:root {
  --content-max-width: 920px;
  --page-padding: 28px;
  --vcr-accent: #0f766e;
  --vcr-accent-2: #2563eb;
  --vcr-border: color-mix(in srgb, var(--fg) 16%, transparent);
  --vcr-muted: color-mix(in srgb, var(--fg) 68%, var(--bg));
  --vcr-surface: color-mix(in srgb, var(--bg) 94%, var(--fg));
  --vcr-code-bg: color-mix(in srgb, var(--bg) 88%, var(--fg));
}

.light,
.rust,
html:not(.js) {
  --links: #0f5f8f;
  --sidebar-active: #0f766e;
  --table-header-bg: #edf4f2;
  --table-alternate-bg: #f7faf9;
  --quote-bg: #f4f8f7;
  --quote-border: #cfe4df;
}

.ayu,
.coal,
.navy {
  --vcr-border: color-mix(in srgb, var(--fg) 22%, transparent);
  --vcr-surface: color-mix(in srgb, var(--bg) 86%, var(--fg));
  --vcr-code-bg: color-mix(in srgb, var(--bg) 80%, var(--fg));
}

.content main {
  padding-block-start: 22px;
}

.content p,
.content li {
  line-height: 1.62;
}

.content h1,
.content h2,
.content h3 {
  letter-spacing: 0;
}

.content h1 {
  margin-block: 0.55em 0.65em;
  font-size: 3.4rem;
  line-height: 1.12;
}

.content h2 {
  margin-block-start: 2.25em;
  padding-block-start: 0.35em;
  border-block-start: 1px solid var(--vcr-border);
  font-size: 2.35rem;
}

.content h3 {
  font-size: 1.78rem;
}

.content a {
  text-underline-offset: 0.18em;
}

.content a:hover {
  text-decoration-thickness: 0.08em;
}

.content code {
  padding: 0.08em 0.28em;
  border-radius: 4px;
  background: var(--vcr-code-bg);
}

.content pre code {
  padding: 0;
  background: transparent;
}

.content pre {
  border: 1px solid var(--vcr-border);
  border-radius: 8px;
  box-shadow: 0 8px 24px color-mix(in srgb, #000 8%, transparent);
}

.table-wrapper {
  margin-block: 1.25em;
  border: 1px solid var(--vcr-border);
  border-radius: 8px;
}

table {
  width: 100%;
}

table th,
table td {
  padding: 0.68em 0.9em;
  vertical-align: top;
}

blockquote {
  border-block: 0;
  border-inline-start: 4px solid var(--quote-border);
  border-radius: 0 8px 8px 0;
}

.sidebar-scrollbox {
  padding-block-start: 0.65rem;
}

.chapter li {
  margin-block: 0.18rem;
}

.chapter li.part-title {
  margin-block-start: 1.25rem;
  color: var(--vcr-muted);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.menu-title {
  font-weight: 700;
}

.vcr-hero {
  margin-block: 0 2rem;
  padding: 1.45rem 1.6rem;
  border: 1px solid var(--vcr-border);
  border-radius: 8px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--vcr-accent) 12%, transparent), transparent 52%),
    var(--vcr-surface);
}

.vcr-hero .eyebrow {
  margin: 0 0 0.45rem;
  color: var(--vcr-accent);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.vcr-hero .lead {
  margin: 0;
  max-width: 72ch;
  font-size: 1.82rem;
  line-height: 1.5;
}

.vcr-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
  margin-block: 1.25rem;
}

.vcr-card {
  padding: 1rem 1.1rem;
  border: 1px solid var(--vcr-border);
  border-radius: 8px;
  background: var(--vcr-surface);
}

.vcr-card h3 {
  margin-block: 0 0.35rem;
}

.vcr-card p {
  margin-block: 0;
  color: var(--vcr-muted);
}

.vcr-callout {
  margin-block: 1.2rem;
  padding: 0.95rem 1.1rem;
  border-inline-start: 4px solid var(--vcr-accent-2);
  border-radius: 0 8px 8px 0;
  background: var(--vcr-surface);
}

.vcr-callout p {
  margin-block: 0;
}

@media (max-width: 700px) {
  :root {
    --page-padding: 18px;
  }

  .content h1 {
    font-size: 2.7rem;
  }

  .vcr-hero {
    padding: 1.1rem 1.2rem;
  }
}

.vcr-flow {
  display: grid;
  align-items: stretch;
  gap: 0.75rem;
  margin-block: 1.4rem;
  padding: 1rem;
  border: 1px solid var(--vcr-border);
  border-radius: 8px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--vcr-accent) 8%, transparent), transparent 58%),
    var(--vcr-surface);
}

.vcr-flow-arch,
.vcr-flow-capture,
.vcr-flow-replay {
  grid-template-columns: minmax(130px, 1fr) auto minmax(130px, 1fr) auto minmax(130px, 1fr) auto minmax(150px, 1fr);
}

.vcr-node,
.vcr-node-stack {
  min-width: 0;
}

.vcr-node {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 5.6rem;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--vcr-border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--bg) 88%, var(--fg));
  box-shadow: 0 8px 22px color-mix(in srgb, #000 9%, transparent);
}

.vcr-node strong {
  display: block;
  margin-block: 0.12rem 0.18rem;
  font-size: 1.42rem;
  line-height: 1.25;
}

.vcr-node span {
  color: var(--vcr-muted);
  font-size: 1.16rem;
  line-height: 1.35;
}

.vcr-node .vcr-node-kicker {
  color: var(--vcr-accent);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.vcr-node-stack {
  display: grid;
  gap: 0.75rem;
}

.vcr-node-accent {
  border-color: color-mix(in srgb, var(--vcr-accent) 48%, var(--vcr-border));
}

.vcr-node-artifact {
  border-style: dashed;
}

.vcr-connector {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 7.2rem;
  color: var(--vcr-muted);
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
}

.vcr-connector::before {
  content: "";
  position: absolute;
  inset-inline: 0.15rem;
  top: 50%;
  border-block-start: 2px solid color-mix(in srgb, var(--vcr-accent) 55%, var(--fg));
  opacity: 0.7;
}

.vcr-connector::after {
  content: "";
  position: absolute;
  inset-inline-end: -0.05rem;
  top: calc(50% - 0.42rem);
  border-block: 0.42rem solid transparent;
  border-inline-start: 0.68rem solid var(--vcr-accent);
}

.vcr-connector span {
  position: relative;
  z-index: 1;
  max-width: 8.4rem;
  padding: 0.24rem 0.46rem;
  border-radius: 999px;
  border: 1px solid var(--vcr-border);
  background: color-mix(in srgb, var(--bg) 92%, var(--fg));
}

@media (max-width: 900px) {
  .vcr-flow-arch,
  .vcr-flow-capture,
  .vcr-flow-replay {
    grid-template-columns: 1fr;
  }

  .vcr-connector {
    min-height: 2rem;
    min-width: 0;
  }

  .vcr-connector::before,
  .vcr-connector::after {
    display: none;
  }

  .vcr-connector span {
    max-width: none;
    border: 1px solid var(--vcr-border);
  }
}