html { scroll-padding-top: 100px; scrollbar-width: thin; scrollbar-color: color-mix(in srgb, var(--fk-ink) 30%, transparent) transparent; }
::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-track { background: var(--fk-bg); }
::-webkit-scrollbar-thumb { background: color-mix(in srgb, var(--fk-ink) 26%, transparent); border-radius: 999px; border: 3px solid var(--fk-bg); background-clip: padding-box; }
.skip { position: absolute; left: 50%; top: -80px; z-index: 1200; transform: translateX(-50%); padding: 10px 20px; border-radius: 999px; background: var(--fk-ink); color: var(--fk-bg); text-decoration: none; transition: top .2s ease; }
.skip:focus { top: 12px; }
a { color: var(--fk-ink); }

.docs-search-btn { display: inline-flex; align-items: center; gap: 10px; height: 44px; padding: 0 8px 0 14px; border: 0; border-radius: 999px; font: 500 14px/1 var(--fk-sans); color: var(--fk-soft); background: color-mix(in srgb, var(--fk-ink) 5%, transparent); box-shadow: inset 0 0 0 1px var(--fk-line); cursor: pointer; transition: background .3s ease, color .3s ease; }
.docs-search-btn:hover { color: var(--fk-ink); background: color-mix(in srgb, var(--fk-ink) 9%, transparent); }
.docs-search-btn svg { width: 16px; height: 16px; }
.docs-search-btn .fk-kbd { font-size: 11px; }
.docs-shell { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 900px) minmax(0, 1fr); column-gap: 48px; width: min(1480px, calc(100% - 48px)); margin: 0 auto; padding-top: 36px; }
.docs-main { grid-column: 2; }
.docs-toc { grid-column: 3; justify-self: start; width: 100%; max-width: 230px; }
.docs-main { min-width: 0; padding-bottom: 40px; }
.doc-head { padding: 12px 0 40px; border-bottom: 1px solid var(--fk-line); margin-bottom: 8px; }
.doc-head .fk-crumbs { margin-bottom: 26px; }
.doc-head .fk-eyebrow { margin-bottom: 18px; }
.doc-head h1 { font-family: var(--fk-serif); font-weight: 400; font-size: clamp(48px, 6.6vw, 96px); line-height: .95; letter-spacing: -.025em; color: var(--fk-ink); margin: 0; }
.doc-head h1 em { font-style: italic; color: var(--fk-ink-2); }
.doc-head .fk-lede { margin: 22px 0 0; }
.doc-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }

.doc section { padding-top: 56px; }
.doc h2 { position: relative; display: flex; align-items: baseline; gap: 14px; margin: 0 0 18px; padding-top: 12px; font-family: var(--fk-serif); font-weight: 400; font-size: clamp(34px, 4vw, 52px); line-height: 1.05; letter-spacing: -.015em; color: var(--fk-ink); }
.doc h2 .n { font-family: var(--fk-mono); font-size: 13px; letter-spacing: .06em; color: var(--fk-ink-2); }
.doc h2 .anchor { opacity: 0; font-family: var(--fk-mono); font-size: 18px; color: var(--fk-ink-2); text-decoration: none; transition: opacity .2s ease; }
.doc h2:hover .anchor, .doc h2 .anchor:focus { opacity: 1; }
.doc h3 { margin: 34px 0 12px; font-size: 19px; font-weight: 600; letter-spacing: -.01em; color: var(--fk-ink); }
.doc h4 { margin: 24px 0 8px; font-size: 16px; font-weight: 600; color: var(--fk-ink); }
.doc p, .doc li { font-size: 16.5px; line-height: 1.75; color: var(--fk-text); }
.doc p { margin: 0 0 16px; max-width: 760px; }
.doc ul, .doc ol { margin: 0 0 18px; padding-left: 22px; max-width: 760px; }
.doc li + li { margin-top: 6px; }
.doc li::marker { color: var(--fk-ink-2); }
.doc strong { color: var(--fk-ink); font-weight: 600; }
.doc code:not(pre code) { font-family: var(--fk-mono); font-size: .84em; padding: .14em .45em; border-radius: 6px; color: var(--fk-ink); background: color-mix(in srgb, var(--fk-ink) 7%, transparent); word-break: break-word; }
.doc .fk-table-wrap { margin: 8px 0 22px; }
.doc .fk-table td code { white-space: nowrap; }
.doc .fk-table td { font-size: 14.5px; }

.callout { display: flex; gap: 14px; margin: 18px 0 22px; padding: 18px 20px; border-radius: 20px; background: color-mix(in srgb, var(--fk-ink) 4%, transparent); box-shadow: inset 0 0 0 1px var(--fk-line); max-width: 820px; }
.callout svg { width: 20px; height: 20px; flex-shrink: 0; margin-top: 3px; color: var(--fk-ink); }
.callout p { margin: 0; font-size: 15.5px; }
.callout p + p { margin-top: 6px; }
.callout strong { display: block; margin-bottom: 2px; }
.callout-warn { background: color-mix(in srgb, var(--fk-warning) 8%, transparent); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--fk-warning) 28%, transparent); }
.callout-warn svg { color: var(--fk-warning); }
.callout-danger { background: color-mix(in srgb, var(--fk-danger) 8%, transparent); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--fk-danger) 28%, transparent); }
.callout-danger svg { color: var(--fk-danger); }

.ex { margin: 18px 0 28px; border-radius: 26px; overflow: hidden; box-shadow: inset 0 0 0 1px var(--fk-line), var(--fk-gshadow); background: color-mix(in srgb, var(--fk-surface) 55%, transparent); }
.ex-demo { position: relative; padding: 36px 32px; background-image: radial-gradient(var(--fk-line) 1px, transparent 1px); background-size: 18px 18px; }
.ex-demo.is-center { display: grid; grid-template-columns: minmax(0, 1fr); place-items: center; text-align: center; }
.ex-demo.is-center > * { max-width: 100%; }
.ex-demo.is-flush { padding: 0; background-image: none; }
.ex-code { border-top: 1px solid var(--fk-line); background: #0b0b0b; }
.code-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 14px 10px 20px; border-bottom: 1px solid rgba(255, 255, 255, .07); }
.code-bar .lang { font-family: var(--fk-mono); font-size: 11.5px; letter-spacing: .08em; text-transform: uppercase; color: rgba(245, 245, 243, .5); }
.code-bar .title { min-width: 0; margin-right: auto; margin-left: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-family: var(--fk-mono); font-size: 12px; color: rgba(245, 245, 243, .75); }
.code-bar .copy-btn, .code-bar .lang { flex-shrink: 0; }
.copy-btn { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border: 0; border-radius: 999px; font: 500 12px/1 var(--fk-sans); color: rgba(245, 245, 243, .75); background: rgba(255, 255, 255, .06); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .1); cursor: pointer; transition: background .25s ease, color .25s ease; }
.copy-btn:hover { background: #f5f5f3; color: #0b0b0b; }
.copy-btn svg { width: 13px; height: 13px; }
.copy-btn.is-done { background: #f5f5f3; color: #0b0b0b; }
.ex-code pre, .codeblock pre { margin: 0; padding: 18px 20px 20px; overflow-x: auto; max-height: 520px; font: 400 13.5px/1.7 var(--fk-mono); color: #d8d8d6; tab-size: 2; scrollbar-width: thin; scrollbar-color: rgba(255, 255, 255, .2) transparent; }
.ex-code pre code, .codeblock pre code { font: inherit; white-space: pre; }
.codeblock { margin: 16px 0 24px; border-radius: 22px; overflow: hidden; background: #0b0b0b; box-shadow: inset 0 1px 0 rgba(255, 255, 255, .08), inset 0 0 0 1px rgba(255, 255, 255, .06), var(--fk-gshadow); }
.tok-c { color: #6f6f6c; font-style: italic; }
.tok-s { color: #a9c7a1; }
.tok-k { color: #f5f5f3; font-weight: 600; }
.tok-t { color: #e0b98a; }
.tok-a { color: #a8b8d8; }
.tok-n { color: #d7a8c4; }
.tok-v { color: #c9b6e8; }

.swatches { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; margin: 12px 0 26px; }
.swatch { border-radius: 20px; overflow: hidden; box-shadow: inset 0 0 0 1px var(--fk-line); background: var(--fk-surface); }
.swatch i { display: block; height: 84px; box-shadow: inset 0 -1px 0 var(--fk-line); }
.swatch div { padding: 10px 12px 12px; }
.swatch b { display: block; font-size: 13.5px; font-weight: 600; color: var(--fk-ink); }
.swatch code { font-family: var(--fk-mono); font-size: 11.5px; color: var(--fk-soft); background: none !important; padding: 0 !important; }
.type-row { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 20px; align-items: baseline; padding: 18px 0; border-bottom: 1px solid var(--fk-line); }
.type-row:first-child { border-top: 1px solid var(--fk-line-2); }
.type-row .fk-mono { font-size: 11.5px; }
.scale-row { display: flex; align-items: center; gap: 16px; padding: 8px 0; }
.scale-row i { display: block; height: 14px; border-radius: 4px; background: var(--fk-ink); }
.scale-row code { min-width: 110px; }
.icon-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(112px, 1fr)); gap: 10px; margin: 12px 0 24px; }
.icon-cell { display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 18px 8px 12px; border: 0; border-radius: 18px; background: color-mix(in srgb, var(--fk-surface) 60%, transparent); box-shadow: inset 0 0 0 1px var(--fk-line); color: var(--fk-ink); cursor: pointer; transition: background .25s ease, color .25s ease, transform .5s var(--fk-spring); }
.icon-cell:hover { background: var(--fk-ink); color: var(--fk-bg); transform: translateY(-3px); }
.icon-cell svg { width: 22px; height: 22px; }
.icon-cell span { font-family: var(--fk-mono); font-size: 11px; color: inherit; opacity: .7; }
.radius-row { display: flex; flex-wrap: wrap; gap: 14px; }
.radius-row div { display: grid; place-items: center; width: 110px; height: 90px; background: color-mix(in srgb, var(--fk-ink) 8%, transparent); box-shadow: inset 0 0 0 1px var(--fk-line-2); font-family: var(--fk-mono); font-size: 11.5px; color: var(--fk-ink); }
.demo-stack { display: flex; flex-direction: column; gap: 14px; width: 100%; }
.demo-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.demo-bg { padding: 32px; border-radius: 24px; background: radial-gradient(circle at 20% 20%, color-mix(in srgb, var(--fk-ink) 22%, transparent), transparent 45%), radial-gradient(circle at 80% 70%, color-mix(in srgb, var(--fk-ink) 16%, transparent), transparent 45%), var(--fk-bg-2); }
.er { width: 100%; height: auto; }
.er text { font-family: var(--fk-mono); fill: var(--fk-ink); }
.er .t-head { font-size: 13px; font-weight: 600; }
.er .t-col { font-size: 11.5px; fill: var(--fk-soft); }
.er .t-pk { fill: var(--fk-ink); }
.er rect.box { fill: var(--fk-surface); stroke: var(--fk-line-2); }
.er rect.hd { fill: var(--fk-ink); }
.er .hd-t { fill: var(--fk-bg); font-size: 12.5px; font-weight: 600; }
.er path { fill: none; stroke: var(--fk-ink-2); stroke-width: 1.2; stroke-dasharray: 4 4; }
.arch { display: grid; grid-template-columns: repeat(5, auto); align-items: center; justify-content: center; gap: 14px; text-align: center; }
.arch .node { padding: 16px 18px; border-radius: 20px; background: var(--fk-surface); box-shadow: inset 0 0 0 1px var(--fk-line-2); min-width: 150px; }
.arch .node b { display: block; font-family: var(--fk-serif); font-weight: 400; font-size: 22px; color: var(--fk-ink); }
.arch .node small { font-family: var(--fk-mono); font-size: 11px; color: var(--fk-soft); }
.arch .node.is-dark { background: var(--fk-ink); }
.arch .node.is-dark b, .arch .node.is-dark small { color: var(--fk-bg); }
.arch .arr { font-family: var(--fk-mono); font-size: 12px; color: var(--fk-soft); }
.arch .arr svg { width: 26px; height: 26px; margin: 0 auto 4px; color: var(--fk-ink); }

.home-hero { padding: 40px 0 56px; text-align: center; }
.home-hero .fk-display { font-size: clamp(64px, 11vw, 168px); }
.home-hero .fk-lede { margin: 26px auto 0; }
.home-hero .fk-cluster { justify-content: center; margin-top: 34px; }
.install { max-width: 720px; margin: 40px auto 0; text-align: left; }
.alpha { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; margin: 34px auto 0; max-width: 760px; }
.alpha a { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 14px; font-family: var(--fk-serif); font-size: 22px; color: var(--fk-ink); text-decoration: none; box-shadow: inset 0 0 0 1px var(--fk-line); transition: background .25s ease, color .25s ease, transform .5s var(--fk-spring); }
.alpha a:hover { background: var(--fk-ink); color: var(--fk-bg); transform: translateY(-3px); }
.alpha span { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 14px; font-family: var(--fk-serif); font-size: 22px; color: var(--fk-ink-2); opacity: .35; }
.glossary dt { margin-top: 18px; font-weight: 600; color: var(--fk-ink); }
.glossary dd { margin: 4px 0 0; color: var(--fk-text); max-width: 760px; }
.letter { display: flex; align-items: center; gap: 14px; margin: 40px 0 6px; font-family: var(--fk-serif); font-size: 56px; line-height: 1; color: var(--fk-ink); }
.letter::after { content: ""; flex: 1; height: 1px; background: var(--fk-line-2); }
.class-index { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 6px; margin: 12px 0 24px; padding: 0; list-style: none; }
.class-index li { margin: 0 !important; }
.class-index code { display: block; padding: 8px 10px !important; border-radius: 10px !important; font-size: 12.5px !important; }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 72px; padding-top: 32px; border-top: 1px solid var(--fk-line); }
.pager a { display: block; padding: 22px 24px; border-radius: 22px; text-decoration: none; box-shadow: inset 0 0 0 1px var(--fk-line); transition: box-shadow .3s ease, transform .6s var(--fk-ease); }
.pager a:hover { box-shadow: inset 0 0 0 1px var(--fk-ink); transform: translateY(-3px); }
.pager span { font-family: var(--fk-mono); font-size: 11.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--fk-soft); }
.pager b { display: block; margin-top: 6px; font-family: var(--fk-serif); font-weight: 400; font-size: 28px; color: var(--fk-ink); }
.pager .next { text-align: right; grid-column: 2; }

.docs-toc { position: sticky; top: 100px; align-self: start; max-height: calc(100vh - 120px); overflow-y: auto; padding-top: 18px; scrollbar-width: none; }
.docs-toc::-webkit-scrollbar { display: none; }
.docs-toc p { margin: 0 0 12px; font-family: var(--fk-mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--fk-ink-2); }
.docs-toc ul { margin: 0; padding: 0; list-style: none; border-left: 1px solid var(--fk-line-2); }
.docs-toc a { display: block; margin-left: -1px; padding: 5px 0 5px 14px; border-left: 1px solid transparent; font-size: 13.5px; line-height: 1.4; color: var(--fk-soft); text-decoration: none; transition: color .25s ease, border-color .25s ease; }
.docs-toc a:hover { color: var(--fk-ink); }
.docs-toc a.is-active { color: var(--fk-ink); border-left-color: var(--fk-ink); }

.search-dlg { width: min(640px, calc(100% - 24px)); margin-top: 10vh; padding: 0; border: 0; border-radius: 28px; color: var(--fk-text); background: var(--fk-glass-strong); -webkit-backdrop-filter: var(--fk-blur); backdrop-filter: var(--fk-blur); box-shadow: inset 0 1px 0 var(--fk-hi), inset 0 0 0 1px var(--fk-line), 0 60px 120px -40px rgba(0, 0, 0, .55); }
.search-dlg[open] { animation: fk-pop .5s var(--fk-spring); }
.search-dlg::backdrop { background: rgba(0, 0, 0, .35); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
.search-top { display: flex; align-items: center; gap: 12px; padding: 16px 18px; border-bottom: 1px solid var(--fk-line); }
.search-top svg { width: 20px; height: 20px; color: var(--fk-soft); flex-shrink: 0; }
.search-top input { flex: 1; min-width: 0; border: 0; outline: none; background: none; font: 400 18px/1.3 var(--fk-sans); color: var(--fk-ink); }
.search-top input::placeholder { color: var(--fk-ink-2); }
.search-res { max-height: min(60vh, 520px); overflow-y: auto; margin: 0; padding: 8px; list-style: none; }
.search-res a { display: flex; flex-direction: column; gap: 2px; padding: 12px 14px; border-radius: 14px; text-decoration: none; }
.search-res a b { font-weight: 600; font-size: 15px; color: var(--fk-ink); }
.search-res a span { font-size: 13px; color: var(--fk-soft); }
.search-res a.is-sel, .search-res a:hover { background: color-mix(in srgb, var(--fk-ink) 8%, transparent); }
.search-res .empty { padding: 28px 14px; text-align: center; color: var(--fk-soft); }
.search-foot { display: flex; gap: 16px; padding: 10px 18px; border-top: 1px solid var(--fk-line); font-size: 12px; color: var(--fk-soft); }

@media (max-width: 1280px) {
  .docs-shell { grid-template-columns: minmax(0, 900px); justify-content: center; }
  .docs-main { grid-column: 1; }
  .docs-toc { display: none; }
}
@media (max-width: 980px) {
  .docs-search-btn .t, .docs-search-btn .fk-kbd { display: none; }
  .docs-search-btn { width: 44px; padding: 0; justify-content: center; }
}
@media (max-width: 640px) {
  .docs-shell { width: calc(100% - 32px); padding-top: 24px; }
  .ex-demo { padding: 24px 18px; }
  .type-row { grid-template-columns: 1fr; gap: 6px; }
  .pager { grid-template-columns: 1fr; }
  .pager .next { grid-column: 1; }
  .arch { grid-template-columns: 1fr; }
  .arch .arr svg { transform: rotate(90deg); }
}
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
@media (min-width: 981px) and (max-width: 1100px) { .fk-navbar .fk-tabsbar a { padding: 8px 11px; font-size: 13.5px; } }
@media (min-width: 641px) and (max-width: 980px) { .fk-navbar .fk-tabsbar { display: none; } .fk-navbar-in { grid-template-columns: 1fr auto; } }

.cdn-hero { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin: 28px 0 8px; }
.cdn-hero .fk-kpi strong { font-size: clamp(34px, 3.4vw, 46px); }
.latency { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 28px; align-items: center; padding: 28px; border-radius: 26px; background: var(--fk-inv-bg); color: var(--fk-inv-text); box-shadow: var(--fk-shadow); }
.latency-num { font-family: var(--fk-serif); font-size: clamp(64px, 9vw, 120px); line-height: .9; font-variant-numeric: tabular-nums; }
.latency-num small { font-family: var(--fk-mono); font-size: 16px; opacity: .6; margin-left: 6px; }
.latency-meta { display: grid; gap: 10px; }
.latency-meta p { margin: 0; color: var(--fk-inv-soft) !important; font-size: 15px !important; }
.latency-bars { display: flex; align-items: flex-end; gap: 6px; height: 64px; }
.latency-bars i { flex: 1; min-height: 3px; border-radius: 4px 4px 2px 2px; background: var(--fk-inv-text); opacity: .85; transition: height .6s var(--fk-ease); }
.latency .fk-btn { justify-self: start; }
.latency .fk-btn-ghost { color: var(--fk-inv-text); background: transparent; box-shadow: inset 0 0 0 1px var(--fk-inv-line); }
.latency .fk-btn-ghost::before { background: var(--fk-inv-text); }
.latency .fk-btn-ghost:hover { color: var(--fk-inv-bg); }
.url-list { display: grid; gap: 10px; margin: 14px 0 24px; }
.url-list .row { display: grid; grid-template-columns: 170px minmax(0, 1fr); gap: 14px; align-items: center; }
.url-list .row > * { min-width: 0; }
.url-list .row > span { font-family: var(--fk-mono); font-size: 12px; letter-spacing: .05em; text-transform: uppercase; color: var(--fk-soft); }
.changelog { position: relative; }
.changelog .rel { padding: 28px 0; border-top: 1px solid var(--fk-line); }
.changelog .rel h3 { display: flex; align-items: baseline; gap: 14px; margin: 0 0 14px; font-family: var(--fk-serif); font-weight: 400; font-size: 40px; color: var(--fk-ink); }
.changelog .rel h3 time { font-family: var(--fk-mono); font-size: 12px; color: var(--fk-soft); }
.changelog .rel h4 { margin: 18px 0 6px; font-family: var(--fk-mono); font-size: 12px; font-weight: 500; letter-spacing: .06em; text-transform: uppercase; color: var(--fk-soft); }
@media (max-width: 640px) {
  .cdn-hero { grid-template-columns: 1fr; }
  .latency { grid-template-columns: 1fr; gap: 18px; padding: 22px; }
  .url-list .row { grid-template-columns: minmax(0, 1fr); gap: 4px; }
}.latency-bars:empty { display: none; }