/* Documentation pages — shares the palette and typography of index.html.
   Generated pages link this file; edit here, not in the generated HTML. */
:root{
  --ink:#0f1216; --mut:#5d6773; --line:#e4e8ed; --bg:#fff; --soft:#f7f9fb;
  --acc:#0b6b57; --acc2:#12a37f; --accs:#e6f2ef; --max:1000px;
  --disp:"Space Grotesk",Inter,-apple-system,sans-serif;
  --lead:#28303a; --panel:#fff; --nav-bg:rgba(255,255,255,.86);
  --code-bg:#0f1216; --code-fg:#e9edf2; --code-edge:transparent;
  --quote-bg:rgba(230,242,239,.86); --table-bg:rgba(255,255,255,.55);
  --page-grad:linear-gradient(180deg,#fdfefe 0%,#fff 34%,#fbfcfd 80%,#f7f9fb 100%);
  --mesh-grad:radial-gradient(32% 28% at 16% 10%,rgba(11,107,87,.10),transparent 62%),
              radial-gradient(28% 24% at 86% 20%,rgba(20,96,140,.065),transparent 62%),
              radial-gradient(34% 30% at 60% 86%,rgba(11,107,87,.055),transparent 62%);
  --scan-grad:linear-gradient(96deg,transparent 0%,rgba(11,107,87,.04) 42%,
              rgba(255,255,255,.5) 50%,rgba(20,96,140,.035) 58%,transparent 100%);
  --grain-blend:multiply; --grain-op:.026; --grat-filter:none; --grat-op:1;
}

/* Dark theme. Mirrors index.html: the media query is the default and
   [data-theme] is the explicit choice the nav button stores. */
:root[data-theme="dark"]{
  --ink:#e7edf2; --mut:#93a3b0; --line:#232c34; --bg:#0b0f12; --soft:#131a20;
  --acc:#3cc9a3; --acc2:#6fe6c3; --accs:rgba(60,201,163,.13);
  --lead:#c6d1db; --panel:#151d24; --nav-bg:rgba(11,15,18,.82);
  --code-bg:#070b0e; --code-fg:#dde5ec; --code-edge:#1d262d;
  --quote-bg:rgba(60,201,163,.10); --table-bg:rgba(21,29,36,.55);
  --page-grad:linear-gradient(180deg,#0c1114 0%,#0b0f12 34%,#0a1013 76%,#080d10 100%);
  --mesh-grad:radial-gradient(32% 28% at 16% 10%,rgba(60,201,163,.10),transparent 62%),
              radial-gradient(28% 24% at 86% 20%,rgba(52,140,190,.08),transparent 62%),
              radial-gradient(34% 30% at 60% 86%,rgba(60,201,163,.06),transparent 62%);
  --scan-grad:linear-gradient(96deg,transparent 0%,rgba(60,201,163,.05) 42%,
              rgba(150,220,205,.09) 50%,rgba(52,140,190,.05) 58%,transparent 100%);
  --grain-blend:screen; --grain-op:.05; --grat-filter:invert(1); --grat-op:.42;
}
@media(prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --ink:#e7edf2; --mut:#93a3b0; --line:#232c34; --bg:#0b0f12; --soft:#131a20;
  --acc:#3cc9a3; --acc2:#6fe6c3; --accs:rgba(60,201,163,.13);
  --lead:#c6d1db; --panel:#151d24; --nav-bg:rgba(11,15,18,.82);
  --code-bg:#070b0e; --code-fg:#dde5ec; --code-edge:#1d262d;
  --quote-bg:rgba(60,201,163,.10); --table-bg:rgba(21,29,36,.55);
  --page-grad:linear-gradient(180deg,#0c1114 0%,#0b0f12 34%,#0a1013 76%,#080d10 100%);
  --mesh-grad:radial-gradient(32% 28% at 16% 10%,rgba(60,201,163,.10),transparent 62%),
              radial-gradient(28% 24% at 86% 20%,rgba(52,140,190,.08),transparent 62%),
              radial-gradient(34% 30% at 60% 86%,rgba(60,201,163,.06),transparent 62%);
  --scan-grad:linear-gradient(96deg,transparent 0%,rgba(60,201,163,.05) 42%,
              rgba(150,220,205,.09) 50%,rgba(52,140,190,.05) 58%,transparent 100%);
  --grain-blend:screen; --grain-op:.05; --grat-filter:invert(1); --grat-op:.42;
}}

.tbtn{background:none;border:1px solid var(--line);border-radius:8px;cursor:pointer;
  width:32px;height:32px;display:flex;align-items:center;justify-content:center;
  color:var(--acc);font-size:15px;line-height:1;padding:0;font-family:inherit;
  transition:color .16s ease,border-color .16s ease,background .16s ease}
.tbtn:hover{color:var(--ink);border-color:var(--mut);background:var(--soft)}
h1,h2,h3,h4,.kicker,nav .brand,.toc .t,article th{font-family:var(--disp)}
*{box-sizing:border-box}
html{scroll-behavior:smooth; scroll-padding-top:76px}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
a{color:var(--acc);text-decoration:none} a:hover{text-decoration:underline}

nav{position:sticky;top:0;z-index:50;background:var(--nav-bg);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
nav .wrap{display:flex;align-items:center;gap:26px;height:56px}
nav .brand{font-weight:700;letter-spacing:-.02em;margin-right:auto;color:var(--ink);
  display:flex;align-items:center;gap:8px}
nav .brand::before{content:"";width:7px;height:7px;border-radius:50%;flex:none;
  background:linear-gradient(135deg,var(--acc2),var(--acc))}
nav .brand:hover{text-decoration:none}
nav a{color:var(--mut);font-size:14.5px;font-weight:500}
nav a:hover{color:var(--ink);text-decoration:none}
@media(max-width:700px){nav .links{display:none}}

header.doc{padding:52px 0 30px;border-bottom:1px solid var(--line)}
.kicker{color:var(--acc);font-size:12.5px;font-weight:600;letter-spacing:.1em;
  text-transform:uppercase;margin:0 0 10px;display:flex;align-items:center;gap:10px}
.kicker::before{content:"";width:22px;height:2px;border-radius:2px;flex:none;
  background:linear-gradient(90deg,var(--acc),var(--acc2))}
header.doc h1{font-size:clamp(30px,4.4vw,42px);line-height:1.12;font-weight:700;
  letter-spacing:-.028em;margin:0 0 12px;color:var(--ink)}
@supports (-webkit-background-clip:text){
  header.doc h1{background:linear-gradient(162deg,var(--ink) 34%,#14705c 78%,var(--acc2));
    -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
}
header.doc .sub{font-size:18px;color:var(--mut);max-width:720px;margin:0}

.layout{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:44px;
  align-items:start;padding:40px 0 10px}
@media(max-width:900px){.layout{grid-template-columns:minmax(0,1fr);gap:0}}

article{max-width:760px;min-width:0}
article h2{font-size:26px;font-weight:600;letter-spacing:-.02em;margin:42px 0 12px;
  padding-top:6px}
article h2:first-child{margin-top:0}
article h3{font-size:18.5px;font-weight:600;margin:30px 0 10px}
article p{margin:0 0 16px}
article ul,article ol{margin:0 0 18px;padding-left:22px}
article li{margin:0 0 9px}
article li>ul,article li>ol{margin:9px 0 0}
article strong{font-weight:650}
article hr{border:none;border-top:1px solid var(--line);margin:34px 0}
article blockquote{margin:20px 0;padding:15px 19px;
  background:linear-gradient(120deg,var(--accs),#f3f9f7 70%);
  border-left:3px solid var(--acc);border-radius:0 9px 9px 0;color:var(--lead)}
article blockquote p:last-child{margin:0}

table{width:100%;border-collapse:collapse;font-size:15.5px;margin:18px 0 24px;
  display:block;overflow-x:auto;white-space:normal}
th,td{padding:11px 13px;text-align:left;border-bottom:1px solid var(--line);
  vertical-align:top}
th{font-weight:600;font-size:12.5px;text-transform:uppercase;letter-spacing:.05em;
  color:var(--mut);white-space:nowrap}

pre{background:var(--code-bg);color:var(--code-fg);border:1px solid var(--code-edge);padding:18px 20px;border-radius:11px;
  overflow-x:auto;font-family:"JetBrains Mono",monospace;font-size:13.5px;
  line-height:1.62;margin:0 0 18px}
pre code{background:none;border:none;padding:0;color:inherit;font-size:inherit}
code{font-family:"JetBrains Mono",monospace;font-size:.9em}
p code,li code,td code,h2 code,h3 code{background:var(--soft);padding:2px 6px;
  border-radius:5px;border:1px solid var(--line)}

.toc{position:sticky;top:80px;font-size:14px;line-height:1.5}
.toc .t{font-size:12px;font-weight:600;letter-spacing:.07em;text-transform:uppercase;
  color:var(--mut);margin:0 0 12px}
.toc a{display:block;color:var(--mut);padding:5px 0 5px 12px;
  border-left:2px solid var(--line)}
.toc a:hover{color:var(--ink);border-left-color:var(--acc);text-decoration:none}
@media(max-width:900px){.toc{display:none}}

.backrow{border-top:1px solid var(--line);padding:26px 0 0;margin-top:40px;
  display:flex;gap:18px;flex-wrap:wrap;font-size:15px}
footer{padding:34px 0 56px;text-align:center;color:var(--mut);font-size:14.5px}
footer p{margin:0 0 6px}

/* ---------- polish: depth, motion, focus ---------------------------------- */
#prog{position:fixed;top:0;left:0;height:2px;width:0;z-index:60;
  background:linear-gradient(90deg,var(--acc),var(--acc2));transition:width .08s linear}

a:focus-visible,button:focus-visible{outline:2px solid var(--acc);outline-offset:3px;
  border-radius:4px}
article a{text-underline-offset:2px;text-decoration-color:rgba(11,107,87,.35);
  text-decoration-line:underline;transition:text-decoration-color .18s ease}
article a:hover{text-decoration-color:var(--acc)}

nav .links a{position:relative}
nav .links a::after{content:"";position:absolute;left:0;right:0;bottom:-19px;height:2px;
  background:var(--acc);transform:scaleX(0);transition:transform .22s ease}
nav .links a:hover::after{transform:scaleX(1)}

header.doc{position:relative;overflow:hidden}
header.doc::before{content:"";position:absolute;inset:-60% -20% auto -20%;height:200%;
  background:radial-gradient(40% 44% at 18% 10%,rgba(11,107,87,.09),transparent 62%),
             radial-gradient(38% 40% at 86% 0%,rgba(11,107,87,.06),transparent 60%);
  animation:drift 24s ease-in-out infinite alternate;pointer-events:none;z-index:-1}
@keyframes drift{from{transform:translate3d(-1.5%,0,0) scale(1)}
                 to{transform:translate3d(1.5%,2%,0) scale(1.05)}}

article h2{scroll-margin-top:86px}
article h2 .anchor{opacity:0;margin-left:.4em;color:var(--mut);font-weight:400;
  text-decoration:none;transition:opacity .16s ease}
article h2:hover .anchor{opacity:.55}
article h2 .anchor:hover{opacity:1;color:var(--acc);text-decoration:none}

.js article>*{opacity:0;transform:translateY(10px);
  transition:opacity .5s ease,transform .5s ease}
.js article>.in,.js article.lit>*{opacity:1;transform:none}

tbody tr{transition:background .18s ease}
tbody tr:hover{background:var(--soft)}

pre{position:relative}
.copy{position:absolute;top:10px;right:10px;background:rgba(255,255,255,.1);
  color:#cfd6de;border:1px solid rgba(255,255,255,.16);border-radius:6px;
  padding:4px 10px;font-size:12px;cursor:pointer;font-family:Inter,sans-serif;
  opacity:0;transition:opacity .16s ease,background .16s ease,color .16s ease}
pre:hover .copy,.copy:focus-visible{opacity:1}
.copy:hover{background:rgba(255,255,255,.18);color:#fff}

.toc a{transition:color .16s ease,border-left-color .16s ease,
  background .16s ease,padding-left .16s ease}
.toc a.act{color:var(--ink);border-left-color:var(--acc);font-weight:500}

.backrow a{color:var(--mut)}
.backrow a:hover{color:var(--acc)}

@media(prefers-reduced-motion:reduce){
  header.doc::before{animation:none}
  .js article>*{opacity:1;transform:none;transition:none}
  #prog{transition:none}
}

/* ---------- background: graticule, drift, satellite pass, grain ----------- */
/* The canvas carries the theme colour; #bg lays its gradient over it. */
html{background:var(--bg)}
body{background:transparent}
#bg{position:fixed;inset:0;z-index:-2;pointer-events:none;overflow:hidden;
  background:var(--page-grad)}
#bg>div{position:absolute}
#bg .mesh{inset:-30%;background:var(--mesh-grad);
  animation:meshdrift 46s ease-in-out infinite alternate}
#bg .graticule{inset:-6%;background:url("static/grid.svg") repeat;
  background-size:520px 520px;animation:gridpan 120s linear infinite;
  filter:var(--grat-filter);opacity:var(--grat-op);
  -webkit-mask-image:radial-gradient(76% 62% at 50% 26%,#000 30%,transparent 82%);
  mask-image:radial-gradient(76% 62% at 50% 26%,#000 30%,transparent 82%)}
#bg .scan{top:-40%;left:-45%;width:55%;height:190%;transform:rotate(11deg);
  background:var(--scan-grad);animation:pass 40s linear infinite}
#bg .grain{inset:0;background:url("static/noise.svg") repeat;background-size:180px 180px;
  opacity:var(--grain-op);mix-blend-mode:var(--grain-blend)}
@keyframes meshdrift{
  0%{transform:translate3d(-2%,-1%,0) scale(1)}
  50%{transform:translate3d(1.5%,1.5%,0) scale(1.06)}
  100%{transform:translate3d(2%,-1.5%,0) scale(1.02)}}
@keyframes gridpan{from{background-position:0 0}to{background-position:520px 520px}}
@keyframes pass{0%{left:-45%;opacity:0}8%{opacity:1}
                92%{opacity:1}100%{left:125%;opacity:0}}

header.doc,article,.toc{background:transparent}
article blockquote{background:var(--quote-bg);backdrop-filter:blur(6px)}
article table{background:var(--table-bg);border-radius:10px}

@media(prefers-reduced-motion:reduce){
  #bg .mesh,#bg .graticule,#bg .scan{animation:none}
}