/* GY Lee Laboratory — site styles
   Palette is taken from the PECT mark: deep teal #194C57 with the logo's red/blue accents. */

:root{
  --brand:#194c57;
  --brand-deep:#0f2e36;
  --brand-soft:#2b6b78;
  --tint:#eaf1f2;
  --tint-2:#f4f8f8;
  --paper:#ffffff;
  --page:#fbfaf8;
  --ink:#16212a;
  --ink-2:#44555e;
  --ink-3:#6b7b84;
  --line:#e2e6e6;
  --accent:#d8402f;
  --accent-2:#00a0d8;
  --radius:14px;
  --radius-sm:9px;
  --maxw:1140px;
  --measure:40rem;      /* one reading width: heading, lineage panel and body text all use it */
  --shadow:0 1px 2px rgba(16,40,48,.05), 0 8px 28px -12px rgba(16,40,48,.18);
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua",Georgia,"Times New Roman",serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue","Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}
body{
  margin:0;background:var(--page);color:var(--ink);
  font-family:var(--sans);font-size:17px;line-height:1.68;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--accent)}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.22;letter-spacing:-.01em;color:var(--brand-deep);margin:0}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
hr{border:0;border-top:1px solid var(--line);margin:2.5rem 0}

.wrap{width:min(100% - 2.5rem,var(--maxw));margin-inline:auto}
.wrap-narrow{width:min(100% - 2.5rem,780px);margin-inline:auto}
/* every child spans the column, so text and canvas share one left and right edge */
.wrap-measure{width:min(100% - 2.5rem,var(--measure));margin-inline:auto}
.section{padding:clamp(3rem,7vw,5.5rem) 0}
.section--tint{background:var(--tint-2);border-block:1px solid var(--line)}
.eyebrow{
  font-family:var(--sans);font-size:.74rem;font-weight:700;letter-spacing:.16em;
  text-transform:uppercase;color:var(--brand-soft);margin:0 0 .85rem
}
/* the group labels on Members: same label, twice the size */
.eyebrow--lg{font-size:1.48rem;letter-spacing:.1em;margin-bottom:1.3rem}

.section-title{font-size:clamp(1.7rem,3.4vw,2.35rem);margin-bottom:1rem}
.lede{font-size:1.06rem;color:var(--ink-2);max-width:var(--measure)}
.skip{position:absolute;left:-9999px}
.skip:focus{left:1rem;top:1rem;z-index:100;background:#fff;padding:.6rem 1rem;border-radius:8px}
:focus-visible{outline:2.5px solid var(--accent-2);outline-offset:3px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)
}
.site-header .wrap{display:flex;align-items:center;gap:1.5rem;min-height:68px}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none;margin-right:auto}
.brand img{height:30px;width:auto}
.brand b{font-family:var(--serif);font-size:1.06rem;color:var(--brand-deep);font-weight:600;letter-spacing:-.01em}
.brand span{display:block;font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);font-family:var(--sans)}
.nav{display:flex;gap:.3rem;align-items:center}
.nav a{
  font-size:.92rem;font-weight:500;color:var(--ink-2);text-decoration:none;
  padding:.5rem .8rem;border-radius:8px
}
.nav a:hover{background:var(--tint);color:var(--brand-deep)}
.nav a[aria-current="page"]{color:var(--brand-deep);font-weight:650;background:var(--tint)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:9px;padding:.45rem .6rem;cursor:pointer}
.nav-toggle svg{display:block;width:20px;height:20px;stroke:var(--brand-deep);fill:none;stroke-width:1.9}

/* ---------- hero ---------- */
/* flat brand colour behind the hero — the only thing moving on it is the bacterial field */
.hero{position:relative;color:#fff;background:var(--brand-deep);overflow:hidden}
.hero > .wrap{position:relative;z-index:1;padding:clamp(3.4rem,9vw,6.4rem) 0}
.hero-logo{height:clamp(46px,7vw,64px);width:auto;margin-bottom:1.6rem}
.hero h1{color:#fff;font-size:clamp(2.1rem,5.2vw,3.5rem);margin-bottom:.5rem}
.hero .pect{font-size:clamp(1rem,2.1vw,1.3rem);color:#cfe3e6;font-family:var(--serif);margin-bottom:1.5rem}
.hero .pect b{color:#fff;font-weight:600;letter-spacing:.04em}
.hero .pect .sep{color:rgba(255,255,255,.32);font-weight:400;margin:0 .62em}
.hero .affil{font-size:.95rem;color:#b9d2d6;max-width:56ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:2rem}

.btn{
  display:inline-flex;align-items:center;gap:.45rem;font-family:var(--sans);
  font-size:.93rem;font-weight:600;padding:.72rem 1.25rem;border-radius:999px;
  text-decoration:none;border:1.5px solid transparent;transition:transform .12s ease,background .15s ease
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:#fff;color:var(--brand-deep)}
.btn-primary:hover{background:var(--tint);color:var(--brand-deep)}
.btn-ghost{border-color:rgba(255,255,255,.45);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-solid{background:var(--brand);color:#fff}
.btn-solid:hover{background:var(--brand-deep);color:#fff}
.btn-line{border-color:var(--line);color:var(--brand-deep);background:var(--paper)}
.btn-line:hover{border-color:var(--brand-soft);color:var(--brand-deep)}

/* page head (inner pages) */
.page-head{background:var(--brand-deep);color:#fff;padding:clamp(2.6rem,6vw,4rem) 0}
.page-head h1{color:#fff;font-size:clamp(1.9rem,4.4vw,2.9rem)}
.page-head .eyebrow{color:#8fb8bf}
.page-head p{color:#c3d8db;margin-top:.9rem;max-width:66ch}

/* ---------- cards / features ---------- */
/* Research topics, stacked: label, heading, text, figure — all on one reading width,
   left edge shared with the page title. */
.topic{max-width:var(--measure)}
.topic + .topic{margin-top:clamp(2.6rem,6vw,4.2rem)}
.topic h3{font-size:clamp(1.3rem,2.6vw,1.65rem);margin-bottom:.85rem}
.topic p{color:var(--ink-2)}
.topic-media{margin:1.1rem 0 1.5rem}
.topic-media img{display:block;width:100%;height:auto;border-radius:var(--radius);
  border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}

/* the earlier two-column layout — no longer emitted, kept in case it is wanted back */
.feature{display:grid;gap:clamp(1.6rem,4vw,3rem);align-items:center}
@media(min-width:860px){
  .feature{grid-template-columns:1fr 1fr}
  .feature--flip .feature-media{order:2}
}
.feature + .feature{margin-top:clamp(3rem,6vw,4.5rem)}
.feature-media img{border-radius:var(--radius);border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
.feature h3{font-size:clamp(1.3rem,2.6vw,1.65rem);margin-bottom:.85rem}
.feature p{color:var(--ink-2)}

.card-grid{display:grid;gap:1.25rem;grid-template-columns:repeat(auto-fit,minmax(min(100%,290px),1fr))}
.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:1.5rem 1.5rem 1.6rem;box-shadow:var(--shadow)
}
.card h3{font-size:1.18rem;margin-bottom:.6rem}
.card p{color:var(--ink-2);font-size:.96rem}
.card-link{text-decoration:none;display:block;transition:transform .14s ease,border-color .14s ease}
.card-link:hover{transform:translateY(-2px);border-color:var(--brand-soft)}

/* ---------- publications ---------- */
.pub-tools{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;margin-bottom:2rem}
.chip{
  font:inherit;font-size:.85rem;font-weight:600;padding:.4rem .85rem;border-radius:999px;
  border:1px solid var(--line);background:var(--paper);color:var(--ink-2);cursor:pointer
}
.chip:hover{border-color:var(--brand-soft);color:var(--brand-deep)}
.chip[aria-pressed="true"]{background:var(--brand);border-color:var(--brand);color:#fff}
.year-block{margin-bottom:2.6rem}
.year-head{
  display:flex;align-items:center;gap:1rem;margin-bottom:1.1rem;
  font-family:var(--serif);font-size:1.5rem;color:var(--brand-deep)
}
.year-head::after{content:"";flex:1;height:1px;background:var(--line)}
.pub{padding:1.1rem 0 1.25rem;border-bottom:1px solid var(--line)}
.pub:last-child{border-bottom:0}
.pub-title{font-family:var(--serif);font-size:1.12rem;line-height:1.4;margin:0 0 .4rem;color:var(--brand-deep)}
.pub-title a{color:inherit;text-decoration:none;border-bottom:1px solid rgba(25,76,87,.25)}
.pub-title a:hover{color:var(--accent);border-color:currentColor}
.pub-authors{font-size:.94rem;color:var(--ink-2);margin:0 0 .3rem}
.pub-authors .me{color:var(--brand-deep);font-weight:700}
.pub-meta{font-size:.9rem;color:var(--ink-3);margin:0}
.pub-meta .journal{font-style:italic;color:var(--ink-2)}
.pub-foot{font-size:.84rem;color:var(--ink-3);margin-top:.3rem}
.badge{
  display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  padding:.18rem .55rem;border-radius:999px;vertical-align:.14em;margin-right:.45rem
}
.badge--out{background:var(--accent);color:#fff}
.badge--spec{background:var(--tint);color:var(--brand);border:1px solid #cfe0e3}
.pub-note{
  margin-top:.75rem;padding:.85rem 1.1rem;background:var(--tint-2);
  border-left:3px solid var(--brand-soft);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-size:.93rem;color:var(--ink-2)
}
.legend{font-size:.9rem;color:var(--ink-3);display:flex;flex-wrap:wrap;gap:1.2rem;margin-bottom:1.8rem}

/* ---------- members ---------- */
.banner img{width:100%;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow)}
.pi-card{display:grid;gap:clamp(1.4rem,4vw,2.6rem);align-items:start}
@media(min-width:760px){.pi-card{grid-template-columns:260px 1fr}}
.pi-card img{border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow)}
.pi-name{font-size:1.5rem;margin-bottom:.25rem}
.pi-role{color:var(--brand-soft);font-weight:600;font-size:.95rem;margin-bottom:1.3rem}
.deflist{margin:0 0 1.3rem}
.deflist dt{
  font-size:.74rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand-soft);margin-bottom:.35rem
}
.deflist dd{margin:0 0 .15rem;font-size:.95rem;color:var(--ink-2)}
.deflist dd span{color:var(--ink-3);font-variant-numeric:tabular-nums;margin-right:.5rem}

/* every person — PI, postdocs, graduate students — uses this one block */
.pi-card + .pi-card{margin-top:clamp(2.2rem,5vw,3.4rem);padding-top:clamp(2.2rem,5vw,3.4rem);
  border-top:1px solid var(--line)}
.pi-name .kr{font-size:1rem;color:var(--ink-3);font-family:var(--sans);font-weight:400}
.member-ph{display:grid;place-items:center;aspect-ratio:1;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--tint);color:var(--brand-soft);
  font-family:var(--serif);font-size:4rem;line-height:1}

.member-grid{display:grid;gap:1.4rem;grid-template-columns:repeat(auto-fill,minmax(min(100%,215px),1fr))}
.member{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.member img{aspect-ratio:1;object-fit:cover;width:100%}
.member .body{padding:1rem 1.1rem 1.2rem}
.member h3{font-size:1.02rem;margin-bottom:.1rem}
.member .kr{font-size:.86rem;color:var(--ink-3);font-family:var(--sans)}
.member .role{font-size:.8rem;color:var(--brand-soft);font-weight:600;margin:.5rem 0 .55rem}
.member p{font-size:.86rem;color:var(--ink-2);line-height:1.55}
.member a{font-size:.82rem;word-break:break-all}
.join-card{
  border:1.5px dashed #c6d4d7;background:var(--tint-2);border-radius:var(--radius);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:2rem 1.2rem;color:var(--ink-2)
}
.join-card b{font-family:var(--serif);font-size:1.1rem;color:var(--brand-deep);display:block;margin-bottom:.4rem}

/* ---------- contact ---------- */
.contact-grid{display:grid;gap:2rem}
@media(min-width:800px){.contact-grid{grid-template-columns:1fr 1fr}}
.contact-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:1.7rem;box-shadow:var(--shadow)}
.contact-card a.mail{font-size:1.1rem;font-weight:600}
.project{border-left:3px solid var(--brand-soft);padding:.2rem 0 .2rem 1.1rem;margin-bottom:1.5rem}
.project b{display:block;font-family:var(--serif);font-size:1.05rem;color:var(--brand-deep);margin-bottom:.3rem}
.project p{font-size:.94rem;color:var(--ink-2)}
.tag{display:inline-block;font-size:.7rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  padding:.16rem .5rem;border-radius:999px;background:var(--tint);color:var(--brand);margin-left:.4rem;vertical-align:.1em}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-deep);color:#b9d2d6;padding:3rem 0 2.2rem;margin-top:0}
.site-footer a{color:#dcecef}
.site-footer .cols{display:grid;gap:2rem;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr))}
.site-footer img{height:34px;width:auto;margin-bottom:1rem}
.site-footer h4{color:#fff;font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;font-family:var(--sans);margin-bottom:.7rem}
.site-footer p,.site-footer li{font-size:.9rem;line-height:1.6}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:.3rem}
.colophon{border-top:1px solid rgba(255,255,255,.14);margin-top:2.4rem;padding-top:1.4rem;font-size:.82rem;color:#8fb0b6;display:flex;flex-wrap:wrap;gap:.6rem 1.5rem;justify-content:space-between}
.site-footer--slim{padding:1.5rem 0}
.site-footer--slim .colophon{border-top:0;margin-top:0;padding-top:0;justify-content:center}

@media(max-width:780px){
  body{font-size:16px}
  .nav{
    display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;
    background:#fff;border-bottom:1px solid var(--line);padding:.6rem 1.25rem 1rem;gap:.1rem
  }
  .nav.open{display:flex}
  .nav-toggle{display:block}
}
/* ---------- motion ----------
   Three quiet pieces: a living bacterial field in the hero, a substitution
   strip on the research page, and a short rise when a section scrolls in.
   All of it switches off under prefers-reduced-motion. */

/* three layers in the hero: lineage history, a veil that keeps the left quiet,
   then the living population on top */
.hero-lineage{
  position:absolute;inset:0;width:100%;height:100%;
  z-index:1;pointer-events:none;opacity:0;transition:opacity 1.8s ease .2s
}
.hero-lineage.ready{opacity:.46}   /* the history stays behind the population — raise to bring it forward */
.hero-veil{
  position:absolute;inset:0;z-index:2;pointer-events:none;
  background:linear-gradient(95deg,rgba(15,46,54,.94) 0%,rgba(15,46,54,.74) 30%,
             rgba(15,46,54,.26) 62%,rgba(15,46,54,0) 86%)
}
.hero-canvas{
  position:absolute;inset:0;width:100%;height:100%;
  z-index:3;pointer-events:none;opacity:0;transition:opacity 1.4s ease .3s
}
.hero-canvas.ready{opacity:1}
.hero > .wrap{z-index:4}

/* hero copy settles in once, on load */
.hero-in > *{opacity:0;transform:translateY(12px);animation:riseIn .85s cubic-bezier(.2,.65,.3,1) forwards}
.hero-in > *:nth-child(1){animation-delay:.05s}
.hero-in > *:nth-child(2){animation-delay:.16s}
.hero-in > *:nth-child(3){animation-delay:.25s}
.hero-in > *:nth-child(4){animation-delay:.34s}
.hero-in > *:nth-child(5){animation-delay:.43s}
@keyframes riseIn{to{opacity:1;transform:none}}

/* sections rise a little as they enter the viewport.
   Only hidden when scripting is on — without JS the content is simply there. */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.65,.3,1)}
.js .reveal.in{opacity:1;transform:none}

/* substitution strip: a residue track where sites occasionally change */
.subst{margin:0 0 clamp(2rem,5vw,3.2rem)}
.sweep{display:block;width:100%;height:95px;margin:0 0 .7rem}

/* The lineage sits between the heading and the body text, exactly as wide as the
   column they share — a figure in the argument, not a full-bleed stripe. */
.lineage-band{background:var(--brand-deep);overflow:hidden;line-height:0;border-radius:6px;
  margin:clamp(1.5rem,3.4vw,2.3rem) 0}
.lineage{display:block;width:100%;height:clamp(170px,22vw,260px);
  opacity:0;transition:opacity 1.8s ease .2s}
.lineage.ready{opacity:1}   /* lower toward .5 for a fainter lineage */
.subst-track{
  display:flex;gap:2px;align-items:flex-end;height:34px;
  padding:0;margin:0 0 .6rem;list-style:none;overflow:hidden
}
.subst-track li{
  flex:1 1 0;min-width:1px;height:12px;border-radius:1px;background:#d7e3e5;
  transform-origin:bottom center;
  transition:height .36s cubic-bezier(.2,.8,.3,1),background-color .36s ease,opacity .36s ease
}
.subst-track li.sel{height:30px;background:var(--accent)}
.subst-track li.near{height:20px;background:#9ab9bf}
.subst-cap{font-size:.78rem;color:var(--ink-3);letter-spacing:.02em;margin:0}

.arrow{display:inline-block;transition:transform .18s ease}
.card-link:hover .arrow{transform:translateX(4px)}

@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
  .hero-in > *{opacity:1;transform:none}
  .hero-canvas{opacity:1}
}
@media print{
  .site-header,.hero-actions,.pub-tools,.site-footer,.nav-toggle{display:none}
  body{background:#fff;font-size:11pt}
  .pub{break-inside:avoid}
}