/* THEME: notebook — the lab notebook. Everything monospace, sections numbered §1 §2 §3 by CSS
   counters, dashed plotter frames, boxed stamps instead of pills. Reads like a working record
   rather than a publication, which is honest: these are drawn in code and the code is the artefact. */

:root{
  --paper:#FFFFFF; --ink:#0A0A0A; --muted:#6E6E6E; --rule:#D8D8D8;
  --accent:#1A3FD0; --stamp:#B00020; --fig-bg:#FAFAFA; --ok:#14603A;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,monospace;
  --measure:46rem;
}
@media (prefers-color-scheme:dark){
  :root{--paper:#0F1110;--ink:#E8E8E8;--muted:#8A8A8A;--rule:#2A2D2B;
        --accent:#7FA8FF;--stamp:#FF6B7A;--fig-bg:#141716;--ok:#5FD39A}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);
  font:15.5px/1.75 var(--mono);padding:0 1.15rem 5rem;
  font-variant-ligatures:none;text-rendering:optimizeLegibility}
main,header.nav,footer.foot{max-width:var(--measure);margin:0 auto}
a{color:var(--accent);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:2px}

/* the record has a spine down its left edge */
main{border-left:1px solid var(--rule);padding-left:1.4rem;counter-reset:sec}
h1{font:600 1.95rem/1.24 var(--mono);letter-spacing:-.03em;margin:.4rem 0 1.2rem}
h2{font:600 .92rem/1.4 var(--mono);text-transform:uppercase;letter-spacing:.1em;
  margin:2.5rem 0 .6rem}
h2::before{counter-increment:sec;content:"§" counter(sec);color:var(--accent);
  margin-right:.55rem;font-weight:600}
p{margin:0 0 1.05rem}
.lead{border-left:3px solid var(--accent);padding:.1rem 0 .1rem 1rem;margin-left:-1.5rem;
  padding-left:1.5rem;font-size:15.5px}

header.nav{display:flex;justify-content:space-between;align-items:baseline;
  padding:1.5rem 0 .8rem;margin-bottom:2.4rem;border-bottom:3px double var(--ink)}
header.nav .wordmark{font:700 13px/1 var(--mono);letter-spacing:.24em;text-transform:uppercase}
header.nav .wordmark a{color:var(--ink);text-decoration:none}
header.nav nav a{font:13px/1 var(--mono);color:var(--muted);text-decoration:none;margin-left:1.1rem}
header.nav nav a:hover{color:var(--accent)}
.kicker{font:600 11.5px/1 var(--mono);letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted);display:flex;gap:.6rem;flex-wrap:wrap}
.kicker .n{color:var(--stamp)}

figure.wide{margin:2rem 0}
@media(min-width:56rem){figure.wide{margin-right:-3rem}}
.frame{background:var(--fig-bg);border:1px dashed var(--rule);border-radius:0;padding:.7rem}
figure svg,figure video{display:block;width:100%;height:auto}
figcaption{font:12px/1.65 var(--mono);color:var(--muted);margin-top:.7rem;padding-top:.6rem;
  border-top:1px dotted var(--rule);text-transform:none}
figcaption b{color:var(--stamp);font-weight:600;text-transform:uppercase;letter-spacing:.08em}
/* The interactive header sits ABOVE the tool, never below it. Labelled as "Fig. N" underneath,
   readers take the widget for a static picture and scroll past the thing they came for. */
.tool{display:flex;gap:.55rem;align-items:baseline;flex-wrap:wrap;
  font:12px/1.5 var(--mono);color:var(--ink);margin:0 0 .6rem}
.tool .tag{font:600 10px/1 var(--mono);letter-spacing:.09em;text-transform:uppercase;
  color:var(--stamp);border:1px solid var(--stamp);padding:.24rem .4rem;white-space:nowrap}
.controls{display:flex;align-items:center;gap:.6rem;margin-top:.7rem;font:12px/1 var(--mono);
  flex-wrap:wrap;color:var(--muted)}
.controls button{font:600 12px/1 var(--mono);padding:.4rem .65rem;border-radius:0;
  border:1px solid var(--ink);background:transparent;color:var(--ink);cursor:pointer}
.controls button:hover{background:var(--accent);border-color:var(--accent);color:var(--paper)}
.controls input[type=range]{flex:1;accent-color:var(--accent);min-width:6rem;height:1.1rem}
.readout{white-space:nowrap;font-variant-numeric:tabular-nums}
@media(prefers-reduced-motion:reduce){.controls{opacity:.55}}
@media(max-width:30rem){
  body{font-size:14px;padding-left:1rem;padding-right:1rem}
  main{padding-left:1rem}
  h1{font-size:1.6rem}
  .readout{flex:1 1 100%;white-space:normal;overflow-wrap:anywhere}
}

/* references as a stamped record block */
.paper{margin:3rem 0 0;border:1px solid var(--ink);padding:1rem 1.1rem;background:transparent}
.paper h2{margin:0 0 .8rem;font-size:.8rem;letter-spacing:.16em}
.paper h2::before{content:none}
.paper ol{margin:0;padding-left:1.4rem;font-size:.92rem;line-height:1.65}
.paper li{margin-bottom:.95rem}
.paper li:last-child{margin-bottom:0}
.paper .t{font-weight:600}
.paper a{overflow-wrap:anywhere}
.paper .meta{color:var(--muted)}
.badge{display:inline-block;font:600 10px/1 var(--mono);letter-spacing:.09em;text-transform:uppercase;
  padding:.24rem .4rem;border-radius:0;border:1px solid var(--muted);margin-left:.4rem;
  vertical-align:1.5px;white-space:nowrap;color:var(--muted)}
/* was hard-coded #14603A — 2.48:1 on the dark paper, effectively invisible in dark mode */
.b-yes{border-color:var(--ok);color:var(--ok)}
.pager{display:flex;justify-content:space-between;gap:1rem;margin:2.8rem 0 0;
  padding-top:1rem;border-top:1px solid var(--rule);font:13px/1.4 var(--mono)}
.pager a{text-decoration:none}
.pager .lbl{display:block;color:var(--muted);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;margin-bottom:.3rem}
nav.parts{display:flex;align-items:baseline;gap:.5rem;max-width:var(--measure);margin:.2rem auto 0;
  font:600 12px/1 var(--mono)}
nav.parts .lbl{font:600 11px/1 var(--mono);letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
nav.parts a{display:inline-block;min-width:1.6rem;text-align:center;padding:.3rem;border-radius:0;
  border:1px solid var(--rule);color:var(--muted);text-decoration:none}
nav.parts a[aria-current]{border-color:var(--stamp);color:var(--stamp)}
footer.foot{margin-top:3.4rem;padding-top:1rem;border-top:1px solid var(--rule);
  font:12px/1.8 var(--mono);color:var(--muted)}

ol.index{list-style:none;margin:1.6rem 0 0;padding:0}
/* the four STEM buckets on the landing page */
h3.cat{font:600 12px/1 var(--mono);letter-spacing:.16em;text-transform:uppercase;
  margin:2.1rem 0 .2rem;color:var(--ink)}
h3.cat .count{color:var(--muted);letter-spacing:0;font-weight:400}
.search button{font:600 12px/1 var(--mono);padding:.45rem .85rem;border:1px solid var(--ink);
  background:transparent;color:var(--ink);cursor:pointer;border-radius:0}
.search button:hover{background:var(--accent);border-color:var(--accent);color:var(--paper)}
ol.index li{border-bottom:1px dotted var(--rule);padding:.9rem 0;display:flex;gap:1rem;align-items:baseline}
ol.index .n{font:12px/1.6 var(--mono);color:var(--muted);min-width:3.1rem}
ol.index a{font-size:1.02rem;text-decoration:none;line-height:1.4;font-weight:600}
ol.index a:hover{text-decoration:underline}
ol.index .sub{display:block;font:12px/1.6 var(--mono);color:var(--muted);margin-top:.3rem}
ol.index .now{font:600 10px/1 var(--mono);letter-spacing:.09em;text-transform:uppercase;
  color:var(--stamp);border:1px solid var(--stamp);padding:.24rem .4rem;white-space:nowrap;
  margin-left:.5rem;vertical-align:1.5px}

/* index page: search box, published blurbs, and the unwritten queue */
.search{display:flex;align-items:center;gap:.7rem;flex-wrap:wrap;margin:1.5rem 0 2.2rem;
  padding:.7rem .85rem;border:1px solid var(--rule);background:var(--fig-bg)}
.search label{font:600 11px/1 var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
.search input{flex:1 1 15rem;min-width:0;font:13.5px/1.3 var(--mono);color:var(--ink);
  background:var(--paper);border:1px solid var(--rule);border-radius:0;padding:.45rem .6rem}
.search input:focus{outline:2px solid var(--accent);outline-offset:1px}
.search .sub{font:11px/1 var(--mono);color:var(--muted);font-variant-numeric:tabular-nums}

/* a published entry carries its own summary, so the list reads without clicking through */
ol.index .blurb{display:block;font-size:.9rem;line-height:1.62;color:var(--muted);
  margin-top:.35rem;max-width:var(--measure)}

ul.queue{list-style:none;margin:1.4rem 0 0;padding:0}
ul.queue li{display:flex;gap:1rem;align-items:baseline;padding:.8rem 0;
  border-bottom:1px dotted var(--rule)}
ul.queue li:last-child{border-bottom:0}
ul.queue .n{font:12px/1.6 var(--mono);color:var(--rule);min-width:3.1rem;text-align:center}
ul.queue .sub{display:block;font:12px/1.6 var(--mono);color:var(--muted);margin-top:.3rem}
ul.queue .blurb{display:block;font-size:.9rem;line-height:1.62;color:var(--muted);
  margin-top:.35rem;max-width:var(--measure)}

/* ol.index li is display:flex, which beats the plain hidden attribute — the filter needs this */
[hidden]{display:none!important}


/* ── manual theme override ──────────────────────────────────────────────────
   The OS preference above already gives dark mode with no JS. These two rules
   add a manual switch on top, which a reviewer on a light-mode machine needs in
   order to see dark at all. Same tokens, so the two paths cannot drift. */
html{color-scheme:light}
@media (prefers-color-scheme:dark){html{color-scheme:dark}}
html[data-theme="light"]{--paper:#FFFFFF;--ink:#0A0A0A;--muted:#6E6E6E;--rule:#D8D8D8;
  --accent:#1A3FD0;--stamp:#B00020;--fig-bg:#FAFAFA;--ok:#14603A;color-scheme:light}
html[data-theme="dark"]{--paper:#0F1110;--ink:#E8E8E8;--muted:#8A8A8A;--rule:#2A2D2B;
  --accent:#7FA8FF;--stamp:#FF6B7A;--fig-bg:#141716;--ok:#5FD39A;color-scheme:dark}

/* ── brand ──────────────────────────────────────────────────────────────────
   Mike, 2026-09-28: "Now Obvious is very small on the page". It was a 13px
   letterspaced label. It is the name of the thing; it should be the loudest
   element on the page. */
header.nav{padding:1.9rem 0 .9rem}
header.nav .wordmark{font:700 clamp(1.3rem,3.2vw,1.6rem)/1 var(--mono);
  letter-spacing:-.035em;text-transform:none}
header.nav .wordmark a{display:inline-flex;align-items:center;gap:.45rem}
header.nav .wordmark svg{width:1.12em;height:1.12em;flex:none;vertical-align:0}
header.nav nav{display:flex;align-items:center;gap:1.1rem;flex-wrap:wrap}
header.nav nav a{margin-left:0;font-size:12.5px;letter-spacing:.06em}
.tgl{font:600 11px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;
  background:transparent;border:1px solid var(--rule);color:var(--muted);
  padding:.42rem .58rem;cursor:pointer;border-radius:0}
.tgl:hover{border-color:var(--ink);color:var(--ink)}

/* ── the standing explanation of the site, set apart ─────────────────────── */
.callout{border:1px solid var(--ink);border-left:4px solid var(--accent);
  background:var(--fig-bg);padding:1rem 1.15rem;margin:0 0 2.1rem}
.callout .lbl{display:block;font:600 11px/1 var(--mono);letter-spacing:.16em;
  text-transform:uppercase;color:var(--muted);margin-bottom:.55rem}
.callout p{margin:0;font-size:1.02rem;line-height:1.62}

/* ── index: recent per field, as cards ───────────────────────────────────── */
.rail{margin:2.1rem 0 0}
.rail .rhd{display:flex;justify-content:space-between;align-items:baseline;
  border-bottom:1px solid var(--ink);padding-bottom:.4rem}
/* auto-fit with 1fr stretched a lone card across the whole row — Science and Technology have
   one piece each and looked broken next to Math's three. Capped tracks fix it. */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(13.5rem,20rem));
  justify-content:start;gap:.85rem;margin-top:.95rem}
@media(max-width:34rem){.cards{grid-template-columns:1fr}}
.card{display:block;text-decoration:none;color:inherit;border:1px dashed var(--rule);
  background:var(--fig-bg);padding:.85rem .95rem}
.card:hover{border-color:var(--accent)}
.card .k{font:600 10.5px/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;
  color:var(--muted)}
.card .t{font-weight:600;font-size:.98rem;line-height:1.34;margin:.45rem 0 .3rem;color:var(--ink)}
.card .b{font-size:.82rem;line-height:1.55;color:var(--muted)}

/* ── explainers: one dense list, filtered in place ───────────────────────── */
.chips{display:flex;gap:.5rem;flex-wrap:wrap;margin:1.4rem 0 0}
.chip{font:600 11px/1 var(--mono);letter-spacing:.09em;text-transform:uppercase;
  padding:.42rem .62rem;border:1px solid var(--rule);background:var(--paper);
  color:var(--muted);cursor:pointer;border-radius:0}
.chip:hover{border-color:var(--ink);color:var(--ink)}
.chip[aria-pressed="true"]{border-color:var(--accent);color:var(--accent)}
table.all{width:100%;border-collapse:collapse;margin-top:1.3rem}
table.all th{text-align:left;font:600 10.5px/1 var(--mono);letter-spacing:.15em;
  text-transform:uppercase;color:var(--muted);padding:.5rem .55rem;
  border-bottom:1px solid var(--ink);white-space:nowrap}
table.all td{padding:.6rem .55rem;border-bottom:1px dotted var(--rule);
  vertical-align:baseline;font-size:.92rem}
table.all tr:hover td{background:var(--fig-bg)}
/* Column widths, measured rather than assumed: Source was landing at 302px against the title's
   206px, because a nowrap author list on an auto-layout table demands its full text width and the
   title column is the one that gives. Fix is both halves — pin the narrow columns, let authors wrap. */
table.all th:nth-child(1),table.all td:nth-child(1){width:3.2rem}
table.all th:nth-child(2),table.all td:nth-child(2){width:100%}
table.all th:nth-child(3),table.all td:nth-child(3){width:6rem}
table.all th:nth-child(4),table.all td:nth-child(4){width:10rem;white-space:normal;line-height:1.4}
table.all th:nth-child(5),table.all td:nth-child(5){width:3.4rem}
table.all .num{font-size:.82rem;color:var(--muted);white-space:nowrap;
  font-variant-numeric:tabular-nums}
table.all .cn{display:block;font-size:.78rem;color:var(--muted);margin-top:.15rem}
table.all .empty{padding:1.2rem .55rem;color:var(--muted);font-size:.88rem}
@media(max-width:44rem){table.all .opt{display:none}}

/* ── prose pages: about, contact, privacy, terms ─────────────────────────── */
.prose h2{margin-top:2.2rem}
.prose .meta{font-size:.86rem;color:var(--muted)}
footer.foot a{color:var(--muted);text-decoration:none;margin-right:1.1rem}
footer.foot a:hover{color:var(--accent)}
footer.foot .frow{margin-top:.5rem}

@media print{
  :root{--paper:#fff;--ink:#000;--muted:#444;--rule:#bbb;--accent:#000;--stamp:#000;--fig-bg:#fff}
  body{font-size:10.5pt}
  header.nav nav,.controls,.pager,.search,.tgl,.chips{display:none}
}