:root {
  --ink: #edf3f8;
  --surface: #fbfcfe;
  --surface-2: #f1f5f9;
  --white: #18314f;
  --muted: #64748b;
  --line: rgba(24, 49, 79, 0.13);
  --purple: #686bdc;
  --green: #1a9871;
  --blue: #2878c8;
  --coral: #e9684a;
  --gradient: linear-gradient(125deg, #d9edff 0%, #e5e1ff 48%, #ffe7d8 100%);
  --sans: "Outfit", "Noto Sans KR", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--ink); color: var(--white); font-family: var(--sans); font-size: 16px; line-height: 1.7; -webkit-font-smoothing: antialiased; }
section[id] { scroll-margin-top: 66px; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
.skip-link { position: fixed; top: -100px; left: 20px; z-index: 100; padding: 10px 16px; background: #fff; color: #111; border-radius: 8px; }
.skip-link:focus { top: 20px; }
.page-width { width: min(100% - 48px, 1080px); margin: 0 auto; }
.gradient-surface { position: relative; background: var(--gradient); color: var(--white); overflow: hidden; }
.dark-surface { background: var(--surface); color: var(--white); }
.noise { position: absolute; inset: 0; opacity: .025; pointer-events: none; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E"); }

.site-header { position: fixed; inset: 0 0 auto; z-index: 50; display: flex; align-items: center; justify-content: space-between; height: 78px; padding: 0 clamp(24px, 5vw, 70px); border-bottom: 1px solid transparent; transition: background .3s, border-color .3s, height .3s; }
.site-header.scrolled { height: 66px; background: rgba(251, 252, 254, .9); border-color: var(--line); backdrop-filter: blur(16px); }
.brand { font-size: 24px; font-weight: 800; letter-spacing: -.05em; }
.brand span { color: var(--coral); }
.site-nav { display: flex; align-items: center; gap: 42px; }
.site-nav a { position: relative; font-size: 12px; font-weight: 700; letter-spacing: .11em; opacity: .7; transition: opacity .2s; }
.site-nav a::after { content: ""; position: absolute; left: 0; bottom: -8px; width: 100%; height: 2px; background: currentColor; transform: scaleX(0); transition: transform .2s; }
.site-nav a:hover, .site-nav a.active { opacity: 1; }
.site-nav a.active::after { transform: scaleX(1); }
.menu-button { display: none; border: 0; background: transparent; }

.home-hero { min-height: 76vh; display: flex; align-items: center; padding: 140px max(24px, calc((100vw - 1200px) / 2)) 100px; }
.hero-content { position: relative; z-index: 2; width: 100%; max-width: 900px; min-width: 0; }
.hero-kicker, .section-label { margin: 0 0 18px; font-size: 11px; font-weight: 700; letter-spacing: .17em; }
.home-hero h1 { margin: 0; font-size: clamp(58px, 8.3vw, 112px); line-height: .88; letter-spacing: -.065em; font-weight: 800; }
.home-hero h1 span { color: var(--coral); }
.hero-name { margin: 30px 0 0; font-size: clamp(18px, 2vw, 25px); font-weight: 600; letter-spacing: .02em; }
.hero-description { width: min(100%, 640px); margin: 12px 0 0; color: var(--muted); font-size: clamp(15px, 1.4vw, 18px); line-height: 1.8; word-break: keep-all; overflow-wrap: break-word; }
.hero-actions { display: flex; align-items: center; gap: 30px; margin-top: 32px; }
.outline-button { display: inline-flex; align-items: center; justify-content: space-between; gap: 50px; min-width: 210px; padding: 13px 18px; border: 2px solid var(--white); border-radius: 12px; font-size: 12px; font-weight: 700; letter-spacing: .08em; transition: background .2s, color .2s, transform .2s; }
.outline-button:hover { background: var(--white); color: #fff; transform: translateY(-3px); }
.plain-link { font-size: 12px; font-weight: 700; letter-spacing: .08em; }
.plain-link span { display: inline-block; margin-left: 10px; transition: transform .2s; }
.plain-link:hover span { transform: translateX(5px); }
.floating-shape { position: absolute; z-index: 1; border: 1px solid rgba(24,49,79,.15); border-radius: 50%; pointer-events: none; }
.shape-one { width: min(42vw, 600px); aspect-ratio: 1; right: -8%; top: -30%; box-shadow: inset 0 0 80px rgba(255,255,255,.18); }
.shape-two { width: 220px; height: 220px; right: 18%; bottom: -20%; background: rgba(72,139,207,.09); backdrop-filter: blur(4px); }
.scroll-mark { position: absolute; right: 45px; bottom: 36px; display: flex; align-items: center; gap: 15px; transform: rotate(90deg); transform-origin: right bottom; font-size: 9px; letter-spacing: .2em; }
.scroll-mark i { width: 45px; height: 1px; background: var(--white); }

.home-intro { padding: 110px 0 130px; }
.intro-grid { display: grid; grid-template-columns: 25% 1fr; gap: 30px; }
.section-label { color: #4f67c7; }
.intro-grid h2, .content-heading h2, .blog-intro h2 { margin: 0; font-size: clamp(36px, 5vw, 65px); line-height: 1.08; letter-spacing: -.055em; }
.intro-grid > div > p { max-width: 720px; margin: 28px 0 0; color: var(--muted); font-size: 18px; }
.home-links { margin-top: 65px; border-top: 1px solid var(--line); }
.home-links a { display: grid; grid-template-columns: 60px 1fr auto; align-items: center; gap: 20px; padding: 25px 5px; border-bottom: 1px solid var(--line); transition: padding .2s, background .2s; }
.home-links a:hover { padding-right: 18px; padding-left: 18px; background: rgba(40,120,200,.045); }
.home-links span { color: #8491a3; font-size: 11px; }
.home-links strong { font-size: 18px; }
.home-links i { font-style: normal; font-size: 20px; }

.about-section { padding: 110px 0 125px; }
.section-intro { display: grid; grid-template-columns: 25% 1fr; align-items: start; margin-bottom: 65px; }
.section-intro h2 { margin: 0; font-size: clamp(40px, 5.2vw, 68px); line-height: 1.06; letter-spacing: -.055em; }
.section-intro > p:last-child { grid-column: 2; max-width: 620px; margin: 22px 0 0; color: var(--muted); font-size: 16px; }

.page-hero { min-height: 345px; display: flex; align-items: flex-end; padding: 130px 0 52px; }
.page-hero .page-width { position: relative; z-index: 2; }
.page-hero h1 { margin: 0; font-size: clamp(45px, 6vw, 74px); line-height: .98; letter-spacing: -.055em; }
.page-hero .page-width > p:last-child { max-width: 600px; margin: 18px 0 0; color: rgba(255,255,255,.83); }
.blog-hero { --gradient: linear-gradient(125deg, #236dde 0%, #7252ec 48%, #da70bc 100%); }
.page-body { padding: 70px 0 120px; }
.glass-card { border: 1px solid var(--line); background: rgba(255,255,255,.82); border-radius: 20px; box-shadow: 0 18px 45px rgba(71, 94, 125, .09); }

.profile-section { display: grid; grid-template-columns: 240px minmax(0,1fr); gap: 28px; align-items: stretch; }
.profile-photo { width: 240px; min-height: 320px; overflow: hidden; border: 1px solid var(--line); border-radius: 16px; background: radial-gradient(circle at 25% 20%, rgba(104,107,220,.18), transparent 30%), linear-gradient(145deg, #e9f3ff, #f5eee8); box-shadow: 0 14px 35px rgba(71,94,125,.09); }
.profile-photo img { width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.photo-placeholder { position: relative; height: 100%; min-height: 480px; display: grid; place-items: center; color: rgba(24,49,79,.4); font-size: 11px; line-height: 1.5; letter-spacing: .18em; text-align: center; overflow: hidden; }
.photo-placeholder::before { content: ""; position: absolute; top: 17%; width: 42%; aspect-ratio: 1; border: 1px solid rgba(24,49,79,.16); border-radius: 50%; }
.photo-placeholder::after { content: ""; position: absolute; bottom: -25%; width: 90%; aspect-ratio: 1; border: 1px solid rgba(24,49,79,.16); border-radius: 50% 50% 0 0; }
.profile-card { padding: 15px 25px; }
.profile-card h2 { margin: 0; font-size: clamp(34px, 4vw, 50px); line-height: 1; letter-spacing: -.04em; }
.profile-card h2 span { display: block; margin-top: 12px; color: var(--muted); font-size: 15px; font-weight: 500; letter-spacing: .03em; }
.profile-card .role { margin: 14px 0 0; color: #4f67c7; font-size: 13px; }
.profile-summary { max-width: 680px; margin: 14px 0 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.profile-details { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin: 18px 0 0; }
.profile-details div { padding: 10px 13px; border: 1px solid var(--line); border-radius: 11px; background: #f8fbfe; }
.profile-details dt { color: #7c8a9d; font-size: 11px; }
.profile-details dd { margin: 5px 0 0; font-size: 13px; }
.content-section { margin-top: 100px; }
.content-heading { display: grid; grid-template-columns: 25% 1fr; align-items: end; margin-bottom: 36px; }
.content-heading h2 { font-size: clamp(34px, 4vw, 52px); }
.interest-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.interest-card { min-height: 320px; padding: 26px; transition: transform .22s, border-color .22s; }
.interest-card:hover { transform: translateY(-6px); border-color: rgba(40,120,200,.35); }
.interest-card > span { color: #8391a3; font-size: 11px; }
.interest-card h3 { margin: 70px 0 14px; font-size: 23px; line-height: 1.15; letter-spacing: -.035em; }
.interest-card p { color: var(--muted); font-size: 14px; }
.interest-card ul { display: flex; flex-wrap: wrap; gap: 7px; margin: 22px 0 0; padding: 0; list-style: none; }
.interest-card li { padding: 4px 9px; border: 1px solid var(--line); border-radius: 999px; color: #52647a; font-size: 10px; background: #f5f8fc; }

.publication-list, .timeline, .note-list { border-top: 1px solid var(--line); }
.publication-group-title { margin: 0 0 15px; color: #5f7086; font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.publication-group-title.conference-title { margin-top: 52px; }
.publication-list article { display: grid; grid-template-columns: 130px 1fr; gap: 28px; padding: 30px 5px; border-bottom: 1px solid var(--line); }
.publication-list time, .timeline time, .note-list time { color: #7d8da1; font-size: 11px; letter-spacing: .06em; }
.publication-list article > div > span, .note-list div > span { color: #4f67c7; font-size: 10px; font-weight: 700; letter-spacing: .09em; }
.publication-list h3 { margin: 7px 0 8px; font-size: clamp(20px, 2.4vw, 29px); line-height: 1.25; letter-spacing: -.035em; }
.publication-list p { margin: 0; color: var(--muted); font-size: 13px; }
.publication-list .publication-venue { margin-top: 5px; color: #7c8a9d; }
.publication-list nav { display: flex; gap: 15px; margin-top: 14px; }
.publication-list nav a { padding-bottom: 2px; border-bottom: 1px solid #7e8da0; font-size: 11px; }
.timeline article { display: grid; grid-template-columns: 25% 1fr; gap: 20px; padding: 25px 5px; border-bottom: 1px solid var(--line); }
.timeline h3 { margin: 0; font-size: 20px; }
.timeline p { margin: 3px 0 0; color: var(--muted); font-size: 13px; }

.blog-intro { max-width: 700px; }
.blog-intro h2 { font-size: clamp(36px, 4.8vw, 58px); }
.blog-intro > p:last-child { max-width: 600px; margin: 20px 0 0; color: var(--muted); }
.blog-section { position: relative; padding: 115px 0 130px; overflow: hidden; border-top: 1px solid var(--line); background: #eef5fa; }
.blog-section .page-width { position: relative; z-index: 1; }
.blog-glow { position: absolute; top: -300px; right: -180px; width: 650px; height: 650px; border-radius: 50%; background: rgba(94,132,213,.13); filter: blur(90px); pointer-events: none; }
.blog-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; max-width: 850px; margin-top: 50px; }
.blog-card { --card-color: var(--purple); position: relative; min-height: 350px; display: flex; flex-direction: column; justify-content: space-between; gap: 30px; padding: 25px; overflow: hidden; transition: transform .22s, border-color .22s, box-shadow .22s; }
.blog-card::before { content: ""; position: absolute; right: -45px; bottom: -55px; width: 150px; height: 150px; border-radius: 50%; background: var(--card-color); opacity: .12; filter: blur(20px); }
.blog-card:hover { transform: translateY(-7px); border-color: var(--card-color); box-shadow: 0 24px 50px rgba(71,94,125,.14); }
.accent-purple { --card-color: var(--purple); }.accent-green { --card-color: var(--green); }.accent-blue { --card-color: var(--blue); }
.blog-card-top { position: relative; display: flex; align-items: center; justify-content: space-between; }
.channel-mark { display: grid; place-items: center; width: 50px; height: 50px; border-radius: 15px; background: rgba(155,124,255,.14); color: var(--card-color); font-size: 20px; font-weight: 800; }
.channel-type { padding: 5px 9px; border-radius: 999px; background: rgba(155,124,255,.11); color: var(--card-color); font-size: 9px; font-weight: 700; letter-spacing: .08em; }
.blog-card h2 { margin: 0; font-size: 25px; letter-spacing: -.035em; }
.blog-card p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.blog-meta { position: relative; display: flex; justify-content: space-between; gap: 15px; color: #77879b; font-size: 10px; }
.blog-meta i { color: var(--white); font-size: 17px; font-style: normal; transition: transform .2s; }
.blog-card:hover .blog-meta i { transform: translate(3px,-3px); }
.recent-section { margin-top: 105px; }
.note-list a { display: grid; grid-template-columns: 130px 1fr auto; align-items: center; gap: 20px; padding: 26px 5px; border-bottom: 1px solid var(--line); transition: padding .2s, background .2s; }
.note-list a:hover { padding-right: 17px; padding-left: 17px; background: rgba(40,120,200,.04); }
.note-list h3 { margin: 5px 0 0; font-size: clamp(17px, 2vw, 23px); line-height: 1.3; }
.note-list i { font-size: 18px; font-style: normal; }

.site-footer { display: grid; grid-template-columns: 1.2fr 1fr auto auto; align-items: end; gap: 45px; padding: 45px clamp(24px, 5vw, 70px); border-top: 1px solid var(--line); background: var(--ink); }
.site-footer > div:first-child, .footer-contact { display: flex; flex-direction: column; }
.site-footer strong { font-size: 13px; letter-spacing: .08em; }
.site-footer span, .site-footer p { margin: 0; color: #77879b; font-size: 10px; }
.footer-contact a { font-size: 12px; }
.footer-links { display: flex; gap: 20px; font-size: 11px; }
.footer-links a:hover, .footer-contact a:hover { color: #4f67c7; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 850px) {
  .site-header { height: 68px; }
  .menu-button { position: absolute; z-index: 2; top: 17px; right: 24px; display: flex !important; flex-direction: column; align-items: stretch; justify-content: center; gap: 7px; width: 34px; height: 34px; padding: 8px 0; cursor: pointer; }
  .menu-button span { display: block; width: 100%; height: 2px; background: var(--white); border-radius: 2px; transition: transform .25s; }
  .menu-button[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .site-nav { position: fixed; inset: 0; flex-direction: column; align-items: flex-start; justify-content: center; gap: 26px; padding: 20vw; background: rgba(248,251,254,.98); transform: translateX(100%); transition: transform .32s ease; }
  .site-nav.open { transform: translateX(0); }
  .site-nav a { font-size: 32px; letter-spacing: -.03em; }
  .site-nav a::after { bottom: -3px; }
  .intro-grid { grid-template-columns: 1fr; }
  .section-intro { grid-template-columns: 1fr; }
  .section-intro > p:last-child { grid-column: 1; }
  .profile-section { grid-template-columns: 1fr; }
  .profile-photo { width: 240px; height: 320px; justify-self: center; }
  .photo-placeholder { min-height: 320px; }
  .content-heading { grid-template-columns: 1fr; gap: 4px; }
  .interest-grid, .blog-grid { grid-template-columns: 1fr; }
  .interest-card { min-height: auto; }
  .interest-card h3 { margin-top: 40px; }
  .blog-card { min-height: 300px; }
  .site-footer { grid-template-columns: 1fr 1fr; align-items: start; }
}

@media (max-width: 540px) {
  .page-width { width: min(100% - 36px, 1080px); }
  .home-hero { min-height: 720px; padding: 120px 22px 90px; }
  .hero-content { max-width: 100%; }
  .hero-description { width: calc(100% - 8px); padding-right: 8px; word-break: keep-all; overflow-wrap: anywhere; }
  .home-hero h1 { font-size: clamp(53px, 16vw, 76px); }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 20px; }
  .scroll-mark { display: none; }
  .home-intro { padding: 80px 0 95px; }
  .about-section, .blog-section { padding: 80px 0 90px; }
  .section-intro { margin-bottom: 45px; }
  .section-intro h2 { font-size: 40px; }
  .intro-grid h2 { font-size: 39px; }
  .home-links a { grid-template-columns: 35px 1fr auto; }
  .page-hero { min-height: 330px; padding-bottom: 42px; }
  .page-hero h1 { font-size: 45px; }
  .page-body { padding: 48px 0 85px; }
  .profile-photo { width: 220px; height: 293px; }
  .photo-placeholder { min-height: 293px; }
  .profile-card { padding: 24px 20px; }
  .profile-details { grid-template-columns: 1fr; }
  .content-section, .recent-section { margin-top: 75px; }
  .publication-list article, .timeline article { grid-template-columns: 1fr; gap: 7px; }
  .note-list a { grid-template-columns: 1fr auto; gap: 7px 15px; }
  .note-list time { grid-column: 1 / -1; }
  .site-footer { grid-template-columns: 1fr; gap: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}