@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;450;500;550;600&family=Noto+Sans+KR:wght@400;500;600&display=swap');
:root{--paper:#fff;--ink:#202124;--body:#4b4f55;--muted:#62676e;--accent:#315d86;--hero-viewport:max(100svh,480px);--font:'Inter','Noto Sans KR',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}
*{box-sizing:border-box}
html{scroll-padding-top:116px;scroll-behavior:auto}
body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.8 var(--font);-webkit-font-smoothing:antialiased}
p,h1,h2,h3,h4{margin:0}a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}button{font:inherit;cursor:pointer}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
main:focus{outline:none}[hidden]{display:none!important}
.skip{position:fixed;top:12px;left:16px;z-index:100;padding:9px 14px;background:var(--ink);color:#fff;transform:translateY(-180%)}.skip:focus{transform:none}.skip:hover{color:#fff}
.site-header{position:fixed;inset:0 0 auto;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:18px max(5vw,24px);background:#fff}
.site-brand{font-size:17px;font-weight:550;letter-spacing:-.7px;opacity:0;transform:translateY(3px);pointer-events:none;transition:opacity .25s,transform .25s;white-space:nowrap}
.site-header.is-scrolled .site-brand,.site-header:focus-within .site-brand{opacity:1;transform:none;pointer-events:auto}
.topbar,.site-nav,.languages{display:flex;align-items:center}.topbar{gap:25px}.site-nav{gap:26px}
.site-nav a{position:relative;display:inline-flex;align-items:center;min-height:44px;font-size:13px;color:var(--muted)}
.site-nav a::after{content:'';position:absolute;left:0;right:0;bottom:6px;height:1px;background:var(--ink);transform:scaleX(0);transform-origin:left;transition:transform .2s}
.site-nav a[aria-current],.site-nav a:hover{color:var(--ink)}.site-nav a[aria-current]::after,.site-nav a:hover::after{transform:scaleX(1)}
.languages{gap:2px;font-size:10px;color:#a0a0a0}.languages button{border:0;background:none;padding:6px;min-width:34px;min-height:44px;font-size:11px;color:var(--muted);transition:color .15s}.languages button:hover{color:var(--accent)}.languages button[aria-pressed=true]{color:var(--ink);font-weight:500}
/* The only large movement is the opening. Ordinary navigation bypasses it. */
.hero{height:100svh;min-height:480px;position:relative;display:flex;align-items:center;overflow:hidden}
.hero-stage,.hero-wordmark{position:relative;width:100%}.hero-mask{padding:20px 4vw 35px}
h1.hero-name{position:relative;font:550 clamp(58px,15.4vw,238px)/1.1 var(--font);letter-spacing:-.083em;text-align:center;white-space:nowrap;color:var(--ink)}
.hero-period{color:#536d88}
.scroll-cue{position:absolute;bottom:32px;left:max(5vw,24px);display:flex;align-items:center;gap:16px;min-height:44px;font-size:12px;color:var(--muted)}
.scroll-arrow{font-size:19px;color:var(--ink)}
.zoom-ready .hero{height:max(180svh,864px);min-height:0;display:block;overflow:visible;z-index:2;pointer-events:none}
.zoom-ready .hero-stage{position:sticky;top:0;height:var(--hero-viewport);overflow:hidden}
.zoom-ready .hero-stage::before{content:'';position:absolute;inset:0;background:#fff;opacity:var(--veil,1)}
.zoom-ready .hero-mask{position:absolute;inset:0;display:flex;align-items:center;overflow:visible}
/* No forced compositor layer: enlarged type rerasterizes rather than blurring. */
.zoom-ready .hero-wordmark{will-change:auto}
.zoom-ready .scroll-cue{pointer-events:auto;opacity:var(--cue,1)}
.content{max-width:820px;padding:32px 48px 32px;margin:0 auto}
.zoom-ready body[data-page=home] .content{position:relative;z-index:1;margin-top:calc(-1*var(--hero-viewport));padding-top:128px}
.intro{padding-top:0}.affiliation{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:0;font-size:13px;line-height:1.7;color:var(--muted)}
.company::before{content:'·';margin-right:8px}
.intro-lead{font:400 17px/1.85 var(--font);letter-spacing:-.15px;color:var(--body);text-wrap:pretty}
.contact-label{font-size:12px;font-weight:500;line-height:1.4;letter-spacing:0;color:var(--muted);margin-top:21px}
.profile-links{display:flex;align-items:center;flex-wrap:wrap;gap:8px 18px;margin:3px 0 0}.email,.social{display:inline-flex;align-items:center;min-height:40px;color:var(--body);font-size:13px}
.email:hover{text-decoration:underline;text-underline-offset:4px}.socials{display:flex;align-items:center;gap:6px}.social{justify-content:center;min-width:44px;min-height:44px;border-radius:6px}.social:hover{background:#f3f5f7;color:var(--accent)}.social svg{width:18px;height:18px}
#work,#projects,#research,#background{margin-top:48px;padding-top:32px;border-top:1px solid #e2e5e9}
.section-heading{display:flex;align-items:baseline;flex-wrap:wrap;gap:6px 14px;margin-bottom:24px}
h2{font-size:22px;font-weight:550;line-height:1.4;letter-spacing:-.5px}.section-aside{font-size:12px;color:var(--muted)}
article{margin-bottom:25px}article:last-child{margin-bottom:0}h3,.paper-title{font-size:16px;font-weight:500;line-height:1.65;letter-spacing:-.2px}
article p{margin-top:4px;color:var(--body);font-size:14px;line-height:1.85}
.work-patent{font-size:12px;line-height:1.7;color:var(--muted);margin-top:3px}
.papers,.background{list-style:none;padding:0;margin:0}.papers li{margin-bottom:34px}.papers li:last-child{margin-bottom:0}
summary::-webkit-details-marker{display:none}
.paper-detail{padding:7px 0 0}.paper-detail p{font-size:13px;line-height:1.8;color:var(--body)}.authors strong{color:var(--ink);font-weight:500}.paper-detail .venue{color:var(--muted);margin-top:5px}
.background li{position:relative;padding-right:140px;margin-bottom:24px}.background li:last-child{margin-bottom:0}.background strong{font-size:14px;font-weight:500}.background .date{position:absolute;right:0;top:2px;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}.background p{font-size:13px;line-height:1.85;color:var(--body);margin-top:4px}
body:is([data-page=writing],[data-page=post]) .content{padding-top:146px}body:is([data-page=writing],[data-page=post]) .site-brand{opacity:1;transform:none;pointer-events:auto}
#writing{min-height:calc(100svh - 280px)}.writing-heading{display:flex;align-items:baseline;justify-content:space-between;gap:20px}.writing-heading h1{font-size:36px;font-weight:500;line-height:1.3;letter-spacing:-1.2px}.post-count{font-size:12px;color:var(--muted)}.writing-description{font-size:15px;color:var(--body);margin-top:12px}
.empty-writing{padding:54px 0 22px}.empty-writing strong{display:block;font-size:17px;font-weight:450;color:var(--body)}.empty-writing p{font-size:14px;color:var(--muted);margin-top:7px}
.post{display:grid;grid-template-columns:90px minmax(0,1fr);gap:6px 24px;padding:30px 0 4px;min-width:0}.post time{grid-row:1/span 2;color:var(--muted);font-size:12px;padding-top:3px;font-variant-numeric:tabular-nums}.post h3,.post p{grid-column:2;min-width:0;overflow-wrap:anywhere}.post h3{font-size:18px;font-weight:500;line-height:1.5;letter-spacing:-.3px}.post p{font-size:14px;line-height:1.8;color:var(--body);margin:0}.post:hover h3{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}.post+.post{margin-top:22px}
.editor{margin-top:5px}.editor>summary{list-style:none;display:inline-flex;align-items:center;min-height:44px;cursor:pointer;font-size:14px;color:var(--accent)}.editor>summary::before{content:'+';font-size:18px;line-height:1;margin-right:9px}.editor[open]>summary::before{content:'−'}
.draft-form{display:grid;gap:24px;margin-top:24px}label{font-size:13px;color:var(--body)}input,textarea{display:block;width:100%;border:0;border-bottom:1px solid #bdc3ca;border-radius:0;padding:10px 0;margin-top:5px;color:var(--ink);background:transparent;font:16px/1.8 var(--font)}textarea{min-height:280px;resize:vertical}
.draft-actions{display:flex;flex-wrap:wrap;gap:24px}.draft-actions button{border:0;background:none;padding:8px 0;min-height:44px;color:var(--body);font-size:13px;text-decoration:underline;text-underline-offset:4px}.draft-actions button:first-child{color:var(--accent)}.draft-note{font-size:13px;line-height:1.85;color:var(--muted)}
footer{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:72px;color:var(--muted);font-size:12px}footer a{display:inline-flex;align-items:center;min-height:44px}
.motion-ready .reveal{transition:opacity .5s ease,transform .5s cubic-bezier(.2,.65,.3,1)}.motion-ready .reveal:not(.is-visible){opacity:0;transform:translateY(12px)}
html[lang=ko] p,html[lang=ko] li{word-break:keep-all;overflow-wrap:anywhere}
@media(max-width:760px){
 .site-header{padding:16px 28px}.topbar{gap:20px}.site-nav{gap:22px}.content{padding:30px 32px}
 .background li{padding-right:0}.background .date{position:static;display:block;margin-top:2px}
}
@media(max-width:560px){
 html{scroll-padding-top:98px}.site-header{padding:10px 22px;gap:14px}.site-brand{font-size:14px;letter-spacing:-.5px}.topbar{gap:12px}.site-nav{gap:18px}.site-nav a{font-size:12px}.languages{gap:0}.languages button{font-size:11px;padding-inline:5px;min-width:31px}
 h1.hero-name{font-size:15.4vw}.hero-mask{padding:10px 3vw 25px}.scroll-cue{bottom:25px;left:25px;font-size:11px;gap:14px}
 .content{padding:24px 25px}.zoom-ready body[data-page=home] .content{padding-top:108px}
 .affiliation{font-size:12px;margin-bottom:0}.intro-lead{font-size:15px;line-height:1.9;letter-spacing:-.1px}
 .contact-label{font-size:11px;margin-top:18px}.profile-links{gap:4px 14px;margin-top:2px}.email,.social{font-size:12px}.socials{gap:6px}
 #work,#projects,#research,#background{margin-top:36px;padding-top:24px}.section-heading{margin-bottom:24px}h2{font-size:20px}.section-aside{font-size:12px}h3,.paper-title{font-size:15px}article p{font-size:14px}.work-patent{font-size:12px}.paper-detail p{font-size:13px;line-height:1.8}.papers li{margin-bottom:32px}
 body:is([data-page=writing],[data-page=post]) .content{padding-top:116px}.writing-heading h1{font-size:32px}.empty-writing{padding-top:42px}.writing-description{font-size:14px}.post{grid-template-columns:1fr;gap:7px;padding-top:28px}.post h3{font-size:17px}.post time{grid-row:auto}.post h3,.post p{grid-column:1}footer{padding-top:56px}
}
@media(max-width:360px){.site-header{padding-inline:17px;gap:8px}.site-brand{font-size:12px}.topbar{gap:8px}.site-nav{gap:12px}.content{padding-inline:23px}.languages button{padding-inline:4px;min-width:28px}}
@media (prefers-reduced-motion: reduce){
 *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}
 .hero-wordmark { transform: none !important; opacity: 1 !important; }
 .hero-stage::before{opacity:1!important}.motion-ready .reveal{opacity:1!important;transform:none!important}
}

/* Once entered, the intro leaves the document flow. Scrolling up stops at About. */
.intro-complete .hero{display:none}
.intro-complete body[data-page=home] .content{margin-top:0;padding-top:128px}
@media(max-width:560px){.intro-complete body[data-page=home] .content{padding-top:108px}}

.reading-title{display:none}
.intro-complete .reading-title{display:block;position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}

/* Company and its projects are a real three-level hierarchy. */
#work .section-heading{margin-bottom:30px}
.work-meta{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:baseline;gap:12px 24px;margin-bottom:26px}
.work-company{font-size:20px;font-weight:550;line-height:1.5;letter-spacing:-.35px}
.work-role{font-size:13px;line-height:1.75;color:var(--muted);margin-top:4px}
.work-meta .work-period{font-size:13px;line-height:1.75;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap;margin:0}
.work-list{list-style:none;padding:0 0 0 24px;margin:0}
.work-list>li{margin-bottom:28px}.work-list>li:last-child{margin-bottom:0}
.work-list h4{font-size:15px;font-weight:500;line-height:1.65;letter-spacing:-.15px}
.work-contributions{list-style:disc;padding:0 0 0 17px;margin:8px 0 0;color:var(--body);font-size:14px;line-height:1.85}.work-contributions>li{padding-left:2px;margin:0}.work-contributions>li+li{margin-top:5px}.work-contributions>li::marker{font-size:.65em;color:#89919a}
.inline-link{text-decoration:underline;text-decoration-color:#b4bec8;text-underline-offset:4px;text-decoration-thickness:1px;transition:color .15s,text-decoration-color .15s}
.inline-link:hover{text-decoration-color:currentColor;color:var(--accent)}
.project h3{font-size:17px;font-weight:500}.project p{max-width:620px;margin-top:7px}
@media(max-width:560px){
 #work .section-heading{margin-bottom:26px}.work-meta{gap:8px 14px;margin-bottom:24px}.work-company{font-size:18px}.work-role{font-size:12px}.work-meta .work-period{font-size:12px}
 .work-list{padding-left:8px}.work-list>li{margin-bottom:28px}.work-list h4{font-size:15px}.work-contributions{font-size:14px;line-height:1.8;margin-top:8px;padding-left:16px}.work-list .work-patent{font-size:12px}
 .project h3{font-size:16px}
}
@media(max-width:380px){.work-meta{grid-template-columns:1fr;gap:6px}.work-meta .work-period{grid-column:1}.work-list{padding-left:8px}}

/* Quiet emphasis and resilient text wrapping, without badges or extra cards. */
::selection{background:#dfe8f2;color:var(--ink)}
.work-contributions strong,.project strong{font-weight:550;color:var(--ink)}
.paper-title{overflow-wrap:anywhere;text-wrap:pretty}.paper-detail{overflow-wrap:anywhere}
/* Static long-form writing: reading width, vertical rhythm and contained overflow. */
.writing-article{min-height:calc(100svh - 280px);margin:0;min-width:0}
.article-back{display:inline-flex;align-items:center;min-height:44px;font-size:13px;color:var(--muted);margin-bottom:24px}
.article-title{max-width:24ch;font-size:38px;font-weight:500;line-height:1.25;letter-spacing:-1.1px;overflow-wrap:anywhere;text-wrap:pretty}
.article-header time{display:block;font-size:13px;color:var(--muted);margin-top:16px;font-variant-numeric:tabular-nums;letter-spacing:0}
.article-body{max-width:68ch;margin-top:38px;color:var(--body);font-size:17px;line-height:1.9;overflow-wrap:anywhere}
.article-body>:first-child{margin-top:0}.article-body>:last-child{margin-bottom:0}
.article-body p{font:inherit;color:inherit;margin:0 0 1.3em}
.article-body h1,.article-body h2,.article-body h3,.article-body h4,.article-body h5,.article-body h6{color:var(--ink);font-weight:550;line-height:1.45;letter-spacing:-.3px;margin:2.1em 0 .7em;scroll-margin-top:110px;overflow-wrap:anywhere}
.article-body h1,.article-body h2{font-size:25px}.article-body h3{font-size:21px}.article-body h4,.article-body h5,.article-body h6{font-size:18px}
.article-body strong{font-weight:600;color:var(--ink)}.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.article-body ul,.article-body ol{padding-left:1.35em;margin:0 0 1.3em}.article-body li{padding-left:.2em;margin:.35em 0}.article-body li>ul,.article-body li>ol{margin:.3em 0}.article-body li>p{margin:.3em 0}
.article-body blockquote{margin:1.5em 0;padding:.15em 0 .15em 1.1em;border-left:2px solid #ccd5dd;color:#616b75}.article-body blockquote p:last-child{margin-bottom:0}
.article-body code{font-family:ui-monospace,SFMono-Regular,Consolas,'Liberation Mono',monospace;font-size:.86em;background:#f3f5f7;border-radius:3px;padding:.12em .3em;overflow-wrap:anywhere}
.article-body pre{max-width:100%;overflow:auto;margin:1.5em 0;padding:20px 22px;background:#f6f7f9;border:1px solid #e8ebef;border-radius:6px;font-family:ui-monospace,SFMono-Regular,Consolas,'Liberation Mono',monospace;font-size:14px;line-height:1.75;tab-size:2;overscroll-behavior-x:contain}
.article-body pre code{font:inherit;display:block;width:max-content;min-width:100%;padding:0;background:none;border-radius:0;white-space:pre;overflow-wrap:normal;color:#313842}
.article-body img{display:block;max-width:100%;height:auto;margin:1.6em auto;border-radius:4px}.article-body figure{margin:1.6em 0}.article-body figcaption{font-size:13px;text-align:center;color:var(--muted);margin-top:10px}
.article-body hr{border:0;border-top:1px solid #e2e5e9;margin:2em 0}
.article-body .table-scroll{max-width:100%;overflow-x:auto;margin:1.5em 0;overscroll-behavior-x:contain}.article-body table{width:100%;border-collapse:collapse;font-size:14px;line-height:1.7}.article-body th,.article-body td{padding:10px 14px;text-align:left;border-bottom:1px solid #e2e5e9;min-width:110px}.article-body th{font-weight:550;color:var(--ink)}
.article-body input[type=checkbox]{display:inline-block;width:14px;height:14px;min-height:0;padding:0;margin:0 .35em 0 0;vertical-align:middle}
@media(max-width:560px){.article-back{margin-bottom:20px}.article-title{font-size:30px;line-height:1.3;letter-spacing:-.8px}.article-body{margin-top:30px;font-size:16px;line-height:1.85}.article-body h1,.article-body h2{font-size:23px}.article-body h3{font-size:20px}.article-body pre{padding:16px;font-size:13px}.article-body th,.article-body td{padding:9px 12px}}

/* Compact background credentials: readable lists, not another set of cards. */
#education,#awards{margin-top:40px;padding-top:28px;border-top:1px solid #e2e5e9}
.education-list,.credential-list{list-style:none;padding:0;margin:0}
.education-list li{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px 24px;align-items:baseline}
.education-list li+li{margin-top:18px}
.education-list h3{font-size:15px;font-weight:500;line-height:1.65}
.education-list p,.credential-list p{font-size:13px;line-height:1.75;color:var(--muted);margin-top:3px}
.education-list .entry-date,.credential-list time{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap;margin:0}
#awards .section-heading{margin-bottom:22px}
.credential-list li{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px 18px;align-items:baseline}
.credential-list li+li{margin-top:18px}
.credential-list h3{font-size:14px;font-weight:500;line-height:1.7;letter-spacing:-.1px;overflow-wrap:anywhere}
@media(max-width:560px){#education,#awards{margin-top:32px;padding-top:24px}.education-list li{grid-template-columns:minmax(0,1fr);gap:4px}.education-list .entry-date{margin-top:1px}.education-list li+li{margin-top:20px}.credential-list li{gap:4px 14px}#awards .section-heading{margin-bottom:20px}}

/* Quiet, self-contained error state for Cloudflare Pages. */
.not-found{min-height:calc(100vh - 152px);display:flex;flex-direction:column;justify-content:center;align-items:flex-start;padding:80px 0 120px}.not-found-code{font-size:12px;letter-spacing:.14em;color:var(--accent);margin-bottom:16px}.not-found h1{font-size:clamp(34px,6vw,64px);font-weight:500;letter-spacing:-2px;line-height:1.05}.not-found-copy{max-width:460px;margin-top:18px;color:var(--muted);line-height:1.8}.not-found-link{display:inline-block;margin-top:28px;color:var(--ink);text-underline-offset:5px}.not-found-link:hover{color:var(--accent)}
@media(max-width:560px){.not-found{min-height:calc(100vh - 120px);padding:56px 0 88px}.not-found h1{letter-spacing:-1.2px}}