/* Agent-Ready Video site styles.
   Type scale: 14 / 16 / 18 / 22 / 28 / 40 px. Spacing: multiples of 8 px (4 px only inside controls).
   Shell: 1120 px. Prose: 72ch. */
:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --surface-2: #f2f0ea;
  --text: #1b1d1c;
  --muted: #5b605d;
  --border: #dedad0;
  --accent: #0f5c4d;
  --accent-soft: #e2efe9;
  --on-accent: #fbfaf7;
  --code-bg: #f4f2ec;
  --warn: #8a5a00;
  --warn-soft: #fbefd6;
  --focus: #0f5c4d;
  --radius: 8px;
  --shell: 1120px;
  --prose: 72ch;
  --header-h: 64px;
  --font: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --fs-14: 14px; --fs-16: 16px; --fs-18: 18px; --fs-22: 22px; --fs-28: 28px; --fs-40: 40px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111413; --surface: #171b1a; --surface-2: #1d2221; --text: #e8ebe9; --muted: #a3aba7;
    --border: #2c3331; --accent: #6fd1b5; --accent-soft: #173a31; --on-accent: #111413; --code-bg: #1a1f1e;
    --warn: #f2c26b; --warn-soft: #3a2e14; --focus: #6fd1b5; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #111413; --surface: #171b1a; --surface-2: #1d2221; --text: #e8ebe9; --muted: #a3aba7;
  --border: #2c3331; --accent: #6fd1b5; --accent-soft: #173a31; --on-accent: #111413; --code-bg: #1a1f1e;
  --warn: #f2c26b; --warn-soft: #3a2e14; --focus: #6fd1b5; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 16px; }
@media (min-width: 900px) { html { scroll-padding-top: calc(var(--header-h) + 16px); } }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body { margin: 0; background: var(--bg); color: var(--text); font: var(--fs-16)/1.6 var(--font); overflow-wrap: break-word; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
.wrap { max-width: var(--shell); margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 32px; } }
.skip { position: absolute; left: -9999px; top: 8px; }
.skip:focus { left: 16px; z-index: 20; background: var(--surface); color: var(--text); padding: 8px 16px; border: 2px solid var(--focus); border-radius: var(--radius); }

/* ---------- header ---------- */
header.site { background: color-mix(in srgb, var(--bg) 94%, transparent); border-bottom: 1px solid var(--border); z-index: 10; }
@media (min-width: 900px) { header.site { position: sticky; top: 0; backdrop-filter: blur(8px); } }
.bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 24px; min-height: var(--header-h); padding-top: 8px; padding-bottom: 8px; }
.brand { display: inline-flex; align-items: center; gap: 8px; color: var(--text); text-decoration: none; font-weight: 650; font-size: var(--fs-16); }
.brand .logo { display: block; }
nav.primary { display: flex; flex-wrap: wrap; align-items: center; gap: 0 4px; margin: 0 -8px; }
nav.primary a { color: var(--muted); text-decoration: none; font-size: var(--fs-14); font-weight: 500; padding: 8px; border-radius: 6px; line-height: 1.2; }
nav.primary a:hover { color: var(--text); background: var(--surface-2); }
nav.primary a[aria-current="page"] { color: var(--text); box-shadow: inset 0 -2px 0 var(--accent); border-radius: 0; }
nav.primary a.gh { display: inline-flex; align-items: center; gap: 8px; }
button.theme { display: inline-grid; place-items: center; width: 32px; height: 32px; border: 1px solid var(--border); border-radius: 6px; background: var(--surface); color: var(--muted); cursor: pointer; }
button.theme:hover { color: var(--text); }
.bar-actions { display: inline-flex; align-items: center; gap: 8px; }
button.menu-toggle { display: none; align-items: center; gap: 8px; height: 32px; padding: 0 10px; border: 1px solid var(--border); border-radius: 6px; background: var(--surface); color: var(--text); font: 500 var(--fs-14)/1 inherit; cursor: pointer; }
button.menu-toggle:hover { background: var(--surface-2); }
@media (max-width: 899px) {
  .bar { flex-wrap: wrap; gap: 8px 12px; }
  .brand { flex: 1 1 0; min-width: 0; }
  .brand .brand-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .bar-actions { margin-left: auto; flex: 0 0 auto; }
  html.js .bar-actions { order: 2; }
  html.js nav.primary { order: 3; }
  html.js button.menu-toggle { display: inline-flex; }
  html.js nav.primary { display: none; width: 100%; flex-direction: column; align-items: stretch; gap: 2px; margin: 4px 0 0; padding-top: 8px; border-top: 1px solid var(--border); }
  html.js nav.primary.open { display: flex; }
  nav.primary a { padding: 10px 8px; font-size: var(--fs-16); }
  nav.primary a[aria-current="page"] { box-shadow: inset 3px 0 0 var(--accent); border-radius: 0; }
  html:not(.js) nav.primary { width: 100%; }
}
@media (max-width: 419px) { .brand .brand-name { display: none; } }

/* ---------- main and type ---------- */
main.wrap { padding-top: 32px; padding-bottom: 64px; }
.status { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 16px; font: 600 var(--fs-14)/1 var(--mono); color: var(--warn); background: var(--warn-soft); padding: 8px 12px; border-radius: 999px; }
.status .dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
h1, h2, h3 { line-height: 1.2; text-wrap: balance; letter-spacing: -0.01em; }
h1 { font-size: var(--fs-28); margin: 8px 0 16px; }
h2 { font-size: var(--fs-22); margin: 48px 0 16px; }
h3 { font-size: var(--fs-18); margin: 32px 0 8px; }
h4 { font-size: var(--fs-16); line-height: 1.3; margin: 24px 0 8px; }
@media (min-width: 720px) {
  h1 { font-size: var(--fs-40); }
  h2 { font-size: var(--fs-28); margin-top: 64px; }
}
h2 a.anchor, h3 a.anchor, h4 a.anchor { color: var(--muted); text-decoration: none; font-weight: 400; opacity: 0; padding: 0 4px; }
h2:hover a.anchor, h3:hover a.anchor, h4:hover a.anchor, a.anchor:focus-visible { opacity: 1; }
@media (hover: none) { h2 a.anchor, h3 a.anchor, h4 a.anchor { opacity: .5; } }
p, li, dd { max-width: var(--prose); }
.lede { font-size: var(--fs-18); color: var(--muted); max-width: 60ch; }
.muted { color: var(--muted); }
.small { font-size: var(--fs-14); }
.coming { font: 600 12px/1 var(--mono); color: var(--warn); background: var(--warn-soft); padding: 4px 8px; border-radius: 4px; margin-left: 4px; white-space: nowrap; vertical-align: middle; letter-spacing: 0; }

/* ---------- code ---------- */
code { font: 0.875em/1.4 var(--mono); background: var(--code-bg); padding: 1px 4px; border-radius: 4px; overflow-wrap: anywhere; }
code.id { display: inline-block; max-width: 100%; overflow-x: auto; white-space: nowrap; overflow-wrap: normal; vertical-align: bottom; }
figure.code { margin: 16px 0 24px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--code-bg); max-width: 100%; min-width: 0; }
figure.code figcaption { display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 40px; font: var(--fs-14)/1.4 var(--mono); padding: 4px 8px 4px 16px; border-bottom: 1px solid var(--border); color: var(--muted); }
figure.code figcaption .file { min-width: 0; overflow-wrap: anywhere; }
pre { margin: 0; padding: 16px; overflow-x: auto; font: 14px/1.6 var(--mono); }
pre code { background: none; padding: 0; overflow-wrap: normal; font-size: inherit; }
button.copy { flex: none; font: 600 12px/1 var(--font); color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 8px 12px; cursor: pointer; }
button.copy:hover { border-color: var(--accent); }
button.copy[data-done] { color: var(--accent); border-color: var(--accent); }

/* ---------- tabs ---------- */
.tabs { margin: 16px 0 24px; }
.tablist { display: none; }
.js .tablist { display: flex; flex-wrap: wrap; gap: 0 4px; border-bottom: 1px solid var(--border); scrollbar-width: thin; }
.tablist [role="tab"] { flex: none; font: 500 var(--fs-14)/1.2 var(--font); color: var(--muted); background: none; border: 0; border-bottom: 2px solid transparent; padding: 12px 16px; cursor: pointer; margin-bottom: -1px; }
.tablist [role="tab"]:hover { color: var(--text); }
.tablist [role="tab"][aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); font-weight: 650; }
.js .tabs .tabpanel figure.code { margin-top: 16px; }
.tabpanel[hidden] { display: none; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; margin: 16px 0 24px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: var(--fs-14); }
th, td { text-align: left; vertical-align: top; padding: 12px 16px; border-bottom: 1px solid var(--border); }
th { background: var(--surface-2); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
@media (max-width: 640px) {
  .table-wrap { overflow-x: visible; }
  .table-wrap thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .table-wrap tr { display: block; padding: 8px 0; border-bottom: 1px solid var(--border); }
  .table-wrap tr:last-child { border-bottom: 0; }
  .table-wrap td { display: block; border: 0; padding: 4px 16px; }
  .table-wrap td::before { content: attr(data-label); display: block; font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
  .table-wrap td:first-child { font-weight: 600; }
}

/* ---------- cards and grids ---------- */
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin: 16px 0 8px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 24px 24px; }
.card h3 { margin: 0 0 8px; font-size: var(--fs-18); }
.card p { margin: 0; color: var(--muted); font-size: var(--fs-16); }
.card p + p { margin-top: 8px; }
.card .tag { display: inline-block; font: 600 12px/1 var(--mono); color: var(--accent); background: var(--accent-soft); padding: 4px 8px; border-radius: 4px; margin: 8px 0; }
.card p.go { margin: 16px 0 0; font-weight: 600; }

/* ---------- home ---------- */
.hero { padding: 16px 0 8px; }
.hero h1 { margin-bottom: 16px; }
.hero .what { font-size: var(--fs-22); line-height: 1.4; max-width: 34ch; margin: 0 0 8px; font-weight: 500; }
.hero .who { font-size: var(--fs-18); color: var(--muted); max-width: 56ch; margin: 0; }
@media (min-width: 720px) { .hero .what { font-size: var(--fs-28); } }
.cta { display: flex; flex-wrap: wrap; gap: 8px 16px; margin: 24px 0 0; }
.btn { display: inline-flex; align-items: center; min-height: 48px; padding: 8px 24px; border-radius: var(--radius); border: 1px solid var(--border); text-decoration: none; color: var(--text); background: var(--surface); font-weight: 600; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.proof { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 0; margin: 40px 0 0; padding: 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.proof div { padding: 16px; box-shadow: 1px 1px 0 var(--border); }
.proof dt { font-size: var(--fs-14); color: var(--muted); }
.proof dd { margin: 4px 0 0; font-weight: 650; }
.steps { counter-reset: step; list-style: none; padding: 0; display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); margin: 16px 0 24px; }
.steps li { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 24px 24px; max-width: none; }
.steps li::before { counter-increment: step; content: counter(step); display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font: 700 var(--fs-14)/1 var(--mono); margin-bottom: 8px; }
.steps h3 { margin: 0 0 8px; }
.steps p { margin: 0; color: var(--muted); }
.diagram { margin: 24px 0; padding: 16px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.diagram svg.narrow { display: none; max-width: 400px; }
@media (max-width: 639px) { .diagram svg.wide { display: none; } .diagram svg.narrow { display: block; } }
.diagram svg { display: block; width: 100%; height: auto; max-width: 880px; margin: 0 auto; }
.diagram figcaption { font-size: var(--fs-14); color: var(--muted); margin-top: 8px; text-align: center; }
.d-line { stroke: var(--border); }
.d-box { fill: var(--surface-2); stroke: var(--border); }
.d-moment { fill: var(--accent); }
.d-accent { fill: var(--accent); }
.d-arrow { stroke: var(--muted); fill: none; }
.d-head { fill: var(--muted); }
.d-text { fill: var(--text); font: 600 18px var(--font); }
.d-sub { fill: var(--muted); font: 15px var(--mono); }
.d-on { fill: var(--on-accent); }
.faq-teaser h3 { margin-top: 24px; }

/* ---------- spec layout ---------- */
.doc { display: block; }
@media (min-width: 1024px) {
  .doc { display: grid; grid-template-columns: 248px minmax(0, 1fr); gap: 48px; align-items: start; }
  .doc > .toc { position: sticky; top: calc(var(--header-h) + 16px); max-height: calc(100vh - var(--header-h) - 32px); overflow-y: auto; margin: 0; }
  .doc > .toc summary { pointer-events: none; }
  .doc > .toc summary::marker, .doc > .toc summary::-webkit-details-marker { display: none; content: ""; }
}
.doc article { min-width: 0; }
details.toc { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 8px 16px; margin: 16px 0 24px; font-size: var(--fs-14); }
details.toc summary { font-weight: 650; cursor: pointer; padding: 8px 0; list-style-position: inside; }
details.toc ol { list-style: none; margin: 0 0 8px; padding: 0; }
details.toc ol ol { padding-left: 16px; }
details.toc li { margin: 0; max-width: none; }
details.toc a { display: block; padding: 4px 8px; margin: 0 -8px; color: var(--muted); text-decoration: none; border-radius: 4px; line-height: 1.4; }
details.toc a:hover { color: var(--text); background: var(--surface-2); }
details.toc a[aria-current="true"] { color: var(--accent); font-weight: 600; background: var(--accent-soft); }
.docmeta { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 4px 16px; margin: 16px 0 24px; padding: 16px 24px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); font-size: var(--fs-14); max-width: var(--prose); }
.docmeta dt { color: var(--muted); }
.docmeta dd { margin: 0; overflow-wrap: anywhere; }
.docmeta select { font: inherit; color: var(--text); background: var(--surface-2); border: 1px solid var(--border); border-radius: 4px; padding: 4px 8px; }
@media (max-width: 479px) { .docmeta { grid-template-columns: 1fr; } .docmeta dd { margin-bottom: 8px; } }
ol.checks { padding-left: 24px; }
ol.checks li { margin: 4px 0; }
dl.glossary { margin: 16px 0 24px; max-width: var(--prose); }
dl.glossary dt { font-weight: 650; margin-top: 16px; }
dl.glossary dd { margin: 4px 0 0; color: var(--muted); }
section.qa { margin: 0 0 8px; }
section.qa h3 { margin-top: 32px; }
.cite { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 24px; max-width: var(--prose); }
.changelog { list-style: none; padding: 0; margin: 16px 0; max-width: var(--prose); }
.changelog > li { border-left: 2px solid var(--border); padding: 0 0 24px 24px; position: relative; max-width: none; }
.changelog > li::before { content: ""; position: absolute; left: -7px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); }
.changelog time, .changelog .when { font: 600 var(--fs-14)/1.4 var(--mono); color: var(--muted); }
.changelog h2 { margin: 4px 0 8px; font-size: var(--fs-22); }
.changelog ul { margin: 0; padding-left: 24px; }
.callout { background: var(--accent-soft); border-radius: var(--radius); padding: 16px 24px; margin: 24px 0; max-width: var(--prose); }
.callout p { margin: 0; }
.callout p + p { margin-top: 8px; }

/* ---------- footer ---------- */
footer.site { border-top: 1px solid var(--border); background: var(--surface); }
.foot { padding-top: 24px; padding-bottom: 32px; font-size: var(--fs-14); color: var(--muted); }
.foot p { margin: 4px 0; }
.foot-cols { display: grid; gap: 16px 48px; }
@media (min-width: 900px) { .foot-cols { grid-template-columns: minmax(0, 1fr) auto; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}