:root {
  --bg: #f4f7f6;
  --panel: #10212a;
  --panel-soft: #17313d;
  --ink: #142025;
  --ink-soft: #52656c;
  --paper: #ffffff;
  --line: #d8e4e2;
  --accent: #0f766e;
  --accent-strong: #0a5f59;
  --gold: #b7791f;
  --code: #0f1720;
  --shadow: 0 22px 60px rgba(16, 33, 42, .16);
  --content: 76rem;
  --font-body: "Aptos", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-code: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--font-body);
  line-height: 1.6;
}

a {
  color: var(--accent-strong);
  text-underline-offset: .18em;
}

a:hover {
  color: #094944;
}

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

code,
pre {
  font-family: var(--font-code);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 20;
  padding: .7rem 1rem;
  color: var(--paper);
  background: var(--panel);
  border-radius: .45rem;
}

.skip-link:focus {
  top: 1rem;
}

.page-shell {
  width: min(calc(100% - 1.5rem), var(--content));
  margin: 1.2rem auto;
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
}

.site-header--compact {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(10px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 800;
}

.brand__icon {
  width: 2.3rem;
  height: 2.3rem;
}

.brand__name {
  font-size: 1.08rem;
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem .85rem;
  font-weight: 700;
}

.top-nav a {
  color: var(--ink);
  text-decoration: none;
}

.top-nav a:hover {
  color: var(--accent-strong);
}

.hero {
  min-height: 33rem;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(22rem, .95fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: center;
  padding: clamp(2rem, 5vw, 5rem) clamp(1rem, 4vw, 4rem);
  color: #eef8f6;
  background: var(--panel);
}

.eyebrow {
  margin: 0 0 .7rem;
  color: var(--gold);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .78rem;
}

.hero h1 {
  margin: 0;
  max-width: 13ch;
  font-size: clamp(2.5rem, 6vw, 5.5rem);
  line-height: .96;
  letter-spacing: 0;
}

.hero__lede {
  max-width: 42rem;
  color: #cce0dc;
  font-size: 1.16rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.4rem;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding: .72rem 1rem;
  border: 1px solid rgba(255, 255, 255, .35);
  color: #f6fbfa;
  text-decoration: none;
  font-weight: 800;
}

.button--primary {
  background: #f6fbfa;
  color: var(--panel);
  border-color: #f6fbfa;
}

.hero__visual {
  position: relative;
  display: grid;
  gap: 1rem;
  padding: 1.2rem;
  border: 1px solid rgba(255, 255, 255, .18);
  background: rgba(255, 255, 255, .05);
}

.scan-card,
.engine-stack {
  border: 1px solid rgba(255, 255, 255, .2);
  background: rgba(255, 255, 255, .07);
  padding: 1rem;
}

.scan-card span {
  display: block;
  color: #9ecdc5;
  font-size: .82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.scan-card strong {
  display: block;
  margin-top: .25rem;
  font-size: 1.3rem;
}

.engine-stack {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .55rem;
}

.engine-stack span {
  display: grid;
  place-items: center;
  min-height: 4.8rem;
  border: 1px solid rgba(127, 215, 196, .45);
  color: #f8fcfb;
  font-weight: 900;
}

.feature-strip,
.docs-panel {
  padding: clamp(1.5rem, 4vw, 3.5rem) clamp(1rem, 4vw, 4rem);
}

.feature-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  background: #eef5f3;
  border-bottom: 1px solid var(--line);
}

.feature-strip article,
.doc-card {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 1.1rem;
}

.feature-strip h2,
.doc-card h3 {
  margin: 0 0 .45rem;
  font-size: 1.05rem;
}

.feature-strip p,
.doc-card p {
  margin: 0;
  color: var(--ink-soft);
}

.section-heading h2 {
  margin: 0 0 1.2rem;
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1.06;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.doc-card__link {
  display: inline-block;
  margin-top: .9rem;
  font-weight: 800;
}

.docs-layout {
  display: grid;
  grid-template-columns: 18rem minmax(0, 1fr);
  align-items: start;
}

.docs-sidebar {
  position: sticky;
  top: 4.8rem;
  max-height: calc(100vh - 5rem);
  overflow: auto;
  padding: 1rem;
  border-right: 1px solid var(--line);
}

.docs-sidebar__eyebrow {
  margin: 0 0 .75rem;
  color: var(--gold);
  font-weight: 900;
  text-transform: uppercase;
  font-size: .75rem;
}

.docs-nav {
  display: grid;
  gap: .55rem;
}

.docs-nav__item {
  display: block;
  padding: .72rem;
  border: 1px solid transparent;
  color: var(--ink);
  text-decoration: none;
}

.docs-nav__item:hover,
.docs-nav__item.is-active {
  border-color: var(--line);
  background: #f2f7f6;
}

.docs-nav__title {
  display: block;
  font-weight: 850;
}

.docs-nav__summary {
  display: block;
  color: var(--ink-soft);
  font-size: .86rem;
}

.docs-article {
  min-width: 0;
  padding: clamp(1.2rem, 4vw, 3.5rem);
}

.docs-article__header {
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1.5rem;
}

.docs-article h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1;
}

.docs-article__summary {
  max-width: 48rem;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.docs-article__source {
  margin: .5rem 0 0;
  color: #7b8d93;
  font-size: .9rem;
}

.toc {
  border: 1px solid var(--line);
  background: #f7fbfa;
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.toc__heading {
  margin: 0 0 .5rem;
  font-size: .95rem;
}

.toc__list {
  margin: 0;
  padding-left: 1.2rem;
}

.toc__item--level-3 {
  margin-left: 1rem;
}

.prose {
  max-width: 54rem;
}

.prose h2 {
  margin-top: 2rem;
  font-size: 1.75rem;
  line-height: 1.14;
}

.prose h3 {
  margin-top: 1.5rem;
  font-size: 1.22rem;
}

.prose p,
.prose li {
  color: #26383e;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: .94rem;
}

.prose th,
.prose td {
  border: 1px solid var(--line);
  padding: .55rem .65rem;
  vertical-align: top;
}

.prose th {
  background: #edf5f3;
  text-align: left;
}

.prose pre {
  overflow-x: auto;
  padding: 1rem;
  background: var(--code);
  color: #e9f8f5;
}

.prose code {
  font-size: .92em;
}

.prose :not(pre) > code {
  padding: .1rem .25rem;
  background: #edf5f3;
  color: #0b5952;
}

@media (max-width: 900px) {
  .hero,
  .feature-strip,
  .doc-grid,
  .docs-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 0;
  }

  .docs-sidebar {
    position: static;
    max-height: none;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .engine-stack {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .page-shell {
    width: 100%;
    margin: 0;
    border-left: 0;
    border-right: 0;
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero h1 {
    font-size: 2.45rem;
  }
}