/* Layout: calm reading column, left "margin note" rail for section labels, zellige-green accent used sparingly */
:root{
  --bg:#F5F7F6; --surface:#FFFFFF; --ink:#16202A; --muted:#55636B; --line:#D6DEDB;
  --accent:#0E6B5A; --accent-soft:#E2EFEB; --onaccent:#FFFFFF;
  --display:"Spectral",Georgia,"Times New Roman",serif;
  --body:"Public Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0F1517; --surface:#162024; --ink:#E6ECEA; --muted:#9AA9A6; --line:#2A3639;
  --accent:#5CC4AA; --accent-soft:#183A33; --onaccent:#0B1412; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0F1517; --surface:#162024; --ink:#E6ECEA; --muted:#9AA9A6; --line:#2A3639;
  --accent:#5CC4AA; --accent-soft:#183A33; --onaccent:#0B1412; color-scheme:dark}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:1.0625rem;line-height:1.65;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
img{max-width:100%;display:block}
[hidden]{display:none!important}
a{color:var(--accent);text-underline-offset:3px}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.wrap{max-width:1040px;margin:0 auto}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:8px;background:var(--surface);padding:8px 12px;z-index:10}

/* header */
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:var(--bg);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;justify-content:space-between;align-items:center;gap:10px 24px;padding-block:14px;flex-wrap:wrap}
.brand{font-family:var(--display);font-weight:600;font-size:1.15rem;color:var(--ink);text-decoration:none}
nav{display:flex;gap:4px 18px;flex-wrap:wrap;font-size:.92rem}
nav a{color:var(--muted);text-decoration:none;padding-block:2px;border-bottom:2px solid transparent}
nav a:hover{color:var(--accent)}
nav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--accent)}

/* shared type */
.eyebrow{font-family:var(--mono);font-size:.78rem;text-transform:uppercase;letter-spacing:.12em;color:var(--accent)}
h1,h2,h3{text-wrap:balance}
h3{font-family:var(--display);font-weight:600;font-size:1.2rem;margin:0 0 6px}
.btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:11px 20px;border-radius:4px;font-weight:600;font-size:.95rem;text-decoration:none;border:1px solid var(--accent);cursor:pointer;font-family:var(--body)}
.btn.primary{background:var(--accent);color:var(--onaccent)}
.btn.ghost{background:transparent;color:var(--accent)}

/* home */
.hero{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:56px;align-items:center;padding-block:64px 48px}
.hero-text{display:grid;gap:18px}
.hero h1{font-family:var(--display);font-weight:400;font-size:clamp(2.3rem,5.4vw,3.6rem);line-height:1.08;margin:0}
.hero h1 em{color:var(--accent);font-style:italic}
.hero p{margin:0;color:var(--muted);max-width:60ch}
.cred{font-family:var(--mono);font-size:.8rem;color:var(--ink);display:flex;flex-wrap:wrap;gap:6px 18px}
.portrait{margin:0;position:relative;max-width:360px;width:100%;justify-self:end}
.portrait img,.portrait-placeholder{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:2px;max-width:100%}
.portrait::after{content:"";position:absolute;inset:14px -14px -14px 14px;border:1px solid var(--accent);z-index:-1;border-radius:2px}
.portrait-placeholder{background:var(--accent-soft);display:grid;place-content:center;justify-items:center;gap:6px;color:var(--accent)}
.portrait-placeholder span{font-family:var(--display);font-size:4.5rem;line-height:1}
.portrait-placeholder small{font-family:var(--mono);font-size:.75rem;letter-spacing:.08em;text-transform:uppercase}
.tiles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);margin-block:24px 72px}
.tile{background:var(--surface);padding:22px;display:grid;gap:8px;text-decoration:none;color:var(--ink)}
.tile strong{font-family:var(--display);font-weight:600;font-size:1.15rem;line-height:1.3}
.tile .go{font-size:.88rem;color:var(--muted)}
.tile:hover strong{color:var(--accent)}

/* inner pages */
.pagehead{padding-block:56px 40px;display:grid;gap:12px;max-width:780px}
.pagehead h1{font-family:var(--display);font-weight:400;font-size:clamp(2rem,4.6vw,3rem);line-height:1.12;margin:0}
.lede{margin:0;color:var(--muted);font-size:1.1rem;max-width:62ch}
section{display:grid;grid-template-columns:200px minmax(0,1fr);gap:32px;padding-block:40px;border-top:1px solid var(--line)}
section > .label{font-family:var(--mono);font-size:.78rem;text-transform:uppercase;letter-spacing:.12em;color:var(--accent);padding-top:4px;line-height:1.5}
.lsub{color:var(--muted);text-transform:none;letter-spacing:0}
.prose p{max-width:65ch;margin:0 0 14px}
main > :last-child{margin-bottom:64px}

.themes{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none}
.themes li{font-size:.92rem;border:1px solid var(--line);background:var(--surface);padding:6px 12px;border-radius:2px}
.facts{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:24px}
.facts p{margin:0;color:var(--muted);font-size:.96rem}

.projects{display:grid;gap:28px}
.proj,.timeline li{display:grid;grid-template-columns:110px minmax(0,1fr);gap:20px}
.meta,.yr{font-family:var(--mono);font-size:.8rem;color:var(--muted);font-variant-numeric:tabular-nums;padding-top:3px}
.proj p{margin:0;color:var(--muted)}
.timeline{list-style:none;padding:0;margin:0;display:grid;gap:20px}
.timeline strong{display:block;font-weight:600}
.timeline .org{display:block;font-family:var(--display);font-style:italic;color:var(--ink)}
.timeline .sub{display:block;color:var(--muted);font-size:.95rem;max-width:62ch}

.pubs{list-style:none;padding:0;margin:0;display:grid;gap:16px}
.pubs li{padding-left:16px;border-left:2px solid var(--line);max-width:70ch;font-size:.98rem}
.pubs .status{font-family:var(--mono);font-size:.74rem;color:var(--accent);display:block;margin-bottom:2px;text-transform:uppercase;letter-spacing:.08em}

.inst{font-family:var(--mono);font-weight:500;font-size:.78rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin:0 0 12px}
.modlist + .inst{margin-top:32px}
.modlist{list-style:none;padding:0;margin:0;display:grid;gap:0}
.modlist li{padding-block:14px;border-bottom:1px solid var(--line)}
.modlist li:first-child{padding-top:0}
.modhead{display:flex;flex-wrap:wrap;justify-content:space-between;gap:2px 16px;align-items:baseline}
.modlist p{margin:4px 0 0;color:var(--muted);font-size:.96rem;max-width:65ch}
.code{font-family:var(--mono);font-size:.78rem;color:var(--muted);font-variant-numeric:tabular-nums}

.services{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.svc{background:var(--surface);padding:28px;display:grid;gap:10px;align-content:start}
.svc h2{font-family:var(--display);font-weight:400;font-size:1.6rem;line-height:1.2;margin:0}
.svc p{margin:0;color:var(--muted)}
.svc ul{margin:4px 0 0;padding-left:18px;font-size:.96rem;display:grid;gap:4px}
.cta{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;padding-block:32px;margin-bottom:64px}
.cta p{margin:0;font-family:var(--display);font-size:1.4rem}

.posts{display:grid}
.post{padding-block:22px;border-bottom:1px solid var(--line);display:grid;gap:4px}
.post:first-child{border-top:1px solid var(--line)}
.post h2{font-family:var(--display);font-weight:600;font-size:1.35rem;margin:0}
.post .date{font-family:var(--mono);font-size:.78rem;color:var(--muted)}
.post p{margin:0;color:var(--muted)}
.tag{display:inline-block;font-family:var(--mono);font-size:.72rem;background:var(--accent-soft);color:var(--accent);padding:2px 8px;border-radius:2px;margin-right:6px}
.note{font-size:.88rem;color:var(--muted);font-style:italic}

form{display:grid;gap:16px;max-width:640px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
label{display:grid;gap:6px;font-size:.9rem;font-weight:500}
.opt{color:var(--muted);font-weight:400}
input,select,textarea{font:inherit;font-size:1rem;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:4px;padding:10px 12px;width:100%}
textarea{min-height:160px;resize:vertical}
.formstatus{font-size:.93rem;padding:12px 14px;background:var(--accent-soft);border-radius:4px;color:var(--ink)}

footer{border-top:1px solid var(--line);padding-block:28px 40px;color:var(--muted);font-size:.88rem}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}

@media (max-width:820px){
  .hero{grid-template-columns:1fr;gap:40px;padding-block:40px}
  .portrait{width:min(240px,70%);order:-1;justify-self:start}
  .tiles{grid-template-columns:1fr}
  .services{grid-template-columns:1fr}
}
@media (max-width:720px){
  section{grid-template-columns:1fr;gap:12px;padding-block:32px}
  .proj,.timeline li{grid-template-columns:1fr;gap:2px}
  .row{grid-template-columns:1fr}
  .pagehead{padding-block:40px 28px}
}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}

/* teaching: led modules */
.intro{margin:0 0 20px;color:var(--muted);max-width:65ch}
.ledgrid{display:grid;gap:20px}
.led{background:var(--surface);border:1px solid var(--line);border-top:3px solid var(--accent);padding:24px;display:grid;gap:10px}
.ledhead{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.role{font-family:var(--mono);font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;background:var(--accent-soft);color:var(--accent);padding:3px 8px;border-radius:2px}
.led h3{font-size:1.4rem;font-weight:400;margin:0}
.led p{margin:0;max-width:68ch}
.ledfacts{font-size:.88rem;color:var(--muted)}
.topics{list-style:none;padding:0;margin:4px 0 0;display:flex;flex-wrap:wrap;gap:6px}
.topics li{font-size:.84rem;border:1px solid var(--line);padding:3px 10px;border-radius:2px;color:var(--muted)}
.modlink{font-size:.9rem;justify-self:start}

/* second heading block inside a page (e.g. Experience on About) */
.pagehead.subhead{border-top:1px solid var(--line);margin-top:24px}
.pagehead h2{font-family:var(--display);font-weight:400;font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.12;margin:0}

/* teaching photos */
.classroom{display:flex;gap:16px;margin-bottom:48px}
.classroom figure{margin:0;flex:var(--r) 1 0;min-width:0;display:grid;gap:8px;align-content:start}
.classroom img{width:100%;height:auto;border-radius:2px}
figcaption{font-size:.85rem;color:var(--muted);line-height:1.45}
.withfig{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:28px;align-items:start}
.withfig > .intro{margin:0}
.evidence{margin:0;display:grid;gap:8px}
.evidence img{width:100%;height:auto;border:1px solid var(--line);border-radius:2px}
section > .withfig{min-width:0}
.ledgrid{margin-top:20px}
@media (max-width:820px){
  .classroom{flex-direction:column}
  .withfig{grid-template-columns:1fr}
  .evidence{max-width:320px}
}

/* research photos */
.photorow{display:flex;gap:14px;margin-top:16px}
.photorow figure{margin:0;flex:var(--r) 1 0;min-width:0;display:grid;gap:8px;align-content:start}
.photorow img{width:100%;height:auto;border-radius:2px}
.photorow figure:only-child{max-width:640px}
.withfig.wide{grid-template-columns:minmax(0,1fr) 280px}
@media (max-width:820px){
  .photorow{flex-direction:column}
  .withfig.wide{grid-template-columns:1fr}
}

/* blog posts */
.post h2 a{color:var(--ink);text-decoration:none}
.post h2 a:hover{color:var(--accent);text-decoration:underline}
.article{max-width:700px;padding-block:48px 72px;display:grid;gap:14px}
.back{font-size:.9rem;text-decoration:none}
.article h1{font-family:var(--display);font-weight:400;font-size:clamp(2rem,4.6vw,2.9rem);line-height:1.12;margin:0}
.byline{font-family:var(--mono);font-size:.8rem;color:var(--muted);margin:0}
.standfirst{font-family:var(--display);font-size:1.3rem;line-height:1.5;margin:8px 0 8px;padding-bottom:24px;border-bottom:1px solid var(--line)}
.article-body{font-size:1.08rem;line-height:1.75}
.article-body p{margin:0 0 18px}
.article-body h2{font-family:var(--display);font-weight:600;font-size:1.45rem;margin:36px 0 12px}
.article-body ul{padding-left:20px;margin:0 0 18px;display:grid;gap:8px}
.refs,.more{border-top:1px solid var(--line);padding-top:24px;margin-top:24px}
.refs h2,.more h2{font-family:var(--mono);font-weight:500;font-size:.78rem;text-transform:uppercase;letter-spacing:.12em;color:var(--accent);margin:0 0 14px}
.refs ol{padding-left:20px;margin:0;display:grid;gap:8px;font-size:.92rem;color:var(--muted)}
.more ul{list-style:none;padding:0;margin:0 0 18px;display:grid;gap:8px;font-family:var(--display);font-size:1.15rem}

/* ===== Phone fixes (added Oct 2026) ===== */
/* Keep photos in proportion */
.portrait img{height:auto}

@media (max-width:720px){
  /* Header: compact, and not stuck to the top of the screen */
  header.top{position:static}
  header.top .wrap{flex-direction:column;align-items:flex-start;gap:6px;padding-block:12px 10px}
  nav{gap:4px 12px}
  nav a{white-space:nowrap;font-size:.9rem}

  /* Home: smaller portrait so the headline is visible straight away */
  .hero{gap:24px;padding-block:28px 32px}
  .portrait{width:150px}
  .portrait::after{inset:8px -8px -8px 8px}
  .hero h1{font-size:2.1rem}

  /* Classroom photos: stop the tall photo filling the whole screen */
  .classroom{gap:20px;margin-bottom:32px}
  .classroom img{max-height:320px;object-fit:cover}

  /* General spacing and type */
  .pagehead{padding-block:28px 20px}
  .pagehead h1{font-size:1.9rem}
  section{padding-block:28px}
  .lede{font-size:1.02rem}
  .svc{padding:20px}
  .led{padding:18px}
  .tiles{margin-block:8px 40px}
  .article{padding-block:28px 48px}
  .standfirst{font-size:1.15rem}
  .article-body{font-size:1rem}
}