:root{
  --paper:#F1F3EF; --panel:#FFFFFF; --ink:#1B2A24; --muted:#56655E; --rule:#CAD1CB;
  --climate:#1F6FA8; --bio:#B23A6E; --ochre:#9A6B16; --focus:#1F6FA8;
  --event:#8A948F; --demo-bg:#FBF3DF; --demo-ink:#6B4A0C;
  --serif:"Source Serif 4", Georgia, "Times New Roman", serif;
  --sans:"Public Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:#131B18; --panel:#1A2420; --ink:#E6ECE8; --muted:#9EABA4; --rule:#2F3B36;
    --climate:#5BA7DD; --bio:#E27AA6; --ochre:#D9A94A; --focus:#5BA7DD;
    --event:#6F7B76; --demo-bg:#2E2614; --demo-ink:#E8C77E;
  }
}
:root[data-theme="dark"]{
  --paper:#131B18; --panel:#1A2420; --ink:#E6ECE8; --muted:#9EABA4; --rule:#2F3B36;
  --climate:#5BA7DD; --bio:#E27AA6; --ochre:#D9A94A; --focus:#5BA7DD;
  --event:#6F7B76; --demo-bg:#2E2614; --demo-ink:#E8C77E;
}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.55;-webkit-font-smoothing:antialiased}
img{max-width:100%}
a{color:inherit}
:focus-visible{outline:2px solid var(--focus);outline-offset:3px;border-radius:2px}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* Header */
header.site{border-bottom:1px solid var(--rule)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand-mark{display:flex;gap:3px;align-items:flex-end;height:26px}
.brand-mark span{width:5px;border-radius:1px}
.brand-mark span:nth-child(1){height:10px;background:var(--climate)}
.brand-mark span:nth-child(2){height:18px;background:var(--bio)}
.brand-mark span:nth-child(3){height:26px;background:var(--ink)}
.brand-name{font-family:var(--serif);font-weight:700;font-size:1.3rem;letter-spacing:-.01em}
nav.main{display:flex;gap:4px;flex-wrap:wrap}
nav.main a{text-decoration:none;font-size:.95rem;font-weight:500;color:var(--muted);padding:8px 12px;border-radius:6px}
nav.main a:hover{color:var(--ink)}
nav.main a[aria-current="page"]{color:var(--ink);background:color-mix(in srgb,var(--ink) 7%,transparent)}

/* Type */
h1,h2,h3{font-family:var(--serif);font-weight:600;line-height:1.15;letter-spacing:-.015em;margin:0}
h1{font-size:clamp(2.1rem,5vw,3.4rem);max-width:22ch}
h2{font-size:clamp(1.5rem,3vw,2rem)}
h3{font-size:1.2rem}
.lede{font-family:var(--serif);font-size:1.2rem;line-height:1.6;color:var(--muted);max-width:60ch;margin:16px 0 0}
.prose{max-width:68ch}
.prose p,.prose li{font-family:var(--serif);font-size:1.08rem;line-height:1.7}
.prose h2{margin:40px 0 12px}
.prose h3{margin:28px 0 8px}
.small{font-size:.88rem;color:var(--muted)}
.num{font-variant-numeric:tabular-nums}

main.wrap{padding-top:48px;padding-bottom:80px}
section+section{margin-top:72px}

/* Chart panel */
.panel{background:var(--panel);border:1px solid var(--rule);border-radius:10px;padding:20px 20px 12px;margin-top:32px}
.controls{display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;margin-bottom:12px}
.group{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.group-label{font-size:.85rem;color:var(--muted);margin-right:4px}
.toggle{font:inherit;font-size:.9rem;font-weight:500;color:var(--ink);background:transparent;border:1px solid var(--rule);border-radius:999px;padding:5px 12px;cursor:pointer;display:inline-flex;align-items:center;gap:8px}
.toggle[aria-pressed="true"]{border-color:var(--ink);background:color-mix(in srgb,var(--ink) 6%,transparent)}
.toggle[aria-pressed="false"]{color:var(--muted)}
.swatch{width:14px;height:3px;border-radius:2px;display:inline-block}
.toggle[aria-pressed="false"] .swatch{opacity:.35}
.chart{position:relative;width:100%}
.chart svg{display:block;width:100%;height:auto;overflow:visible}
.chart .axis text{font-family:var(--sans);font-size:12px;fill:var(--muted)}
.chart .grid line{stroke:var(--rule);stroke-width:1}
.chart .baseline{stroke:var(--muted);stroke-dasharray:3 4;stroke-width:1}
.chart .event line{stroke:var(--event);stroke-width:1}
.chart .event text{font-size:11.5px;fill:var(--muted);font-family:var(--sans)}
.tip{position:absolute;pointer-events:none;background:var(--ink);color:var(--paper);font-size:.82rem;line-height:1.4;padding:8px 10px;border-radius:6px;white-space:nowrap;opacity:0;transition:opacity .12s;z-index:2}
.tip b{font-weight:600}
.tip .row{display:flex;align-items:center;gap:6px}
.demo-note{display:flex;gap:10px;align-items:flex-start;background:var(--demo-bg);color:var(--demo-ink);font-size:.86rem;line-height:1.45;padding:9px 12px;border-radius:6px;margin:8px 0 4px}
.demo-note svg{flex:none;margin-top:2px}

/* Readings */
.readings{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:0;margin-top:24px;border-top:1px solid var(--rule)}
.reading{padding:16px 20px 16px 0;border-bottom:1px solid var(--rule)}
.reading .name{display:flex;align-items:center;gap:8px;font-weight:600;font-size:.95rem}
.reading .val{font-family:var(--serif);font-size:2.2rem;font-weight:600;line-height:1.1;margin-top:6px}
.reading .chg{font-size:.9rem;color:var(--muted)}

/* Catalogue table */
.catalogue{margin-top:24px}
.family{margin-top:32px}
.family h3{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
.family h3 .src{font-family:var(--sans);font-size:.9rem;font-weight:400;color:var(--muted);letter-spacing:0}
.table-scroll{overflow-x:auto;margin-top:10px}
table.idx{width:100%;border-collapse:collapse;min-width:640px}
table.idx th{text-align:left;font-size:.82rem;font-weight:600;color:var(--muted);padding:8px 12px 8px 0;border-bottom:1px solid var(--ink)}
table.idx td{padding:14px 12px 14px 0;border-bottom:1px solid var(--rule);vertical-align:top;font-size:.95rem}
table.idx td:first-child{width:42%}
table.idx a.idx-link{font-weight:600;text-decoration:none;display:inline-flex;align-items:center;gap:8px}
table.idx a.idx-link:hover{text-decoration:underline}
table.idx .desc{display:block;color:var(--muted);font-size:.88rem;margin-top:2px}
.status{display:inline-flex;align-items:center;gap:6px;font-size:.85rem;font-weight:500;white-space:nowrap}
.status::before{content:"";width:8px;height:8px;border-radius:50%;background:currentColor}
.status.pub{color:var(--climate)}
.status.dev{color:var(--ochre)}
.status.plan{color:var(--muted)}

/* Index page */
.crumb{font-size:.9rem;color:var(--muted);text-decoration:none;display:inline-block;margin-bottom:20px}
.crumb:hover{color:var(--ink)}
.idx-head{display:flex;gap:10px;align-items:center;margin-bottom:10px}
.meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:16px 24px;margin-top:28px;padding:18px 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.meta dt{font-size:.82rem;color:var(--muted)}
.meta dd{margin:2px 0 0;font-weight:600}
.two-col{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;margin-top:40px}
@media (max-width:860px){.two-col{grid-template-columns:1fr;gap:24px}}
aside.cite{background:var(--panel);border:1px solid var(--rule);border-radius:10px;padding:20px;align-self:start}
aside.cite h3{font-size:1.05rem;margin-bottom:8px}
aside.cite p{font-size:.92rem;margin:0 0 14px}
.btn{font:inherit;font-weight:600;font-size:.95rem;display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:8px;border:1px solid var(--ink);background:var(--ink);color:var(--paper);cursor:pointer;text-decoration:none}
.btn.ghost{background:transparent;color:var(--ink)}
.btn[hidden]{display:none}
.btn-row{display:flex;gap:10px;flex-wrap:wrap}
.feedback{font-size:.85rem;color:var(--muted);margin-top:8px;min-height:1.2em}
.roadmap{border-left:3px solid var(--ochre);padding:4px 0 4px 18px;margin-top:24px}

footer.site{border-top:1px solid var(--rule);padding:32px 0 48px;font-size:.88rem;color:var(--muted)}
footer.site .wrap{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}

@media (max-width:600px){
  body{font-size:16px}
  .wrap{padding:0 18px}
  .panel{padding:14px 12px 8px}
  main.wrap{padding-top:32px}
}
@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}

/* Construction panel */
.build{margin-top:56px}
.build-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:40px;margin-top:20px}
@media (max-width:860px){.build-grid{grid-template-columns:1fr;gap:28px}}
.bars{display:grid;grid-template-columns:auto 1fr auto;gap:8px 12px;align-items:center;font-size:.92rem}
.bars .bar{height:10px;border-radius:2px;background:color-mix(in srgb,var(--ink) 8%,transparent);position:relative}
.bars .bar span{position:absolute;top:0;bottom:0;border-radius:2px}
.steps{margin:0;padding-left:1.2em}
.steps li{margin:0 0 8px;font-size:.95rem}
.built{font-size:.82rem;color:var(--muted);margin-top:8px}
.loading{color:var(--muted);padding:40px 0}

details.more{margin-top:12px}
details.more summary{cursor:pointer;font-size:.9rem;font-weight:500;color:var(--ink)}
details.more .bars{margin-top:10px}
.coverage,.robust{margin-top:40px}
.robust .panel{margin-top:16px}

.method{margin-top:48px;padding-top:32px;border-top:1px solid var(--rule)}
.method-indices{font-family:var(--sans)!important;font-size:.95rem!important;display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.method-indices a{display:inline-flex;align-items:center;gap:6px;font-weight:600;text-decoration:none}
.prose ol,.prose ul{padding-left:1.3em}
.prose a{color:var(--climate)}
aside.cite a{color:var(--climate);font-weight:500;white-space:nowrap}
a.paper-link{color:var(--climate);font-size:.92rem;font-weight:500}
.demo-note.internal{margin:0 0 16px}