:root {
  color-scheme: dark;
  --bg: #020202;
  --surface: #080808;
  --surface-raised: #0d0d0d;
  --border: #191919;
  --border-strong: #2b2b2b;
  --text: #f2f2f2;
  --body: #cecece;
  --muted: #7c7c7c;
  --gold: #fad100;
  --object: #ff8a3d;
  --scene: #52d6a5;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4.5rem;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
}

a {
  color: inherit;
}

.shell {
  width: min(72rem, calc(100% - 3rem));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 100;
  padding: .65rem 1rem;
  background: var(--gold);
  color: var(--bg);
  font-family: var(--mono);
  font-weight: 700;
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: rgba(2, 2, 2, .94);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.header-inner {
  min-height: 4.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-family: var(--mono);
  font-size: .9rem;
  font-weight: 700;
  text-decoration: none;
}

.brand > span:last-child > span {
  color: var(--gold);
}

.brand-mark {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 4px);
  grid-template-rows: repeat(3, 4px);
  gap: 3px;
  width: 18px;
  height: 18px;
}

.brand-mark i {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gold);
}

.brand-mark i:nth-child(1) { grid-area: 1 / 2; }
.brand-mark i:nth-child(2) { grid-area: 2 / 1; opacity: .65; }
.brand-mark i:nth-child(3) { grid-area: 2 / 2; }
.brand-mark i:nth-child(4) { grid-area: 2 / 3; opacity: .65; }
.brand-mark i:nth-child(5) { grid-area: 3 / 2; }

nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

nav a {
  color: var(--muted);
  font-family: var(--mono);
  font-size: .78rem;
  text-decoration: none;
}

nav a:hover,
nav a:focus-visible {
  color: var(--text);
}

.nav-action {
  padding: .5rem .8rem;
  border: 1px solid var(--border-strong);
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(22rem, .9fr);
  align-items: center;
  gap: 5rem;
  min-height: calc(100vh - 4.5rem);
  padding-block: 6rem;
}

.eyebrow,
.section-label,
.status {
  color: var(--muted);
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .06em;
  text-transform: lowercase;
}

.eyebrow span,
.status span {
  display: inline-block;
  width: .5rem;
  height: .5rem;
  margin-right: .5rem;
  border-radius: 50%;
  background: var(--gold);
}

h1,
h2,
h3 {
  margin-top: 0;
  font-family: var(--mono);
  letter-spacing: -.045em;
  line-height: 1.15;
}

h1 {
  max-width: 12ch;
  margin-bottom: 1.6rem;
  font-size: clamp(3.1rem, 6.2vw, 5.8rem);
}

h1 em {
  color: var(--gold);
  font-style: normal;
}

.hero-lede {
  max-width: 38rem;
  margin-bottom: 2.2rem;
  color: var(--body);
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-width: 11rem;
  padding: .75rem 1rem;
  border: 1px solid transparent;
  font-family: var(--mono);
  font-size: .82rem;
  font-weight: 700;
  text-decoration: none;
}

.button-primary {
  background: var(--gold);
  color: var(--bg);
}

.button-secondary {
  border-color: rgba(250, 209, 0, .3);
  background: rgba(250, 209, 0, .04);
  color: var(--gold);
}

.button:hover,
.button:focus-visible {
  border-color: var(--text);
}

.memory-preview {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  font-family: var(--mono);
}

.preview-bar,
.preview-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .7rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-size: .68rem;
}

.preview-bar > span {
  display: flex;
  gap: .35rem;
}

.preview-bar i {
  display: block;
  width: .45rem;
  height: .45rem;
  border-radius: 50%;
  background: var(--border-strong);
}

.preview-bar i:first-child {
  background: var(--gold);
}

.preview-body {
  min-height: 24rem;
  padding: 2.25rem 1.5rem;
  color: var(--body);
  font-size: .76rem;
  overflow: hidden;
}

.preview-body p {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin: 0 0 1.3rem;
  white-space: nowrap;
}

.preview-body b {
  color: var(--text);
}

.level-1 { padding-left: 1rem; }
.level-2 { padding-left: 3.2rem; }

.branch {
  min-width: 7rem;
  color: var(--muted);
}

.node {
  flex: 0 0 auto;
  width: .65rem;
  height: .65rem;
  border-radius: 50%;
}

.node-image { background: var(--gold); }
.node-object { background: var(--object); }
.node-scene { background: var(--scene); }

.preview-footer {
  border-top: 1px solid var(--border);
  border-bottom: 0;
  text-transform: uppercase;
}

.section {
  padding-block: 7rem;
  border-top: 1px solid var(--border);
}

.section-label {
  margin-bottom: 2rem;
  color: var(--gold);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.section-heading {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: end;
  margin-bottom: 3rem;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(2.2rem, 4.5vw, 3.7rem);
}

.section-heading > p,
.install-grid > div:first-child > p:last-child {
  max-width: 36rem;
  margin: 0;
  color: var(--body);
  font-size: 1.05rem;
}

.example-card {
  display: grid;
  grid-template-columns: 1.4fr .6fr;
  border: 1px solid var(--border-strong);
  background: var(--surface);
}

.card-copy {
  padding: clamp(1.5rem, 4vw, 3rem);
  border-right: 1px solid var(--border-strong);
}

.card-copy h3 {
  max-width: 20ch;
  margin-bottom: 1.4rem;
  font-size: clamp(1.7rem, 3vw, 2.7rem);
}

.card-copy > p:not(.status) {
  max-width: 48rem;
  color: var(--body);
}

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

.future-link {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1.2rem;
  color: var(--gold);
  font-family: var(--mono);
  font-size: .78rem;
  text-decoration: none;
}

.future-link:hover {
  color: var(--text);
}

.future-link span,
.install-placeholder > span {
  padding: .2rem .45rem;
  border: 1px solid var(--border-strong);
  color: var(--muted);
  font-size: .65rem;
  text-transform: uppercase;
}

.example-facts {
  margin: 0;
  padding: 1.2rem 2rem;
}

.example-facts div {
  padding-block: 1rem;
  border-bottom: 1px solid var(--border);
}

.example-facts div:last-child {
  border-bottom: 0;
}

.example-facts dt {
  color: var(--muted);
  font-family: var(--mono);
  font-size: .68rem;
  text-transform: uppercase;
}

.example-facts dd {
  margin: .2rem 0 0;
  color: var(--body);
  font-size: .9rem;
}

.dataset-note {
  max-width: 58rem;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: .83rem;
}

.install-section {
  background: var(--surface);
}

.install-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(20rem, .8fr);
  gap: 4rem;
  align-items: end;
  margin-bottom: 2.5rem;
}

.install-heading h2 {
  margin: 0;
}

.install-heading > p:last-child,
.config-help {
  color: var(--body);
}

.install-heading a {
  color: var(--gold);
}

.config-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.config-card {
  min-width: 0;
  border: 1px solid var(--border-strong);
  background: var(--bg);
}

.config-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--border);
}

.config-header h3 {
  margin: .2rem 0 0;
  font-family: var(--mono);
  font-size: .82rem;
  font-weight: 500;
}

.config-kicker {
  margin: 0;
  color: var(--gold);
  font-family: var(--mono);
  font-size: .66rem;
  text-transform: uppercase;
}

.copy-button {
  padding: .5rem .8rem;
  border: 1px solid var(--gold);
  background: transparent;
  color: var(--gold);
  cursor: pointer;
  font: 700 .68rem var(--mono);
  text-transform: uppercase;
}

.copy-button:hover {
  background: var(--gold);
  color: var(--bg);
}

.config-card pre {
  max-height: 25rem;
  margin: 0;
  padding: 1.3rem;
  overflow: auto;
  color: var(--text);
  font: .72rem/1.65 var(--mono);
  tab-size: 2;
}

.config-note {
  margin: 0;
  padding: 1rem 1.2rem;
  border-top: 1px solid var(--border);
  color: var(--body);
  font-size: .78rem;
}

.config-note code,
.config-help code {
  color: var(--text);
}

.reference-section .config-note a {
  color: var(--gold);
}

.config-help {
  max-width: 76rem;
  margin: 1.5rem 0 0;
  font-size: .82rem;
}

.copy-status {
  min-height: 1.4rem;
  margin: .6rem 0 0;
  color: var(--gold);
  font: .7rem var(--mono);
}

footer {
  padding-block: 2rem;
  border-top: 1px solid var(--border);
}

footer p {
  color: var(--muted);
  font-family: var(--mono);
  font-size: .72rem;
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
}

@media (max-width: 860px) {
  .hero,
  .section-heading,
  .example-card,
  .install-heading,
  .config-grid {
    grid-template-columns: 1fr;
  }

  .install-heading {
    gap: 1.5rem;
  }

  .hero {
    gap: 4rem;
    min-height: auto;
  }

  .memory-preview {
    max-width: 38rem;
  }

  .card-copy {
    border-right: 0;
    border-bottom: 1px solid var(--border-strong);
  }

}

@media (max-width: 620px) {
  .shell {
    width: min(100% - 2rem, 72rem);
  }

  .header-inner {
    min-height: 4rem;
  }

  nav {
    gap: .65rem;
  }

  .site-header nav > a:not(.nav-action) {
    display: none;
  }

  .hero {
    padding-block: 4rem;
  }

  .actions,
  .button {
    width: 100%;
  }

  h1 {
    font-size: clamp(2.75rem, 14vw, 4.2rem);
  }

  .section {
    padding-block: 4.5rem;
  }

  .card-copy,
  .example-facts,
  .config-card pre {
    padding: 1.25rem;
  }

  .preview-body {
    padding-inline: 1rem;
    font-size: .68rem;
  }

  .level-2 { padding-left: 1.6rem; }
  .branch { min-width: 6.3rem; }

  .preview-footer {
    flex-wrap: wrap;
  }

  .footer-inner,
  footer nav {
    align-items: flex-start;
    flex-direction: column;
  }

  footer nav {
    gap: .7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}