/* YN Docs - YN theme B: neutral grey, one calm blue (#5b8fd9), flat, no glow, one font (Inter) */
:root {
  --bg-0: #0e0e0e; --bg-1: #141414; --bg-2: #1a1a1a; --bg-3: #212121; --bg-4: #2a2a2a;
  --line: rgba(255, 255, 255, 0.07); --line-2: rgba(255, 255, 255, 0.11);
  --tx-1: #f2f2f2; --tx-2: #b3b3b3; --tx-3: #8a8a8a;
  --blue: #5b8fd9; --blue-hi: #8fb4ea; --blue-fill: rgba(91, 143, 217, 0.12); --blue-line: rgba(91, 143, 217, 0.55);
  --ok: #6fc28f; --warn: #e0b060; --bad: #e07a7a;
  --r: 10px; --dur: 160ms;
  --nav-h: 60px;
}
* { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--nav-h) + 16px); }
body { margin: 0; background: var(--bg-0); color: var(--tx-1); font: 15px/1.65 'Inter', system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: var(--blue-hi); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font: inherit; color: inherit; }
code, kbd, pre { font-family: ui-monospace, 'Cascadia Code', Consolas, monospace; }
svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex: none; }

/* top bar */
.dnav { position: sticky; top: 0; z-index: 30; height: var(--nav-h); background: rgba(14, 14, 14, 0.9); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.dnav-in { height: 100%; max-width: 1480px; margin: 0 auto; padding: 0 20px; display: flex; align-items: center; gap: 18px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--tx-1); font-weight: 800; letter-spacing: 0.02em; }
.logo:hover { text-decoration: none; }
.logo b { color: var(--blue-hi); }
.logo-sub { font-weight: 500; color: var(--tx-3); padding-left: 10px; border-left: 1px solid var(--line-2); letter-spacing: 0; }
.search-btn { margin-left: 24px; flex: 0 1 360px; height: 36px; display: flex; align-items: center; gap: 10px; padding: 0 10px 0 12px; border-radius: 8px; border: 1px solid var(--line-2); background: var(--bg-1); color: var(--tx-3); cursor: pointer; font-size: 14px; }
.search-btn span { flex: 1; text-align: left; }
.search-btn:hover { border-color: var(--tx-3); }
kbd { font-size: 11px; padding: 1px 6px; border-radius: 5px; border: 1px solid var(--line-2); background: var(--bg-2); color: var(--tx-2); }
.dnav-links { margin-left: auto; display: flex; gap: 18px; }
.dnav-links a { color: var(--tx-2); font-size: 14px; font-weight: 500; }
.dnav-links a:hover { color: var(--tx-1); text-decoration: none; }
.menu-btn { display: none; width: 36px; height: 36px; border-radius: 8px; border: 1px solid var(--line-2); background: none; cursor: pointer; place-items: center; }

/* layout */
.layout { max-width: 1480px; margin: 0 auto; display: grid; grid-template-columns: 270px minmax(0, 1fr) 230px; gap: 0; }
.side { position: sticky; top: var(--nav-h); height: calc(100vh - var(--nav-h)); overflow-y: auto; padding: 22px 14px 40px 20px; border-right: 1px solid var(--line); }
.side h4 { margin: 22px 0 6px 10px; font-size: 11px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--tx-3); }
.side h4:first-child { margin-top: 0; }
.side a { display: flex; align-items: center; gap: 9px; padding: 6px 10px; border-radius: 7px; color: var(--tx-2); font-size: 14px; border: 1px solid transparent; }
.side a:hover { color: var(--tx-1); background: var(--bg-2); text-decoration: none; }
.side a.on { color: var(--tx-1); background: var(--blue-fill); border-color: var(--blue-line); }
.side a .tag { margin-left: auto; }
.side a svg { width: 15px; height: 15px; color: var(--tx-3); }
.side a.on svg { color: var(--blue-hi); }

.content { min-width: 0; padding: 36px 48px 80px; outline: none; }
.toc { position: sticky; top: var(--nav-h); height: calc(100vh - var(--nav-h)); overflow-y: auto; padding: 36px 20px; }
.toc h5 { margin: 0 0 10px; font-size: 11px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--tx-3); }
.toc a { display: block; padding: 4px 0 4px 12px; border-left: 1px solid var(--line-2); color: var(--tx-3); font-size: 13px; line-height: 1.4; }
.toc a.l3 { padding-left: 24px; }
.toc a:hover { color: var(--tx-1); text-decoration: none; }
.toc a.on { color: var(--blue-hi); border-left-color: var(--blue); }
.loading { color: var(--tx-3); padding: 40px 0; }

/* article */
.doc { max-width: 860px; }
.crumbs { font-size: 13px; color: var(--tx-3); margin-bottom: 10px; }
.doc h1 { font-size: 36px; line-height: 1.15; letter-spacing: -0.025em; margin: 0 0 12px; font-weight: 800; }
.doc .lead { font-size: 17px; color: var(--tx-2); margin: 0 0 22px; }
.doc h2 { font-size: 23px; letter-spacing: -0.015em; margin: 48px 0 14px; padding-top: 22px; border-top: 1px solid var(--line); font-weight: 700; }
.doc h3 { font-size: 17px; margin: 30px 0 10px; font-weight: 650; }
.doc h2 a.anchor, .doc h3 a.anchor { opacity: 0; margin-left: 8px; color: var(--tx-3); font-weight: 400; }
.doc h2:hover a.anchor, .doc h3:hover a.anchor { opacity: 1; text-decoration: none; }
.doc p { margin: 0 0 14px; color: var(--tx-2); }
.doc strong { color: var(--tx-1); }
.doc ul, .doc ol { margin: 0 0 16px; padding-left: 22px; color: var(--tx-2); }
.doc li { margin: 4px 0; }
.doc li::marker { color: var(--tx-3); }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }
.doc :not(pre) > code { padding: 1px 6px; border-radius: 5px; background: var(--bg-3); border: 1px solid var(--line); color: var(--tx-1); font-size: 0.86em; }
.doc img { max-width: 100%; }

.pre { position: relative; margin: 0 0 18px; border: 1px solid var(--line); border-radius: var(--r); background: var(--bg-1); overflow: hidden; }
.pre-head { display: flex; align-items: center; justify-content: space-between; padding: 7px 10px 7px 14px; border-bottom: 1px solid var(--line); font-size: 12px; color: var(--tx-3); }
.copy { border: 1px solid var(--line-2); background: var(--bg-2); color: var(--tx-2); font-size: 12px; padding: 2px 9px; border-radius: 6px; cursor: pointer; }
.copy:hover { color: var(--tx-1); }
.pre pre { margin: 0; padding: 14px 16px; overflow-x: auto; font-size: 13px; line-height: 1.65; color: #d8d8d8; }
.pre .k { color: var(--blue-hi); } .pre .s { color: #a8d5a2; } .pre .c { color: var(--tx-3); } .pre .n { color: #e0b98a; }

.table-wrap { overflow-x: auto; margin: 0 0 18px; border: 1px solid var(--line); border-radius: var(--r); }
.doc table { width: 100%; border-collapse: collapse; font-size: 14px; }
.doc th { text-align: left; font-size: 12px; font-weight: 650; letter-spacing: 0.04em; text-transform: uppercase; color: var(--tx-3); background: var(--bg-1); }
.doc th, .doc td { padding: 9px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.doc tr:last-child td { border-bottom: 0; }
.doc td { color: var(--tx-2); }

.callout { display: flex; gap: 12px; margin: 0 0 18px; padding: 13px 16px; border-radius: var(--r); border: 1px solid var(--line-2); background: var(--bg-1); }
.callout svg { margin-top: 3px; }
.callout p:last-child { margin-bottom: 0; }
.callout.info { border-color: var(--blue-line); background: var(--blue-fill); } .callout.info svg { color: var(--blue-hi); }
.callout.warn { border-color: rgba(224, 176, 96, 0.45); background: rgba(224, 176, 96, 0.07); } .callout.warn svg { color: var(--warn); }
.callout.danger { border-color: rgba(224, 122, 122, 0.45); background: rgba(224, 122, 122, 0.07); } .callout.danger svg { color: var(--bad); }
.callout.ok { border-color: rgba(111, 194, 143, 0.4); background: rgba(111, 194, 143, 0.07); } .callout.ok svg { color: var(--ok); }

.shot { margin: 6px 0 22px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--bg-1); cursor: zoom-in; }
.shot img { display: block; width: 100%; }
.shot figcaption { padding: 9px 14px; font-size: 13px; color: var(--tx-3); border-top: 1px solid var(--line); }

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 22px; }
.tag { display: inline-flex; align-items: center; height: 22px; padding: 0 8px; border-radius: 5px; font-size: 11.5px; font-weight: 600; border: 1px solid var(--line-2); color: var(--tx-2); background: var(--bg-2); }
.tag.blue { color: var(--blue-hi); border-color: var(--blue-line); background: var(--blue-fill); }
.tag.ok { color: var(--ok); border-color: rgba(111, 194, 143, 0.4); }
.tag.warn { color: var(--warn); border-color: rgba(224, 176, 96, 0.4); }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; margin: 0 0 22px; }
.cards a { display: flex; flex-direction: column; gap: 4px; padding: 16px; border-radius: var(--r); border: 1px solid var(--line); background: var(--bg-1); color: var(--tx-1); transition: border-color var(--dur), background var(--dur); }
.cards a:hover { text-decoration: none; border-color: var(--blue-line); background: var(--blue-fill); }
.cards a b { font-size: 15px; }
.cards a span { font-size: 13px; color: var(--tx-3); }

.steps { counter-reset: step; list-style: none; padding-left: 0 !important; }
.steps > li { position: relative; padding-left: 40px; margin: 0 0 14px; }
.steps > li::before { counter-increment: step; content: counter(step); position: absolute; left: 0; top: 0; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font-size: 12px; font-weight: 700; color: var(--blue-hi); border: 1px solid var(--blue-line); background: var(--blue-fill); }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 56px; }
.pager a { display: flex; flex-direction: column; gap: 2px; padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--r); color: var(--tx-1); }
.pager a:hover { border-color: var(--blue-line); text-decoration: none; }
.pager a small { color: var(--tx-3); font-size: 12px; }
.pager a.next { text-align: right; grid-column: 2; }
.edited { margin-top: 24px; font-size: 12.5px; color: var(--tx-3); }

/* search */
.search-ov { position: fixed; inset: 0; z-index: 60; background: rgba(0, 0, 0, 0.6); display: flex; justify-content: center; align-items: flex-start; padding: 12vh 16px 16px; }
.search-ov[hidden] { display: none; }
.search-box { width: min(640px, 100%); background: var(--bg-1); border: 1px solid var(--line-2); border-radius: 12px; overflow: hidden; }
.search-in { display: flex; align-items: center; gap: 10px; padding: 0 14px; height: 52px; border-bottom: 1px solid var(--line); color: var(--tx-3); }
.search-in input { flex: 1; border: 0; outline: 0; background: none; color: var(--tx-1); font: inherit; font-size: 16px; }
.search-res { max-height: 55vh; overflow-y: auto; padding: 6px; }
.search-res a { display: block; padding: 9px 12px; border-radius: 8px; color: var(--tx-1); }
.search-res a:hover, .search-res a.sel { background: var(--blue-fill); text-decoration: none; }
.search-res a small { display: block; color: var(--tx-3); font-size: 12.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.search-res a mark { background: none; color: var(--blue-hi); font-weight: 600; }
.search-res .none { padding: 18px 12px; color: var(--tx-3); }

.lightbox { position: fixed; inset: 0; z-index: 70; background: rgba(0, 0, 0, 0.85); display: grid; place-items: center; padding: 24px; cursor: zoom-out; }
.lightbox[hidden] { display: none; }
.lightbox img { max-width: 100%; max-height: 100%; border-radius: 10px; border: 1px solid var(--line-2); }

@media (max-width: 1180px) {
  .layout { grid-template-columns: 250px minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 860px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .side { position: fixed; top: var(--nav-h); left: 0; bottom: 0; z-index: 25; width: 280px; background: var(--bg-0); transform: translateX(-100%); transition: transform 200ms; }
  body.menu-open .side { transform: none; }
  .menu-btn { display: grid; }
  .content { padding: 24px 16px 60px; }
  .doc h1 { font-size: 28px; }
  .search-btn { margin-left: 0; }
  .search-btn span, .search-btn kbd, .logo-sub { display: none; }
  .dnav-links a:first-child { display: none; }
  .pager { grid-template-columns: 1fr; }
  .pager a.next { grid-column: 1; }
}