:root{
  --ink:#111;
  --muted:#5b5b5b;
  --faint:#858585;
  --line:#d7d7d7;
  --soft:#f5f5f5;
  --paper:#fff;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,"Noto Sans KR",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:7rem}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font);font-size:1rem;line-height:1.72;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration-color:#8c8c8c;text-decoration-thickness:1px;text-underline-offset:.25em}
a:hover{text-decoration-color:var(--ink)}
a:focus-visible{outline:2px solid var(--ink);outline-offset:4px}
.skip-link{position:fixed;z-index:20;left:1rem;top:-10rem;padding:.55rem .9rem;background:#111;color:#fff}
.skip-link:focus{top:1rem}

.site-header{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}
.header-inner{width:min(1120px,calc(100% - 3rem));min-height:76px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:2rem}
.brand{display:inline-flex;align-items:center;gap:.8rem;text-decoration:none;white-space:nowrap}
.monogram{width:34px;height:34px;border:1px solid var(--ink);display:grid;place-items:center;font-size:.72rem;font-weight:750;letter-spacing:.06em}
.brand strong{display:block;font-size:.95rem;line-height:1.2;letter-spacing:-.01em}
.brand small{display:block;margin-top:.2rem;color:var(--muted);font-size:.72rem;line-height:1.2}
.navigation{display:flex;align-items:center;gap:1.65rem}
.navigation a{font-size:.84rem;font-weight:500;text-decoration:none;color:#333}
.navigation a:hover{text-decoration:underline;text-underline-offset:.4em}

main,.site-footer{width:min(1040px,calc(100% - 3rem));margin:0 auto}
.intro{min-height:520px;padding:6rem 0 5rem;display:grid;grid-template-columns:minmax(0,1fr) 230px;align-items:center;gap:clamp(3rem,8vw,7.5rem);border-bottom:1px solid var(--ink)}
.kicker{margin:0 0 1.35rem;color:var(--muted);font-size:.76rem;font-weight:650;letter-spacing:.13em;text-transform:uppercase}
h1{margin:0;font-size:clamp(2.65rem,5.4vw,4.6rem);font-weight:610;line-height:1.04;letter-spacing:-.055em}
h1 span{display:block;margin-top:.75rem;color:var(--muted);font-size:1.05rem;font-weight:450;letter-spacing:.08em}
.role{margin:1.8rem 0 0;color:#333;font-size:.98rem;line-height:1.65}
.lead{max-width:620px;margin:1.75rem 0 0;font-size:clamp(1.25rem,2.1vw,1.62rem);font-weight:420;line-height:1.5;letter-spacing:-.02em}
.profile-links{display:flex;flex-wrap:wrap;gap:.8rem 1.35rem;margin-top:1.75rem}
.profile-links a,.contact-links a{font-size:.86rem;font-weight:550}
.portrait{display:block;width:100%;height:auto;aspect-ratio:3/4;object-fit:cover;border:1px solid #c8c8c8;background:#ddd}

.section{display:grid;grid-template-columns:180px minmax(0,1fr);gap:clamp(2rem,5vw,5rem);padding:4.7rem 0;border-bottom:1px solid var(--line);scroll-margin-top:5.5rem}
.section-label{align-self:start;position:sticky;top:7.3rem}
.section-label span{display:block;margin-bottom:.65rem;color:var(--faint);font-size:.68rem;font-weight:650;letter-spacing:.12em}
h2{margin:0;font-size:1rem;font-weight:650;line-height:1.4;letter-spacing:-.01em}
.section-content{min-width:0}
.prose>p:first-child{margin-top:0;font-size:1.12rem;color:#2d2d2d}
p{margin:.65rem 0;color:var(--muted)}
strong{font-weight:650;color:var(--ink)}
.research-statement{margin-top:2rem;padding:1.25rem 0 0;border-top:1px solid var(--ink)}
.research-statement h3{margin:0 0 .5rem;font-size:.8rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}
.research-statement p{margin:0;color:#333}

.research-showcase{min-width:0}
.research-feature{padding-top:1.6rem;border-top:1px solid var(--ink)}
.research-eyebrow{margin:0;color:var(--faint);font-size:.75rem;font-weight:700;line-height:1.45;letter-spacing:.075em;text-transform:uppercase}
.research-feature h3{margin:.55rem 0 0;color:var(--ink);font-size:clamp(1.55rem,3vw,2.05rem);font-weight:610;line-height:1.25;letter-spacing:-.035em}
.feature-description{max-width:710px;margin:.85rem 0 0;color:#3f3f3f;font-size:1rem;line-height:1.72}
.research-visual{display:block;margin:1.45rem 0 0;border:1px solid #e1e1e1;background:#fff;text-decoration:none;overflow:hidden}
.research-visual img{display:block;width:100%;height:auto}
.feature-visual img{aspect-ratio:1600/760;object-fit:contain}
.research-visual:hover{border-color:#aaa}
.research-visual:focus-visible{outline:2px solid var(--ink);outline-offset:4px}
.research-links{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem 1.15rem;margin-top:1rem}
.research-links span{color:var(--faint);font-size:.75rem;font-weight:650;letter-spacing:.06em;text-transform:uppercase}
.research-links a,.paper-link{font-size:.8rem;font-weight:600;text-decoration:none;border-bottom:1px solid #a0a0a0}
.research-links a:hover,.paper-link:hover{border-color:var(--ink)}
.project-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.3rem;margin-top:3.5rem}
.project-card{min-width:0;padding-top:1.2rem;border-top:1px solid var(--line)}
.project-card .research-visual{margin:0 0 1.15rem}
.project-card .research-visual img{aspect-ratio:4/3;object-fit:contain}
.project-card h3,.timeline-item h3{margin:0;color:var(--ink);font-size:1.02rem;font-weight:650;line-height:1.45;letter-spacing:-.015em}
.project-card>p:last-child{margin:.5rem 0 0;font-size:.86rem;line-height:1.65}

.section-intro{margin:0 0 2rem;font-size:.94rem}
.publications{list-style:none;padding:0;margin:0;border-top:1px solid var(--ink)}
.publication{display:grid;grid-template-columns:5.4rem minmax(0,1fr);gap:1.3rem;padding:1.65rem 0;border-bottom:1px solid var(--line)}
.publication:last-child{border-bottom:0;padding-bottom:0}
.publication-meta{display:flex;flex-direction:column;gap:.18rem}
.year{font-size:.94rem;font-weight:650;font-variant-numeric:tabular-nums}
.type{color:var(--faint);font-size:.7rem;letter-spacing:.04em;text-transform:uppercase}
.publication h3{margin:0;font-size:1.02rem;font-weight:630;line-height:1.5;letter-spacing:-.012em}
.publication h3 a{text-decoration:none}
.publication h3 a:hover{text-decoration:underline}
.authors,.venue{font-size:.84rem;line-height:1.62}
.authors{margin:.45rem 0 .12rem}
.venue{margin:.12rem 0 .55rem;font-style:italic}

.timeline{border-top:1px solid var(--ink)}
.timeline-item{display:grid;grid-template-columns:8.5rem minmax(0,1fr);gap:1.25rem;padding:1.3rem 0;border-bottom:1px solid var(--line)}
.timeline-date{margin:0;padding-top:.08rem;color:var(--muted);font-size:.82rem;font-variant-numeric:tabular-nums}
.timeline-item p:not(.timeline-date){margin:.22rem 0 0;font-size:.92rem;line-height:1.65}
.background-group+.background-group{margin-top:2.6rem}
.background-heading{margin:0 0 .75rem;color:var(--ink);font-size:.78rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase}
.contact .section-content>p:first-child{margin-top:0}
.email-link{font-weight:600}
.contact-links{display:flex;flex-wrap:wrap;gap:1rem 1.5rem;margin-top:1.5rem}

.site-footer{padding:1.5rem 0 2.5rem;display:flex;justify-content:space-between;gap:1rem;color:var(--faint);font-size:.76rem}
.site-footer a{text-decoration:none}

@media(max-width:780px){
  html{scroll-padding-top:1rem}
  .site-header{position:relative}
  .header-inner{width:min(100% - 2rem,1040px);padding:1rem 0;align-items:flex-start;flex-direction:column;gap:.9rem}
  .navigation{width:100%;gap:.55rem 1.2rem;flex-wrap:wrap}
  .navigation a{min-height:32px;display:flex;align-items:center}
  main,.site-footer{width:min(100% - 2rem,1040px)}
  .intro{min-height:0;padding:3.5rem 0;grid-template-columns:minmax(0,1fr) 140px;gap:2rem;align-items:start}
  h1{font-size:clamp(2.45rem,10vw,3.5rem)}
  .section{grid-template-columns:1fr;gap:1.5rem;padding:3.5rem 0;scroll-margin-top:1rem}
  .section-label{position:static;display:flex;align-items:baseline;gap:.8rem}
  .section-label span{margin:0}
  .project-grid{gap:1rem}
}
@media(max-width:560px){
  .intro{padding:2.8rem 0 3.2rem;grid-template-columns:minmax(0,1fr) 92px;gap:1rem;align-items:start}
  .intro-copy{display:contents}
  .kicker{grid-column:1/-1;margin-bottom:.4rem}
  h1{grid-column:1;font-size:2.3rem}
  h1 span{font-size:.9rem}
  .portrait{grid-column:2;grid-row:2 / span 2}
  .role{grid-column:1;font-size:.9rem;margin-top:.3rem}
  .lead,.profile-links{grid-column:1/-1}
  .lead{font-size:1.18rem;margin-top:.8rem}
  .profile-links{margin-top:.25rem}
  .publication{grid-template-columns:1fr;gap:.55rem}
  .publication-meta{flex-direction:row;align-items:center;gap:.75rem}
  .timeline-item{grid-template-columns:1fr;gap:.25rem}
  .research-feature{padding-top:1.35rem}
  .feature-description{font-size:.96rem}
  .research-links{align-items:flex-start}
  .research-links span{flex-basis:100%}
  .project-grid{grid-template-columns:1fr;gap:2rem;margin-top:2.8rem}
  .project-card{padding-top:1rem}
  .project-card .research-visual{margin-bottom:1.1rem}
  .project-card>p:last-child{font-size:.9rem}
  .site-footer{padding-bottom:2rem}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{
  .site-header,.skip-link,.profile-links,.contact-links,.site-footer{display:none}
  main{width:100%}
  .intro{min-height:0;padding:0 0 18pt;grid-template-columns:1fr 90pt;gap:20pt}
  .section{grid-template-columns:95pt 1fr;gap:18pt;padding:16pt 0;break-inside:auto}
  .section-label{position:static}
  .research-feature,.project-card,.publication,.timeline-item{break-inside:avoid}
  body{font-size:9.5pt}
  h1{font-size:30pt}
  a{color:inherit}
}