/* Jamming Physics — Aging & Senescence volume
   Canonical site stylesheet (VP-SPEC v1.8). Deterministic, static, no external fonts.
   Design: a scientific monograph about defended setpoints that hold, drift, then cross a
   threshold. Ink on warm paper; deep-teal structure; a functional evidence-grade scale
   (verified / forced / open) because grading is the framework's load-bearing claim. */

:root{
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  --paper-2:#fbfaf5;        /* raised panel */
  --ink:#191b1d;            /* near-black body ink */
  --ink-soft:#4c5258;       /* secondary text */
  --ink-faint:#7c8389;      /* captions, meta */
  --rule:#dcd6c8;           /* hairline rule */
  --rule-soft:#e8e3d7;
  --accent:#0f6b67;         /* deep teal: links, structure */
  --accent-deep:#0a4744;
  --accent-wash:#e7efed;    /* teal tint for answer panel */
  --verified:#1f6b3b;       /* [V] measured/derived */
  --forced:#0f6b67;         /* [F] forced by geometry */
  --open:#9a5b00;           /* [O] open / not reproducible in-package */
  --open-wash:#f5ece0;
  --crimson:#9e2b2b;        /* catastrophic crossing accent */
  --maxw:46rem;
  --font-body:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua",Georgia,serif;
  --font-ui:"Inter","Helvetica Neue",Arial,system-ui,sans-serif;
  --font-mono:"SFMono-Regular",ui-monospace,"JetBrains Mono","Menlo",Consolas,monospace;
}

*{box-sizing:border-box}
html{font-size:18px;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--font-body);line-height:1.62;
  text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;
}

/* ---- skeleton ---- */
header,main,footer{max-width:var(--maxw);margin-inline:auto;padding-inline:1.25rem}
header{padding-top:1.4rem}
main{padding-bottom:3rem}

nav.crumb{font-family:var(--font-ui);font-size:.78rem;letter-spacing:.02em;color:var(--ink-faint)}
nav.crumb a{color:var(--accent);text-decoration:none}
nav.crumb a:hover{text-decoration:underline}

/* ---- type scale ---- */
h1{
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}
h2{
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}
h3{font-family:var(--font-ui);font-weight:600;font-size:1.0rem;margin:1.5rem 0 .35rem;color:var(--ink)}
p{margin:.65rem 0}
a{color:var(--accent-deep)}
strong,b{font-weight:650}

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/* ---- answer-first panel (signature element) ---- */
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}
p.answer::before{
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  text-transform:uppercase;color:var(--accent);margin-bottom:.3rem;
}
p.abstract{font-size:1.02rem;color:var(--ink-soft)}

/* ---- claim strip ---- */
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  border:1px solid var(--rule);border-radius:4px;background:var(--paper-2);
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}
aside.claim-strip a{color:var(--accent-deep);text-decoration:none;border-bottom:1px solid var(--rule)}
aside.claim-strip a:hover{border-bottom-color:var(--accent)}
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/* ---- grade pills ---- */
.grade{
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}
.g-verified{background:#e3f0e7;color:var(--verified);border:1px solid #bcd9c4}
.g-forced{background:#e1efee;color:var(--forced);border:1px solid #b6d6d3}
.g-open{background:#f6ecdc;color:var(--open);border:1px solid #e4cda3}

/* ---- vp-card (self-contained locked-quantity chip) ---- */
aside.vp-card{
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}
aside.vp-card b{color:var(--ink);font-family:var(--font-mono);font-size:.85rem}
aside.vp-card a{color:var(--accent-deep)}

/* ---- tables ---- */
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table{border-collapse:collapse;width:100%;font-family:var(--font-ui);font-size:.82rem}
caption{font-family:var(--font-ui);font-size:.76rem;color:var(--ink-faint);text-align:left;margin-bottom:.4rem}
th,td{padding:.36rem .55rem;text-align:right;border-bottom:1px solid var(--rule-soft);font-variant-numeric:tabular-nums}
th:first-child,td:first-child{text-align:left}
thead th{border-bottom:1.5px solid var(--rule);font-weight:650;color:var(--ink)}
tbody tr:hover{background:#efeada}
td.num{font-family:var(--font-mono);font-size:.78rem}
.muted{color:var(--ink-faint)}
.flip{color:var(--crimson);font-weight:600}

/* ---- lists ---- */
ul,ol{padding-left:1.2rem}
li{margin:.3rem 0}
ul.tight li{margin:.15rem 0}

/* ---- key figure callout (text equation) ---- */
.kf{
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/* ---- prev/next ---- */
nav.pn{
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nav.pn a{color:var(--accent-deep);text-decoration:none}
nav.pn a:hover{text-decoration:underline}
nav.pn .mid{color:var(--ink-faint)}

/* ---- footer ---- */
footer{
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}
footer a{color:var(--accent-deep);text-decoration:none}

/* ---- hub ---- */
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.toc{list-style:none;padding:0;margin:1.4rem 0}
.toc li{
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.toc a:hover{color:var(--accent-deep)}
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.headline-results span{display:inline-block;margin-right:1.1rem;white-space:nowrap}

/* ---- accessibility / motion / responsive ---- */
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (max-width:480px){
  html{font-size:16.5px}
  h1{font-size:1.62rem}
  header,main,footer{padding-inline:1rem}
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}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
@media (prefers-color-scheme:dark){
  :root{
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