);
}

.right {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--muted);
}

.theme {
  margin: 0;
  padding: 5px 10px;
  font: inherit;
  font-size: .75rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--rule-strong);
  border-radius: 0;
  cursor: pointer;
}

.theme .to-dark,
:root[data-theme="light"] .theme .to-light {
  display: none;
}

:root[data-theme="light"] .theme .to-dark {
  display: inline;
}

@media (max-width: 560px) {
  .tagline {
    display: none;
  }
}

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--rule);
}

.topo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: .22;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse 80% 100% at 85% 0%, #000 25%, transparent 80%);
  mask-image: radial-gradient(ellipse 80% 100% at 85% 0%, #000 25%, transparent 80%);
}

.topo path {
  fill: none;
  stroke: var(--muted);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.topo .major {
  stroke: var(--accent);
  stroke-width: 1.2;
}

.glow {
  position: absolute;
  top: -160px;
  right: -120px;
  width: 620px;
  height: 620px;
  background: radial-gradient(closest-side, var(--accent-soft), transparent);
  pointer-events: none;
}

.hero .inner {
  position: relative;
  padding-top: 112px;
  padding-bottom: 88px;
}

.eyebrow {
  margin: 0 0 22px;
  font-size: .78rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--muted);
}

.eyebrow b {
  font-weight: 500;
  color: var(--accent);
}

h1 {
  max-width: 15ch;
  margin: 0;
  font-size: clamp(2.3rem, 6vw, 4.4rem);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -.035em;
  color: transparent;
  background: linear-gradient(180deg, var(--head-a), var(--head-b));
  -webkit-background-clip: text;
  background-clip: text;
}

.intro {
  max-width: 52ch;
  margin: 26px 0 0;
  font-size: 1.15rem;
  color: var(--muted);
}

.row {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 28px;
  padding: 52px 0;
  border-bottom: 1px solid var(--rule);
}

@media (max-width: 760px) {
  .row {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
    padding: 40px 0;
  }
}

.label {
  margin: 0;
  padding-top: 4px;
  font-size: .78rem;
  font-weight: 400;
  line-height: 1.55;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--muted);
}

.label b {
  font-weight: 500;
  color: var(--accent);
}

.copy {
  max-width: 60ch;
  margin: 0;
  font-size: 1.12rem;
}

.lead {
  margin-bottom: 22px;
}

.note {
  max-width: 60ch;
  margin: 18px 0 0;
  font-size: .95rem;
  color: var(--muted);
}

.points > div {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 18px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--rule);
}

.points > div:first-child {
  padding-top: 0;
}

.points h3 {
  min-width: 220px;
  margin: 0;
  font-size: 1.05rem;
  font-weight: 500;
}

.points p {
  margin: 0;
  font-size: .98rem;
  color: var(--muted);
}

.layers {
  display: grid;
  grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
  gap: 28px;
  align-items: center;
}

@media (max-width: 960px) {
  .layers {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }
}

.stack {
  display: grid;
  place-items: center;
  height: 470px;
  perspective: 1400px;
}

.stack-inner {
  position: relative;
  width: 190px;
  height: 190px;
  margin-top: 188px;
  transform-style: preserve-3d;
  transform: rotateX(58deg) rotateZ(-42deg);
}

.slab {
  position: absolute;
  inset: 0;
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--rule));
  border-radius: 14px;
  background: color-mix(in srgb, var(--accent) 7%, var(--bg));
  transform: translateZ(calc(var(--k) * 48px));
}

.slab::after {
  content: "";
  position: absolute;
  inset: -1px;
  border: 1px solid var(--accent);
  border-radius: inherit;
  box-shadow: 0 0 28px var(--accent-soft), inset 0 0 22px var(--accent-soft);
  opacity: 0;
  animation: layer-pulse 5s linear infinite;
  animation-delay: calc(var(--k) * .6s);
}

.slab span {
  position: absolute;
  top: 10px;
  left: 12px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
}

.slab.tools {
  border-style: dashed;
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, var(--bg));
}

.slab:nth-child(1), .layer-list li:nth-child(1) { --k: 0; }
.slab:nth-child(2), .layer-list li:nth-child(2) { --k: 1; }
.slab:nth-child(3), .layer-list li:nth-child(3) { --k: 2; }
.slab:nth-child(4), .layer-list li:nth-child(4) { --k: 3; }
.slab:nth-child(5), .layer-list li:nth-child(5) { --k: 4; }
.slab:nth-child(6), .layer-list li:nth-child(6) { --k: 5; }

.layer-list {
  display: flex;
  flex-direction: column-reverse;
  margin: 0;
  padding: 0;
  list-style: none;
}

.layer-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px dashed var(--rule);
}

.layer-list b {
  font-size: .78rem;
  font-weight: 500;
  color: var(--muted);
  animation: layer-number 5s linear infinite;
  animation-delay: calc(var(--k) * .6s);
}

.layer-list strong {
  display: block;
  font-size: 1.02rem;
  font-weight: 500;
}

.layer-list span {
  display: block;
  font-size: .95rem;
  color: var(--muted);
}

@keyframes layer-pulse {
  0% {
    opacity: 0;
  }
  5% {
    opacity: 1;
  }
  18%, 100% {
    opacity: 0;
  }
}

@keyframes layer-number {
  0%, 18%, 100% {
    color: var(--muted);
  }
  5% {
    color: var(--accent);
  }
}

@media (prefers-reduced-motion: reduce) {
  .slab::after,
  .layer-list b {
    animation: none;
  }

  .layer-list b {
    color: var(--accent);
  }
}

@media (max-width: 960px) {
  .stack {
    height: 360px;
  }

  .stack-inner {
    width: 150px;
    height: 150px;
    margin-top: 142px;
  }

  .slab {
    transform: translateZ(calc(var(--k) * 36px));
  }
}

.list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 28px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 1.1rem;
}

.list li::before {
  content: "→ ";
  content: "→ " / "";
  color: var(--accent);
}

@media (max-width: 520px) {
  .list {
    grid-template-columns: minmax(0, 1fr);
  }
}

.site-footer {
  display: grid;
  gap: 10px;
  padding-top: 40px;
  padding-bottom: 64px;
  font-size: .78rem;
  letter-spacing: .02em;
  color: var(--muted);
}

.site-footer p {
  margin: 0;
}

.legal {
  text-transform: uppercase;
}

.route {
  color: var(--ink);
}

.acknowledgement {
  text-wrap: balance;
}