/* usend docs. Light by default, dark via the system setting or the theme switch (html[data-theme]). */
@font-face { font-family: "Geist"; src: url("/fonts/geist.woff2") format("woff2"); font-weight: 100 900; font-display: swap; }
@font-face { font-family: "Geist Mono"; src: url("/fonts/geist-mono.woff2") format("woff2"); font-weight: 100 900; font-display: swap; }
/* usend brand: warm paper, charcoal and one yellow accent (same as the landing page and dashboard). */
:root { --bg: #f5f2ed; --fg: #161616; --muted: #6f6b63; --faint: #8f8a80; --card: #fdfcf9; --soft: #ece8e3; --border: #ddd7ce; --primary: #161616; --primary-fg: #161616; --primary-soft: rgb(246 227 124 / 0.55); --yellow: #f6e37c; --code-bg: #262626; --code-bar: #2f2f2e; --code-fg: #ecebe6; --note: #2d5aa6; --tip: #3f7d3a; --warn: #a8641a; --radius: 6px; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --bg: #1c1c1b; --fg: #ecebe6; --muted: #a19e96; --faint: #85827b; --card: #242423; --soft: #2a2a29; --border: #393836; --primary: #f6e37c; --primary-fg: #161616; --primary-soft: rgb(246 227 124 / 0.14); --code-bg: #161616; --code-bar: #20201f; --note: #7fa6e6; --tip: #7cc272; --warn: #e3a253; }
}
:root[data-theme="dark"] { --bg: #1c1c1b; --fg: #ecebe6; --muted: #a19e96; --faint: #85827b; --card: #242423; --soft: #2a2a29; --border: #393836; --primary: #f6e37c; --primary-fg: #161616; --primary-soft: rgb(246 227 124 / 0.14); --code-bg: #161616; --code-bar: #20201f; --note: #7fa6e6; --tip: #7cc272; --warn: #e3a253; }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 80px; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 15px/1.7 "Geist", ui-sans-serif, system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: inherit; }
code, pre, kbd { font-family: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace; }
svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* header */
.top { position: sticky; top: 0; z-index: 30; height: 60px; display: flex; align-items: center; gap: 16px; padding: 0 20px;
  border-bottom: 1px solid var(--border); background: color-mix(in oklch, var(--bg) 82%, transparent); backdrop-filter: saturate(160%) blur(12px); }
.brand { display: flex; align-items: baseline; gap: 8px; font-weight: 700; letter-spacing: -0.06em; font-size: 20px; text-decoration: none; white-space: nowrap; }
.brand-sub { color: var(--muted); font-weight: 500; padding-left: 9px; border-left: 1px solid var(--border); }
.brand-dot { width: 0.28em; height: 0.28em; background: var(--fg); display: inline-block; margin-left: 0.12em; }
:root[data-theme="dark"] .brand-dot { background: #f6e37c; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .brand-dot { background: #f6e37c; } }
.search { margin-left: 24px; flex: 0 1 340px; display: flex; align-items: center; gap: 8px; height: 36px; padding: 0 10px; border-radius: 9px;
  border: 1px solid var(--border); background: var(--soft); color: var(--muted); font: inherit; font-size: 13.5px; cursor: pointer; text-align: left; }
.search span { flex: 1; }
kbd { font-size: 11px; padding: 1px 6px; border-radius: 5px; border: 1px solid var(--border); background: var(--card); color: var(--muted); }
.top-links { margin-left: auto; display: flex; align-items: center; gap: 18px; font-size: 14px; }
.top-links a:not(.btn) { text-decoration: none; color: var(--muted); }
.top-links a:not(.btn):hover { color: var(--fg); }
.btn { display: inline-flex; align-items: center; height: 34px; padding: 0 14px; border-radius: 4px; background: var(--yellow, #f6e37c); color: #161616; border: 1px solid #161616;
  font-weight: 600; font-size: 13.5px; text-decoration: none; }
.theme, .menu { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--border); background: var(--card); color: var(--muted); cursor: pointer; }
.menu { display: none; }

/* layout */
.shell { display: grid; grid-template-columns: 260px minmax(0, 1fr) 220px; max-width: 1440px; margin: 0 auto; }
.sidebar { position: sticky; top: 60px; height: calc(100vh - 60px); overflow-y: auto; padding: 24px 16px 40px 20px; border-right: 1px solid var(--border); }
.nav-group { margin-bottom: 22px; }
.nav-title { font-size: 12px; font-weight: 650; text-transform: uppercase; letter-spacing: .06em; color: var(--faint); margin: 0 0 6px 10px; }
.sidebar a { display: block; padding: 5px 10px; border-radius: 7px; font-size: 14px; color: var(--muted); text-decoration: none; }
.sidebar a:hover { color: var(--fg); background: var(--soft); }
.sidebar a[aria-current="page"] { color: var(--fg); background: var(--primary-soft); font-weight: 500; }
.content { min-width: 0; padding: 40px 56px 80px; }
article { max-width: 760px; margin: 0 auto; }
.kicker { font-size: 13px; font-weight: 500; color: var(--muted); }
h1 { font-size: 38px; line-height: 1.1; letter-spacing: -0.045em; font-weight: 500; margin: 6px 0 10px; }
.lead { font-size: 17px; color: var(--muted); margin: 0 0 30px; }
.toc { position: sticky; top: 60px; height: calc(100vh - 60px); overflow-y: auto; padding: 32px 20px 40px 8px; font-size: 13px; }
.toc-title { font-weight: 650; margin-bottom: 8px; font-size: 12.5px; }
.toc a { display: block; padding: 3px 0 3px 10px; color: var(--muted); text-decoration: none; border-left: 1px solid var(--border); }
.toc a.d3 { padding-left: 22px; }
.toc a:hover { color: var(--fg); }
.toc a.active { color: var(--primary); border-left-color: var(--primary); }

/* prose */
.prose > :first-child { margin-top: 0; }
.prose h2 { font-size: 23px; letter-spacing: -0.025em; margin: 44px 0 12px; padding-top: 8px; }
.prose h3 { font-size: 17px; margin: 30px 0 8px; }
.prose h2, .prose h3 { position: relative; }
.anchor { position: absolute; left: -22px; color: var(--faint); text-decoration: none; opacity: 0; font-weight: 400; }
.prose h2:hover .anchor, .prose h3:hover .anchor { opacity: 1; }
.prose p, .prose ul, .prose ol { margin: 0 0 16px; }
.prose li { margin: 4px 0; }
.prose a { color: var(--primary); text-decoration: underline; text-decoration-color: color-mix(in oklch, var(--primary) 35%, transparent); text-underline-offset: 3px; }
.prose a:hover { text-decoration-color: var(--primary); }
.prose :not(pre) > code { font-size: 0.86em; padding: 2px 6px; border-radius: 6px; background: var(--soft); border: 1px solid var(--border); white-space: nowrap; }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 32px 0; }
.prose blockquote { margin: 0 0 16px; padding: 4px 16px; border-left: 3px solid var(--border); color: var(--muted); }
.table { overflow-x: auto; margin: 0 0 20px; border: 1px solid var(--border); border-radius: var(--radius); }
.table table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th { text-align: left; font-weight: 600; background: var(--soft); }
.table th, .table td { padding: 9px 14px; border-top: 1px solid var(--border); vertical-align: top; }
.table thead th { border-top: 0; }
.table td code { white-space: nowrap; }

/* code */
.code { margin: 0 0 20px; border-radius: var(--radius); overflow: hidden; background: var(--code-bg); border: 1px solid color-mix(in oklch, var(--border) 70%, transparent); }
.code-bar { display: flex; align-items: center; justify-content: space-between; padding: 6px 8px 6px 14px; background: var(--code-bar); color: #a19e96; font-size: 12px; font-weight: 600; }
.copy { border: 0; background: transparent; color: #a19e96; font: 500 12px/1 "Geist Mono", ui-monospace, monospace; padding: 6px 8px; border-radius: 6px; cursor: pointer; }
.copy:hover { background: rgb(255 255 255 / 0.08); color: #fff; }
.code pre { margin: 0; padding: 14px 16px 16px; overflow-x: auto; font-size: 13px; line-height: 1.65; color: var(--code-fg); }
.tabs { margin: 0 0 20px; border-radius: var(--radius); overflow: hidden; background: var(--code-bg); }
.tabs .code { margin: 0; border: 0; border-radius: 0; }
.tabs .code-bar { display: none; }
.tab-list { display: flex; align-items: center; gap: 2px; padding: 6px; background: var(--code-bar); overflow-x: auto; }
.tab-list .copy { margin-left: auto; }
.tab-list button { border: 0; background: transparent; color: #a19e96; font: 500 12.5px/1 "Geist Mono", ui-monospace, monospace; padding: 8px 11px; border-radius: 7px; cursor: pointer; white-space: nowrap; }
.tab-list button[aria-selected="true"] { background: rgb(255 255 255 / 0.1); color: #fff; }
.tabs .tab-panel pre { padding-top: 16px; }
.hljs-keyword, .hljs-built_in, .hljs-literal { color: #f6e37c; }
.hljs-string, .hljs-attr + .hljs-string { color: #b5d99c; }
.hljs-title, .hljs-title.function_ { color: #9fc3ef; }
.hljs-number { color: #e3a253; }
.hljs-comment { color: #85827b; font-style: italic; }
.hljs-attr, .hljs-property { color: #e6dcc0; }
.hljs-variable, .hljs-params { color: #ecebe6; }
.hljs-meta, .hljs-section { color: #9fc3ef; }

/* callouts and cards */
.callout { margin: 0 0 20px; padding: 12px 16px; border-radius: var(--radius); border: 1px solid; font-size: 14.5px; }
.callout > :last-child { margin-bottom: 0; }
.callout-title { font-weight: 650; font-size: 13px; margin-bottom: 4px; }
.callout.note { border-color: color-mix(in oklch, var(--note) 35%, transparent); background: color-mix(in oklch, var(--note) 7%, transparent); }
.callout.note .callout-title { color: var(--note); }
.callout.tip { border-color: color-mix(in oklch, var(--tip) 35%, transparent); background: color-mix(in oklch, var(--tip) 7%, transparent); }
.callout.tip .callout-title { color: var(--tip); }
.callout.warning { border-color: color-mix(in oklch, var(--warn) 45%, transparent); background: color-mix(in oklch, var(--warn) 9%, transparent); }
.callout.warning .callout-title { color: color-mix(in oklch, var(--warn) 80%, var(--fg)); }
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 0 0 24px; }
.card-link { display: block; padding: 16px 18px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--card); text-decoration: none !important; transition: border-color .15s, transform .15s; }
.card-link:hover { border-color: var(--primary); transform: translateY(-1px); }
.card-link strong { display: block; color: var(--fg); margin-bottom: 2px; }
.card-link span { color: var(--muted); font-size: 14px; }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--border); }
.pager a { display: block; padding: 14px 16px; border-radius: var(--radius); border: 1px solid var(--border); text-decoration: none; font-weight: 600; }
.pager a:hover { border-color: var(--primary); }
.pager a span { display: block; font-size: 12px; font-weight: 500; color: var(--muted); }
.pager .next { text-align: right; grid-column: 2; }

/* search */
.search-modal { position: fixed; inset: 0; z-index: 50; background: rgb(10 10 20 / 0.45); backdrop-filter: blur(3px); display: flex; justify-content: center; padding: 12vh 16px 16px; }
.search-modal[hidden] { display: none; }
.search-box { width: 100%; max-width: 620px; max-height: 70vh; display: flex; flex-direction: column; border-radius: 14px; overflow: hidden; background: var(--card); border: 1px solid var(--border); box-shadow: 0 30px 80px -20px rgb(0 0 0 / .5); }
.search-box input { border: 0; border-bottom: 1px solid var(--border); background: transparent; color: var(--fg); font: inherit; font-size: 16px; padding: 16px 18px; outline: none; }
.search-results { overflow-y: auto; padding: 6px; }
.search-results a { display: block; padding: 10px 12px; border-radius: 9px; text-decoration: none; }
.search-results a[aria-selected="true"], .search-results a:hover { background: var(--primary-soft); }
.search-results .r-title { font-weight: 600; font-size: 14px; }
.search-results .r-sub { font-size: 12.5px; color: var(--muted); }
.search-results mark { background: color-mix(in oklch, var(--primary) 22%, transparent); color: inherit; border-radius: 3px; }
.search-empty { padding: 22px; text-align: center; color: var(--muted); font-size: 14px; }
.search-foot { display: flex; gap: 16px; padding: 10px 14px; border-top: 1px solid var(--border); font-size: 12px; color: var(--muted); }

@media (max-width: 1200px) { .shell { grid-template-columns: 240px minmax(0, 1fr); } .toc { display: none; } }
@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .menu { display: grid; }
  .sidebar { position: fixed; z-index: 40; top: 60px; left: 0; width: 280px; background: var(--bg); transform: translateX(-102%); transition: transform .2s; box-shadow: 0 20px 60px -20px rgb(0 0 0 / .4); }
  .sidebar.open { transform: none; }
  .content { padding: 28px 18px 64px; }
  .search { margin-left: 0; flex: 1; } .search span, .search kbd { display: none; } .search { flex: 0 0 36px; justify-content: center; padding: 0; }
  .top-links a:not(.btn) { display: none; }
  .cards { grid-template-columns: 1fr; }
  .anchor { display: none; }
  h1 { font-size: 28px; }
}

.brand .brand-sub { letter-spacing: -0.01em; }