:root {
  --json-coral: oklch(68% 0.18 35);
  --json-blue: oklch(57% 0.17 250);
  --json-mint: oklch(78% 0.12 170);
  --json-amber: oklch(80% 0.14 82);
  --json-graphite: oklch(23% 0.035 255);
}

:root[data-theme="dark"] {
  --json-coral: oklch(75% 0.15 35);
  --json-blue: oklch(72% 0.13 250);
  --json-mint: oklch(82% 0.11 170);
  --json-amber: oklch(84% 0.12 82);
}

.nav-links { gap: clamp(0.7rem, 1.45vw, 1.35rem); }

.json-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(25rem, 1.05fr);
  min-height: calc(100svh - 4.75rem);
  align-items: center;
  padding-block: clamp(4rem, 8vw, 7rem);
  gap: clamp(2.5rem, 6vw, 6rem);
}

.json-hero h1 {
  max-width: 13ch;
  font-size: clamp(3rem, 4.4vw, 4.8rem);
}

.json-hero .hero-lede { font-size: clamp(1.05rem, 1.4vw, 1.25rem); }

.release-note {
  margin-top: 1rem;
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.stream-console {
  min-width: 0;
  margin: 0;
  overflow: hidden;
  border: 1px solid color-mix(in oklch, var(--json-blue) 35%, var(--line));
  border-radius: var(--radius-lg);
  background: var(--json-graphite);
  color: oklch(94% 0.015 250);
  box-shadow: 1rem 1rem 0 color-mix(in oklch, var(--json-coral) 48%, var(--line));
}

.json-hero-visual {
  min-width: 0;
}

.json-code-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1.4rem;
  gap: 0.8rem;
}

.json-code-window {
  position: static;
  width: auto;
  min-width: 0;
  border-color: color-mix(in oklch, var(--json-blue) 58%, var(--code-line));
  border-radius: var(--radius-md);
  box-shadow: 0 1rem 2.4rem oklch(10% 0.04 270 / 0.16);
}

.json-code-window-number {
  border-color: color-mix(in oklch, var(--json-mint) 58%, var(--code-line));
}

.json-code-window pre {
  min-height: 9.8rem;
  padding: 1rem;
  font-size: clamp(0.64rem, 1.1vw, 0.76rem);
  line-height: 1.65;
}

.stream-console figcaption {
  display: flex;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid oklch(42% 0.04 250);
  color: oklch(74% 0.03 250);
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.chunk-track,
.event-track {
  padding: 1.4rem 1.25rem;
}

.chunk-track {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
}

.chunk {
  padding: 0.55rem 0.7rem;
  border: 1px solid oklch(52% 0.04 250);
  border-radius: 0.4rem;
  background: oklch(29% 0.04 250);
  font-family: var(--font-mono);
  font-size: clamp(0.68rem, 1.3vw, 0.82rem);
}

.chunk-split { border-color: var(--json-coral); }
.chunk-utf8 { border-color: var(--json-mint); }

.stream-arrow {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.7rem;
  color: var(--json-amber);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.stream-arrow::before,
.stream-arrow::after {
  height: 1px;
  background: oklch(43% 0.04 250);
  content: "";
}

.event-track {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.event-chip {
  padding: 0.7rem 0.5rem;
  border: 1px solid oklch(46% 0.04 250);
  border-radius: 0.45rem;
  color: oklch(82% 0.03 250);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-align: center;
}

.event-chip:nth-child(3n + 1) { border-color: var(--json-blue); }
.event-chip:nth-child(3n + 2) { border-color: var(--json-coral); }
.event-chip:nth-child(3n) { border-color: var(--json-mint); }

.acceptance-gate {
  display: flex;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-top: 1px solid oklch(42% 0.04 250);
  color: oklch(75% 0.03 250);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.acceptance-gate strong { color: var(--json-mint); }

.json-status {
  border-block: 1px solid var(--line);
  background: var(--surface);
}

.json-status-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.json-status-item {
  padding: 1.45rem 1.6rem;
  border-right: 1px solid var(--line);
}

.json-status-item:last-child { border: 0; }
.json-status-item strong,
.json-status-item span { display: block; }
.json-status-item span { color: var(--ink-soft); font-size: 0.8rem; }

.json-section { padding-block: clamp(5rem, 10vw, 9rem); }

.json-section-heading {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  align-items: end;
  margin-bottom: 3rem;
  gap: 3rem;
}

.json-section-heading h2 { margin: 0; }
.json-section-heading p { max-width: 62ch; margin: 0; color: var(--ink-soft); }

.boundary-grid,
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.boundary-card,
.guide-card {
  min-width: 0;
  padding: 1.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.boundary-card b {
  display: block;
  margin-bottom: 1.3rem;
  color: var(--json-coral);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.boundary-card p,
.guide-card p { margin: 0; color: var(--ink-soft); }
.guide-card h3 { margin-bottom: 0.7rem; font-size: 1.25rem; }
.guide-card a { font-weight: 630; }

.transaction-line {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  align-items: center;
  margin-top: 3rem;
  gap: 0.45rem;
}

.transaction-node {
  padding: 0.85rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 0.45rem;
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-align: center;
}

.transaction-node.publish { border-color: var(--json-mint); }
.transaction-node.failure { border-color: var(--json-coral); }
.transaction-link { height: 1px; background: var(--line); }

.guide-hero {
  padding-block: clamp(4rem, 8vw, 7rem) 3rem;
}

.guide-hero h1,
.doc-hero h1 { max-width: 15ch; font-size: clamp(2.8rem, 4.5vw, 4.6rem); }
.guide-hero p { max-width: 65ch; color: var(--ink-soft); font-size: 1.12rem; }

.guide-layout {
  display: grid;
  grid-template-columns: minmax(12rem, 0.28fr) minmax(0, 0.72fr);
  align-items: start;
  padding-bottom: 6rem;
  gap: clamp(2rem, 6vw, 6rem);
}

.toc { position: sticky; top: 7rem; }

.prose pre {
  max-width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  background: var(--code-bg);
  color: oklch(91% 0.02 270);
  padding: 1.35rem;
  line-height: 1.7;
}

.prose table { width: 100%; border-collapse: collapse; }
.prose th,
.prose td { padding: 0.8rem; border-bottom: 1px solid var(--line); text-align: left; }
.prose th { color: var(--ink-soft); font-size: 0.78rem; text-transform: uppercase; }

.sequence {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.6rem;
  margin-block: 2rem;
}

.sequence > div {
  padding: 1rem;
  border: 1px solid var(--line);
  border-top: 3px solid var(--json-blue);
  background: var(--surface);
}

.sequence strong,
.sequence span { display: block; }
.sequence span { margin-top: 0.3rem; color: var(--ink-soft); font-size: 0.78rem; }

@media (max-width: 980px) {
  .json-hero { grid-template-columns: 1fr; min-height: auto; }
  .json-hero h1 { max-width: 14ch; font-size: clamp(2.85rem, 5.5vw, 3.7rem); }
  .json-status-inner { grid-template-columns: repeat(2, 1fr); }
  .json-status-item:nth-child(2) { border-right: 0; }
  .json-status-item:nth-child(-n + 2) { border-bottom: 1px solid var(--line); }
  .boundary-grid,
  .guide-grid { grid-template-columns: 1fr 1fr; }
  .guide-layout { grid-template-columns: 1fr; }
  .guide-hero h1,
  .doc-hero h1 { font-size: clamp(2.6rem, 5.4vw, 3.5rem); }
  .toc { position: static; }
}

@media (max-width: 650px) {
  .json-hero h1 { font-size: clamp(2.5rem, 10vw, 3rem); }
  .guide-hero h1,
  .doc-hero h1 { font-size: clamp(2.35rem, 9vw, 2.9rem); }
  .json-code-pair { grid-template-columns: 1fr; }
  .event-track { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .json-section-heading { grid-template-columns: 1fr; gap: 1rem; }
  .boundary-grid,
  .guide-grid,
  .sequence { grid-template-columns: 1fr; }
  .transaction-line { grid-template-columns: 1fr; }
  .transaction-link { width: 1px; height: 1.2rem; margin-inline: auto; }
  .acceptance-gate { flex-direction: column; gap: 0.35rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}