/* =====================================================================
   DC4AI Documentation — layout
   Tokens come from ../assets/tokens.css, shared with the console.
   ===================================================================== */
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  font-family:var(--font-body);background:var(--bg);color:var(--text);
  font-size:15.5px;line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:2px}
button{background:none;border:none;cursor:pointer;font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.logo{height:24px;width:auto;display:block}
.logo .lg-ink{fill:var(--text)}

.wrap{display:grid;grid-template-columns:264px minmax(0,1fr);min-height:100vh;max-width:1400px;margin:0 auto}

/* sidebar */
.side{position:sticky;top:0;height:100vh;overflow-y:auto;border-right:1px solid var(--line);
  background:var(--bg-nav);padding:0 0 28px;z-index:20}
.side-head{display:flex;align-items:center;gap:10px;padding:16px 20px;border-bottom:1px solid var(--line);
  position:sticky;top:0;background:var(--bg-nav);z-index:2}
.badge{font-family:var(--font-mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--brand);border:1px solid var(--brand-line);border-radius:5px;padding:2px 6px}
.side nav{padding:14px 12px}
.sec-t{font-family:var(--font-mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted-2);padding:14px 10px 7px}
.side nav a{display:block;padding:7px 10px;border-radius:8px;font-size:14px;color:var(--text-2);text-decoration:none}
.side nav a:hover{background:var(--hover);color:var(--text);text-decoration:none}
.side nav a.on{background:var(--brand-soft);color:var(--brand);font-weight:600}

/* main */
.main{min-width:0;display:flex;flex-direction:column}
.top{position:sticky;top:0;z-index:15;display:flex;align-items:center;gap:12px;
  padding:11px 34px;background:var(--nav-bg);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.burger{display:none;width:34px;height:34px;place-items:center;border-radius:8px;color:var(--text-2)}
.burger:hover{background:var(--hover)}
.crumb{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--muted)}
.spacer{flex:1}
.seg{display:inline-flex;border:1px solid var(--line-2);border-radius:999px;overflow:hidden}
.seg button{padding:5px 11px;font-size:12px;font-weight:600;color:var(--muted);letter-spacing:.03em}
.seg button:hover{color:var(--text)}
.seg button.on{background:var(--brand-fill);color:var(--brand-on)}
.icon-btn{width:32px;height:32px;flex:none;display:grid;place-items:center;border-radius:999px;
  border:1px solid var(--line-2);color:var(--text-2)}
.icon-btn:hover{color:var(--text);border-color:var(--line-strong);background:var(--hover)}
.tolink{font-size:13.5px;color:var(--text-2);white-space:nowrap}
.tolink:hover{color:var(--brand)}

/* Article and its table of contents. The prose stays at a readable
   measure; the rail takes the gutter that measure leaves behind. */
.doc-row{display:grid;grid-template-columns:minmax(0,1fr) 236px;align-items:start}
.doc{padding:34px 34px 90px;max-width:78ch;width:100%}
/* Clears the sticky header when a heading is jumped to. */
.doc h2{scroll-margin-top:84px}

/* Copy-link affordance. Hidden until the heading is hovered or the anchor
   is focused, so it never competes with the heading itself — but always
   visible where there is no hover to reveal it. */
.hanchor{display:inline-flex;align-items:center;vertical-align:baseline;margin-left:9px;
  color:var(--muted-2);opacity:0;transition:opacity .14s ease,color .14s ease}
.doc h2:hover .hanchor{opacity:1}
.hanchor:hover{color:var(--brand);text-decoration:none}
.hanchor:focus-visible{opacity:1}
.hanchor.ok{opacity:1;color:var(--brand)}
@media(hover:none){.hanchor{opacity:.5}}

.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;
  clip:rect(0 0 0 0);white-space:nowrap;border:0}

.toc{position:sticky;top:57px;max-height:calc(100vh - 57px);overflow-y:auto;padding:38px 26px 40px 0}
.toc-in{border-left:1px solid var(--line);padding-left:16px}
.toc-t{font-family:var(--font-mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted-2);margin-bottom:10px}
.toc nav{display:flex;flex-direction:column;gap:2px}
.toc a{display:block;padding:4px 0;font-size:13px;line-height:1.45;color:var(--muted);
  text-decoration:none;border-left:2px solid transparent;margin-left:-18px;padding-left:16px}
.toc a:hover{color:var(--text);text-decoration:none}
.toc a.on{color:var(--brand);border-left-color:var(--brand-fill);font-weight:600}
.doc h1{font-family:var(--font-display);font-size:32px;font-weight:750;letter-spacing:-.02em;line-height:1.15}
.doc .lead{font-size:17px;color:var(--muted);margin:9px 0 30px}
.doc h2{font-family:var(--font-display);font-size:20px;font-weight:700;letter-spacing:-.015em;margin:34px 0 12px}
.doc h2 .dt{font-family:var(--font-mono);font-size:11.5px;font-weight:400;color:var(--muted-2);letter-spacing:.04em;margin-left:9px}
.doc p{margin-bottom:14px;color:var(--text-2)}
.doc ul{margin:0 0 16px;padding-left:20px}
.doc li{margin-bottom:7px;color:var(--text-2)}
.doc b{color:var(--text);font-weight:640}
.doc code{font-family:var(--font-mono);font-size:.87em;background:var(--surface-2);
  border:1px solid var(--line);border-radius:5px;padding:1.5px 5px;color:var(--text)}
.doc pre{background:var(--code-bg);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:15px 17px;overflow-x:auto;margin-bottom:16px}
.doc pre code{background:none;border:none;padding:0;color:var(--code-fg);font-size:12.5px;line-height:1.7}
.doc table{width:100%;border-collapse:collapse;font-size:14px;margin-bottom:18px;
  border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}
.doc th{text-align:left;font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--muted-2);font-weight:500;padding:11px 14px;
  background:var(--surface-2);border-bottom:1px solid var(--line)}
.doc td{padding:11px 14px;border-bottom:1px solid var(--line);color:var(--text-2)}
.doc tbody tr:last-child td{border-bottom:none}
.doc td:first-child{color:var(--text);font-weight:560}
.tblwrap{overflow-x:auto}
.cal{display:block;padding:16px 18px;border-radius:var(--radius-sm);margin:20px 0;
  background:var(--brand-soft);border:1px solid var(--brand-line)}
.cal b{display:block;margin-bottom:6px;color:var(--brand)}
.cal p{margin:0;font-size:14px}

.pager{display:flex;gap:12px;margin-top:44px;padding-top:24px;border-top:1px solid var(--line)}
.pg{flex:1;min-width:0;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:var(--surface);text-decoration:none;box-shadow:var(--shadow-card)}
.pg:hover{border-color:var(--brand-line);text-decoration:none}
.pg span{display:block;font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--muted-2);margin-bottom:4px}
.pg b{display:block;font-size:14.5px;color:var(--text);font-weight:640;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pg.next{text-align:right}

.scrim{position:fixed;inset:0;background:var(--scrim);z-index:19;display:none}
.scrim.open{display:block}

/* Below this the measure has eaten the gutter, so there is nowhere for
   the rail to sit; the left nav still carries navigation. */
@media(max-width:1180px){
  .doc-row{grid-template-columns:minmax(0,1fr)}
  .toc{display:none}
}
@media(max-width:900px){
  .wrap{grid-template-columns:1fr}
  .side{position:fixed;left:0;top:0;width:264px;transform:translateX(-100%);
    transition:transform .22s cubic-bezier(.2,.8,.3,1);box-shadow:var(--shadow-side)}
  .side.open{transform:none}
  .burger{display:grid}
  .top{padding:11px 18px}
  .doc{padding:26px 18px 70px}
  .doc h1{font-size:26px}
  .pager{flex-direction:column}
  .pg.next{text-align:left}
}
@media (prefers-reduced-motion:reduce){*{transition-duration:.01ms!important}}