:root {
  color-scheme: light;
  --bg: oklch(1 0 0);
  --surface: oklch(0.975 0 0);
  --surface-strong: oklch(0.94 0.006 26);
  --ink: oklch(0.18 0.018 25);
  --ink-strong: oklch(0.11 0.012 25);
  --muted: oklch(0.43 0.018 25);
  --line: oklch(0.88 0.008 25);
  --line-strong: oklch(0.75 0.018 25);
  --primary: oklch(0.61 0.218 25.7);
  --primary-dark: oklch(0.48 0.18 25.7);
  --primary-soft: oklch(0.95 0.035 25.7);
  --accent: oklch(0.47 0.115 194);
  --accent-soft: oklch(0.93 0.04 194);
  --success: oklch(0.47 0.12 148);
  --danger: oklch(0.55 0.2 25);
  --code-bg: oklch(0.16 0.014 25);
  --code-ink: oklch(0.94 0.008 25);
  --code-muted: oklch(0.72 0.025 25);
  --focus: oklch(0.62 0.16 194);
  --shadow-sm: 0 2px 8px oklch(0.12 0.02 25 / 0.08);
  --topbar-height: 64px;
  --sidebar-width: 256px;
  --toc-width: 188px;
  --radius: 7px;
  --z-sticky: 20;
  --z-drawer: 40;
  --z-toast: 60;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: oklch(0.105 0 0);
  --surface: oklch(0.15 0.008 25);
  --surface-strong: oklch(0.2 0.012 25);
  --ink: oklch(0.9 0.008 25);
  --ink-strong: oklch(0.97 0.004 25);
  --muted: oklch(0.7 0.014 25);
  --line: oklch(0.27 0.012 25);
  --line-strong: oklch(0.39 0.02 25);
  --primary: oklch(0.66 0.2 25.7);
  --primary-dark: oklch(0.73 0.17 25.7);
  --primary-soft: oklch(0.22 0.055 25.7);
  --accent: oklch(0.72 0.11 194);
  --accent-soft: oklch(0.22 0.045 194);
  --success: oklch(0.72 0.12 148);
  --danger: oklch(0.7 0.17 25);
  --code-bg: oklch(0.075 0 0);
  --code-ink: oklch(0.92 0.008 25);
  --code-muted: oklch(0.68 0.02 25);
  --shadow-sm: 0 2px 8px oklch(0 0 0 / 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--topbar-height) + 24px);
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  letter-spacing: 0;
}

button,
input,
select,
textarea {
  font: inherit;
  letter-spacing: 0;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

:focus-visible {
  outline: 3px solid color-mix(in oklch, var(--focus), transparent 45%);
  outline-offset: 2px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  color: var(--ink-strong);
  text-wrap: balance;
}

h1 {
  max-width: 17ch;
  margin-bottom: 22px;
  font-size: clamp(2.2rem, 5vw, 4.65rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
}

h2 {
  margin-bottom: 8px;
  font-size: clamp(1.65rem, 2.5vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
  line-height: 1.35;
}

p {
  max-width: 72ch;
  text-wrap: pretty;
}

code,
pre,
kbd {
  font-family:
    "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

code {
  font-size: 0.92em;
}

pre {
  margin: 0;
  overflow: auto;
  color: var(--code-ink);
  background: var(--code-bg);
  tab-size: 4;
}

pre code {
  display: block;
  min-width: max-content;
  padding: 20px;
  font-size: 0.82rem;
  line-height: 1.7;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: calc(var(--z-toast) + 1);
  padding: 10px 14px;
  color: white;
  background: var(--primary-dark);
  transform: translateY(-160%);
}

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

.topbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  height: var(--topbar-height);
  padding: 0 20px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in oklch, var(--bg), transparent 4%);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: calc(var(--sidebar-width) - 20px);
  color: var(--ink-strong);
  text-decoration: none;
}

.brand:hover {
  color: var(--ink-strong);
}

.brand-mark {
  position: relative;
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 6px solid var(--primary);
  border-radius: 50%;
}

.brand-mark::before,
.brand-mark::after,
.brand-mark span {
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  content: "";
}

.brand-mark::before {
  top: -5px;
  left: 8px;
  background: var(--accent);
}

.brand-mark::after {
  right: -5px;
  bottom: 3px;
  background: var(--ink-strong);
}

.brand-mark span {
  bottom: -5px;
  left: 1px;
  background: var(--primary-dark);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-copy strong {
  font-size: 0.95rem;
}

.brand-copy small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.68rem;
}

.topnav {
  display: flex;
  align-self: stretch;
  gap: 22px;
  margin-left: 8px;
}

.topnav a {
  position: relative;
  display: flex;
  align-items: center;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 650;
  text-decoration: none;
}

.topnav a[aria-current="page"] {
  color: var(--ink-strong);
}

.topnav a[aria-current="page"]::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: var(--primary);
  content: "";
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.version-picker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
}

.version-picker select {
  min-height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  padding: 0 28px 0 10px;
  font: inherit;
}

.global-search {
  position: relative;
  display: block;
}

.global-search input {
  width: min(30vw, 320px);
  height: 36px;
  padding: 0 40px 0 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface);
}

.global-search input::placeholder {
  color: var(--muted);
  opacity: 1;
}

.global-search kbd {
  position: absolute;
  top: 7px;
  right: 8px;
  min-width: 22px;
  padding: 1px 5px;
  color: var(--muted);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--bg);
  text-align: center;
  pointer-events: none;
}

.icon-button {
  display: grid;
  width: 36px;
  height: 36px;
  padding: 0;
  place-items: center;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--bg);
  cursor: pointer;
}

.icon-button:hover {
  color: var(--primary);
  border-color: var(--primary);
}

.mobile-nav-toggle {
  display: none;
}

.docs-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--toc-width);
  min-height: 100vh;
  padding-top: var(--topbar-height);
}

.sidebar {
  position: fixed;
  top: var(--topbar-height);
  bottom: 0;
  left: 0;
  z-index: var(--z-sticky);
  display: flex;
  width: var(--sidebar-width);
  flex-direction: column;
  overflow-y: auto;
  border-right: 1px solid var(--line);
  background: var(--bg);
}

.sidebar nav {
  padding: 18px 14px 28px;
}

.sidebar nav > a,
.module-nav a {
  display: block;
  padding: 5px 8px;
  color: var(--muted);
  border-radius: 4px;
  font-size: 0.82rem;
  text-decoration: none;
}

.sidebar nav > a:hover,
.module-nav a:hover,
.sidebar nav > a.active {
  color: var(--ink-strong);
  background: var(--surface);
}

.nav-group-title {
  margin: 19px 8px 7px;
  color: var(--ink-strong);
  font-size: 0.72rem;
  font-weight: 750;
}

.nav-group-title:first-child {
  margin-top: 0;
}

.module-nav {
  margin: 6px 0 0 8px;
  padding-left: 8px;
  border-left: 1px solid var(--line);
}

.sidebar-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  padding: 14px 20px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 0.72rem;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
}

main {
  grid-column: 2;
  width: min(100%, 1080px);
  margin: 0 auto;
  padding: 56px 52px 0;
}

main > section {
  padding: 68px 0;
  border-bottom: 1px solid var(--line);
}

.page-toc {
  position: fixed;
  top: calc(var(--topbar-height) + 46px);
  right: 0;
  width: var(--toc-width);
  padding: 0 24px 0 12px;
}

.page-toc strong {
  display: block;
  margin-bottom: 10px;
  color: var(--ink-strong);
  font-size: 0.72rem;
}

.page-toc a {
  display: block;
  padding: 3px 0;
  color: var(--muted);
  font-size: 0.75rem;
  text-decoration: none;
}

.page-toc a:hover {
  color: var(--primary);
}

.toc-progress {
  height: 2px;
  margin-top: 18px;
  overflow: hidden;
  background: var(--line);
}

.toc-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--primary);
  transition: width 140ms ease-out;
}

.breadcrumb {
  margin-bottom: 18px;
  color: var(--primary);
  font-family:
    "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.76rem;
  font-weight: 700;
}

.lead {
  max-width: 64ch;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
}

.intro-actions,
.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.intro-actions {
  justify-content: flex-start;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: 8px 15px;
  border-radius: 5px;
  font-size: 0.84rem;
  font-weight: 700;
  text-decoration: none;
}

.primary-button {
  color: white;
  border: 1px solid var(--primary-dark);
  background: var(--primary);
}

.primary-button:hover {
  color: white;
  background: var(--primary-dark);
}

.secondary-button {
  color: var(--ink-strong);
  border: 1px solid var(--line-strong);
  background: var(--bg);
}

.secondary-button:hover {
  color: var(--primary);
  border-color: var(--primary);
}

.text-link {
  font-size: 0.84rem;
  font-weight: 700;
  text-decoration: none;
}

.coverage-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 58px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.coverage-strip div {
  padding: 16px 18px 15px 0;
}

.coverage-strip div + div {
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

.coverage-strip strong,
.coverage-strip span {
  display: block;
}

.coverage-strip strong {
  color: var(--ink-strong);
  font-size: 1.55rem;
  line-height: 1;
}

.coverage-strip span {
  margin-top: 7px;
  color: var(--muted);
  font-size: 0.72rem;
}

.section-heading {
  margin-bottom: 28px;
}

.section-heading p {
  margin-bottom: 0;
  color: var(--muted);
}

.code-comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.code-comparison article,
.code-panel {
  min-width: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--code-bg);
}

.code-heading {
  display: flex;
  min-height: 49px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 9px 12px 9px 16px;
  color: var(--code-muted);
  border-bottom: 1px solid oklch(0.3 0.012 25);
  font-size: 0.72rem;
}

.code-heading > div {
  display: flex;
  min-width: 0;
  flex-direction: column;
}

.code-heading small {
  margin-top: 2px;
  color: var(--code-muted);
}

.code-label {
  color: var(--code-ink);
  font-weight: 700;
}

.copy-button {
  flex: none;
  padding: 5px 8px;
  color: var(--code-ink);
  border: 1px solid oklch(0.38 0.016 25);
  border-radius: 4px;
  background: transparent;
  font-size: 0.7rem;
  cursor: pointer;
}

.copy-button:hover {
  border-color: var(--primary);
}

.notice {
  margin-top: 18px;
  padding: 15px 17px;
  color: var(--ink);
  border: 1px solid color-mix(in oklch, var(--accent), var(--line) 70%);
  border-radius: var(--radius);
  background: var(--accent-soft);
  font-size: 0.88rem;
}

.notice strong {
  color: var(--ink-strong);
}

.lifecycle-map {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 36px minmax(0, 1fr);
  align-items: center;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.flow-lane {
  min-width: 0;
}

.flow-title {
  display: block;
  margin-bottom: 13px;
  color: var(--primary);
  font-family:
    "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.75rem;
  font-weight: 750;
}

.flow-lane ol {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 7px;
  margin: 0;
  padding: 0;
  counter-reset: flow;
  list-style: none;
}

.flow-lane li {
  min-width: 0;
  padding: 9px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--bg);
  font-size: 0.72rem;
  overflow-wrap: anywhere;
  counter-increment: flow;
}

.flow-lane li::before {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  content: counter(flow, decimal-leading-zero);
  font-family:
    "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.64rem;
}

.flow-divider {
  color: var(--accent);
  font-size: 1.5rem;
  text-align: center;
}

.two-column-copy {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 42px;
  margin-top: 30px;
}

.two-column-copy > * {
  min-width: 0;
}

.two-column-copy p {
  margin: 0;
  color: var(--muted);
}

.two-column-copy pre {
  margin-top: 14px;
  border-radius: var(--radius);
}

.architecture-stage {
  display: grid;
  grid-template-columns: minmax(220px, 0.85fr) minmax(0, 1.4fr);
  gap: 18px;
  align-items: stretch;
}

.architecture-core {
  display: flex;
  min-height: 230px;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 28px;
  color: white;
  border-radius: var(--radius);
  background: var(--primary-dark);
}

.architecture-core span {
  font-family:
    "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.72rem;
  opacity: 0.8;
}

.architecture-core strong {
  margin: 8px 0;
  font-size: 1.55rem;
}

.architecture-core small {
  max-width: 28ch;
  opacity: 0.82;
}

.architecture-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.architecture-links div {
  display: flex;
  min-height: 73px;
  flex-direction: column;
  justify-content: center;
  padding: 12px 15px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.architecture-links strong {
  color: var(--ink-strong);
  font-size: 0.82rem;
}

.architecture-links span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.7rem;
}

.table-wrap {
  overflow-x: auto;
  border-top: 1px solid var(--line);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: middle;
}

th {
  color: var(--muted);
  background: var(--surface);
  font-size: 0.7rem;
  font-weight: 700;
}

td:first-child {
  color: var(--ink-strong);
  font-weight: 650;
}

.browser-token {
  display: inline-grid;
  width: 25px;
  height: 25px;
  margin-right: 8px;
  place-items: center;
  color: white;
  border-radius: 50%;
  font-size: 0.63rem;
  font-weight: 800;
}

.browser-token.chrome {
  background: var(--primary);
}

.browser-token.edge {
  background: var(--accent);
}

.browser-token.brave {
  background: oklch(0.61 0.19 48);
}

.browser-token.firefox {
  background: oklch(0.54 0.2 310);
}

.browser-token.safari {
  background: oklch(0.54 0.16 230);
}

.browser-token.ie {
  background: oklch(0.48 0.12 240);
}

.yes {
  color: var(--success);
  font-weight: 700;
}

.no {
  color: var(--danger);
  font-weight: 700;
}

.config-field-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.config-field {
  min-width: 0;
  padding: 13px 15px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.config-field-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.config-field code {
  color: var(--primary);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.config-field .field-default {
  max-width: 48%;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.68rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.config-field p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.75rem;
}

.feature-band {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1.3fr);
  gap: 32px;
  align-items: center;
  padding: 30px 0;
  border-top: 1px solid var(--line);
}

.feature-band.reverse {
  grid-template-columns: minmax(0, 1.3fr) minmax(220px, 0.7fr);
}

.feature-band.reverse .feature-copy {
  grid-column: 2;
}

.feature-band.reverse .code-panel {
  grid-row: 1;
  grid-column: 1;
}

.feature-copy p {
  margin: 0;
  color: var(--muted);
}

.code-panel.wide {
  margin-top: 22px;
}

.protocol-switchboard,
.capability-list,
.utility-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.protocol-switchboard > div,
.capability-list > div,
.capability-list > a,
.utility-groups > div {
  min-height: 132px;
  padding: 18px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.capability-list > a {
  display: block;
  color: inherit;
  text-decoration: none;
  transition: background-color .15s ease;
}

.capability-list > a:hover,
.capability-list > a:focus-visible {
  background-color: var(--primary-soft);
}

.protocol-switchboard strong,
.capability-list strong,
.utility-groups strong {
  display: block;
  color: var(--ink-strong);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.protocol-switchboard p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.protocol-name {
  display: block;
  margin-bottom: 18px;
  color: var(--primary);
  font-family:
    "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.7rem;
  font-weight: 800;
}

.capability-list {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.capability-list > div,
.capability-list > a,
.utility-groups > div {
  min-height: 100px;
}

.capability-list span,
.utility-groups span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.72rem;
}

.utility-groups {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.recipe-list {
  border-top: 1px solid var(--line);
}

.recipe-list details {
  border-bottom: 1px solid var(--line);
}

.recipe-list summary {
  display: flex;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px 3px;
  color: var(--ink-strong);
  cursor: pointer;
}

.recipe-list summary span {
  font-weight: 700;
}

.recipe-list summary small {
  color: var(--muted);
  text-align: right;
}

.recipe-list pre {
  margin-bottom: 18px;
  border-radius: var(--radius);
}

.error-table {
  border-top: 1px solid var(--line);
}

.error-table > div {
  display: grid;
  grid-template-columns: minmax(230px, 0.55fr) minmax(0, 1fr);
  gap: 24px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.error-table code {
  color: var(--primary);
  font-weight: 700;
}

.error-table span {
  color: var(--muted);
}

.api-section {
  border-bottom: 0;
}

.coverage-badge {
  flex: none;
  padding: 5px 9px;
  color: var(--success);
  border: 1px solid color-mix(in oklch, var(--success), var(--line) 55%);
  border-radius: 999px;
  background: color-mix(in oklch, var(--success), transparent 92%);
  font-size: 0.7rem;
  font-weight: 700;
}

.api-toolbar {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(170px, 0.35fr) minmax(140px, 0.25fr);
  gap: 10px;
  margin: 0 0 26px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.api-toolbar label {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 5px;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 650;
}

.api-toolbar input,
.api-toolbar select {
  width: 100%;
  height: 37px;
  padding: 0 10px;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--bg);
  font-size: 0.78rem;
}

.api-module {
  margin: 48px 0 0;
  scroll-margin-top: calc(var(--topbar-height) + 20px);
}

.api-module:first-child {
  margin-top: 0;
}

.api-module-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--ink-strong);
}

.api-module-header h3 {
  margin: 0;
  font-size: 1.25rem;
}

.api-module-header code {
  color: var(--muted);
  font-size: 0.68rem;
}

.api-module-summary {
  margin: -4px 0 20px;
  color: var(--muted);
  font-size: 0.92rem;
  max-width: 68ch;
}

.api-symbol {
  border-bottom: 1px solid var(--line);
}

.api-symbol summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  min-height: 62px;
  padding: 9px 3px;
  cursor: pointer;
  list-style: none;
}

.api-symbol summary::-webkit-details-marker {
  display: none;
}

.api-kind {
  min-width: 62px;
  padding: 3px 6px;
  color: var(--accent);
  border: 1px solid color-mix(in oklch, var(--accent), var(--line) 70%);
  border-radius: 3px;
  background: var(--accent-soft);
  font-family:
    "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.61rem;
  font-weight: 700;
  text-align: center;
}

.api-symbol-name {
  min-width: 0;
}

.api-symbol-name strong,
.api-symbol-name span {
  display: block;
}

.api-symbol-name strong {
  color: var(--ink-strong);
  font-family:
    "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.82rem;
  overflow-wrap: anywhere;
}

.api-symbol-name span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.72rem;
}

.api-chevron {
  color: var(--muted);
  transition: transform 160ms ease-out;
}

.api-symbol[open] .api-chevron {
  transform: rotate(90deg);
}

.api-body {
  padding: 3px 0 26px 74px;
}

.api-signature {
  margin-bottom: 18px;
  padding: 12px 14px;
  overflow-x: auto;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface);
}

.api-description {
  color: var(--muted);
  font-size: 0.86rem;
}

.api-meta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 24px;
  margin: 18px 0;
}

.api-meta-grid h4,
.api-example h4 {
  margin: 0 0 7px;
  color: var(--ink-strong);
  font-size: 0.72rem;
}

.api-rows {
  border-top: 1px solid var(--line);
}

.api-row {
  display: grid;
  grid-template-columns: minmax(100px, 0.35fr) minmax(0, 1fr);
  gap: 12px;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.72rem;
}

.api-row code {
  color: var(--primary);
  overflow-wrap: anywhere;
}

.api-row span {
  color: var(--muted);
}

.api-example {
  margin-top: 18px;
}

.api-example pre {
  border-radius: var(--radius);
}

.api-result {
  margin-top: 10px;
  padding: 10px 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface);
  font-size: 0.76rem;
}

.api-source {
  display: block;
  margin-top: 12px;
  color: var(--muted);
  font-family:
    "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.64rem;
}

.empty-state {
  padding: 48px 20px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 30px;
  padding: 30px 0 42px;
  border-top: 1px solid var(--line);
  font-size: 0.76rem;
}

footer div {
  display: flex;
  flex-direction: column;
}

footer strong {
  color: var(--ink-strong);
}

footer span {
  margin-top: 3px;
  color: var(--muted);
}

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: var(--z-toast);
  max-width: min(360px, calc(100vw - 40px));
  padding: 10px 13px;
  color: white;
  border-radius: 5px;
  background: var(--ink-strong);
  box-shadow: var(--shadow-sm);
  font-size: 0.78rem;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition:
    opacity 160ms ease-out,
    transform 160ms ease-out;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1180px) {
  .docs-shell {
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  }

  .page-toc {
    display: none;
  }

  main {
    padding-right: 40px;
    padding-left: 40px;
  }
}

@media (max-width: 900px) {
  .brand {
    min-width: 0;
  }

  .topnav {
    display: none;
  }

  .mobile-nav-toggle {
    display: grid;
  }

  .docs-shell {
    display: block;
  }

  .sidebar {
    top: var(--topbar-height);
    width: min(320px, 86vw);
    transform: translateX(-105%);
    transition: transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
    box-shadow: var(--shadow-sm);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  main {
    width: min(100%, 860px);
    padding: 42px 28px 0;
  }

  .code-comparison,
  .architecture-stage,
  .feature-band,
  .feature-band.reverse {
    grid-template-columns: 1fr;
  }

  .feature-band.reverse .feature-copy,
  .feature-band.reverse .code-panel {
    grid-row: auto;
    grid-column: auto;
  }

  .capability-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  :root {
    --topbar-height: 58px;
  }

  .topbar {
    padding: 0 12px;
  }

  .brand-copy small {
    display: none;
  }

  .global-search {
    display: none;
  }

  main {
    padding: 28px 18px 0;
  }

  main > section {
    padding: 48px 0;
  }

  h1 {
    max-width: 12ch;
    font-size: 2.35rem;
  }

  .intro-actions,
  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .coverage-strip div:nth-child(3) {
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .coverage-strip div:nth-child(4) {
    border-top: 1px solid var(--line);
  }

  .code-comparison,
  .two-column-copy {
    grid-template-columns: 1fr;
  }

  .lifecycle-map {
    grid-template-columns: 1fr;
  }

  .flow-divider {
    padding: 10px 0;
    transform: rotate(90deg);
  }

  .flow-lane ol {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .architecture-links,
  .protocol-switchboard,
  .capability-list,
  .utility-groups {
    grid-template-columns: 1fr;
  }

  .protocol-switchboard > div,
  .capability-list > div,
  .utility-groups > div {
    min-height: 0;
  }

  .api-toolbar {
    grid-template-columns: 1fr;
  }

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

  .api-symbol summary {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .api-chevron {
    display: none;
  }

  .api-body {
    padding-left: 0;
  }

  .api-meta-grid {
    grid-template-columns: 1fr;
  }

  .error-table > div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .recipe-list summary {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .recipe-list summary small {
    text-align: left;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

/* BrowserConfig studio */

.configurator-page {
  overflow: hidden;
}

.save-state {
  color: var(--muted);
  font-size: 0.7rem;
}

.configurator-shell {
  display: grid;
  grid-template-columns: 218px minmax(480px, 1fr) minmax(390px, 0.72fr);
  height: 100vh;
  padding-top: var(--topbar-height);
}

.config-sidebar,
.config-main,
.config-preview {
  min-height: 0;
  overflow-y: auto;
}

.config-sidebar {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line);
  background: var(--bg);
}

.config-sidebar-header {
  display: flex;
  min-height: 58px;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
}

.config-sidebar-header span {
  color: var(--ink-strong);
  font-size: 0.78rem;
  font-weight: 750;
}

.config-sidebar-header strong {
  color: var(--primary);
  font-size: 0.66rem;
}

.config-sidebar nav {
  padding: 12px 10px 24px;
}

.config-sidebar nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 7px 9px;
  color: var(--muted);
  border-radius: 4px;
  font-size: 0.76rem;
  text-decoration: none;
}

.config-sidebar nav a:hover,
.config-sidebar nav a.active {
  color: var(--ink-strong);
  background: var(--surface);
}

.config-sidebar nav a span:last-child {
  min-width: 20px;
  color: var(--muted);
  font-size: 0.62rem;
  text-align: right;
}

.config-sidebar-actions {
  display: flex;
  align-items: stretch;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
  padding: 14px;
  border-top: 1px solid var(--line);
}

.config-sidebar-actions .secondary-button {
  width: 100%;
  cursor: pointer;
}

.config-sidebar-actions a {
  font-size: 0.7rem;
  text-align: center;
  text-decoration: none;
}

.config-main {
  width: 100%;
  padding: 34px 38px 80px;
  background: var(--bg);
}

.config-intro {
  padding: 10px 0 32px;
  border-bottom: 1px solid var(--line);
}

.config-intro h1 {
  max-width: 13ch;
  font-size: clamp(2rem, 3.5vw, 3.8rem);
}

.preset-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  align-items: center;
  margin-top: 26px;
}

.preset-bar > span {
  margin-right: 3px;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
}

.preset-bar button {
  padding: 6px 9px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  font-size: 0.7rem;
  cursor: pointer;
}

.preset-bar button:hover {
  color: var(--primary);
  border-color: var(--primary);
}

.config-form-section {
  padding: 0;
}

.config-group {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--topbar-height) + 18px);
}

.config-group-heading {
  display: grid;
  grid-template-columns: minmax(180px, 0.45fr) minmax(0, 1fr);
  gap: 20px;
  margin-bottom: 22px;
}

.config-group-heading h2 {
  margin: 0;
  font-size: 1.25rem;
}

.config-group-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.field-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 16px;
}

.config-field-control {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 6px;
}

.config-field-control.full {
  grid-column: 1 / -1;
}

.config-field-control[hidden] {
  display: none;
}

.field-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.field-label label,
.field-label > span:first-child {
  color: var(--ink-strong);
  font-size: 0.76rem;
  font-weight: 700;
}

.field-label code {
  color: var(--muted);
  font-size: 0.62rem;
}

.field-help {
  min-height: 2.8em;
  margin: 0;
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.4;
}

.config-field-control input[type="text"],
.config-field-control input[type="number"],
.config-field-control input[type="url"],
.config-field-control input[type="password"],
.config-field-control select,
.config-field-control textarea {
  width: 100%;
  min-width: 0;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--bg);
  font-size: 0.76rem;
}

.config-field-control input[type="text"],
.config-field-control input[type="number"],
.config-field-control input[type="url"],
.config-field-control input[type="password"],
.config-field-control select {
  height: 38px;
  padding: 0 10px;
}

.config-field-control textarea {
  min-height: 96px;
  padding: 9px 10px;
  resize: vertical;
  font-family:
    "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  line-height: 1.5;
}

.config-field-control input::placeholder,
.config-field-control textarea::placeholder {
  color: var(--muted);
  opacity: 1;
}

.switch-control {
  display: flex;
  min-height: 64px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface);
}

.switch-control > span {
  min-width: 0;
}

.switch-control strong,
.switch-control small {
  display: block;
}

.switch-control strong {
  color: var(--ink-strong);
  font-size: 0.75rem;
}

.switch-control small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.65rem;
}

.switch-control input[type="checkbox"],
.switch-row input[type="checkbox"] {
  width: 34px;
  height: 19px;
  flex: none;
  margin: 0;
  appearance: none;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background:
    radial-gradient(circle at 8px 50%, var(--muted) 0 5px, transparent 6px),
    var(--bg);
  cursor: pointer;
  transition:
    background 150ms ease-out,
    border-color 150ms ease-out;
}

.switch-control input[type="checkbox"]:checked,
.switch-row input[type="checkbox"]:checked {
  border-color: var(--primary);
  background:
    radial-gradient(circle at 24px 50%, white 0 5px, transparent 6px),
    var(--primary);
}

.conditional-note {
  grid-column: 1 / -1;
  padding: 10px 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface);
  font-size: 0.7rem;
}

.config-preview {
  position: relative;
  border-left: 1px solid var(--line);
  background: var(--surface);
}

.preview-header {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  min-height: 58px;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in oklch, var(--surface), transparent 3%);
  backdrop-filter: blur(10px);
}

.preview-header > div span,
.preview-header > div strong {
  display: block;
}

.preview-header > div span {
  color: var(--muted);
  font-size: 0.62rem;
}

.preview-header > div strong {
  margin-top: 2px;
  color: var(--ink-strong);
  font-size: 0.78rem;
}

.validity-pill {
  padding: 3px 7px;
  border-radius: 999px;
  font-size: 0.63rem;
  font-weight: 750;
}

.validity-pill.valid {
  color: var(--success);
  border: 1px solid color-mix(in oklch, var(--success), var(--line) 50%);
  background: color-mix(in oklch, var(--success), transparent 92%);
}

.validity-pill.invalid {
  color: var(--danger);
  border: 1px solid color-mix(in oklch, var(--danger), var(--line) 50%);
  background: color-mix(in oklch, var(--danger), transparent 92%);
}

.validation-panel {
  margin: 14px;
  padding: 12px 14px;
  color: var(--danger);
  border: 1px solid color-mix(in oklch, var(--danger), var(--line) 55%);
  border-radius: 5px;
  background: color-mix(in oklch, var(--danger), transparent 94%);
  font-size: 0.7rem;
}

.validation-panel ul {
  margin: 6px 0 0;
  padding-left: 18px;
}

.preview-options {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(160px, 0.8fr);
  gap: 10px;
  padding: 14px;
  border-bottom: 1px solid var(--line);
}

.preview-options > label:not(.switch-row) {
  display: flex;
  flex-direction: column;
  gap: 5px;
  color: var(--muted);
  font-size: 0.64rem;
}

.preview-options select {
  width: 100%;
  height: 36px;
  padding: 0 8px;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--bg);
  font-size: 0.7rem;
}

.switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg);
}

.switch-row strong,
.switch-row small {
  display: block;
}

.switch-row strong {
  color: var(--ink-strong);
  font-size: 0.68rem;
}

.switch-row small {
  color: var(--muted);
  font-size: 0.59rem;
}

.preview-tabs {
  display: flex;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
}

.preview-tabs button {
  position: relative;
  padding: 10px 12px;
  color: var(--muted);
  border: 0;
  background: transparent;
  font-size: 0.68rem;
  font-weight: 700;
  cursor: pointer;
}

.preview-tabs button[aria-selected="true"] {
  color: var(--ink-strong);
}

.preview-tabs button[aria-selected="true"]::after {
  position: absolute;
  right: 10px;
  bottom: -1px;
  left: 10px;
  height: 2px;
  background: var(--primary);
  content: "";
}

.output-panel {
  min-height: 390px;
  padding: 14px;
}

.output-panel pre {
  min-height: 360px;
  border-radius: var(--radius);
}

.output-panel pre code {
  white-space: pre;
}

.explain-output {
  color: var(--ink);
}

.explain-output > div {
  border-top: 1px solid var(--line);
}

.explain-row {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.explain-row strong {
  display: block;
  color: var(--ink-strong);
  font-size: 0.72rem;
}

.explain-row span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.68rem;
}

.preview-actions {
  position: sticky;
  bottom: 0;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 12px 14px;
  border-top: 1px solid var(--line);
  background: color-mix(in oklch, var(--surface), transparent 3%);
  backdrop-filter: blur(10px);
}

.preview-actions button {
  cursor: pointer;
}

@media (max-width: 1240px) {
  .configurator-page {
    overflow: auto;
  }

  .configurator-shell {
    grid-template-columns: 200px minmax(0, 1fr);
    height: auto;
    min-height: 100vh;
  }

  .config-preview {
    grid-column: 2;
    min-height: 760px;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .config-sidebar {
    position: fixed;
    top: var(--topbar-height);
    bottom: 0;
    left: 0;
    width: 200px;
  }

  .config-main {
    grid-column: 2;
  }
}

@media (max-width: 820px) {
  .save-state {
    display: none;
  }

  .configurator-shell {
    display: block;
  }

  .config-sidebar {
    z-index: var(--z-drawer);
    width: min(300px, 86vw);
    transform: translateX(-105%);
    transition: transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
    box-shadow: var(--shadow-sm);
  }

  .config-sidebar.open {
    transform: translateX(0);
  }

  .config-main,
  .config-preview {
    width: 100%;
  }

  .config-main {
    padding: 28px 22px 60px;
  }
}

@media (max-width: 580px) {
  .field-layout,
  .config-group-heading,
  .preview-options {
    grid-template-columns: 1fr;
  }

  .config-intro h1 {
    font-size: 2.3rem;
  }

  .config-field-control.full {
    grid-column: auto;
  }

  .output-panel {
    padding: 10px;
  }

  .preview-actions {
    grid-template-columns: 1fr;
  }
}