:root{
    color-scheme: light;
    --paper:#FCFCFD; --card:#FFFFFF; --sunk:#F3F4F7;
    --ink:#14171C; --ink-2:#4E555F; --ink-3:#828A94;
    --rule:#E1E4E9; --rule-firm:#C4C9D1;
    --accent:#5F7017; --accent-ink:#4B5A12;
    --hot:#5F7017; --hot-soft:#EBEFDC;
    --cold:#3D5665; --cold-soft:#E4EBEF;
    --measure:66ch;
  }
  @media (prefers-color-scheme: dark){
    :root:not([data-theme="light"]){
      color-scheme: dark;
      --paper:#0F1216; --card:#151A1F; --sunk:#1A2027;
      --ink:#E7EAEE; --ink-2:#A3ABB5; --ink-3:#79818B;
      --rule:#252B33; --rule-firm:#38404A;
      --accent:#AFC454; --accent-ink:#C2D471;
      --hot:#AFC454; --hot-soft:#20270F;
      --cold:#8CAFC4; --cold-soft:#16222A;
    }
  }
  :root[data-theme="dark"]{
    color-scheme: dark;
    --paper:#0F1216; --card:#151A1F; --sunk:#1A2027;
    --ink:#E7EAEE; --ink-2:#A3ABB5; --ink-3:#79818B;
    --rule:#252B33; --rule-firm:#38404A;
    --accent:#AFC454; --accent-ink:#C2D471;
    --hot:#AFC454; --hot-soft:#20270F;
    --cold:#8CAFC4; --cold-soft:#16222A;
  }

  *{box-sizing:border-box}
  body{
    margin:0;background:var(--paper);color:var(--ink);
    font-family:"Source Serif 4",Georgia,"Times New Roman",serif;
    font-size:17.5px;line-height:1.6;font-weight:380;
    -webkit-font-smoothing:antialiased;
    font-variant-numeric:oldstyle-nums;
  }
  .paper{max-width:74rem;margin:0 auto;padding:0 clamp(1.1rem,4vw,3rem) 7rem}

  /* ---- title block ---- */
  .title{padding:clamp(3rem,9vw,6.5rem) 0 2.2rem;border-bottom:1px solid var(--ink)}
  .title h1{
    font-size:clamp(2.1rem,5.4vw,3.2rem);font-weight:600;line-height:1.05;
    letter-spacing:-.02em;margin:0 0 .7rem;max-width:20ch;text-wrap:balance;
    font-variant-numeric:lining-nums;
  }
  .title .strap{
    font-size:clamp(1.05rem,2.3vw,1.28rem);color:var(--ink-2);font-weight:300;
    max-width:58ch;margin:0 0 1.6rem;line-height:1.45;
  }
  .byline{
    display:flex;flex-wrap:wrap;gap:.4rem 2rem;
    font-family:"IBM Plex Mono",ui-monospace,monospace;
    font-size:.68rem;letter-spacing:.11em;text-transform:uppercase;color:var(--ink-3);
  }
  .byline a{color:inherit}

  /* ---- abstract ---- */
  .abstract{
    margin-top:2.4rem;padding:1.4rem 1.6rem;background:var(--sunk);
    border-left:2px solid var(--accent);
  }
  .abstract h2{
    font-family:"IBM Plex Mono",ui-monospace,monospace;
    font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;
    color:var(--ink-3);margin:0 0 .8rem;font-weight:500;
  }
  .abstract p{font-size:1.02rem;line-height:1.6;color:var(--ink-2);max-width:70ch}
  .abstract p + p{margin-top:.8rem}

  /* ---- sections ---- */
  section{
    display:grid;grid-template-columns:minmax(0,1fr);gap:.9rem;
    padding:3rem 0 .4rem;
  }
  @media (min-width:64rem){
    section{grid-template-columns:4.5rem minmax(0,var(--measure));gap:0 3.2rem}
  }
  .num{
    font-family:"IBM Plex Mono",ui-monospace,monospace;
    font-size:.78rem;color:var(--ink-3);padding-top:.55rem;
    font-variant-numeric:lining-nums;
  }
  .body > * + *{margin-top:1.05em}
  .body > h2{margin-top:0}

  h2{
    font-size:clamp(1.35rem,2.9vw,1.72rem);font-weight:600;line-height:1.18;
    letter-spacing:-.014em;margin:0 0 1rem;text-wrap:balance;
  }
  h3{
    font-size:1.06rem;font-weight:600;margin:2.1rem 0 .5rem;letter-spacing:-.004em;
  }
  h3 .sub{
    font-family:"IBM Plex Mono",ui-monospace,monospace;font-weight:400;
    font-size:.7rem;letter-spacing:.09em;color:var(--ink-3);margin-right:.6rem;
    font-variant-numeric:lining-nums;
  }
  p{margin:0}
  strong{font-weight:600}
  em{font-style:italic}
  a{color:var(--accent-ink);text-decoration:underline;text-decoration-color:var(--rule-firm);text-underline-offset:.16em}
  a:hover{text-decoration-color:currentColor}
  a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
  code,.mono{
    font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:.85em;
    font-variant-numeric:lining-nums;
  }
  sup a{text-decoration:none;font-size:.72em;padding:0 .1em;font-variant-numeric:lining-nums}

  /* ---- figures ---- */
  figure{margin:1.8rem 0 0;padding:0}
  figcaption{
    font-family:"IBM Plex Mono",ui-monospace,monospace;
    font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;
    color:var(--ink-3);margin-bottom:.7rem;
  }
  .fig-note{font-size:.86rem;color:var(--ink-3);margin-top:.7rem;line-height:1.5}

  .tiers{border:1px solid var(--rule-firm);background:var(--card)}
  .tier-row{display:grid;grid-template-columns:minmax(0,1fr);border-bottom:1px solid var(--rule)}
  @media (min-width:40rem){.tier-row{grid-template-columns:9.5rem minmax(0,1fr)}}
  .tier-row:last-child{border-bottom:0}
  .tier-label{
    padding:1rem 1.1rem;font-family:"IBM Plex Mono",ui-monospace,monospace;
    font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
    border-right:1px solid var(--rule);
  }
  .tier-row.hot .tier-label{color:var(--hot);background:var(--hot-soft)}
  .tier-row.cold .tier-label{color:var(--cold);background:var(--cold-soft)}
  .tier-body{padding:1rem 1.15rem;font-size:.94rem;color:var(--ink-2);line-height:1.55}
  .tier-body b{color:var(--ink);font-weight:600;display:block;margin-bottom:.25rem;font-size:1rem}
  .tier-figure{
    font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:.78rem;
    color:var(--ink-3);margin-top:.5rem;display:block;
    font-variant-numeric:lining-nums;
  }

  /* ---- tables ---- */
  .scroll{overflow-x:auto;border:1px solid var(--rule-firm);margin-top:1.5rem}
  table{border-collapse:collapse;width:100%;min-width:34rem;font-size:.9rem;background:var(--card)}
  caption{
    caption-side:top;text-align:left;padding:.8rem 1rem;background:var(--sunk);
    border-bottom:1px solid var(--rule-firm);
    font-family:"IBM Plex Mono",ui-monospace,monospace;
    font-size:.64rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);
  }
  th,td{text-align:left;padding:.55rem .9rem;border-bottom:1px solid var(--rule);vertical-align:top}
  thead th{
    font-family:"IBM Plex Mono",ui-monospace,monospace;font-weight:500;
    font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);
    white-space:nowrap;
  }
  tbody tr:last-child td{border-bottom:0}
  td.n,th.n{font-family:"IBM Plex Mono",ui-monospace,monospace;font-variant-numeric:tabular-nums lining-nums;white-space:nowrap;text-align:right}
  tr.us td{background:var(--hot-soft)}

  /* ---- pull statement ---- */
  .claim{
    border-left:2px solid var(--accent);padding:.2rem 0 .2rem 1.3rem;
    font-size:1.12rem;line-height:1.45;color:var(--ink);
  }

  /* ---- parameter block ---- */
  .params{
    margin-top:1.5rem;border:1px solid var(--rule-firm);background:var(--card);
    font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:.8rem;
    font-variant-numeric:lining-nums;
  }
  .params div{
    display:grid;grid-template-columns:minmax(0,1fr) auto;gap:1rem;
    padding:.45rem .95rem;border-bottom:1px solid var(--rule);
  }
  .params div:last-child{border-bottom:0}
  .params .k{color:var(--ink-2)}
  .params .v{color:var(--ink);white-space:nowrap}

  /* ---- references ---- */
  ol.refs{list-style:none;counter-reset:r;padding:0;margin:1.3rem 0 0;display:grid;gap:.75rem}
  ol.refs li{
    counter-increment:r;display:grid;grid-template-columns:2rem minmax(0,1fr);
    gap:.8rem;font-size:.9rem;line-height:1.5;color:var(--ink-2);
  }
  ol.refs li::before{
    content:"[" counter(r) "]";
    font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:.72rem;
    color:var(--ink-3);padding-top:.2rem;font-variant-numeric:lining-nums;
  }

  footer{
    margin-top:3.5rem;padding-top:1.3rem;border-top:1px solid var(--ink);
    display:flex;flex-wrap:wrap;gap:.4rem 2rem;
    font-family:"IBM Plex Mono",ui-monospace,monospace;
    font-size:.64rem;letter-spacing:.11em;text-transform:uppercase;color:var(--ink-3);
  }
  @media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}