:root{--ink:#202832;--navy:#17364b;--blue:#52799a;--muted:#747b82;--line:#e1e5e7;--paper:#fff;--soft:#f7f9fa;--sans:"Inter", Arial, sans-serif;--serif:"Newsreader", Georgia, serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:20px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:12px;top:12px;z-index:30;padding:8px 12px;background:var(--navy);color:#fff}.site-header,.home,.site-footer{width:min(780px,calc(100% - 40px));margin-inline:auto}.site-header{padding-top:62px}.identity{display:flex;align-items:center;gap:28px;padding-bottom:30px}.identity img{width:134px;height:134px;border:1px solid #dfe4e6;border-radius:50%;object-fit:cover;object-position:center top}.identity h1{margin:0 0 6px;color:#111920;font-family:var(--serif);font-size:2.05rem;font-weight:700;line-height:1.05;letter-spacing:-.025em}.identity .affiliation{white-space:nowrap}.identity p{margin:2px 0;color:var(--muted)}.identity .name-korean{color:var(--blue);font-family:var(--sans);font-size:.48em;font-weight:500;letter-spacing:0;white-space:nowrap}.contact-icons{display:flex;gap:9px;margin-top:15px}.contact-icons a{display:inline-flex;width:32px;height:32px;align-items:center;justify-content:center;border:1px solid #cbd7de;border-radius:50%;background:linear-gradient(180deg,#fff 0%,#f6f9fb 100%);box-shadow:0 2px 7px rgba(22,43,58,7%);color:#315f78;font-size:.74rem;font-weight:700;line-height:1;text-decoration:none;transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease,border-color .16s ease,color .16s ease}.contact-icons a:hover{transform:translateY(-2px);border-color:#6f98ae;background:#315f78;box-shadow:0 5px 12px rgba(31,73,95,.18);color:#fff;text-decoration:none}.contact-icons a:focus-visible{outline:2px solid #7da7bb;outline-offset:3px}.contact-icons svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.contact-icons .github-icon,.contact-icons .researchgate-icon{font-size:.6rem;letter-spacing:-.025em}.contact-icons .linkedin-icon{font-family:Arial,sans-serif;font-size:.78rem;font-weight:700}.site-nav{display:flex;align-items:center;gap:26px;padding:14px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.site-nav a{color:#4d5861;font-size:.8rem}.site-nav a:hover{color:var(--blue);text-decoration:none}.site-nav .cv-link{margin-left:auto;color:var(--navy);font-weight:600}.nav-toggle{display:none}.introduction{padding:29px 0 30px;font-size:.93rem;line-height:1.75}.introduction p{margin:0 0 14px}.introduction p:last-child{margin-bottom:0}.content-section{padding-top:31px}.content-section h2{margin:0 0 21px;padding-bottom:9px;border-bottom:1px solid var(--line);color:var(--navy);font-size:.72rem;font-weight:600;letter-spacing:.13em;text-transform:uppercase}.timeline article{display:grid;grid-template-columns:135px 1fr;gap:22px;padding:10px 0 13px}.period{margin:0;color:var(--muted);font-size:.79rem}.timeline h3{margin:-3px 0 2px;color:#26323b;font-size:.9rem;font-weight:600}.timeline article div p{margin:0;color:var(--muted);font-size:.81rem}.research-items{display:grid;grid-template-columns:1fr 1fr;column-gap:38px;row-gap:2px}.research-items article{padding:10px 0 15px;border-bottom:1px solid #edf0f1}.research-items h3{margin:0 0 4px;color:#26323b;font-size:.88rem;font-weight:600}.research-items p{margin:0;color:var(--muted);font-size:.78rem;line-height:1.55}.year-heading{margin:24px 0 9px;color:var(--blue);font-size:.87rem;font-weight:600}.publication{position:relative;margin-left:28px;padding:7px 0 11px}.publication::before{content:"";position:absolute;left:-20px;top:17px;width:4px;height:4px;border-radius:50%;background:#a9b7c0}.publication p{margin:0}.paper-title{color:#202a32;font-size:.86rem;font-weight:500;line-height:1.45}.paper-title a{color:inherit;text-decoration:none}.paper-title a:hover{color:var(--blue);text-decoration:underline}.authors{color:var(--muted);font-size:.76rem}.paper-meta{color:#48555f;font-size:.75rem}.indexing{margin-left:8px;color:var(--muted);font-style:normal;font-weight:400}.simple-list article{display:grid;grid-template-columns:1fr 145px;gap:25px;padding:9px 0 11px}.simple-list p{margin:0;font-size:.84rem;font-weight:500}.simple-list p span{display:block;color:var(--muted);font-size:.76rem;font-weight:400}.simple-list time{color:var(--muted);font-size:.76rem;text-align:right}.teaching article{grid-template-columns:minmax(0,1fr)max-content}.teaching time{white-space:nowrap}.section-copy{margin:0;line-height:1.7}.section-copy a{margin-left:4px}.contact p{margin:6px 0}.contact strong{display:inline-block;width:70px;color:var(--navy);font-size:.73rem;letter-spacing:.04em}.profiles{padding-left:74px}.site-footer{margin-top:45px;padding:18px 0 45px;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:var(--muted);font-size:.68rem}.site-footer p{margin:0}@media(max-width:680px){.site-header{padding-top:35px}.identity{gap:20px}.identity img{width:106px;height:106px}.identity h1{font-size:1.8rem}.identity p{font-size:.76rem}.identity .affiliation{white-space:normal}.nav-toggle{display:block;width:100%;padding:11px 0;border:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:0 0;color:var(--navy);font:600 .73rem var(--sans);text-align:left}.site-nav{display:none;padding:15px 0;border-top:0;flex-wrap:wrap;gap:14px 22px}.site-nav.is-open{display:flex}.site-nav .cv-link{margin-left:0}.timeline article{grid-template-columns:105px 1fr;gap:15px}.research-items{grid-template-columns:1fr}.simple-list article{grid-template-columns:1fr;gap:1px}.simple-list time{text-align:left}.profiles{padding-left:0}.site-footer{flex-direction:column;gap:5px}}