/* ============================================================
   Khaled Jassem · Lab — shared theme
   Type: Newsreader (serif) · Accent: oxblood · Paper: warm white
   ============================================================ */
:root{
  --paper:#FBFAF7;
  --ink:#1A1A18;
  --muted:#6E6C64;
  --faint:#96938a;
  --line:#E3DFD6;
  --line-soft:#EDEAE2;
  --ox:#7B2D2A;
  --ox-soft:#A5544B;
  --panel:#26231F;
  --panel-ink:#EFE9DF;
  --measure:68ch;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:"Newsreader",Georgia,serif;font-optical-sizing:auto;
  font-size:19px;line-height:1.62;-webkit-font-smoothing:antialiased;
}
p{margin:0 0 1.05em}
em,i,cite{font-style:italic}
a{color:var(--ox);text-decoration:none;border-bottom:1px solid rgba(123,45,42,.28)}
a:hover{border-bottom-color:var(--ox)}
:focus-visible{outline:2px solid var(--ox);outline-offset:3px}
img{max-width:100%}
#bar{position:fixed;top:0;left:0;height:2px;width:0;background:var(--ox);z-index:60;transition:width .08s linear}

/* ---------- global site header ---------- */
.site{
  position:sticky;top:0;z-index:40;background:rgba(251,250,247,.86);
  backdrop-filter:saturate(120%) blur(6px);
  border-bottom:1px solid var(--line);
  display:flex;align-items:baseline;justify-content:space-between;gap:20px;
  padding:14px clamp(18px,5vw,54px);
}
.site .wordmark{font-size:17px;font-weight:600;border:0;color:var(--ink);letter-spacing:.005em}
.site .wordmark span{color:var(--ox);font-style:italic;font-weight:500}
.site nav{display:flex;gap:22px;align-items:baseline;flex-wrap:wrap}
.site nav a{border:0;color:var(--muted);font-size:15.5px}
.site nav a:hover,.site nav a.here{color:var(--ox)}
.site nav a.ext{color:var(--faint);font-size:14px;font-style:italic}

/* ---------- layout with side index (hub + model) ---------- */
.layout{display:grid;grid-template-columns:250px minmax(0,1fr);max-width:1200px;margin:0 auto}
.index{
  position:sticky;top:52px;align-self:start;height:calc(100vh - 52px);overflow-y:auto;
  padding:34px 24px 60px;border-right:1px solid var(--line);
}
.index .idx-title{font-style:italic;color:var(--faint);font-size:13px;margin:0 0 14px}
.index nav{font-size:13.5px;line-height:1.3}
.index .grp{font-style:italic;color:var(--faint);font-size:12px;margin:18px 0 6px}
.index a{display:block;border:0;color:var(--muted);padding:4px 0 4px 30px;position:relative;transition:color .15s;line-height:1.32}
.index a .rn{position:absolute;left:0;top:4px;font-size:11px;font-style:italic;color:var(--faint);width:22px;text-align:right}
.index a:hover{color:var(--ink)}
.index a.active{color:var(--ox)}
.index a.active .rn{color:var(--ox)}

.main{padding:0 clamp(22px,6vw,84px) 120px;min-width:0}
.reading{max-width:var(--measure);margin:0 auto;padding:0 clamp(20px,6vw,40px) 120px}
.col{max-width:var(--measure);margin:0 auto}

/* ---------- landing ---------- */
.hero-lab{padding:15vh 0 7vh;max-width:var(--measure);margin:0 auto}
.hero-lab .eyebrow{font-style:italic;color:var(--ox);font-size:16px;margin-bottom:20px}
.hero-lab h1{font-weight:500;font-size:clamp(34px,6vw,58px);line-height:1.05;letter-spacing:-.014em;margin:0 0 .42em;text-wrap:balance}
.hero-lab .sub{font-size:clamp(18px,2.4vw,21px);color:var(--muted);font-style:italic;max-width:52ch;line-height:1.5;margin:0}

.doors{max-width:var(--measure);margin:2vh auto 0;border-top:1px solid var(--line)}
.door{display:block;border:0;border-bottom:1px solid var(--line);padding:30px 0}
.door:hover{border-bottom-color:var(--line)}
.door .dt{font-size:clamp(23px,3vw,30px);font-weight:500;color:var(--ink);letter-spacing:-.01em;line-height:1.1;transition:color .15s}
.door:hover .dt{color:var(--ox)}
.door .dd{font-size:18px;color:var(--muted);font-style:italic;margin:.3em 0 0;max-width:56ch}
.lab-foot{max-width:var(--measure);margin:6vh auto 0;color:var(--muted);font-style:italic;font-size:17px}

/* ---------- cover / note (essays hub) ---------- */
.cover{padding:11vh 0 5vh;border-bottom:1px solid var(--line)}
.cover .eyebrow{font-style:italic;color:var(--ox);font-size:16px;margin-bottom:18px}
.cover h1{font-weight:500;font-size:clamp(32px,5.4vw,52px);line-height:1.05;letter-spacing:-.012em;margin:0 0 .4em;text-wrap:balance}
.cover h1 em{font-style:italic;color:var(--ox)}
.cover .sub{font-size:clamp(18px,2.3vw,21px);color:var(--muted);font-style:italic;max-width:52ch;line-height:1.5}
.note{margin:5vh 0}
.note p{font-size:19.5px}
.note p.lead::first-letter{font-size:3.1em;line-height:.8;float:left;margin:.04em .09em 0 0;color:var(--ox);font-weight:500}
.note .rule{width:64px;height:1px;background:var(--ox);margin:2.2em 0 2em;opacity:.7}

.contents{margin:4vh 0 2vh;border-top:1px solid var(--line);padding-top:3vh}
.contents .cpart{font-style:italic;color:var(--ox);font-size:15px;margin:1.8em 0 .4em}
.contents ol{list-style:none;margin:0;padding:0}
.contents li{display:flex;gap:16px;align-items:baseline;padding:8px 0;border-bottom:1px solid var(--line-soft)}
.contents li .rn{color:var(--ox-soft);font-style:italic;font-size:14px;min-width:34px;flex:none}
.contents li a{border:0;color:var(--ink);font-size:17.5px;line-height:1.3}
.contents li a:hover{color:var(--ox)}
.contents li .cd{display:block;color:var(--muted);font-style:italic;font-size:14.5px;margin-top:2px}

/* ---------- essay reading page ---------- */
.essay-page{padding:8vh 0 0}
.essay-head{position:relative;margin-bottom:2.4em}
.essay-kicker{font-style:italic;color:var(--faint);font-size:15px;margin-bottom:1.4em}
.essay-kicker a{border:0;color:var(--ox-soft)}
.essay-num{display:block;font-size:40px;line-height:1;font-style:italic;color:rgba(123,45,42,.34);margin-bottom:.12em}
.essay-page h1{font-weight:500;font-size:clamp(28px,4vw,40px);line-height:1.08;letter-spacing:-.014em;margin:0 0 .34em;text-wrap:balance}
.essay-page .dek{font-style:italic;color:var(--muted);font-size:21px;line-height:1.45;margin:0;max-width:54ch}
.essay-body{font-size:19px}
.essay-body>p:first-child::first-letter{font-size:3.05em;line-height:.8;float:left;margin:.03em .1em 0 0;color:var(--ox);font-weight:500}
.essay-body h4{font-weight:600;font-size:18px;margin:1.8em 0 .3em;color:var(--ink)}
.essay-body blockquote{margin:1.5em 0;padding:.2em 0 .2em 1.3em;border-left:2px solid var(--ox-soft);font-style:italic;font-size:21px;line-height:1.5;color:var(--ink)}
.further{margin-top:2.6em;padding-top:1.2em;border-top:1px solid var(--line-soft);font-size:15px;color:var(--muted);line-height:1.5}
.further .lbl{font-style:italic;color:var(--faint);margin-right:.4em}

/* prev / next */
.pagenav{display:flex;justify-content:space-between;gap:24px;margin:7vh 0 0;padding-top:2.4em;border-top:1px solid var(--line)}
.pagenav a{border:0;max-width:46%}
.pagenav .dir{display:block;font-style:italic;color:var(--faint);font-size:13.5px;margin-bottom:.25em}
.pagenav .tt{color:var(--ink);font-size:17px;line-height:1.25}
.pagenav a:hover .tt{color:var(--ox)}
.pagenav .next{margin-left:auto;text-align:right}

/* ---------- model hero ---------- */
.model-hero{max-width:var(--measure);margin:0 auto;padding:9vh 0 3vh}
.model-hero .eyebrow{font-style:italic;color:var(--ox);font-size:16px;margin-bottom:16px}
.model-hero h1{font-weight:500;font-size:clamp(30px,5vw,48px);line-height:1.05;letter-spacing:-.014em;margin:0 0 .4em;text-wrap:balance}
.model-hero .sub{font-size:clamp(17px,2.2vw,20px);color:var(--muted);font-style:italic;max-width:54ch;line-height:1.5;margin:0 0 1.6em}
.seq{font-size:15px;color:var(--ink);letter-spacing:.01em;line-height:1.9}
.seq b{font-weight:600}
.seq .ar{color:var(--ox-soft);padding:0 .3em}
.figwrap{margin:4vh auto;max-width:var(--measure);display:flex;flex-direction:column;align-items:center}
.figwrap figcaption{margin-top:12px;font-style:italic;color:var(--faint);font-size:14px}
.cycle{width:100%;max-width:380px;height:auto;color:#C4B4A4}
.cy-ring{fill:none;stroke:rgba(26,26,24,.10);stroke-width:1}
.cy-arc path{fill:none;stroke:#C4B4A4;stroke-width:1.4}
.cy-sym{fill:var(--ink);font-family:"Newsreader",serif;font-weight:600;font-size:17px;text-anchor:middle;font-style:italic}
.cy-lab{fill:var(--muted);font-family:"Newsreader",serif;font-size:9px;font-style:italic;letter-spacing:.02em}
.cy-center-k{fill:var(--ox);font-family:"Newsreader",serif;font-weight:600;font-size:26px;text-anchor:middle;font-style:italic}
.cy-center-l{fill:var(--ox-soft);font-family:"Newsreader",serif;font-size:9px;font-style:italic;text-anchor:middle}

.metapanel{max-width:var(--measure);margin:2vh auto 2.4em;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.metapanel .row{display:flex;gap:18px;padding:9px 0;border-bottom:1px solid var(--line-soft);font-size:15px}
.metapanel .row:last-child{border-bottom:0}
.metapanel .mk{font-style:italic;color:var(--faint);min-width:180px;flex:none}
.metapanel .mv{color:var(--ink)}
.dims{max-width:var(--measure);margin:0 auto 2vh;display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.dim{border-top:2px solid var(--ox-soft);padding:14px 0 0}
.dim h4{margin:0 0 4px;font-size:16px;font-weight:600;color:var(--ink)}
.dim p{margin:0;font-size:14.5px;color:var(--muted);line-height:1.45}

/* ---------- model document body ---------- */
.doc{max-width:var(--measure);margin:0 auto}
.doc h1{font-family:"Newsreader",serif;font-weight:500;font-size:clamp(25px,3.3vw,34px);line-height:1.1;letter-spacing:-.012em;margin:2.6em 0 .5em;padding-top:1.3em;border-top:1px solid var(--line)}
.doc>h1:first-of-type{border-top:0;padding-top:0;margin-top:.4em}
.doc h1 .secnum{font-style:italic;font-size:.5em;color:var(--ox);margin-right:.55em;vertical-align:.28em}
.doc h2{font-family:"Newsreader",serif;font-weight:500;font-size:clamp(21px,2.5vw,26px);line-height:1.14;margin:1.7em 0 .45em;letter-spacing:-.008em}
.doc h3{font-weight:600;font-size:18px;margin:1.5em 0 .3em;color:var(--ink)}
.doc h3::before{content:"";display:inline-block;width:7px;height:7px;margin-right:9px;border-radius:1px;background:var(--ox);transform:translateY(-2px)}
.doc h4{font-weight:600;font-size:16.5px;margin:1.2em 0 .2em;color:var(--ink)}
.doc p{margin:0 0 1.02em}
.doc strong{font-weight:600}
.doc ul,.doc ol{margin:0 0 1.1em;padding-left:1.35em}
.doc li{margin:.26em 0;padding-left:.15em}
.doc ul li::marker{color:var(--ox-soft)}
.doc ol li::marker{color:var(--faint);font-style:italic}
.doc hr{border:0;border-top:1px solid var(--line-soft);margin:2.2em 0}
.doc a[href^="http"]{color:var(--ox);word-break:break-word}
.doc blockquote{margin:1.4em 0;padding:.5em 0 .5em 1.25em;border-left:2px solid var(--ox-soft);font-style:italic;font-size:20px;line-height:1.5;color:var(--ink)}
.doc blockquote p{margin:.3em 0}
.doc blockquote strong{color:var(--ink);font-style:normal}
.doc pre{background:var(--panel);color:var(--panel-ink);border-radius:8px;padding:18px 20px;overflow-x:auto;margin:1.5em 0;line-height:1.5}
.doc pre code{font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;font-size:13px;white-space:pre;color:inherit;background:none;padding:0}
.doc :not(pre)>code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.85em;background:#F0EBE2;padding:.1em .38em;border-radius:4px;color:var(--ox)}
.mathblock{display:block;margin:1.3em 0;padding:.3em 0;overflow-x:auto;overflow-y:hidden;text-align:center}
mjx-container{color:var(--ink)!important}
mjx-container[display="true"]{margin:0!important}
.doc table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:14.5px;line-height:1.45;display:block;overflow-x:auto}
.doc thead th{background:var(--panel);color:var(--panel-ink);font-weight:500;font-style:italic;text-align:left;padding:11px 13px;white-space:nowrap}
.doc tbody td{padding:10px 13px;border-bottom:1px solid var(--line-soft);vertical-align:top}
.doc tbody tr:nth-child(even){background:#FCFBF8}
.doc tbody tr:last-child{background:#F5F0E8}
.doc tbody td:first-child{font-weight:600}

/* ---------- footer ---------- */
.foot{max-width:var(--measure);margin:7vh auto 0;padding:2.6em clamp(20px,6vw,40px) 5vh;border-top:1px solid var(--line);color:var(--muted);font-style:italic;font-size:15px;line-height:1.7}
.foot a{color:var(--ox-soft)}
.endmark{max-width:var(--measure);margin:7vh auto 0;padding-top:2.6em;border-top:1px solid var(--line);text-align:center;color:var(--muted);font-style:italic;font-size:15px;line-height:1.7}

/* ---------- responsive ---------- */
.navbtn{display:none}
@media (max-width:900px){
  .layout{grid-template-columns:1fr}
  .index{
    position:fixed;z-index:45;top:0;left:0;width:274px;height:100vh;background:var(--paper);
    transform:translateX(-100%);transition:transform .25s ease;box-shadow:0 0 40px rgba(0,0,0,.10);
    padding-top:26px;
  }
  .index.open{transform:none}
  .scrim{display:none;position:fixed;inset:0;z-index:44;background:rgba(20,18,16,.34)}
  .scrim.open{display:block}
  .navbtn{
    display:inline-block;background:transparent;border:0;color:var(--ox);
    font-family:inherit;font-style:italic;font-size:15px;cursor:pointer;padding:0;margin-right:auto
  }
  .dims{grid-template-columns:1fr}
  .metapanel .row{flex-direction:column;gap:2px}
  .metapanel .mk{min-width:0}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto;transition:none!important}}