@font-face{font-family:'NanumSquare Neo';src:url('assets/fonts/NanumSquareNeo-Variable.woff2') format('woff2');font-weight:100 900;font-style:normal;font-display:swap}
:root{--ink:#0c0a09;--paper:#fafaf9;--card:#fff;--border:#e8e6e5;--muted:#78716c;--soft:#f3f2f0;--accent:#3ba6f1;--accent-text:#126a9c;--wash:#c1e1f7;--sans:'NanumSquare Neo','Apple SD Gothic Neo','Malgun Gothic',system-ui,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink);font:400 16px/1.7 var(--sans);word-break:keep-all;overflow-wrap:break-word}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer}a,button{-webkit-tap-highlight-color:transparent}a:hover{text-decoration:underline;text-underline-offset:5px}button:focus-visible,a:focus-visible{outline:2px solid var(--accent-text);outline-offset:4px}h1,h2,h3,p{margin-top:0}h1,h2,h3,.intro,.section-heading>p,.project>p{text-wrap:balance}h1,h2{font-weight:400;letter-spacing:-.025em;line-height:1.32;margin-bottom:0}h1{font-size:clamp(2.1rem,4.3vw,3.5rem)}h2{font-size:clamp(1.8rem,3.3vw,2.65rem)}h3{font-size:1.35rem;font-weight:500;letter-spacing:-.02em;line-height:1.5;margin-bottom:14px}em{font-style:normal;font-weight:inherit;color:var(--accent-text);background:var(--wash);border-radius:6px;padding:0 .15em .05em;box-decoration-break:clone;-webkit-box-decoration-break:clone}.wrap{width:calc(100% - 80px);max-width:1200px;margin-inline:auto}.skip{position:fixed;top:-100px;left:20px;background:white;padding:12px;z-index:10}.skip:focus{top:10px}
.nav{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--border)}.wordmark{display:inline-flex;align-items:center;gap:10px;font:500 20px/1 var(--sans);letter-spacing:-.025em}.brand-symbol{display:grid;place-items:center;background:var(--ink);color:white;width:28px;height:28px;border-radius:7px;font:500 24px/1 var(--sans)}.nav nav{display:flex;align-items:center;gap:30px}.nav nav a,.nav-contact{display:inline-flex;align-items:center;min-height:44px;font-size:14px;color:var(--muted)}.nav-contact{color:var(--ink)}.eyebrow{margin:0 0 20px;font-size:13px;font-weight:400;color:var(--muted)}.hero{padding-top:52px}.hero-copy{max-width:850px;margin-bottom:40px;animation:enter .65s ease both}.intro{color:var(--muted);font-size:16px;line-height:1.8;max-width:650px;margin:24px 0}.actions{display:flex;gap:12px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:center;gap:16px;min-height:46px;border-radius:9999px;border:1px solid var(--border);padding:10px 20px;font-size:14px;transition:background .18s,transform .18s;white-space:nowrap}.filled{background:var(--accent);border-color:#3398e1;color:var(--ink);font-weight:500}.ghost{background:transparent}.button:hover{text-decoration:none;background:var(--wash)}.button:active{transform:translateY(1px)}
.showcase{border-radius:16px;background:var(--card);box-shadow:0 12px 45px rgba(17,12,46,.1);overflow:hidden;animation:enter .8s ease both}.showcase-top{min-height:66px;padding:12px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:16px}.showcase-top>span{font-size:14px;color:var(--muted)}.view-controls{display:flex;gap:4px}.view-controls button{background:transparent;border:0;border-radius:9999px;padding:10px 16px;min-height:44px;font-size:14px;transition:background .2s}.view-controls button:hover{background:var(--soft)}.view-controls button[aria-pressed=true]{background:#1c1917;color:white}.showcase-body{display:grid;grid-template-columns:minmax(0,2.3fr) minmax(245px,1fr);align-items:center}.project-screen{margin:0;padding:24px;background:#f7f7f6;align-self:stretch;display:flex;flex-direction:column;justify-content:center;min-width:0}.project-screen img{display:block;width:100%;height:auto;aspect-ratio:1.77;object-fit:contain;filter:grayscale(1) contrast(.94)}.project-screen figcaption{font-size:12px;color:var(--muted);margin-top:12px;text-align:center}.showcase-story{padding:30px;min-width:0}.small-label{font-size:13px;color:var(--accent-text)}.showcase-story h2{font-size:26px;margin:18px 0}.showcase-story p{font-size:14px;color:var(--muted);line-height:1.8;text-wrap:balance}.showcase-story dl{font-size:13px;margin:24px 0 12px}.showcase-story dt{color:var(--muted);margin-top:10px}.showcase-story dd{margin:0}.text-link{display:inline-flex;align-items:center;justify-content:flex-start;min-height:44px;padding:8px 0;background:none;border:0;color:var(--ink);font-size:14px;text-align:left;gap:8px}.text-link:hover{color:var(--accent-text);text-decoration:underline;text-underline-offset:5px}
.section{padding-block:88px}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;margin-bottom:40px}.section-heading>p{font-size:16px;color:var(--muted);margin-bottom:2px;max-width:350px}.research{padding-bottom:0}.research-list{border-top:1px solid var(--border)}.research-item{display:grid;grid-template-columns:210px minmax(0,1fr) 90px;gap:32px;padding-block:28px;border-bottom:1px solid var(--border);align-items:start}.research-date{font-size:14px;font-variant-numeric:tabular-nums;padding-top:4px}.research-date>span{display:block;font-size:13px;color:var(--muted);margin-top:8px}.research-item h3{font-size:20px;margin-bottom:10px}.research-item p{font-size:15px;color:var(--muted);margin-bottom:12px;max-width:65ch}.research-tags{font-size:12px;color:var(--accent-text)}.research-tags span{margin-left:16px}.research-source{color:var(--muted);font-size:12px;margin:18px 0 0}
.projects{display:grid;grid-template-columns:1fr 1fr;gap:20px}.project{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:28px;min-width:0}.featured{grid-column:1/-1}.project-top{display:flex;justify-content:space-between;gap:12px;font-size:12px;color:var(--muted);margin-bottom:20px}.project>p,.wide p{font-size:16px;color:var(--muted);line-height:1.8;max-width:750px;margin-bottom:24px}.project-note{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted);margin-bottom:24px}.pipeline{display:flex;align-items:center;gap:16px;margin:0 0 28px}.pipeline>div{flex:1;padding:18px;border:1px solid var(--border);border-radius:6px;font-size:16px}.pipeline span{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}.pipeline b{font-weight:400;color:var(--muted)}.project-foot{margin-top:auto;padding-top:12px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:13px;color:var(--muted)}.wide{grid-column:1/-1;flex-direction:row;justify-content:space-between;gap:36px}.wide p{margin-bottom:0}.wide-side{display:flex;flex-direction:column;justify-content:space-between;align-items:flex-end;font-size:13px;color:var(--muted);min-width:180px}
.about{border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:#f5f4f2}.about-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:100px}.about-copy>p{color:var(--muted);max-width:65ch;text-wrap:pretty}.education{border-top:1px solid var(--border);margin-top:30px;padding-top:24px}.education span,.experience span{font-size:13px;color:var(--muted)}.education h3{margin:10px 0 6px;font-size:20px}.education p{font-size:15px;margin-bottom:8px}.experience h3{font-size:20px;margin-bottom:24px}.experience>div{border-bottom:1px solid var(--border);padding-bottom:18px;margin-bottom:18px}.experience p{font-size:16px;margin:8px 0 0}.credential-list{margin-top:36px}.credential-list>div{display:grid;grid-template-columns:170px 1fr;gap:24px;padding:22px 0;border-bottom:1px solid var(--border)}.credential-list>div>span{font-size:14px;color:var(--muted)}.credential-list p{margin:0;font-size:17px}.credential-list strong{font-weight:500}.credential-list small{display:block;color:var(--muted);font-size:14px;margin-top:5px}.contact{padding-bottom:64px}.contact-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:48px}.contact-card>p:not(.eyebrow){margin:24px 0;color:var(--muted)}.email{font-size:clamp(1rem,2.5vw,1.6rem);color:var(--accent-text);overflow-wrap:anywhere}footer{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-bottom:30px}footer span,footer>a:last-child{font-size:13px;color:var(--muted)}footer>a{min-height:44px;display:inline-flex;align-items:center}
 dialog{width:calc(100% - 32px);max-width:760px;max-height:88dvh;border:1px solid var(--border);border-radius:16px;padding:0;color:var(--ink);background:var(--card)}dialog::backdrop{background:rgba(12,10,9,.5)}.dialog-inner{padding:36px}.close{display:block;margin:0 0 24px auto;min-height:44px;padding:8px 16px;border:1px solid var(--border);border-radius:9999px;background:var(--card);font-size:14px}dialog h2{font-size:30px;margin-bottom:20px}dialog p{font-size:16px;line-height:1.8}dialog dl{display:grid;grid-template-columns:90px minmax(0,1fr);gap:16px;border-top:1px solid var(--border);padding-top:24px;font-size:15px}dialog dt{color:var(--muted)}dialog dd{margin:0}.source-note{color:var(--muted);font-size:12px!important;margin-top:26px}body:has(dialog[open]){overflow:hidden}@keyframes enter{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:1023px){.wrap{width:calc(100% - 48px)}.showcase-body{grid-template-columns:minmax(0,1.8fr) minmax(220px,1fr)}.showcase-story{padding:22px}.showcase-story h2{font-size:23px}.project-screen{padding:16px}.about-grid{gap:48px}.research-item{grid-template-columns:170px minmax(0,1fr);gap:24px}.research-item>button{grid-column:2;margin-top:-20px;justify-self:start}.section{padding-block:64px}.research{padding-bottom:0}.wide{flex-direction:column;gap:24px}.wide-side{flex-direction:row;align-items:center}}
@media(max-width:767px){.hero{padding-top:36px}.hero-copy{margin-bottom:28px}.showcase-body{grid-template-columns:1fr}.showcase-story{border-top:1px solid var(--border)}.showcase-story h2 br{display:none}.showcase-story h2{margin:8px 0 12px}.showcase-story dl{display:none}.showcase-story p{margin-bottom:8px}.showcase-top>span{display:none}.showcase-top{justify-content:center;padding:10px}.section-heading{display:block;margin-bottom:28px}.section-heading>p{margin-top:20px}.projects{grid-template-columns:1fr}.featured,.wide{grid-column:auto}.about-grid{grid-template-columns:1fr;gap:36px}.research-item{grid-template-columns:1fr;gap:12px;padding-block:24px}.research-date{display:flex;align-items:center;gap:20px;font-size:13px}.research-date>span{margin:0}.research-item>button{grid-column:1;margin-top:0}.research-item h3{font-size:19px}.nav nav{gap:20px}.nav-contact{display:none}.nav{min-height:64px}}
@media(max-width:639px){.wrap{width:calc(100% - 36px);padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}.wordmark{font-size:18px;gap:7px}.brand-symbol{width:25px;height:25px;font-size:22px}.nav{gap:12px}.nav nav{gap:14px}.nav nav a{font-size:13px}h1{font-size:clamp(1.85rem,7.6vw,2.65rem);line-height:1.4}.eyebrow{margin-bottom:16px}.intro{font-size:15px;line-height:1.8;margin:20px 0}.intro br{display:none}.actions{gap:8px}.button{font-size:13px;padding:10px 15px;gap:8px}.view-controls button{padding:8px 13px;font-size:13px}.project-screen{padding:12px}.project-screen figcaption{font-size:12px}.showcase-story{padding:22px}.section{padding-block:48px}.research{padding-bottom:0}.section-heading>p{font-size:15px}.project{padding:22px}.project-top{font-size:12px;flex-wrap:wrap}.project-top span:last-child:not(:first-child){display:none}.project-foot{flex-wrap:wrap;gap:4px}.pipeline{flex-direction:column;align-items:stretch;gap:8px}.pipeline>div{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 14px}.pipeline span{margin:0}.pipeline b{display:none}.wide-side{flex-wrap:wrap;gap:8px}.credential-list>div{grid-template-columns:1fr;gap:6px;padding:20px 0}.credential-list p{font-size:16px}.contact-card{padding:30px 24px}.contact-card h2{font-size:28px}.contact{padding-bottom:32px}footer{flex-wrap:wrap;gap:8px 20px}footer .wordmark{font-size:18px}.dialog-inner{padding:24px}dialog h2{font-size:24px}dialog dl{grid-template-columns:1fr;gap:6px}dialog dd{margin-bottom:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}

/* Interaction feedback uses native CSS; touch and reduced-motion remain usable. */
.nav nav a{position:relative;text-decoration:none}
.nav nav a::after{content:'';position:absolute;bottom:7px;left:0;right:0;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.nav nav a:focus-visible::after{transform:scaleX(1)}
.project{transition:transform .22s ease,border-color .22s ease}
.project:focus-within{border-color:var(--accent)}
.text-link,.close,.view-controls button{transition:transform .18s ease,color .18s ease,background-color .18s ease}
.close:hover{background:var(--soft)}
.text-link:active,.close:active,.view-controls button:active{transform:translateY(1px)}
dialog[open]{animation:dialog-enter .24s ease-out}
dialog[open]::backdrop{animation:backdrop-enter .24s ease-out}
@keyframes dialog-enter{from{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:none}}
@keyframes backdrop-enter{from{opacity:0}to{opacity:1}}
@media(hover:hover) and (pointer:fine){
  .nav nav a:hover::after{transform:scaleX(1)}
  .project:hover{transform:translateY(-4px);border-color:var(--accent)}
  .text-link:hover{transform:translateX(4px)}
  .button:hover{transform:translateY(-2px)}
  .button:active{transform:translateY(1px)}
}
@media(prefers-reduced-motion:no-preference){
  @supports(animation-timeline:view()){
    .section-heading,.contact-card{animation:enter linear both;animation-timeline:view();animation-range:entry 0% entry 90%}
  }
}
@media(prefers-reduced-motion:reduce){
  .project:hover,.text-link:hover,.button:hover,.button:active,.text-link:active,.close:active,.view-controls button:active{transform:none}
}
.contact-details{font-style:normal;margin-top:24px;font-size:15px;overflow-wrap:anywhere}.contact-details p{margin:12px 0}.contact-details span{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}.contact-details a{display:inline-flex;align-items:center;min-height:44px}