/* docs.sign.yt. Brand tokens follow the sign.yt marketing site (ink + electric blue). */
:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #f4f5f8;
  --surface-2: #eef0f4;
  --text: #0c0f1a;
  --body: #2b3045;
  --muted: #4a5068;
  --rule: #e1e4eb;
  --rule-strong: #c9cdd8;
  --accent: #1b2bff;
  --accent-hover: #0f1ab8;
  --accent-soft: #eef0f4;
  --nav-active-bg: #eef0f4;
  --nav-active-text: #0c0f1a;
  --topbar: #0c0f1a;
  --topbar-text: #f3f4f8;
  --topbar-muted: #b8bdd0;
  --code-bg: #111111;
  --code-text: #e6e8ef;
  --code-rule: #262626;
  --inline-code: #eef0f4;
  --tok-c: #8e96b3;
  --tok-s: #9fe3b4;
  --tok-k: #b9a5ff;
  --tok-n: #ffc48a;
  --note-bg: #f4f5f8;
  --note-rule: #1b2bff;
  --warn-bg: #fff5e6;
  --warn-rule: #b26200;
  --focus: #1b2bff;
  --shadow: 0 12px 32px rgba(12, 15, 26, 0.14);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --nav-active-bg: #262626;
    --nav-active-text: #fafafa;
    --bg: #141414;
    --surface: #1a1a1a;
    --surface-2: #222222;
    --text: #f4f4f5;
    --body: #d4d4d8;
    --muted: #a1a1aa;
    --rule: #2a2a2a;
    --rule-strong: #3a3a3a;
    --accent: #6b9bff;
    --accent-hover: #9dbcff;
    --accent-soft: #262626;
    --topbar: #0a0a0a;
    --code-bg: #0f0f0f;
    --code-rule: #262626;
    --inline-code: #222222;
    --note-bg: #1c1f26;
    --note-rule: #6b9bff;
    --warn-bg: #2a1f0f;
    --warn-rule: #f0a23c;
    --focus: #6b9bff;
    --shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --nav-active-bg: #262626;
  --nav-active-text: #fafafa;
  --bg: #141414;
  --surface: #1a1a1a;
  --surface-2: #222222;
  --text: #f4f4f5;
  --body: #d4d4d8;
  --muted: #a1a1aa;
  --rule: #2a2a2a;
  --rule-strong: #3a3a3a;
  --accent: #6b9bff;
  --accent-hover: #9dbcff;
  --accent-soft: #262626;
  --topbar: #0a0a0a;
  --code-bg: #0f0f0f;
  --code-rule: #262626;
  --inline-code: #222222;
  --note-bg: #1c1f26;
  --note-rule: #6b9bff;
  --warn-bg: #2a1f0f;
  --warn-rule: #f0a23c;
  --focus: #6b9bff;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font: 16px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { color: var(--accent-hover); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 3px; }
.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 {
  position: absolute; left: 12px; top: -48px; z-index: 100; padding: 8px 14px;
  background: var(--accent); color: #fff; border-radius: 3px; font-weight: 600;
}
.skip:focus { top: 10px; color: #fff; }
main:focus { outline: none; }

/* Top bar */
.topbar {
  position: sticky; top: 0; z-index: 40; background: var(--topbar); color: var(--topbar-text);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.topbar-inner {
  display: flex; align-items: center; gap: 12px; height: 56px; padding: 0 16px;
  max-width: 1440px; margin: 0 auto;
}
.topbar :focus-visible { outline-color: #6b9bff; }
.brand {
  display: flex; align-items: center; gap: 9px; color: var(--topbar-text); text-decoration: none;
  font-weight: 800; letter-spacing: -0.02em; font-size: 18px; white-space: nowrap;
}
.brand:hover { color: #fff; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px;
  border-radius: 3px; background: #1b2bff; color: #fff; flex: none;
}
.brand-docs {
  font-weight: 600; font-size: 13px; color: var(--topbar-muted); border-left: 1px solid #3a3a3a;
  padding-left: 9px; letter-spacing: 0;
}
.search { position: relative; flex: 1; max-width: 420px; margin-left: auto; }
.search input {
  width: 100%; height: 36px; padding: 0 34px 0 12px; border-radius: 6px; font: inherit; font-size: 14px;
  border: 1px solid #333333; background: #1c1c1c; color: #f3f4f8;
}
.search input::placeholder { color: #a1a1aa; }
.search input:focus { outline: 2px solid #6b9bff; outline-offset: 1px; border-color: transparent; }
.search-kbd {
  position: absolute; right: 8px; top: 8px; font: 12px/18px var(--mono); padding: 0 6px;
  border: 1px solid #3a3a3a; border-radius: 4px; color: #b8bdd0;
}
.search-results {
  position: absolute; top: 42px; left: 0; right: 0; margin: 0; padding: 6px; list-style: none;
  background: var(--bg); color: var(--body); border: 1px solid var(--rule-strong); border-radius: 8px;
  box-shadow: var(--shadow); max-height: min(70vh, 520px); overflow-y: auto; min-width: min(420px, calc(100vw - 32px));
}
.search-results li a {
  display: block; padding: 8px 10px; border-radius: 5px; text-decoration: none; color: var(--body);
}
.search-results li[aria-selected="true"] a, .search-results li a:hover { background: var(--accent-soft); }
.sr-title { display: block; font-weight: 600; color: var(--text); font-size: 14px; }
.sr-section { display: block; font-size: 12px; color: var(--muted); }
.sr-text { display: block; font-size: 13px; color: var(--muted); margin-top: 2px; }
.search-empty { padding: 10px; color: var(--muted); font-size: 14px; }
.topnav { display: flex; gap: 18px; }
.topnav a { color: var(--topbar-muted); text-decoration: none; font-size: 14px; font-weight: 500; white-space: nowrap; }
.topnav a:hover, .topnav a[aria-current="page"] { color: #fff; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; flex: none;
  border: 1px solid #333333; border-radius: 6px; background: transparent; color: var(--topbar-text); cursor: pointer;
}
.icon-btn:hover { background: #1f1f1f; }
.theme-btn .i-moon { display: none; }
:root[data-theme="dark"] .theme-btn .i-sun { display: none; }
:root[data-theme="dark"] .theme-btn .i-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-btn .i-sun { display: none; }
  :root:not([data-theme="light"]) .theme-btn .i-moon { display: block; }
}
.menu-btn { display: none; }

/* Shell */
.shell {
  display: grid; grid-template-columns: 264px minmax(0, 1fr) 224px; max-width: 1440px; margin: 0 auto;
}
.sidebar {
  position: sticky; top: 56px; align-self: start; height: calc(100vh - 56px); overflow-y: auto;
  padding: 24px 16px 40px; border-right: 1px solid var(--rule); background: var(--surface);
}
.nav-group + .nav-group { margin-top: 22px; }
.nav-title {
  margin: 0 0 6px 10px; font-size: 12px; font-weight: 700; letter-spacing: 0.07em; text-transform: uppercase;
  color: var(--muted);
}
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar a {
  display: block; padding: 5px 10px; border-radius: 5px; color: var(--body); text-decoration: none;
  font-size: 14.5px; line-height: 1.45;
}
.sidebar a:hover { background: var(--surface-2); color: var(--text); }
.sidebar a[aria-current="page"] {
  background: var(--nav-active-bg); color: var(--nav-active-text); font-weight: 600;
  box-shadow: inset 2px 0 0 var(--nav-active-text);
}
.content { min-width: 0; padding: 36px 48px 64px; }
.wide { min-width: 0; }
.toc {
  position: sticky; top: 56px; align-self: start; max-height: calc(100vh - 56px); overflow-y: auto;
  padding: 36px 16px 24px 8px; font-size: 13.5px;
}
.toc-title { margin: 0 0 8px; font-size: 12px; font-weight: 700; letter-spacing: 0.07em; text-transform: uppercase; color: var(--muted); }
.toc ul { list-style: none; padding: 0; margin: 0; border-left: 1px solid var(--rule); }
.toc a { display: block; padding: 3px 0 3px 12px; color: var(--muted); text-decoration: none; line-height: 1.4; }
.toc a:hover { color: var(--accent); }
.toc .toc-l3 a { padding-left: 24px; }
.scrim { display: none; }

/* Prose */
.prose { max-width: 780px; }
.crumb { margin: 0 0 4px; font-size: 13px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); }
.prose h1 { margin: 0 0 12px; font-size: clamp(30px, 4.4vw, 40px); line-height: 1.12; letter-spacing: -0.03em; color: var(--text); font-weight: 800; }
.prose h2 { margin: 48px 0 12px; font-size: 25px; line-height: 1.25; letter-spacing: -0.02em; color: var(--text); padding-top: 18px; border-top: 1px solid var(--rule); }
.prose h3 { margin: 30px 0 8px; font-size: 19px; line-height: 1.3; color: var(--text); }
.prose h2, .prose h3 { position: relative; }
.anchor { margin-left: 8px; color: var(--rule-strong); text-decoration: none; font-weight: 400; opacity: 0; }
h2:hover .anchor, h3:hover .anchor, .anchor:focus { opacity: 1; }
.prose .lead { font-size: 18.5px; color: var(--muted); margin-top: 0; }
.prose p, .prose ul, .prose ol { margin: 0 0 16px; }
.prose li { margin: 4px 0; }
.prose li > ul, .prose li > ol { margin: 4px 0 0; }
.prose strong { color: var(--text); }
.prose :not(pre) > code {
  font: 0.86em var(--mono); background: var(--inline-code); padding: 2px 5px; border-radius: 4px;
  overflow-wrap: anywhere; color: var(--text);
}
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 32px 0; }
.table-wrap { overflow-x: auto; margin: 0 0 20px; border: 1px solid var(--rule); border-radius: 8px; }
.prose table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
.prose th, .prose td { padding: 9px 12px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--rule); }
.prose tr:last-child td { border-bottom: 0; }
.prose th { background: var(--surface); color: var(--text); font-weight: 600; white-space: nowrap; }
.prose td code { white-space: nowrap; }
.note, .warn {
  margin: 0 0 20px; padding: 12px 16px; border-left: 3px solid var(--note-rule); background: var(--note-bg);
  border-radius: 0 6px 6px 0;
}
.warn { border-left-color: var(--warn-rule); background: var(--warn-bg); }
.note > :last-child, .warn > :last-child { margin-bottom: 0; }
.badge {
  display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: var(--accent-soft); color: var(--accent); vertical-align: middle;
}
.steps { counter-reset: step; list-style: none; padding-left: 0; }
.steps > li { counter-increment: step; position: relative; padding-left: 40px; margin: 12px 0; }
.steps > li::before {
  content: counter(step); position: absolute; left: 0; top: 0; width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent); color: #fff; font-size: 13px; font-weight: 700; display: flex; align-items: center; justify-content: center;
}

/* Code */
.code { position: relative; margin: 0 0 20px; }
.code-title {
  font: 12.5px var(--mono); color: #b8bdd0; background: #1c1c1c; padding: 8px 14px;
  border-radius: 8px 8px 0 0; border: 1px solid var(--code-rule); border-bottom: 0;
}
.code pre {
  margin: 0; padding: 16px 18px; overflow-x: auto; background: var(--code-bg); color: var(--code-text);
  border: 1px solid var(--code-rule); border-radius: 8px; font: 13.5px/1.6 var(--mono); tab-size: 2;
}
.code-title + .copy-btn + pre, .code-title + pre { border-radius: 0 0 8px 8px; }
.code pre code { font: inherit; background: none; padding: 0; color: inherit; }
.tok-c { color: var(--tok-c); font-style: italic; }
.tok-s { color: var(--tok-s); }
.tok-k { color: var(--tok-k); }
.tok-n { color: var(--tok-n); }
.copy-btn {
  position: absolute; right: 8px; bottom: calc(100% - 38px); z-index: 1; padding: 3px 10px;
  font: 600 12px var(--sans); color: #e4e4e7; background: #262626; border: 1px solid #3a3a3a;
  border-radius: 5px; cursor: pointer; opacity: 0.85;
}
.code-title ~ .copy-btn { bottom: auto; top: 40px; }
.copy-btn:hover, .copy-btn:focus-visible { opacity: 1; color: #fff; }
.tabs { margin: 0 0 20px; }
.tabs .code { margin: 0; }
.tablist {
  display: flex; gap: 2px; overflow-x: auto; background: #1c1c1c; border: 1px solid var(--code-rule);
  border-bottom: 0; border-radius: 8px 8px 0 0; padding: 4px 4px 0;
}
.tablist button {
  font: 600 13px var(--sans); padding: 7px 12px 8px; border: 0; background: transparent; color: #a1a1aa;
  cursor: pointer; border-radius: 5px 5px 0 0; white-space: nowrap; border-bottom: 2px solid transparent;
}
.tablist button:hover { color: #fff; }
.tablist button[aria-selected="true"] { color: #fff; border-bottom-color: #ffffff; }
.tablist button:focus-visible { outline: 2px solid #6b9bff; outline-offset: -2px; }
.tabs pre, .tabs .code-title { border-top-left-radius: 0; border-top-right-radius: 0; }

/* Cards (home) */
.hero { padding: 8px 0 8px; }
.hero h1 { font-size: clamp(34px, 5.5vw, 52px); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin: 0 0 28px; }
.card {
  display: block; padding: 16px 18px; border: 1px solid var(--rule); border-radius: 8px; text-decoration: none;
  color: var(--body); background: var(--bg); transition: border-color 0.15s;
}
.card:hover { border-color: var(--accent); color: var(--body); }
.card strong { display: block; color: var(--text); margin-bottom: 4px; font-size: 15.5px; }
.card span { font-size: 14px; color: var(--muted); line-height: 1.5; display: block; }

/* Pager + footer */
.pager { display: flex; justify-content: space-between; gap: 14px; max-width: 780px; margin-top: 56px; }
.pager a {
  flex: 1; display: block; padding: 12px 16px; border: 1px solid var(--rule); border-radius: 8px;
  text-decoration: none; font-weight: 600; color: var(--text);
}
.pager a:hover { border-color: var(--accent); }
.pager span { display: block; font-size: 12px; font-weight: 500; color: var(--muted); }
.pager-next { text-align: right; }
.footer { border-top: 1px solid var(--rule); background: var(--surface); }
.footer-inner {
  max-width: 1440px; margin: 0 auto; padding: 24px 16px; display: flex; flex-wrap: wrap; align-items: center;
  gap: 12px 28px; font-size: 14px;
}
.footer-brand { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--text); }
.footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.footer nav a { color: var(--muted); text-decoration: none; }
.footer nav a:hover { color: var(--accent); }
.footer-legal { margin: 0 0 0 auto; color: var(--muted); }

/* API reference page */
.api-bar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; padding: 12px 16px; border-bottom: 1px solid var(--rule);
  background: var(--surface); font-size: 14px;
}
.api-bar h1 { margin: 0; font-size: 17px; color: var(--text); }
#redoc { min-height: 70vh; background: var(--bg); }
.redoc-fallback { padding: 24px 16px; }

/* Responsive */
@media (max-width: 1200px) {
  .shell { grid-template-columns: 248px minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 900px) {
  .shell { display: block; }
  .menu-btn { display: inline-flex; }
  .sidebar {
    position: fixed; top: 56px; left: 0; bottom: 0; z-index: 35; width: min(300px, 86vw); height: auto;
    transform: translateX(-102%); transition: transform 0.2s ease; box-shadow: var(--shadow); visibility: hidden;
  }
  .nav-open .sidebar { transform: none; visibility: visible; }
  .nav-open .scrim { display: block; position: fixed; inset: 56px 0 0; z-index: 30; background: rgba(5, 7, 14, 0.5); }
  .content { padding: 24px 16px 48px; }
  .topnav { display: none; }
}
@media (max-width: 560px) {
  .brand-docs, .search-kbd { display: none; }
  .topbar-inner { gap: 8px; padding: 0 12px; }
  .brand-name { display: none; }
  .search-results { position: fixed; top: 52px; left: 8px; right: 8px; min-width: 0; }
  .pager { flex-direction: column; }
  .footer-legal { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}