/* ============================================================
   American Cocker Network — knowledge base
   Design language: minimalist documentation / wiki
   Palette   : white + a single cool blue + neutral grays
   Type      : system sans-serif, generous whitespace
   No framework, no external assets.
   ============================================================ */

:root{
  --blue:#1f4bd8;
  --blue-strong:#173aa8;
  --blue-deep:#122a72;
  --blue-tint:#eef1fd;
  --blue-tint-2:#e3e9fb;
  --blue-ring:rgba(31,75,216,.28);

  --ink:#191d27;
  --ink-2:#333a48;
  --muted:#5a6373;
  --faint:#8b94a4;

  --line:#e7eaf1;
  --line-2:#eff1f7;
  --surface:#f7f8fb;
  --surface-2:#f1f3f9;
  --white:#ffffff;

  --maxw:1160px;
  --header-h:62px;
  --radius:14px;
  --radius-sm:9px;

  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --shadow-sm:0 1px 2px rgba(20,30,60,.05);
  --shadow:0 1px 2px rgba(20,30,60,.04),0 10px 34px rgba(20,30,60,.06);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.72;
  color:var(--ink);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
}
::selection{background:var(--blue-tint-2);color:var(--blue-deep)}
img{max-width:100%;height:auto}

a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:2px}

:focus-visible{outline:2px solid var(--blue);outline-offset:2px;border-radius:4px}

.skip{
  position:absolute;left:-9999px;top:0;background:var(--blue);color:#fff;
  padding:10px 16px;border-radius:0 0 8px 0;z-index:100;font-weight:600
}
.skip:focus{left:0}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:40;
  background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(10px);
  -webkit-backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  max-width:var(--maxw);margin:0 auto;min-height:var(--header-h);
  padding:0 24px;display:flex;align-items:center;gap:22px;
}
.brand{display:inline-flex;align-items:center;gap:11px;color:var(--ink);flex:0 0 auto}
.brand:hover{text-decoration:none}
.brand-mark{display:inline-flex;line-height:0}
.brand-mark svg{display:block;border-radius:8px}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-text strong{font-size:1.02rem;letter-spacing:.06em;font-weight:800;color:var(--ink)}
.brand-sub{font-size:.685rem;letter-spacing:.055em;text-transform:uppercase;color:var(--faint);font-weight:600}

.site-nav{margin-left:auto;display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.site-nav a{
  color:var(--muted);font-size:.905rem;font-weight:500;
  padding:8px 12px;border-radius:8px;white-space:nowrap;position:relative;
}
.site-nav a:hover{color:var(--ink);background:var(--surface);text-decoration:none}
.site-nav a.is-active{color:var(--blue-strong);font-weight:650}
.site-nav a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-1px;height:2px;
  background:var(--blue);border-radius:2px
}

.nav-toggle{display:none}
.nav-burger{display:none;margin-left:auto;width:42px;height:38px;border-radius:9px;
  border:1px solid var(--line);cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:4px;background:var(--white)}
.nav-burger span{display:block;width:18px;height:2px;background:var(--ink-2);border-radius:2px;transition:.2s}

/* ---------- Layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.crumbs{
  font-size:.82rem;color:var(--faint);padding:20px 2px 0;
  display:flex;flex-wrap:wrap;gap:7px;align-items:center
}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--blue)}
.crumbs span[aria-current]{color:var(--ink-2)}
.crumbs .sep{color:#c7cdd9}

.layout{
  display:grid;grid-template-columns:minmax(0,1fr) 246px;gap:60px;
  padding:26px 0 72px;align-items:start;
}

/* ---------- Article ---------- */
.article{min-width:0;max-width:820px}
.eyebrow{
  font-size:.76rem;font-weight:700;letter-spacing:.11em;text-transform:uppercase;
  color:var(--blue);margin:0 0 14px
}
.article h1{
  font-size:clamp(2rem,4.4vw,2.7rem);line-height:1.1;letter-spacing:-.02em;
  font-weight:800;margin:0 0 18px;color:var(--ink)
}
.lede{
  font-size:1.235rem;line-height:1.6;color:var(--ink-2);margin:0 0 22px;font-weight:400
}
.doc-meta{
  display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;
  font-size:.83rem;color:var(--faint);margin:0 0 6px;
  padding:14px 0 0;border-top:1px solid var(--line-2)
}
.doc-meta .tag{
  display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-weight:500
}
.doc-meta .tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--blue)}

.article h2{
  font-size:1.58rem;line-height:1.25;letter-spacing:-.012em;font-weight:750;
  color:var(--ink);margin:52px 0 16px;padding-top:6px;scroll-margin-top:84px;
  position:relative
}
.article h2::before{
  content:"";position:absolute;left:-20px;top:16px;width:9px;height:9px;border-radius:2px;
  background:var(--blue);opacity:.9
}
.article h3{
  font-size:1.185rem;font-weight:700;color:var(--ink);margin:34px 0 10px;
  scroll-margin-top:84px;letter-spacing:-.01em
}
.article h4{font-size:1.02rem;font-weight:700;color:var(--ink-2);margin:24px 0 8px}

.article p{margin:0 0 18px}
.article ul,.article ol{margin:0 0 20px;padding-left:1.35em}
.article li{margin:0 0 9px}
.article li::marker{color:var(--blue)}
.article ul.plain{list-style:none;padding-left:0}
.article ul.plain li{padding-left:1.6em;position:relative}
.article ul.plain li::before{
  content:"";position:absolute;left:0;top:.66em;width:7px;height:7px;border-radius:2px;
  background:var(--blue-tint-2);border:1.5px solid var(--blue)
}
.article strong{font-weight:700;color:var(--ink)}
.article a{font-weight:500;border-bottom:1px solid var(--blue-tint-2)}
.article a:hover{border-bottom-color:var(--blue);text-decoration:none}

.hr{border:0;border-top:1px solid var(--line);margin:44px 0}

/* anchor permalink */
.anchor{margin-left:8px;color:var(--faint);opacity:0;font-weight:400;
  text-decoration:none;border:0;font-size:.8em}
.article h2:hover .anchor,.article h3:hover .anchor{opacity:1}
.anchor:hover{color:var(--blue)}

/* ---------- Callouts ---------- */
.callout{
  background:var(--surface);border:1px solid var(--line);
  border-left:3px solid var(--blue);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:16px 20px;margin:24px 0;font-size:.965rem;color:var(--ink-2)
}
.callout p:last-child{margin-bottom:0}
.callout .clabel{
  display:block;font-size:.72rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  color:var(--blue-strong);margin-bottom:6px
}
.callout.key{background:var(--blue-tint);border-color:var(--blue-tint-2)}

/* ---------- Tables ---------- */
.table-wrap{overflow-x:auto;margin:24px 0;border:1px solid var(--line);border-radius:var(--radius-sm)}
table{border-collapse:collapse;width:100%;font-size:.945rem}
thead th{
  background:var(--surface-2);text-align:left;font-weight:700;color:var(--ink-2);
  font-size:.83rem;letter-spacing:.02em;text-transform:uppercase;
  padding:12px 16px;border-bottom:1px solid var(--line)
}
tbody td,tbody th{padding:12px 16px;border-bottom:1px solid var(--line-2);vertical-align:top;text-align:left}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}
tbody tr:hover{background:var(--surface)}
tbody th[scope=row]{font-weight:650;color:var(--ink)}
table caption{caption-side:bottom;text-align:left;font-size:.82rem;color:var(--faint);padding:10px 4px 0}

/* quick-facts key/value */
.facts td:first-child,.facts th:first-child{width:38%;color:var(--muted);font-weight:600}
.facts td:last-child{color:var(--ink);font-weight:500}

/* ---------- Color swatches ---------- */
.swatches{list-style:none;padding:0;margin:22px 0;display:grid;
  grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.swatches li{display:flex;align-items:center;gap:11px;padding:10px 12px;
  border:1px solid var(--line);border-radius:10px;background:var(--white);font-size:.92rem;font-weight:500}
.swatch-dot{width:26px;height:26px;border-radius:7px;flex:0 0 auto;
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.09)}

/* ---------- Card grid (hub) ---------- */
.card-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;margin:26px 0 8px
}
.card{
  display:flex;flex-direction:column;padding:20px 20px 18px;border:1px solid var(--line);
  border-radius:var(--radius);background:var(--white);transition:border-color .18s,box-shadow .18s,transform .18s;
  color:inherit
}
.card:hover{border-color:var(--blue);box-shadow:var(--shadow);text-decoration:none;transform:translateY(-2px)}
.card .k{font-size:.7rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--blue);margin-bottom:9px}
.card h3{margin:0 0 7px;font-size:1.08rem;font-weight:700;color:var(--ink)}
.card p{margin:0;font-size:.9rem;color:var(--muted);line-height:1.55}
.card .go{margin-top:14px;font-size:.85rem;font-weight:600;color:var(--blue);display:inline-flex;align-items:center;gap:5px}
.card:hover .go{gap:9px}

/* related pills */
.pills{display:flex;flex-wrap:wrap;gap:9px;margin:14px 0 0;padding:0;list-style:none}
.pills a{
  display:inline-flex;align-items:center;gap:6px;font-size:.875rem;font-weight:500;
  padding:7px 14px;border:1px solid var(--line);border-radius:999px;color:var(--ink-2);background:var(--white)
}
.pills a:hover{border-color:var(--blue);color:var(--blue-strong);background:var(--blue-tint);text-decoration:none}

.related{margin-top:56px;padding-top:30px;border-top:1px solid var(--line)}
.related h2{margin-top:0}
.related h2::before{display:none}

/* ---------- Rail (right) ---------- */
.rail{position:sticky;top:calc(var(--header-h) + 22px);align-self:start;font-size:.9rem}
.rail-block{margin-bottom:28px}
.rail-title{
  font-size:.72rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  color:var(--faint);margin:0 0 12px;padding-left:14px
}
.toc nav{display:flex;flex-direction:column;border-left:2px solid var(--line)}
.toc a{
  color:var(--muted);padding:5px 0 5px 14px;margin-left:-2px;
  border-left:2px solid transparent;line-height:1.35;font-size:.885rem
}
.toc a:hover{color:var(--ink);text-decoration:none}
.toc a.lvl3{padding-left:26px;font-size:.845rem}
.toc a.active{color:var(--blue-strong);border-left-color:var(--blue);font-weight:600}

.rail-list{display:flex;flex-direction:column;gap:1px}
.rail-list a{
  color:var(--muted);padding:6px 12px;border-radius:8px;font-size:.885rem;line-height:1.35
}
.rail-list a:hover{background:var(--surface);color:var(--ink);text-decoration:none}
.rail-list a.current{background:var(--blue-tint);color:var(--blue-strong);font-weight:600}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--surface);margin-top:10px}
.footer-inner{
  max-width:var(--maxw);margin:0 auto;padding:52px 24px 34px;
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px
}
.foot-brand .brand{margin-bottom:14px}
.foot-brand p{font-size:.9rem;color:var(--muted);margin:0;max-width:34ch;line-height:1.6}
.foot-cols h4,.footer-inner h4{
  font-size:.74rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:var(--ink-2);margin:0 0 14px
}
.footer-inner nav{display:flex;flex-direction:column;gap:9px}
.footer-inner nav a{color:var(--muted);font-size:.9rem}
.footer-inner nav a:hover{color:var(--blue)}
.foot-base{
  border-top:1px solid var(--line);
}
.foot-base .fb-inner{
  max-width:var(--maxw);margin:0 auto;padding:20px 24px 34px;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:.82rem;color:var(--faint)
}
.foot-base a{color:var(--muted)}

/* ---------- Responsive ---------- */
@media (max-width:940px){
  .layout{grid-template-columns:1fr;gap:0}
  .rail{position:static;top:auto;margin:8px 0 30px;order:2;
    border-top:1px solid var(--line);padding-top:24px}
  .article{order:1;max-width:none}
  .toc nav{max-height:none}
  .footer-inner{grid-template-columns:1fr 1fr;gap:30px 32px}
}
@media (max-width:760px){
  body{font-size:16.5px}
  .nav-burger{display:flex}
  .site-nav{
    order:3;flex-basis:100%;flex-direction:column;align-items:stretch;gap:2px;
    margin:0;padding:8px 0 12px;display:none
  }
  .nav-toggle:checked ~ .site-nav{display:flex}
  .site-nav a{padding:11px 12px;border-radius:9px}
  .site-nav a.is-active::after{display:none}
  .site-nav a.is-active{background:var(--blue-tint)}
  .header-inner{flex-wrap:wrap;padding:0 18px;min-height:56px}
  .wrap{padding:0 18px}
  .article h2{margin-top:42px}
  .article h2::before{display:none}
  .footer-inner{grid-template-columns:1fr;gap:26px;padding:40px 18px 24px}
  .foot-base .fb-inner{padding:18px 18px 30px}
}

@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition:none!important}
}