/* The Seeds Beneath the Steps. Gypsum paper, lake-mud ink, seed brown, conifer green, quartz violet,
   and a pale ice blue for the Last Glacial Maximum. Layout arithmetic is checked at 390px: every
   grid child carries min-width:0 and every table sits in its own horizontal scroller. */
:root{
  --paper:#f3efe4; --paper2:#faf7ef; --panel:#fffdf7; --ink:#24261f; --muted:#5f6256; --faint:#8a8b7d;
  --rule:#d6d0bf; --rule2:#bfb8a4;
  --seed:#9a4f23; --seed-soft:rgba(154,79,35,.22); --pollen:#1f6b5e; --pollen-soft:rgba(31,107,94,.2);
  --osl:#6b5b95; --approx:#c77712; --ice:#dde8f0; --ice2:#eef3f6; --red:#b3372a;
  --serif:"Fraunces",Georgia,"Times New Roman",serif; --mono:"Martian Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:18px/1.62 var(--serif)}
main{max-width:1060px;margin:0 auto;padding:22px 24px 90px}
p{margin:0 0 1em;max-width:46rem}
a{color:var(--pollen);text-underline-offset:3px}
a:hover{color:var(--seed)}
h1,h2,h3{font-weight:500;line-height:1.06}
h1{font-size:clamp(2.6rem,7.4vw,5.6rem);letter-spacing:-.045em;margin:6px 0 20px;max-width:15ch}
h2{font-size:clamp(1.8rem,4.2vw,3rem);letter-spacing:-.03em;margin:6px 0 18px;max-width:22ch}
h3{font-size:1.35rem;margin:38px 0 10px;letter-spacing:-.01em}
q{quotes:"\201C" "\201D"}
code{font:.8em var(--mono);background:#ebe5d4;padding:1px 5px;border-radius:3px;overflow-wrap:anywhere}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums}
.calc{color:var(--seed)}

.skip{position:absolute;left:-9999px;top:10px;background:var(--panel);padding:10px 14px;z-index:9}
.skip:focus{left:12px}
:focus-visible{outline:3px solid var(--osl);outline-offset:3px;border-radius:2px}

.topline{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font:11px/1.6 var(--mono);letter-spacing:.08em;text-transform:uppercase;border-bottom:1px solid var(--ink);padding-bottom:12px}
.topline a{color:var(--ink);text-decoration:none}
.topline span{color:var(--muted)}

.hero{padding-top:18px}
.strata-art{display:block;width:100%;height:84px;margin:18px 0 8px}
.strata-art .s1{fill:#e6dcc4}.strata-art .s2{fill:#d9ccae}.strata-art .s3{fill:#e9e0cb}.strata-art .s4{fill:#cfc1a2}
.strata-art .prints ellipse{fill:#8d7b5c;opacity:.55}
.strata-art .seeds circle{fill:var(--seed);opacity:.7}
.dek{font-size:1.2rem;line-height:1.55;max-width:48rem}
.lede{font-size:1.1rem}

section{margin-top:74px;border-top:1px solid var(--ink);padding-top:26px}
.act{font:600 11px/1.5 var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--seed);margin:0 0 6px}

blockquote{margin:22px 0;padding:2px 0 2px 20px;border-left:3px solid var(--seed);max-width:48rem}
blockquote p{margin:0 0 6px}
blockquote cite{display:block;font:11.5px/1.7 var(--mono);font-style:normal;color:var(--muted)}
.claim-quote p{font-size:1.32rem;line-height:1.45}
.claim-quote.numbers p{font-size:1.14rem}

.anchor-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--rule2);border:1px solid var(--rule2);margin:26px 0 12px}
.anchor-grid>*{min-width:0}
.anchor-card{background:var(--panel);padding:18px 20px}
.anchor-card p{margin:0 0 6px}
.label{font:600 10.5px/1.6 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0 0 8px}
.kv{display:flex;justify-content:space-between;gap:10px;align-items:baseline;flex-wrap:wrap;border-bottom:1px dotted var(--rule);padding:4px 0}
.kv span{font:11px/1.5 var(--mono);color:var(--muted)}
.kv b{font-weight:500;font-size:.92rem}
.kv.big b{font-size:clamp(1.05rem,2.6vw,1.45rem)}

.status{font:12.5px/1.7 var(--mono);min-height:1.7em;color:var(--ink)}
.status.small{font-size:11.5px;color:var(--muted)}
.verdict-line{border-left:3px solid var(--pollen);padding:6px 0 6px 12px;background:rgba(31,107,94,.06);max-width:none}
.fine{font:11.5px/1.75 var(--mono);color:var(--muted)}
.small{font-size:.92rem}
.note{font-size:.95rem;border-left:3px solid var(--rule2);padding-left:14px;color:#3d4036}
.caution-note{border-left-color:var(--seed);background:rgba(154,79,35,.06);padding:12px 14px}

.segmented,.toolbar{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
.segmented>*,.toolbar>*{min-width:0}
button{font:600 12px/1.3 var(--mono);letter-spacing:.02em;min-height:44px;padding:10px 14px;border-radius:4px;cursor:pointer;
  border:1px solid var(--pollen);background:var(--pollen);color:#fff}
button:hover{background:#17574c}
button.ghost{background:transparent;color:var(--ink);border-color:var(--rule2)}
button.ghost:hover{border-color:var(--ink);background:rgba(0,0,0,.03)}
button.scenario{background:transparent;color:var(--seed);border-color:var(--seed)}
button.scenario:hover{background:rgba(154,79,35,.08)}
button[aria-pressed="true"],button.ghost[aria-pressed="true"],button[aria-pressed="true"]:hover,button.ghost[aria-pressed="true"]:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
button.scenario[aria-pressed="true"],button.scenario[aria-pressed="true"]:hover{background:var(--seed);color:#fff;border-color:var(--seed)}
button:disabled{opacity:.5;cursor:wait}
button.small{min-height:44px;padding:6px 10px;font-size:11px}
.segmented button{background:transparent;color:var(--ink);border-color:var(--rule2)}
.segmented button[aria-pressed="true"],.segmented button[aria-pressed="true"]:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.segmented button:hover{background:rgba(0,0,0,.04)}

.instrument{background:var(--paper2);border:1px solid var(--rule2);border-radius:6px;padding:18px 20px;margin:22px 0}
.legend{display:flex;flex-wrap:wrap;gap:6px 18px;font:11px/1.6 var(--mono);color:var(--muted);margin:8px 0 2px}
.legend span::before{content:"";display:inline-block;width:16px;height:8px;margin-right:6px;vertical-align:middle;border-radius:2px}
.legend .k-seed::before{background:var(--seed)}.legend .k-pollen::before{background:var(--pollen)}
.legend .k-osl::before{background:var(--osl)}.legend .k-lgm::before{background:var(--ice);border:1px solid #b9ccd9}

figure.plot{margin:14px 0 8px;min-width:0}
figure.plot svg{display:block;max-width:100%;overflow:visible}
figcaption{font:11.5px/1.65 var(--mono);color:var(--muted);margin-top:8px;max-width:48rem}

.readouts{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,190px),1fr));gap:1px;background:var(--rule);border:1px solid var(--rule);margin:14px 0}
.readouts>div{background:var(--panel);padding:10px 12px;min-width:0}
.readouts dt{font:600 10px/1.5 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.readouts dd{margin:4px 0 0;font:14px/1.4 var(--mono);overflow-wrap:anywhere}

.control-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.control-grid>*{min-width:0}
label{display:block;font:12px/1.6 var(--mono);margin-bottom:6px}
select{font:12px/1.4 var(--mono);width:100%;max-width:100%;min-height:44px;padding:9px 10px;border:1px solid var(--rule2);border-radius:4px;background:var(--panel);color:var(--ink)}
.slider-row{margin-top:14px}
.slider-row output{font-weight:600;color:var(--seed);margin-left:6px}
input[type=range]{width:100%;accent-color:var(--seed);min-height:30px;margin:4px 0}

.table-scroll{max-width:100%;overflow-x:auto;margin:14px 0;overscroll-behavior-x:contain}
table{border-collapse:collapse;width:100%;min-width:640px;font:11.5px/1.6 var(--mono)}
caption{text-align:left;color:var(--muted);margin-bottom:8px;font-size:11.5px}
th,td{text-align:left;vertical-align:top;padding:7px 9px;border-bottom:1px solid var(--rule)}
thead th{color:var(--muted);font-weight:600;font-size:10.5px;letter-spacing:.04em}
tbody th{font-weight:600}
tr.selected{background:rgba(154,79,35,.1)}
td.flag{color:var(--red);font-weight:700}

.sweep-bar{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;margin:10px 0}
.sweep-bar>*{min-width:0}
.table-note{margin:16px 0 -6px}
.osl-panel{border-top:1px dashed var(--osl);margin-top:26px;padding-top:4px}
.grade{display:inline-block;font:600 11.5px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--ink);padding:9px 11px;margin:0 0 16px}
.two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:18px 0}
.two-col>*{min-width:0}
.tile{padding:16px 18px;border-radius:6px;border:1px solid var(--rule2);background:var(--panel)}
.tile.good{border-left:4px solid var(--pollen)}
.tile.caution{border-left:4px solid var(--seed)}
.big-word{font:600 clamp(1.05rem,2.6vw,1.45rem)/1.3 var(--mono);letter-spacing:.02em;margin:4px 0 10px}
.tile.good .big-word{color:var(--pollen)}.tile.caution .big-word{color:var(--seed)}
.premises{max-width:48rem;padding-left:20px}
.premises li{margin-bottom:10px}

.check{border:1px solid var(--pollen);border-radius:6px;padding:24px 24px 18px;background:var(--paper2)}
.check h2{color:var(--pollen)}
.checks{display:grid;grid-template-columns:170px minmax(0,1fr);gap:12px 20px;margin:0 0 16px}
.checks dt{font:600 11px/1.8 var(--mono);color:var(--pollen);letter-spacing:.04em}
.checks dd{margin:0;font-size:.95rem;min-width:0}
.formula{font:12px/1.9 var(--mono);background:#ebe5d4;padding:10px 12px;border-radius:4px;overflow-wrap:anywhere}
details{border-top:1px solid var(--rule);padding:12px 0}
summary{cursor:pointer;font-size:1.02rem}
summary:focus-visible{outline-offset:2px}

.timeline{list-style:none;padding:0;margin:20px 0 26px;max-width:52rem}
.timeline li{display:grid;grid-template-columns:130px minmax(0,1fr);column-gap:16px;padding:10px 0;border-bottom:1px solid var(--rule)}
.timeline li>*{min-width:0}
.timeline .when{font:600 11.5px/1.7 var(--mono);grid-row:span 3}
.timeline .who{font:600 10px/1.6 var(--mono);letter-spacing:.1em;text-transform:uppercase}
.timeline p{margin:2px 0}
.timeline a{font:11px/1.6 var(--mono)}
.who.claim,.who.support{color:var(--seed)}.who.objection{color:var(--red)}.who.reply{color:var(--muted)}.who.control{color:var(--pollen)}
.verdict{border:1px solid var(--ink);border-radius:6px;padding:22px 24px;margin:26px 0;background:var(--panel)}
.verdict-word{font:600 2.4rem/1.1 var(--mono);letter-spacing:.06em;margin:4px 0 12px}
.refs{padding-left:22px;font:11.5px/1.75 var(--mono);overflow-wrap:anywhere;max-width:60rem}
.refs li{margin-bottom:12px}
.related{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 26px;margin:60px 0 30px;border-top:1px solid var(--ink);padding-top:22px}
.related>div{min-width:0}
.related a{font-size:1.1rem}
.related p{font-size:.9rem;color:var(--muted);margin-top:6px}
footer{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font:11px/1.8 var(--mono);border-top:1px solid var(--ink);padding-top:14px}
footer a{color:var(--ink)}
.noscript{border:1px solid var(--red);padding:12px;color:var(--red)}
[hidden]{display:none!important}

/* SVG marks */
svg text{font-family:var(--mono);fill:var(--ink)}
.tick{font-size:10px;fill:var(--muted)}
.grid{stroke:var(--rule);stroke-width:1}
.zero{stroke:var(--ink);stroke-width:1}
.band{fill:rgba(31,107,94,.1)}
.lgm{fill:var(--ice)}
.lgm-soft{fill:var(--ice2)}
.lgm-label{font-size:9.5px;fill:#46607a;letter-spacing:.06em}
.column{fill:#e7dcc2;stroke:#b8aa89;stroke-width:1}
.lamina{stroke:#d6c8a8;stroke-width:1}
.horizon{stroke:#6e604a;stroke-width:1.4;stroke-dasharray:3 2}
.th{font-size:9px;fill:#6e604a}
.coltitle,.coltick{font-size:9px;fill:var(--muted)}
.osl-level{fill:rgba(107,91,149,.22);stroke:var(--osl);stroke-dasharray:2 2}
.leader{fill:none;stroke:#b3aa95;stroke-width:1}
.seed-dot{fill:var(--seed)}.pollen-dot{fill:var(--pollen)}
.rowlabel{font-size:10.5px}
.narrow .rowlabel{font-size:9.5px}
.rowsub{font-size:8.5px;fill:var(--muted)}
.seed-text{fill:var(--seed)}.pollen-text{fill:var(--pollen)}.osl-text{fill:var(--osl)}
.seed-ridge{fill:var(--seed-soft);stroke:var(--seed);stroke-width:1.2}
.pollen-ridge{fill:var(--pollen-soft);stroke:var(--pollen);stroke-width:1.2}
.approx-ridge{fill:rgba(199,119,18,.18);stroke:var(--approx);stroke-width:1.4;stroke-dasharray:5 3}
.ghost{fill:none;stroke:var(--faint);stroke-width:1;stroke-dasharray:3 3;opacity:.8}
.ghost-dash{fill:none;stroke:var(--faint);stroke-width:1;stroke-dasharray:5 3;opacity:.75}
.seed-hpd{stroke:var(--seed);stroke-width:3.2;stroke-linecap:round}
.seed-hpd-mid{stroke:var(--ink);stroke-width:1.4}
.pollen-hpd{stroke:var(--pollen);stroke-width:3.2;stroke-linecap:round}
.pollen-hpd-mid{stroke:var(--ink);stroke-width:1.4}
.approx-hpd{stroke:var(--approx);stroke-width:3.2;stroke-linecap:round}
.approx-hpd-mid{stroke:var(--ink);stroke-width:1.4}
.osl-bar{stroke:var(--osl);stroke-width:1.2}
.osl-arrow{stroke:var(--osl);stroke-width:1.6}
.osl-head{fill:var(--osl)}
.osl-dot{fill:var(--osl)}
.gap{fill:none;stroke:var(--red);stroke-width:1.4}
.gaplabel{font-size:11px;fill:var(--red);font-weight:600}
.axiscap{font-size:10px;fill:var(--muted)}
.minor{stroke:var(--faint);stroke-width:1.4}
.stat{fill:var(--seed);stroke:#fff;stroke-width:1}
.stat.out{fill:var(--red)}
.bar{stroke-width:7;stroke-linecap:butt}
.cap{stroke-width:1.4}
.bar.claim,.cap.claim{stroke:var(--ink)}
.bar.seed,.cap.seed{stroke:var(--seed)}
.bar.pollen,.cap.pollen{stroke:var(--pollen)}
.bar.moved,.cap.moved{stroke:var(--seed);stroke-dasharray:4 2;opacity:.8}
.barlabel{font-size:10px}
.published{fill:none;stroke:var(--ink);stroke-width:1.2}
.sweep{fill:none;stroke:#9fb9ae;stroke-width:1.2}
.sweep-selected{fill:none;stroke:var(--seed);stroke-width:2.6}
.first{fill:#9fb9ae}.first-selected{fill:var(--seed)}
.other-hpd{stroke:var(--faint);stroke-width:1.6;stroke-dasharray:3 2}
.other-mid{stroke:var(--faint);stroke-width:1.4}
.cursor{stroke:var(--osl);stroke-width:1.2;stroke-dasharray:4 3}

@media (max-width:760px){
  body{font-size:17px}
  main{padding:16px 16px 60px}
  .anchor-grid,.two-col,.control-grid,.related{grid-template-columns:minmax(0,1fr)}
  .checks{grid-template-columns:minmax(0,1fr);gap:4px}
  .checks dd{margin-bottom:12px}
  .instrument,.check,.verdict{padding:14px}
  .timeline li{grid-template-columns:minmax(0,1fr)}
  .timeline .when{grid-row:auto}
  .toolbar button{flex:1 1 140px}
  .claim-quote p{font-size:1.16rem}
  section{margin-top:54px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}