:root{--bg:#fbfaf7;--fg:#1d1d1f;--mut:#6b6b70;--line:#e3e0d8;--acc:#8a5a2b;--card:#fff;--chip:#f2efe8}
@media (prefers-color-scheme:dark){:root{--bg:#141416;--fg:#e8e6e3;--mut:#9a978f;--line:#2c2c30;--acc:#d8a86a;--card:#1b1b1e;--chip:#232327}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.65 ui-serif,Georgia,'Iowan Old Style',serif;-webkit-text-size-adjust:100%}
.nav{position:sticky;top:0;z-index:9;display:flex;gap:.5rem;align-items:center;padding:.55rem .8rem;
  border-bottom:1px solid var(--line);background:var(--bg);font:600 13px/1.2 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
.nav .spacer{flex:1}
.nav a{display:inline-block;max-width:38vw;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;
  color:var(--fg);background:var(--card);border:1px solid var(--line);border-radius:999px;padding:.42rem .8rem;text-decoration:none}
.nav a:hover{border-color:var(--acc);color:var(--acc)}
.nav span.off{opacity:.35;border:1px solid var(--line);border-radius:999px;padding:.42rem .8rem}
main{max-width:46rem;margin:0 auto;padding:2rem 1.15rem 5rem}
h1{font-size:1.45rem;line-height:1.3;margin:.2rem 0}
.sub{font:13px/1.4 ui-sans-serif,system-ui,sans-serif;color:var(--mut);margin-bottom:1.8rem}
h3{font:600 1.06rem/1.4 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  margin:2.4rem 0 .55rem;letter-spacing:.005em}
h3:first-of-type{margin-top:1.4rem}
p.cap{font:13px/1.5 ui-sans-serif,system-ui,sans-serif;color:var(--mut);margin:.6rem 0 1.2rem}
details.study{border:1px solid var(--line);border-radius:10px;background:var(--card);padding:.7rem .9rem;margin:0 0 1.8rem;
  font:14px/1.6 ui-sans-serif,system-ui,sans-serif}
details.study summary{cursor:pointer;font-weight:600}
details.study ol{margin:.6rem 0 .2rem;padding-left:1.2rem}
details.study li{margin:.35rem 0}
details.study p{margin:.6rem 0 0}
p.q{color:var(--fg)}
p.toclead{color:var(--mut);margin-top:.9rem}
ol.toc{columns:2;column-gap:1.6rem;font-size:13px;padding-left:1.2rem;margin-top:.3rem}
ol.toc li{margin:.25rem 0}
h3{scroll-margin-top:4.6rem}
p{margin:.85rem 0}
pre{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--acc);border-radius:6px;
  padding:.75rem .9rem;overflow-x:auto;font:13px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
figure{margin:1.5rem 0}
figure img{display:block;max-width:100%;height:auto;background:#fff;border:1px solid var(--line);border-radius:6px;cursor:zoom-in}
figure figcaption{font:12px/1.4 ui-sans-serif,system-ui,sans-serif;color:var(--mut);margin-top:.35rem}
body.zoom figure img{cursor:zoom-out}
figure img.full{position:fixed;inset:0;margin:auto;max-width:none;width:auto;height:auto;max-height:100vh;max-width:100vw;z-index:99;cursor:zoom-out;background:#fff}
.foot{margin-top:3rem;padding-top:1rem;border-top:1px solid var(--line);color:var(--mut);font:13px/1.5 ui-sans-serif,system-ui,sans-serif}
a{color:var(--acc)}
/* menu page */
.menu{font:16px/1.6 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;max-width:60rem}
.menu h1{font:600 1.7rem/1.25 ui-serif,Georgia,serif;margin:0 0 .35rem}
.menu h2{font:600 1.02rem/1.3 ui-serif,Georgia,serif;margin:2.2rem 0 .9rem;padding-bottom:.35rem;border-bottom:1px solid var(--line)}
.row{display:grid;grid-template-columns:minmax(14rem,1.4fr) minmax(0,2fr);gap:.5rem 1.1rem;padding:.62rem 0;
  border-bottom:1px solid var(--line);align-items:baseline}
.row:last-child{border-bottom:0}
.chips{display:flex;flex-wrap:wrap;gap:.4rem}
.chips a{display:inline-block;background:var(--chip);border:1px solid var(--line);border-radius:999px;
  padding:.2rem .62rem;font-size:12.5px;text-decoration:none;color:var(--fg)}
.chips a:hover{border-color:var(--acc);color:var(--acc)}
.note{color:var(--mut);font-size:12.5px}
.legend{margin-top:2.6rem;color:var(--mut);font-size:12.5px;line-height:1.7}
.legend b{color:var(--fg)}

.visuals{margin:0 0 2.4rem}
.visuals h2{font:600 1.05rem/1.3 ui-sans-serif,system-ui,sans-serif;margin:0 0 .3rem}
.visuals .lead{color:var(--mut);font:12.5px/1.5 ui-sans-serif,system-ui,sans-serif;margin:0 0 1rem}
.vcard{border:1px solid var(--line);background:var(--card);border-radius:12px;padding:.85rem .95rem 1rem;margin:0 0 1.1rem}
.vcard h3{font:600 .98rem/1.3 ui-sans-serif,system-ui,sans-serif;margin:.1rem 0 .2rem}
.vcard p{margin:.55rem 0 0;color:var(--mut);font:13px/1.55 ui-sans-serif,system-ui,sans-serif}
svg.viz{display:block;width:100%;height:auto;margin:.4rem 0 .1rem}
svg.viz text{font:12px/1.2 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;fill:var(--fg)}
svg.viz text.lbl{font-weight:600}
svg.viz text.sub{fill:var(--mut);font-size:10.5px}
svg.viz text.mid{text-anchor:middle}
svg.viz text.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:11px;fill:var(--fg)}
svg.viz rect.bx{fill:var(--chip);stroke:var(--line)}
svg.viz rect.bx.sm{fill:var(--card)}
svg.viz rect.bx.sm2{fill:rgba(138,90,43,.10);stroke:var(--acc)}
svg.viz rect.bx.ok{fill:rgba(63,157,99,.12);stroke:#3f9d63}
svg.viz rect.bx.bad{fill:rgba(192,80,77,.12);stroke:#c0504d}
svg.viz rect.cell{fill:var(--chip);stroke:var(--line)}
svg.viz rect.cell.ok{fill:rgba(63,157,99,.18);stroke:#3f9d63}
svg.viz rect.cell.bad{fill:rgba(192,80,77,.16);stroke:#c0504d}
svg.viz rect.cell.hi{fill:rgba(138,90,43,.22);stroke:var(--acc)}
svg.viz rect.bar{stroke:none}
svg.viz rect.bar.work{fill:var(--acc);opacity:.8}
svg.viz rect.bar.stall{fill:var(--mut);opacity:.32}
svg.viz rect.commit{fill:var(--acc);opacity:.45}
svg.viz line.axis,svg.viz path.axis{stroke:var(--line);stroke-width:1.3;fill:none}
svg.viz line.arw{stroke:var(--mut);stroke-width:1.6}
svg.viz line.arw.thin{stroke-dasharray:3 3;opacity:.75}
svg.viz line.strike{stroke:#c0504d;stroke-width:2}
svg.viz path.roof{fill:none;stroke:var(--acc);stroke-width:2}
svg.viz circle.pip{fill:var(--acc)}
svg.viz circle.pip2{fill:#3f9d63}

.stack{margin:0 0 2.8rem;--l1:#55557f;--l2:#2c6a89;--l3:#367347;--l4:#836210;--l5:#9a4a2c;--l6:#6b4a90}
@media (prefers-color-scheme:dark){.stack{--l1:#9a9ab8;--l2:#6fadc9;--l3:#74b98c;--l4:#d4ad55;--l5:#d08a63;--l6:#a98fd0}}
.stack .lead{color:var(--mut);font-size:13px;line-height:1.55;margin:0 0 1.15rem;max-width:54rem}
.stack .legend2{color:var(--mut);font-size:12px;line-height:1.5;margin:.9rem 0 0}
.layers{display:grid;gap:0}
.layer{display:grid;grid-template-columns:30px minmax(9.5rem,13rem) minmax(0,1fr);gap:0 .95rem;
  padding:.72rem 0;align-items:start;border-top:1px solid transparent}
.layer .rail{position:relative;align-self:stretch;min-height:2.9rem}
.layer .rail:before{content:"";position:absolute;left:6px;top:0;bottom:0;width:1.5px;background:var(--line)}
.layer:first-child .rail:before{top:50%}
.layer:last-child .rail:before{bottom:auto;height:50%}
.layer .cx{position:absolute;left:0;top:50%;transform:translateY(-50%);display:block}
.layer .cx .cxline{stroke:var(--c);stroke-width:1.5;fill:none}
.layer .cx .cxhead{fill:var(--c)}
.layer .band{border-left:3px solid var(--c);padding:.05rem 0 .05rem .6rem}
.layer .band .lno{display:block;font:600 11px/1 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  color:var(--c);letter-spacing:.06em}
.layer .band .ltit{display:block;font:600 .96rem/1.3 ui-sans-serif,system-ui,sans-serif;color:var(--fg);margin:.18rem 0 .12rem}
.layer .band .lgloss{display:block;color:var(--mut);font:12px/1.45 ui-sans-serif,system-ui,sans-serif}
.layer .comps{display:grid;grid-template-columns:repeat(auto-fill,minmax(10.5rem,1fr));gap:.42rem}
.comp{display:block;background:var(--chip);border:1px solid var(--line);border-left:3px solid var(--c);
  border-radius:7px;padding:.4rem .55rem;text-decoration:none;color:var(--fg)}
.comp b{display:block;font:600 12.5px/1.35 ui-sans-serif,system-ui,sans-serif}
.comp span{display:block;color:var(--mut);font:11px/1.35 ui-sans-serif,system-ui,sans-serif;margin-top:.1rem}
.comp:hover{border-color:var(--c)}
.comp:hover b{color:var(--c)}
.comp.miss{background:var(--card);border-style:dashed;border-left-style:solid;opacity:.75;cursor:default}
@media (max-width:720px){
.layer{grid-template-columns:24px minmax(0,1fr);gap:0 .7rem}
.layer .rail{grid-column:1;grid-row:1/span 2}
.layer .band{grid-column:2;grid-row:1}
.layer .comps{grid-column:2;grid-row:2;margin-top:.5rem;grid-template-columns:repeat(auto-fill,minmax(9.5rem,1fr))}
.layer .rail:before{left:5px}
}