/* manual-common.css
   Shared component system for the long-form manuals (AI Operator's Manual,
   Context Engineering Manual). Extracted verbatim from operator/index.html's
   inline <style> in Phase 1 of BUILD-SPEC.md.

   Loaded AFTER site-common.css and carries the same cascade position the
   inline <style> held, so selector order and specificity are unchanged.

   Three deliberate differences from the extracted original:
     - heading selectors are tag-agnostic, .m-head/.partbar :is(h2,h3)
     - chrome geometry is derived from --topbar-h / --levelbar-h, not repeated
     - --topbar-sub dark value is #a7a39b, the colour that actually rendered;
       the declared #92908B was always overridden by site-common.css
*/
  :root{
    --paper:#F6F2E9; --paper-2:#EFE9DB; --stripe:#F3EEE2; --panel:#FFFDF8;
    --ink:#211C15; --ink-soft:#5C5346; --ink-faint:#70685D;
    --line:#DAD1C0; --line-strong:#C4B8A2;
    --accent:#186B62; --accent-ink:#0F4E46; --accent-tint:#E5EFEC; --accent-on-dark:#84CFC4;
    --caution:#8A5A12; --caution-tint:#F5E9D1; --caution-line:#E3D0A4;
    --bad-ink:#A6403A; --bad-bg:#F7E9E7;
    --topbar-bg:#211C15; --topbar-ink:#F1EADB; --topbar-sub:#B9AE99;
    --th-bg:#211C15; --th-ink:#EEE7D7;
    --shadow:0 1px 2px rgba(33,28,21,.03);
    --rail:264px;
    --site-nav-height:76px;
    /* chrome geometry: one chain, derived not repeated.
       site nav (76) + topbar (54) = level bar top (130)
       + level bar (46) = content offset (176); +2px progress bar = scroll-margin (178) */
    --topbar-h:54px;
    --levelbar-h:46px;
    --chrome-h:calc(var(--site-nav-height) + var(--topbar-h) + var(--levelbar-h));
    --text-primary:var(--ink); --text-secondary:var(--ink-soft); --text-muted:var(--ink-faint); --text-accent:var(--accent-ink);
  }
  html[data-theme="dark"]{
    --paper:#0C1523; --paper-2:#132039; --stripe:#132039; --panel:#132039;
    --ink:#E7DFCD; --ink-soft:#A7A39B; --ink-faint:#8A8984;
    --line:#202732; --line-strong:#1D304F;
    --accent:#E9A548; --accent-ink:#E9A548; --accent-tint:#1D304F; --accent-on-dark:#E9A548;
    --caution:#E9A548; --caution-tint:#242B35; --caution-line:#755A35;
    --bad-ink:#E59089; --bad-bg:#38211F;
    --topbar-bg:#0C1523; --topbar-ink:#E7DFCD; --topbar-sub:#a7a39b;
    --th-bg:#132039; --th-ink:#E7DFCD;
    --shadow:none;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  @media (prefers-reduced-motion:reduce){html{scroll-behavior:auto;} *{transition:none !important;}}
  body{margin:0;background:var(--paper);color:var(--ink);font-family:'Karla',system-ui,sans-serif;font-size:16.5px;line-height:1.62;-webkit-font-smoothing:antialiased;}
  .site-shell{position:fixed;left:0;right:0;top:0;}
  body,.topbar,.rail,.rail a,.platform,.checkcard,.checkcard .cc-head,.spec,.spec .spec-bar,.table-wrap,table,thead th,tbody td,.caution,.ladder,.rung,.rung .lvl,.compare,.compare .txt,.compare .lab,.m-index,.readout,.readouts,.objective,.spec .copy{transition:background-color .25s ease,border-color .25s ease,color .25s ease;}

  /* manual topbar */
  .topbar{position:fixed;top:var(--site-nav-height);left:0;right:0;height:var(--topbar-h);z-index:60;background:var(--topbar-bg);color:var(--topbar-ink);display:flex;align-items:center;gap:12px;padding:0 16px;border-bottom:2px solid var(--accent);}
  .brand-mh{font-family:'Fraunces',Georgia,serif;font-weight:600;font-size:15px;line-height:1;color:var(--topbar-ink);border:1.5px solid var(--accent);border-radius:6px;padding:5px 8px;letter-spacing:.02em;}
  .topbar .mark{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.1em;text-transform:uppercase;font-weight:500;color:var(--topbar-sub);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .topbar .mark b{color:var(--topbar-ink);font-weight:600;}
  .topbar .status{margin-left:auto;display:flex;align-items:center;gap:12px;white-space:nowrap;}
  .topbar .rev{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--topbar-sub);}
  .theme-btn{background:transparent;border:1px solid rgba(255,255,255,.22);color:var(--topbar-ink);border-radius:7px;height:32px;padding:0 11px;display:inline-flex;align-items:center;gap:7px;cursor:pointer;font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;}
  .theme-btn:hover{border-color:var(--accent);}
  .theme-btn .ic{width:14px;height:14px;display:block;}
  .theme-btn .ic-moon{display:none;}
  html[data-theme="dark"] .theme-btn .ic-sun{display:none;}
  html[data-theme="dark"] .theme-btn .ic-moon{display:block;}
  .progress{position:fixed;top:var(--chrome-h);left:0;height:2px;background:var(--accent);width:0;z-index:60;transition:width .12s linear;}
  @media (prefers-reduced-motion:reduce){.progress{transition:none;}}
  .menu-btn{display:none;background:transparent;border:1px solid rgba(255,255,255,.28);color:var(--topbar-ink);border-radius:6px;width:34px;height:32px;cursor:pointer;align-items:center;justify-content:center;}
  .menu-btn span,.menu-btn span::before,.menu-btn span::after{display:block;width:16px;height:2px;background:var(--topbar-ink);position:relative;border-radius:2px;}
  .menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0;}
  .menu-btn span::before{top:-5px;} .menu-btn span::after{top:5px;}

  .shell{display:flex;max-width:1280px;margin:0 auto;padding-top:var(--chrome-h);}

  /* rail */
  .rail{width:var(--rail);flex:0 0 var(--rail);position:sticky;top:var(--chrome-h);align-self:flex-start;height:calc(100vh - var(--chrome-h));overflow-y:auto;border-right:1px solid var(--line);background:var(--paper);padding:26px 16px 60px 24px;}
  .rail .rail-label{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.16em;text-transform:lowercase;color:var(--ink-faint);margin:0 0 14px 4px;}
  .rail a{display:flex;gap:11px;align-items:baseline;text-decoration:none;color:var(--ink-soft);padding:8px 10px;border-radius:6px;margin-bottom:1px;font-size:13.5px;line-height:1.3;border-left:2px solid transparent;}
  .rail a .n{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--ink-faint);font-weight:500;min-width:20px;}
  .rail a:hover{background:var(--paper-2);color:var(--ink);}
  .rail a.active{background:var(--accent-tint);color:var(--accent-ink);border-left-color:var(--accent);font-weight:700;}
  .rail a.active .n{color:var(--accent);}

  .content{flex:1 1 auto;min-width:0;padding:0 clamp(20px,4vw,64px) 120px;}

  /* hero */
  .hero{padding:60px 0 42px;border-bottom:1px solid var(--line);}
  .hero .eyebrow{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.16em;text-transform:lowercase;color:var(--accent-ink);font-weight:500;margin-bottom:22px;display:flex;align-items:center;gap:10px;}
  .hero .eyebrow::before{content:"";width:34px;height:2px;background:var(--accent);display:inline-block;}
  .hero h1{font-family:'Fraunces',Georgia,serif;font-weight:600;font-size:clamp(2.2rem,5vw,3.7rem);line-height:1.04;letter-spacing:-.015em;margin:0 0 22px;color:var(--ink);max-width:17ch;}
  .hero h1 em{font-style:italic;color:var(--accent-ink);}
  .hero .lede{font-size:clamp(1.04rem,1.6vw,1.22rem);color:var(--ink-soft);max-width:60ch;margin:0 0 8px;}

  .readouts{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line-strong);border-top:2px solid var(--accent);border-radius:10px;overflow:hidden;margin-top:38px;}
  .readout{background:var(--panel);padding:18px 18px 20px;}
  .readout .rk{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.12em;text-transform:lowercase;color:var(--ink-faint);margin-bottom:9px;}
  .readout .rv{font-family:'Fraunces',Georgia,serif;font-weight:600;font-size:1.06rem;line-height:1.24;color:var(--ink);}
  .readout .rv b{color:var(--accent-ink);font-weight:700;}

  /* module */
  .module{padding:56px 0 8px;border-bottom:1px solid var(--line);scroll-margin-top:calc(var(--chrome-h) + 2px);}
  .module:last-of-type{border-bottom:none;}
  .m-head{margin-bottom:30px;}
  .m-index{display:inline-flex;align-items:center;gap:9px;font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:var(--accent-ink);border:1px solid var(--accent);border-radius:3px;padding:5px 12px;margin-bottom:18px;font-weight:500;background:var(--accent-tint);}
  .m-head :is(h2,h3){font-family:'Fraunces',Georgia,serif;font-weight:600;font-size:clamp(1.7rem,3vw,2.35rem);line-height:1.1;letter-spacing:-.01em;margin:0;color:var(--ink);max-width:22ch;}
  .m-head :is(h2,h3)::after{content:"";display:block;width:52px;height:3px;background:var(--accent);margin-top:15px;border-radius:2px;}
  .objective{font-family:'IBM Plex Mono',monospace;font-size:12.5px;line-height:1.55;color:var(--ink-soft);padding-left:15px;border-left:2px solid var(--accent);max-width:64ch;margin-top:16px;}
  .objective b{color:var(--ink);font-weight:600;letter-spacing:.04em;}

  .content h3{font-family:'Fraunces',Georgia,serif;font-weight:600;font-size:1.3rem;letter-spacing:-.005em;color:var(--ink);margin:38px 0 12px;}
  .content h4{font-family:'IBM Plex Mono',monospace;font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint);margin:28px 0 10px;font-weight:600;}
  .content p{margin:0 0 16px;max-width:68ch;color:var(--ink);}
  .content p.sub{color:var(--ink-soft);}
  .content a.inline{color:var(--accent-ink);text-decoration:none;border-bottom:1px solid var(--accent);}
  .content a.inline:hover{background:var(--accent-tint);}
  .content strong{font-weight:700;}
  .lead-list{max-width:68ch;margin:0 0 16px;padding:0;list-style:none;}
  .lead-list li{position:relative;padding:7px 0 7px 26px;color:var(--ink);border-bottom:1px solid var(--line);}
  .lead-list li:last-child{border-bottom:none;}
  .lead-list li::before{content:"";position:absolute;left:4px;top:15px;width:7px;height:7px;border-radius:1px;background:var(--accent);}
  .lead-list li b{font-weight:700;}

  /* checklist */
  .checkcard{background:var(--panel);border:1px solid var(--line-strong);border-radius:10px;box-shadow:var(--shadow);padding:0;margin:24px 0;overflow:hidden;max-width:68ch;}
  .checkcard .cc-head{background:var(--th-bg);color:var(--th-ink);padding:13px 18px;display:flex;align-items:center;gap:11px;border-bottom:2px solid var(--accent);}
  .checkcard .cc-head .tag{font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-on-dark);}
  .checkcard .cc-head .ttl{font-family:'Fraunces',Georgia,serif;font-weight:600;font-size:1.02rem;color:var(--th-ink);}
  .checkcard ul{list-style:none;margin:0;padding:8px 18px 16px;}
  .checkcard li{position:relative;padding:9px 0 9px 32px;border-bottom:1px dashed var(--line);font-size:14.5px;line-height:1.5;color:var(--ink);}
  .checkcard li:last-child{border-bottom:none;}
  .checkcard li::before{content:"";position:absolute;left:2px;top:11px;width:15px;height:15px;border-radius:4px;border:1.5px solid var(--accent);background:var(--accent-tint);}
  .checkcard li::after{content:"";position:absolute;left:6px;top:14px;width:5px;height:8px;border:solid var(--accent);border-width:0 2px 2px 0;transform:rotate(42deg);}
  .checkcard li b{font-weight:700;}

  /* spec */
  .spec{border:1px solid var(--line-strong);border-radius:10px;overflow:hidden;margin:22px 0;box-shadow:var(--shadow);max-width:72ch;background:var(--panel);}
  .spec .spec-bar{display:flex;align-items:center;gap:10px;background:var(--paper-2);border-bottom:1px solid var(--line);padding:9px 14px;}
  .spec .spec-bar .sk{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-soft);font-weight:600;}
  .spec .copy{margin-left:auto;font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;background:var(--panel);border:1px solid var(--line-strong);color:var(--ink-soft);border-radius:6px;padding:4px 10px;cursor:pointer;}
  .spec .copy:hover{border-color:var(--accent);color:var(--accent-ink);}
  .spec .copy.done{border-color:var(--accent);color:var(--accent-ink);background:var(--accent-tint);}
  .spec pre{margin:0;padding:16px 16px;font-family:'IBM Plex Mono',monospace;font-size:12.8px;line-height:1.62;color:var(--ink);white-space:pre-wrap;word-break:break-word;overflow-x:auto;}
  .spec pre .ph{color:var(--accent-ink);font-weight:500;}
  .spec pre .cm{color:var(--ink-faint);}

  /* compare */
  .compare{border:1px solid var(--line-strong);border-radius:10px;overflow:hidden;margin:22px 0;max-width:72ch;box-shadow:var(--shadow);}
  .compare .row{display:grid;grid-template-columns:96px 1fr;border-bottom:1px solid var(--line);}
  .compare .row:last-child{border-bottom:none;}
  .compare .lab{font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.1em;text-transform:uppercase;display:flex;align-items:center;justify-content:center;text-align:center;font-weight:600;padding:12px 8px;}
  .compare .row.bad .lab{background:var(--bad-bg);color:var(--bad-ink);}
  .compare .row.good .lab{background:var(--accent-tint);color:var(--accent-ink);}
  .compare .txt{padding:13px 16px;font-size:14px;color:var(--ink);background:var(--panel);}
  .compare .txt.mono{font-family:'IBM Plex Mono',monospace;font-size:12.6px;line-height:1.55;color:var(--ink-soft);}

  /* caution */
  .caution{background:var(--caution-tint);border:1px solid var(--caution-line);border-left:3px solid var(--caution);border-radius:8px;padding:15px 18px 15px 16px;margin:22px 0;max-width:68ch;}
  .caution .ct{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--caution);font-weight:600;margin-bottom:6px;display:flex;align-items:center;gap:8px;}
  .caution .ct::before{content:"!";display:inline-flex;align-items:center;justify-content:center;width:15px;height:15px;border-radius:50%;background:var(--caution);color:var(--paper);font-family:'Karla',sans-serif;font-size:11px;font-weight:700;}
  .caution p{margin:0;font-size:14.5px;color:var(--ink);max-width:none;}
  .caution p+p{margin-top:8px;}

  /* table */
  .table-wrap{overflow-x:auto;margin:22px 0;max-width:74ch;border:1px solid var(--line-strong);border-radius:10px;box-shadow:var(--shadow);}
  .table-wrap.wide{max-width:none;}
  .table-wrap.wide table{min-width:760px;}
  table{width:100%;border-collapse:collapse;font-size:14px;background:var(--panel);min-width:540px;}
  thead th{background:var(--th-bg);color:var(--th-ink);text-align:left;padding:12px 15px;font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;font-weight:600;border-bottom:2px solid var(--accent);}
  tbody td{padding:11px 15px;border-bottom:1px solid var(--line);color:var(--ink);vertical-align:top;}
  tbody tr:last-child td{border-bottom:none;}
  tbody td:first-child{font-weight:700;}
  tbody tr:nth-child(even) td{background:var(--stripe);}

  /* platform cards */
  .split{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:24px 0;max-width:74ch;}
  .split.three{grid-template-columns:repeat(3,1fr);max-width:none;}
  .split.quad{grid-template-columns:repeat(2,1fr);max-width:none;}
  .platform{background:var(--panel);border:1px solid var(--line-strong);border-top:2px solid var(--accent);border-radius:10px;padding:20px;box-shadow:var(--shadow);}
  .platform .pt{font-family:'Fraunces',Georgia,serif;font-weight:600;font-size:1.16rem;margin-bottom:4px;color:var(--ink);display:flex;align-items:center;gap:9px;}
  .platform .pt .chip{font-family:'IBM Plex Mono',monospace;font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;background:var(--accent-tint);color:var(--accent-ink);padding:3px 8px;border-radius:3px;font-weight:600;border:1px solid var(--accent);}
  .platform ul{list-style:none;margin:12px 0 0;padding:0;}
  .platform li{position:relative;padding:7px 0 7px 20px;font-size:13.6px;border-bottom:1px solid var(--line);color:var(--ink-soft);}
  .platform li:last-child{border-bottom:none;}
  .platform li::before{content:"";position:absolute;left:2px;top:14px;width:6px;height:6px;background:var(--accent);border-radius:1px;}
  .platform li b{color:var(--ink);font-weight:700;}

  /* ladder */
  .ladder{margin:24px 0;max-width:70ch;border:1px solid var(--line-strong);border-radius:10px;overflow:hidden;box-shadow:var(--shadow);}
  .rung{display:grid;grid-template-columns:66px 1fr;border-bottom:1px solid var(--line);background:var(--panel);}
  .rung:last-child{border-bottom:none;}
  .rung .lvl{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;background:var(--paper-2);border-right:1px solid var(--line);padding:14px 6px;}
  .rung .lvl .lv-k{font-family:'IBM Plex Mono',monospace;font-size:9px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-faint);}
  .rung .lvl .lv-n{font-family:'Fraunces',Georgia,serif;font-weight:700;font-size:1.55rem;color:var(--ink-faint);line-height:1;}
  .rung .rbody{padding:14px 18px;}
  .rung .rbody h5{font-family:'Fraunces',Georgia,serif;font-weight:600;font-size:1.05rem;margin:0 0 4px;color:var(--ink);}
  .rung .rbody p{margin:0;font-size:13.8px;color:var(--ink-soft);max-width:none;}
  .rung.hi .lvl{background:var(--accent-tint);border-right-color:var(--accent);}
  .rung.hi .lvl .lv-n{color:var(--accent-ink);}

  /* footer */
  .foot{padding:44px 0 10px;color:var(--ink-faint);font-size:12.5px;max-width:72ch;}
  .foot .fl{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.12em;text-transform:lowercase;color:var(--ink-faint);margin-bottom:12px;}
  .foot a{color:var(--ink-soft);text-decoration:none;border-bottom:1px solid var(--line-strong);}
  .foot a:hover{color:var(--accent-ink);}
  .foot p{margin:0 0 9px;line-height:1.6;}

  .scrim{display:none;}

  @media (max-width:920px){.readouts{grid-template-columns:repeat(2,1fr);}.split,.split.three,.split.quad{grid-template-columns:1fr;}}
  @media (max-width:768px){
    .menu-btn{display:flex;}
    .rail{position:fixed;top:var(--chrome-h);left:0;bottom:0;z-index:55;width:280px;transform:translateX(-102%);transition:transform .22s ease;box-shadow:8px 0 24px rgba(0,0,0,.18);height:calc(100vh - var(--chrome-h));}
    .rail.open{transform:translateX(0);}
    .scrim.show{display:block;position:fixed;inset:var(--chrome-h) 0 0 0;background:rgba(10,8,5,.42);z-index:54;}
    .content{padding:0 20px 100px;}
    .compare .row{grid-template-columns:70px 1fr;}
    .topbar .rev{display:none;}
    .theme-btn .theme-label{display:none;}
    .theme-btn{padding:0 9px;}
  }
  @media (max-width:700px){
  }
  @media (prefers-reduced-motion:reduce){.rail{transition:none;}}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:3px;}

  /* reading-level tiers */
  .tier{display:none;}
  html[data-level="beginner"] .tier-b{display:block;}
  html[data-level="intermediate"] .tier-i{display:block;}
  html[data-level="expert"] .tier-e{display:block;}
  .tier-tag{display:inline-flex;align-items:center;gap:8px;font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-ink);border:1px solid var(--accent);background:var(--accent-tint);border-radius:3px;padding:4px 10px;margin:0 0 20px;font-weight:600;}
  .tier-tag::before{content:"";width:6px;height:6px;border-radius:1px;background:var(--accent);}
  /* level bar */
  .levelbar{position:fixed;top:calc(var(--site-nav-height) + var(--topbar-h));left:0;right:0;height:var(--levelbar-h);z-index:59;background:var(--paper-2);border-bottom:1px solid var(--line-strong);display:flex;align-items:center;}
  .lb-inner{max-width:1280px;margin:0 auto;width:100%;padding:0 18px;display:flex;align-items:center;gap:14px;}
  .lb-label{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.13em;text-transform:lowercase;color:var(--ink-faint);white-space:nowrap;}
  .seg{display:inline-flex;border:1px solid var(--line-strong);border-radius:8px;overflow:hidden;background:var(--panel);}
  .seg-btn{border:none;background:transparent;color:var(--ink-soft);font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.06em;text-transform:uppercase;padding:6px 15px;cursor:pointer;border-right:1px solid var(--line);}
  .seg-btn:last-child{border-right:none;}
  .seg-btn:hover{color:var(--ink);background:var(--paper-2);}
  .seg-btn.active{background:var(--accent);color:var(--panel);font-weight:600;}
  .seg-btn .sm{display:none;}
  .lb-hint{margin-left:auto;font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.03em;text-transform:lowercase;color:var(--ink-faint);white-space:nowrap;}
  @media (max-width:768px){
    .lb-label,.lb-hint{display:none;}
    .lb-inner{padding:0 12px;justify-content:center;}
    .seg-btn{padding:6px 14px;}
    .seg-btn .lg{display:none;} .seg-btn .sm{display:inline;}
  }

  /* nav groups + reference nav */
  .rail .nav-group{font-family:'IBM Plex Mono',monospace;font-size:9.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent-ink);margin:20px 0 8px 4px;padding-top:15px;border-top:1px solid var(--line);}
  .rail a.sub{padding-left:24px;font-size:12.8px;}
  /* part divider */
  .partbar{margin:66px 0 0;padding-top:16px;border-top:2px solid var(--accent);scroll-margin-top:calc(var(--chrome-h) + 2px);}
  .partbar .pl{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--accent-ink);margin:0 0 8px;}
  .partbar :is(h2,h3){font-family:'Fraunces',Georgia,serif;font-weight:700;font-size:clamp(1.7rem,3.4vw,2.4rem);color:var(--ink);margin:0 0 10px;letter-spacing:-.01em;}
  .partbar p{color:var(--ink-soft);max-width:64ch;margin:0;font-size:15px;}
  /* deep-dive header chip */
  .m-head :is(h2,h3) .chip{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;background:var(--accent-tint);color:var(--accent-ink);padding:4px 10px;border-radius:4px;font-weight:600;border:1px solid var(--accent);vertical-align:middle;margin-left:12px;position:relative;top:-4px;}
  /* glossary */
  .deflist{border:1px solid var(--line-strong);border-radius:10px;overflow:hidden;margin:22px 0;max-width:76ch;box-shadow:var(--shadow);}
  .defrow{display:grid;grid-template-columns:190px 1fr;border-bottom:1px solid var(--line);background:var(--panel);}
  .defrow:last-child{border-bottom:none;}
  .defrow:nth-child(even){background:var(--stripe);}
  .defrow .dt{font-family:'IBM Plex Mono',monospace;font-size:12px;font-weight:600;color:var(--accent-ink);padding:12px 14px;border-right:1px solid var(--line);}
  .defrow .dd{padding:12px 16px;font-size:13.8px;color:var(--ink);}
  @media (max-width:640px){.defrow{grid-template-columns:1fr;}.defrow .dt{border-right:none;border-bottom:1px dashed var(--line);}}

  /* verify / time-sensitive callout */
  .verify{background:var(--accent-tint);border:1px solid var(--accent);border-left:3px solid var(--accent);border-radius:8px;padding:14px 18px 14px 16px;margin:22px 0;max-width:72ch;}
  .verify .vt{font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-ink);font-weight:600;margin-bottom:6px;display:flex;align-items:center;gap:8px;}
  .verify .vt::before{content:"";width:13px;height:13px;border:2px solid var(--accent);border-radius:50%;box-sizing:border-box;}
  .verify p{margin:0;font-size:14px;color:var(--ink);max-width:none;}
  .verify p+p{margin-top:6px;}
  /* reference-section tag */
  .ref-tag{display:inline-flex;align-items:center;gap:8px;font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft);border:1px dashed var(--line-strong);background:var(--paper-2);border-radius:3px;padding:4px 10px;margin:0 0 20px;font-weight:600;}
  .ref-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--ink-faint);}
  .m-index.ref{color:var(--ink-soft);border-color:var(--line-strong);background:var(--paper-2);}
  /* deep-dive profile header */
  .ddh{font-family:'Fraunces',Georgia,serif;font-weight:700;font-size:1.34rem;color:var(--ink);margin:42px 0 3px;display:flex;align-items:center;gap:11px;padding-top:14px;border-top:2px solid var(--accent);}
  .ddh:first-of-type{margin-top:8px;}
  .ddh .chip{font-family:'IBM Plex Mono',monospace;font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;background:var(--accent-tint);color:var(--accent-ink);padding:3px 8px;border-radius:3px;font-weight:600;border:1px solid var(--accent);}
  .ddsub{font-family:'IBM Plex Mono',monospace;font-size:11.5px;color:var(--ink-faint);margin:0 0 14px;text-transform:lowercase;letter-spacing:.03em;}
  .ddlabel{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-ink);font-weight:600;margin:18px 0 8px;}
  /* glossary */
  .glossary{border:1px solid var(--line-strong);border-radius:10px;overflow:hidden;margin:22px 0;max-width:76ch;box-shadow:var(--shadow);}
  .grow{display:grid;grid-template-columns:214px 1fr;border-bottom:1px solid var(--line);background:var(--panel);}
  .grow:last-child{border-bottom:none;}
  .gterm{padding:12px 16px;border-right:1px solid var(--line);background:var(--paper-2);font-family:'Fraunces',Georgia,serif;font-weight:600;font-size:1rem;color:var(--ink);}
  .gdef{padding:12px 16px;font-size:13.8px;color:var(--ink-soft);line-height:1.55;}
  .gdef b{color:var(--ink);font-weight:600;}
  .rail a .rf{margin-left:auto;font-family:'IBM Plex Mono',monospace;font-size:8px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);border:1px solid var(--line);border-radius:3px;padding:1px 4px;align-self:center;}
  @media (max-width:600px){.grow{grid-template-columns:1fr;}.gterm{border-right:none;border-bottom:1px solid var(--line);}}