/* Data Layers site. Plain CSS. No framework, no web fonts, no animation. */
:root{
  --bg:#fbfaf7; --fg:#1c1b19; --muted:#5f5b53; --rule:#dcd7cb; --panel:#f1eee6;
  --accent:#1f3a5f; --accent2:#8a5a12; --link:#1f4e8c;
  --v:#1d6b3a; --r:#8a5a12; --u:#a3281f;
  --serif:Charter,"Iowan Old Style","Palatino Linotype",Georgia,serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --z-header:10; --z-results:20;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#161512;--fg:#ece8dd;--muted:#a9a395;--rule:#36332c;--panel:#201e1a;--accent:#9fc0ec;--accent2:#e0b061;--link:#8db8f0;--v:#6fcf93;--r:#e0b061;--u:#ff8f84}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:4.5rem}
body{margin:0;background:var(--bg);color:var(--fg);font:1.0625rem/1.65 var(--serif);min-height:100dvh;
  padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}
a{color:var(--link);text-underline-offset:.15em}
h1,h2,h3,h4{font-family:var(--sans);line-height:1.25;text-wrap:balance;margin:2rem 0 .6rem}
h1{font-size:clamp(1.7rem,4.5vw,2.4rem);margin-top:1rem}
h2{font-size:1.45rem;border-top:1px solid var(--rule);padding-top:1.2rem}
h3{font-size:1.15rem}
h4{font-size:1rem}
p,li,blockquote{text-wrap:pretty}
.wrap{max-width:62rem;margin:0 auto;padding:0 1.1rem}
main{padding-bottom:4rem}
main .prose>*:not(.tablewrap):not(.diagram):not(.chart):not(.tabs):not(.controls):not(pre){max-width:46rem}
.tabpanel>*:not(.tablewrap):not(.diagram):not(pre){max-width:46rem}
code{font:.88em var(--mono);background:var(--panel);padding:.08em .3em;border-radius:3px;overflow-wrap:anywhere}
pre{background:var(--panel);padding:.9rem 1rem;overflow-x:auto;border-radius:4px;font:.85rem/1.5 var(--mono)}
pre code{background:none;padding:0}
blockquote{margin:1rem 0;padding:.2rem 1rem;border-left:3px solid var(--accent);background:var(--panel)}
hr{border:0;border-top:1px solid var(--rule);margin:1.5rem 0}
/* header */
.site-header{position:sticky;top:0;z-index:var(--z-header);background:var(--bg);border-bottom:1px solid var(--rule);padding-top:env(safe-area-inset-top)}
.bar{display:flex;gap:1rem;align-items:center;flex-wrap:wrap;padding-top:.55rem;padding-bottom:.55rem}
.brand{font:700 1rem var(--sans);color:var(--fg);text-decoration:none;margin-right:.4rem}
nav.primary{display:flex;gap:.2rem .9rem;flex-wrap:wrap;font:.9rem var(--sans);flex:1 1 auto}
nav.primary a{color:var(--muted);text-decoration:none;padding:.5rem .1rem;min-height:2.75rem;display:inline-flex;align-items:center}
nav.primary a:hover,nav.primary a[aria-current=page]{color:var(--fg);box-shadow:inset 0 -2px var(--accent)}
.search{position:relative;flex:0 1 16rem;min-width:11rem}
.search input{width:100%;font:.9rem var(--sans);padding:.6rem .7rem;min-height:2.75rem;border:1px solid var(--rule);border-radius:4px;background:var(--bg);color:var(--fg)}
.search-results{position:absolute;right:0;top:100%;width:min(34rem,92vw);max-height:70dvh;overflow:auto;background:var(--bg);border:1px solid var(--rule);border-radius:4px;box-shadow:0 6px 18px rgba(0,0,0,.15);z-index:var(--z-results);font:.9rem/1.4 var(--sans);margin-top:.25rem}
.search-results[hidden]{display:none}
.search-results a{display:block;padding:.6rem .8rem;text-decoration:none;color:var(--fg);border-bottom:1px solid var(--rule)}
.search-results a:last-child{border:0}
.search-results a:hover,.search-results a.active{background:var(--panel)}
.search-results .where{color:var(--muted);font-size:.78rem}
.search-results .snip{color:var(--muted);display:block;margin-top:.15rem}
.search-results mark{background:#ffe9a8;color:#000;padding:0 .1em}
.search-results .none{padding:.8rem;color:var(--muted)}
/* tags */
.tag{font:700 .72em var(--sans);padding:.05em .3em;border-radius:3px;border:1px solid currentColor;font-variant-numeric:tabular-nums}
.tag-V{color:var(--v)}.tag-R{color:var(--r)}.tag-U{color:var(--u)}.tag-mix{color:var(--muted)}
mark.unv{background:none;color:var(--u);font-weight:600}
mark.ver{background:none;color:var(--v);font-weight:600}
.legend{font:.85rem var(--sans);color:var(--muted);border:1px solid var(--rule);padding:.5rem .8rem;border-radius:4px;margin:1rem 0;background:var(--panel)}
/* tables */
.tablewrap{overflow-x:auto;margin:1rem 0;border:1px solid var(--rule);border-radius:4px;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;font:.88rem/1.45 var(--sans);width:100%;min-width:34rem;font-variant-numeric:tabular-nums}
th,td{padding:.5rem .7rem;border-bottom:1px solid var(--rule);text-align:left;vertical-align:top}
th{background:var(--panel);position:sticky;top:0;white-space:nowrap}
tr:last-child td{border-bottom:0}
td{overflow-wrap:break-word}
table.sortable th{cursor:pointer}
table.sortable th[aria-sort=ascending]::after{content:" \25B2";font-size:.7em}
table.sortable th[aria-sort=descending]::after{content:" \25BC";font-size:.7em}
/* toc */
details.toc{font:.9rem var(--sans);border:1px solid var(--rule);border-radius:4px;padding:.5rem .9rem;margin:1rem 0;background:var(--panel);max-width:46rem}
details.toc summary{cursor:pointer;min-height:2rem;display:flex;align-items:center}
details.toc ol{margin:.4rem 0;padding-left:1.2rem}
details.toc li{margin:.15rem 0}
/* home */
.thesis{font:700 clamp(1.6rem,4.2vw,2.5rem)/1.2 var(--sans);text-wrap:balance;margin:1.6rem 0 1rem;max-width:44rem}
.lede{color:var(--muted);max-width:44rem}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(18rem,1fr));gap:1rem;margin:1rem 0}
.card{border:1px solid var(--rule);border-radius:6px;padding:1rem 1.1rem;background:var(--panel);display:flex;flex-direction:column;gap:.5rem}
.card h3{margin:0}
.card .score{font:700 2rem var(--sans);font-variant-numeric:tabular-nums}
.card .score small{font-size:.9rem;color:var(--muted);font-weight:400}
.card p{margin:0;font-size:.98rem}
.card .levels{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:auto;font:.88rem var(--sans)}
.card .levels a{border:1px solid var(--rule);padding:.5rem .7rem;border-radius:4px;background:var(--bg);text-decoration:none;min-height:2.75rem;display:inline-flex;align-items:center}
.headline{display:grid;grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));gap:1rem;margin:1rem 0}
.headline .cell{border-top:3px solid var(--accent);padding-top:.5rem}
.headline .cell .label{font:.82rem var(--sans);color:var(--muted)}
.headline .cell .num{font:700 2.1rem var(--sans);font-variant-numeric:tabular-nums}
.headline .cell p{font-size:.92rem;margin:.2rem 0 0}
.linklist{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(17rem,1fr));gap:.6rem 1.2rem}
.linklist li{border-top:1px solid var(--rule);padding-top:.5rem}
.linklist a{font:600 1rem var(--sans)}
.linklist span{display:block;font:.88rem var(--sans);color:var(--muted)}
/* chart */
.chart{margin:1.2rem 0;border:1px solid var(--rule);border-radius:6px;padding:1rem;background:var(--panel);font:.88rem var(--sans)}
.chart h3{margin:0 0 .2rem}
.chart .key{display:flex;gap:1.2rem;flex-wrap:wrap;margin:.4rem 0 .9rem;color:var(--muted)}
.chart .sw{display:inline-block;width:.8rem;height:.8rem;margin-right:.35rem;vertical-align:-.1rem;border-radius:2px}
.chart .row{margin:.7rem 0}
.chart .row .lbl{margin-bottom:.2rem}
.chart .bar-line{display:grid;grid-template-columns:1fr 2.2rem;align-items:center;gap:.5rem;margin:.15rem 0}
.chart .track{height:.7rem;background:var(--rule);border-radius:2px;position:relative}
.chart .fill{height:100%;border-radius:2px}
.chart .fill.a{background:var(--accent)}.chart .fill.b{background:var(--accent2)}
.chart .val{font-weight:700;text-align:right;font-variant-numeric:tabular-nums}
.chart .scale{display:grid;grid-template-columns:1fr 2.2rem;gap:.5rem}
.chart .scale div{display:flex;justify-content:space-between;color:var(--muted);font-size:.75rem}
.chart .avg{border-top:1px solid var(--rule);padding-top:.6rem;margin-top:1rem}
.chart .note{color:var(--muted);font-size:.8rem;margin:.6rem 0 0}
/* tabs */
.tabs{margin:1.2rem 0}
.tablist{display:none;gap:.3rem;border-bottom:1px solid var(--rule);flex-wrap:wrap}
.js .tablist{display:flex}
.tablist button{font:600 .95rem var(--sans);padding:.7rem 1rem;min-height:2.75rem;border:1px solid var(--rule);border-bottom:0;border-radius:5px 5px 0 0;background:var(--panel);color:var(--muted);cursor:pointer}
.tablist button[aria-selected=true]{background:var(--bg);color:var(--fg);box-shadow:inset 0 3px var(--accent);position:relative;top:1px}
.tablist button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.js .tabpanel[hidden]{display:none}
.tabpanel h2:first-child{margin-top:1.2rem;border-top:0;padding-top:0}
/* diagrams */
figure.diagram{margin:1.2rem 0;overflow-x:auto;border:1px solid var(--rule);border-radius:4px;padding:.8rem;background:#fff}
figure.diagram svg{display:block;margin:0 auto;height:auto!important;width:100%!important;max-width:none;min-width:36rem}
figure.diagram svg[style]{max-width:none!important}
/* kb */
.controls{display:flex;gap:.6rem;flex-wrap:wrap;align-items:center;margin:1rem 0;font:.9rem var(--sans)}
.controls input,.controls select{font:inherit;padding:.6rem .7rem;min-height:2.75rem;border:1px solid var(--rule);border-radius:4px;background:var(--bg);color:var(--fg)}
.controls input{flex:1 1 14rem}
.controls .count{color:var(--muted)}
.srclist{font:.9rem var(--sans);padding-left:1.2rem}
.srclist li{margin:.3rem 0;overflow-wrap:anywhere}
.status{font-size:.75rem;border:1px solid var(--rule);border-radius:3px;padding:0 .3rem;color:var(--muted)}
footer.site-footer{border-top:1px solid var(--rule);padding:1.2rem 0 2rem;font:.82rem var(--sans);color:var(--muted)}
@media (max-width:640px){
  .site-header{position:static}
  html{scroll-padding-top:1rem}
  .tablist button{flex:1 1 auto;padding:.6rem .5rem;font-size:.82rem}
  nav.primary{gap:.1rem .7rem}
  body{font-size:1rem}
  .search{flex:1 1 100%}
  .search-results{left:0;right:auto;width:100%}
}
@media print{.site-header,.controls,.tablist{display:none}.js .tabpanel[hidden]{display:block}}