/* IIPL website styles */
:root {
  --ink: #0B1324;
  --ink-2: #1B2436;
  --muted: #3A4456;
  --muted-2: #5D6779;
  --line: #E1E6EF;
  --line-2: #E6EAF1;
  --line-3: #EDF0F5;
  --soft: #F4F6FA;
  --soft-2: #F7F9FC;
  --accent: #1F47C8;
  --accent-dark: #16328F;
  --accent-tint: #E8EEFC;
  --accent-ink: #1A3BA8;
  --orange: #C2410C;
  --orange-tint: #FFEFE2;
  --orange-ink: #9A3412;
  --green-tint: #E3F4EE;
  --green-ink: #0F5E4B;
  --gray-tint: #E8EBF1;
  --gray-ink: #3F4859;
  --navy: #0B1324;
  --navy-2: #131E33;
  --navy-line: #26334D;
  --on-navy: #C9D3E6;
  --on-navy-2: #A9B4C7;
  --on-navy-3: #8D99AE;
  --sky: #8FB0FF;
  --font: 'IBM Plex Sans', 'IBM Plex Sans KR', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-ko: 'IBM Plex Sans KR', 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, Menlo, Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: #FFFFFF;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid #F59E0B; outline-offset: 2px; }
h1, h2, h3, p { margin: 0; }
[id] { scroll-margin-top: 16px; }

.wrap { max-width: 1200px; margin: 0 auto; padding-left: clamp(16px, 4vw, 40px); padding-right: clamp(16px, 4vw, 40px); }
.mono { font-family: var(--mono); }
.ko, [lang="ko"] { font-family: var(--font-ko); word-break: keep-all; }
.skip { position: absolute; left: -9999px; top: 8px; background: #FFFFFF; padding: 8px 12px; border-radius: 8px; z-index: 10; }
.skip:focus { left: 8px; }

/* Header */
.site-header { background: #FFFFFF; border-bottom: 1px solid var(--line-2); }
.nav { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 24px; padding-top: 14px; padding-bottom: 14px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; color: var(--ink); }
.brand:hover { color: var(--ink); text-decoration: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }
.brand-sub { font-size: 12px; color: var(--muted-2); }
.nav-links { display: flex; flex-wrap: wrap; align-items: center; gap: 2px 4px; }
.nl { display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px; border-radius: 8px; color: var(--muted); font-size: 15px; font-weight: 500; }
.nl:hover { background: #EEF2FB; color: var(--ink); text-decoration: none; }
.nl[aria-current="page"] { color: var(--ink); font-weight: 600; background: #EEF2FB; }
.nav-cta { min-height: 44px; padding: 0 18px; margin-left: 8px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 22px; border-radius: 999px; font: inherit; font-size: 15px; font-weight: 600; cursor: pointer; text-decoration: none; }
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #FFFFFF; border: 1px solid var(--accent); }
.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #FFFFFF; }
.btn-secondary { background: #FFFFFF; color: var(--ink); border: 1px solid #C5CDDB; }
.btn-secondary:hover { border-color: var(--ink); color: var(--ink); }
.btn-inverse { background: #FFFFFF; color: var(--ink); border: 1px solid #FFFFFF; }
.btn-inverse:hover { background: #DCE4F7; border-color: #DCE4F7; color: var(--ink); }
.btn-ghost-dark { background: transparent; color: #FFFFFF; border: 1px solid #4A5874; }
.btn-ghost-dark:hover { border-color: #FFFFFF; color: #FFFFFF; }

/* Type */
.eyebrow { font-family: var(--mono); font-size: 13px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.h-display { font-size: clamp(40px, 5.4vw, 68px); line-height: 1.04; letter-spacing: -0.03em; font-weight: 700; }
.h-page { font-size: clamp(36px, 4.6vw, 56px); line-height: 1.08; letter-spacing: -0.03em; font-weight: 700; }
.h-section { font-size: clamp(30px, 3.4vw, 42px); line-height: 1.15; letter-spacing: -0.025em; font-weight: 700; }
.lead { font-size: 19px; line-height: 1.6; color: var(--muted); max-width: 34em; }
.sub { font-size: 16px; color: var(--muted); }

/* Sections */
.section { padding: 96px 0; }
.section-soft { background: var(--soft); }
.section-dark { background: var(--navy); color: #FFFFFF; }
.section-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 16px 48px; }
.stack { display: flex; flex-direction: column; }
.gap-14 { gap: 14px; }
.gap-32 { gap: 32px; }
.gap-40 { gap: 40px; }

/* Hero */
.hero { padding: 64px 0 72px; }
.hero-grid { display: flex; flex-wrap: wrap; align-items: center; gap: 48px 56px; }
.hero-text { flex: 1 1 460px; min-width: 0; display: flex; flex-direction: column; gap: 22px; }
.hero-ko { font-size: 20px; font-weight: 500; color: var(--muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 6px; }
.stats { display: flex; flex-wrap: wrap; gap: 16px 48px; margin-top: 12px; padding-top: 24px; border-top: 1px solid var(--line-2); }
.stat { display: flex; flex-direction: column; }
.stat-num { font-size: 36px; font-weight: 700; line-height: 1.1; letter-spacing: -0.02em; }
.stat-label { font-size: 14px; color: var(--muted-2); }
.hero-photo { flex: 1 1 440px; min-width: 0; margin: 0; position: relative; }
.hero-photo img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 24px; background: #E9EDF3; }
.hero-photo figcaption { position: absolute; left: 16px; bottom: 16px; padding: 7px 14px; border-radius: 999px; background: rgba(11, 19, 36, 0.8); color: #FFFFFF; font-size: 13px; font-weight: 500; }

/* Venue strip */
.venues { padding: 26px 0; background: var(--soft); border-top: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2); }
.venues-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; }
.venues-title { font-family: var(--mono); font-size: 13px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.vchips { display: flex; flex-wrap: wrap; gap: 10px; }
.vchip { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 8px 0 16px; border: 1px solid #D7DEEA; border-radius: 999px; background: #FFFFFF; font-size: 14px; font-weight: 600; color: var(--ink); }
.vchip .n { display: inline-flex; align-items: center; justify-content: center; min-width: 28px; height: 28px; padding: 0 8px; border-radius: 999px; background: var(--accent-tint); color: var(--accent-ink); font-family: var(--mono); font-size: 13px; font-weight: 500; }

/* Research cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.card { background: #FFFFFF; border: 1px solid var(--line); border-radius: 16px; padding: 28px; display: flex; flex-direction: column; gap: 14px; }
.card-num { font-family: var(--mono); font-size: 13px; color: var(--accent); }
.card h3 { font-size: 21px; line-height: 1.3; font-weight: 600; letter-spacing: -0.01em; }
.card-desc { font-size: 15.5px; color: var(--muted); }
.card-papers { margin-top: auto; display: flex; flex-direction: column; }
.rp { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 6px 12px; padding: 11px 0; border-top: 1px solid var(--line-3); font-size: 14.5px; font-weight: 500; color: var(--ink); line-height: 1.45; }
.vb { font-family: var(--mono); font-size: 12px; font-weight: 500; color: var(--accent-ink); background: var(--accent-tint); border-radius: 6px; padding: 3px 8px; white-space: nowrap; }

/* News */
.news-grid { display: flex; flex-wrap: wrap; gap: 32px 64px; }
.news-intro { flex: 1 1 260px; display: flex; flex-direction: column; gap: 14px; }
.news-main { flex: 999 1 560px; min-width: 0; }
.news-list { list-style: none; margin: 0; padding: 0; border-bottom: 1px solid #DFE4EC; }
.news-item { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 16px; padding: 18px 0; border-top: 1px solid #DFE4EC; }
.kind { display: inline-flex; align-items: center; justify-content: center; width: 76px; height: 26px; border-radius: 999px; font-size: 12px; font-weight: 600; letter-spacing: 0.02em; }
.kind-paper { background: var(--accent-tint); color: var(--accent-ink); }
.kind-award { background: var(--orange-tint); color: var(--orange-ink); }
.kind-grant { background: var(--green-tint); color: var(--green-ink); }
.kind-service { background: var(--gray-tint); color: var(--gray-ink); }
.news-year { font-family: var(--mono); font-size: 13px; color: var(--muted-2); width: 40px; }
.news-text { flex: 1 1 320px; font-size: 16px; line-height: 1.6; color: var(--ink-2); }
.news-more { margin-top: 24px; }

/* Photos */
.photos { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 20px; }
.photo { margin: 0; display: flex; flex-direction: column; gap: 10px; }
.photo img { display: block; width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 14px; background: #E9EDF3; }
.photo figcaption { font-size: 14px; color: var(--muted); }
.link-strong { display: inline-flex; align-items: center; min-height: 44px; font-weight: 600; }

/* Join */
.join-grid { display: flex; flex-wrap: wrap; align-items: flex-start; gap: 40px 64px; }
.join-text { flex: 1 1 340px; display: flex; flex-direction: column; gap: 18px; }
.join-text .eyebrow { color: var(--sky); }
.join-title { font-size: clamp(28px, 3.2vw, 40px); line-height: 1.3; letter-spacing: -0.02em; font-weight: 700; }
.join-body { font-size: 17px; line-height: 1.75; color: var(--on-navy); }
.join-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; margin-top: 6px; }
.join-mail { font-family: var(--mono); font-size: 14px; color: var(--on-navy-2); }
.tracks { flex: 999 1 520px; min-width: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.track { background: var(--navy-2); border: 1px solid var(--navy-line); border-radius: 16px; padding: 26px; display: flex; flex-direction: column; gap: 10px; }
.track-label { font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; color: var(--sky); }
.track h3 { font-size: 20px; line-height: 1.4; font-weight: 600; }
.track p { font-size: 15.5px; line-height: 1.75; color: var(--on-navy); }
.join-band { padding: 72px 0; }
.join-band-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px 48px; }
.join-band-text { flex: 1 1 420px; display: flex; flex-direction: column; gap: 12px; }
.join-band-title { font-size: clamp(26px, 3vw, 34px); line-height: 1.3; letter-spacing: -0.02em; font-weight: 700; }

/* Footer */
.site-footer { background: var(--navy); color: var(--on-navy); border-top: 1px solid #1E2A42; padding: 40px 0 48px; }
.footer-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px 48px; font-size: 14px; line-height: 1.7; }
.footer-col { display: flex; flex-direction: column; gap: 6px; }
.footer-name { font-size: 15px; font-weight: 600; color: #FFFFFF; }
.footer-link { color: var(--on-navy); }
.footer-link:hover { color: #FFFFFF; }
.footer-copy { margin-top: 28px; font-size: 13px; color: var(--on-navy-3); }

/* People */
.page-head { padding: 64px 0 40px; }
.pi-card { display: flex; flex-wrap: wrap; gap: 32px 48px; padding: clamp(20px, 3.5vw, 40px); border: 1px solid var(--line); border-radius: 24px; background: var(--soft-2); }
.pi-photo { flex: 0 0 auto; width: 220px; height: 300px; object-fit: cover; object-position: center top; border-radius: 18px; background: #E9EDF3; }
.pi-info { flex: 999 1 420px; min-width: 0; display: flex; flex-direction: column; gap: 18px; }
.pi-name { font-size: 36px; line-height: 1.15; letter-spacing: -0.02em; font-weight: 700; }
.pi-name-ko { font-size: 24px; font-weight: 500; color: var(--muted-2); }
.pi-title { font-size: 17px; line-height: 1.55; color: var(--muted); }
.pi-bio { max-width: 46em; font-size: 16px; line-height: 1.75; color: var(--ink-2); }
.pi-contact { display: flex; flex-wrap: wrap; gap: 6px 28px; font-size: 14.5px; color: var(--muted); }
.pi-contact .k { font-family: var(--mono); font-size: 12px; color: var(--muted-2); margin-right: 8px; }
.buttons { display: flex; flex-wrap: wrap; gap: 10px; }
.honors { display: flex; flex-wrap: wrap; gap: 16px 48px; }
.honors h3 { flex: 1 1 220px; font-size: 20px; line-height: 1.4; font-weight: 700; }
.honors-list { flex: 999 1 560px; min-width: 0; border-bottom: 1px solid var(--line-2); }
.hon { display: flex; gap: 16px; align-items: baseline; padding: 14px 0; border-top: 1px solid var(--line-2); }
.hon .yr { flex: 0 0 92px; font-family: var(--mono); font-size: 13px; color: var(--muted-2); }
.hon .tx { flex: 1 1 auto; min-width: 0; font-size: 15.5px; line-height: 1.55; color: var(--ink-2); }
.group { padding: 24px 0 48px; }
.group-head { display: flex; align-items: baseline; gap: 12px; padding-bottom: 12px; border-bottom: 1px solid var(--line); margin-bottom: 20px; }
.group-head h2 { font-size: 24px; line-height: 1.3; font-weight: 700; letter-spacing: -0.01em; }
.group-head .cnt { font-family: var(--mono); font-size: 13px; color: var(--muted-2); }
.people { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.person { display: flex; gap: 16px; align-items: flex-start; padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: #FFFFFF; }
.avatar { flex: 0 0 auto; width: 56px; height: 56px; border-radius: 50%; background: #EEF1F6; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.pinfo { min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.pname { font-size: 17px; line-height: 1.4; font-weight: 600; color: var(--ink); }
.pen { font-size: 14px; line-height: 1.4; color: var(--muted); }
.prec { margin-top: 8px; font-size: 13px; line-height: 1.5; color: var(--muted); }
.plabel { font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); margin-right: 6px; }

/* Publications */
.pub-head { padding: 64px 0 32px; }
.filters { display: flex; flex-direction: column; gap: 16px; padding: clamp(16px, 2.4vw, 24px); border: 1px solid var(--line); border-radius: 20px; background: var(--soft-2); }
.search-row { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 12px 24px; }
.search-field { flex: 1 1 360px; display: flex; flex-direction: column; gap: 6px; }
.search-field label { font-size: 14px; font-weight: 600; }
.search { width: 100%; min-height: 48px; padding: 0 16px; border: 1px solid #C5CDDB; border-radius: 12px; font: inherit; font-size: 16px; color: var(--ink); background: #FFFFFF; }
.search:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(31, 71, 200, 0.2); }
.result-line { padding-bottom: 12px; font-size: 14px; color: var(--muted); }
.filter-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; }
.flab { flex: 0 0 56px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 16px; border: 1px solid #C5CDDB; border-radius: 999px; background: #FFFFFF; color: var(--ink); font: inherit; font-size: 14px; font-weight: 500; cursor: pointer; }
.chip:hover { border-color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: #FFFFFF; }
.chip .n { font-family: var(--mono); font-size: 12px; color: var(--muted-2); }
.chip[aria-pressed="true"] .n { color: var(--on-navy); }
.pub-results { padding: 12px 0 80px; }
.ygroup { display: flex; flex-wrap: wrap; gap: 8px 40px; padding: 36px 0; border-top: 1px solid var(--line); }
.ylab { flex: 0 0 140px; display: flex; flex-direction: column; gap: 2px; }
.ylab h2 { font-family: var(--mono); font-size: 28px; font-weight: 500; line-height: 1.2; color: var(--ink); }
.ylab span { font-size: 13px; color: var(--muted-2); }
.plist { flex: 999 1 560px; min-width: 0; list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; }
.pub { display: flex; flex-direction: column; gap: 5px; padding: 16px 0; border-bottom: 1px solid var(--line-3); }
.pub:first-child { padding-top: 2px; }
.pub:last-child { border-bottom: none; padding-bottom: 0; }
.pt { font-size: 17.5px; line-height: 1.45; font-weight: 600; letter-spacing: -0.005em; color: var(--ink); }
.pa { font-size: 15px; line-height: 1.55; color: var(--muted); }
.pa strong { font-weight: 600; color: var(--ink); }
.pm { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; margin-top: 2px; }
.vbadge { display: inline-flex; align-items: center; height: 24px; padding: 0 9px; border-radius: 6px; font-family: var(--mono); font-size: 12px; font-weight: 500; white-space: nowrap; }
.vbadge.conference { background: var(--accent-tint); color: var(--accent-ink); }
.vbadge.journal { background: var(--orange-tint); color: var(--orange-ink); }
.vbadge.workshop { background: var(--gray-tint); color: var(--gray-ink); }
.tag { display: inline-flex; align-items: center; height: 24px; padding: 0 9px; border: 1px solid #C5CDDB; border-radius: 999px; font-size: 12px; font-weight: 600; color: var(--muted); }
.tag.hot { background: var(--orange); border-color: var(--orange); color: #FFFFFF; }
.pv { flex: 1 1 260px; min-width: 0; font-size: 13.5px; line-height: 1.5; color: var(--muted-2); }
.plink { display: inline-flex; align-items: center; min-height: 44px; padding: 0 4px; font-size: 13.5px; font-weight: 600; }
.notice { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; margin-top: 8px; padding: 28px; border: 1px dashed #C5CDDB; border-radius: 20px; background: var(--soft-2); }
.notice p { font-size: 16px; color: var(--ink-2); }
[hidden] { display: none !important; }

/* Projects */
.proj-results { padding: 12px 0 80px; }
.ylab .glab { font-family: var(--font); font-size: 24px; font-weight: 700; letter-spacing: -0.01em; }
.rbadge { display: inline-flex; align-items: center; height: 24px; padding: 0 9px; border-radius: 6px; background: var(--gray-tint); color: var(--gray-ink); font-size: 12px; font-weight: 600; white-space: nowrap; }
.rbadge.pi { background: var(--accent-tint); color: var(--accent-ink); }
.pyr { font-family: var(--mono); font-size: 13px; color: var(--muted); white-space: nowrap; }

/* Gallery */
.ylab.gev { flex: 0 0 220px; gap: 4px; }
.ylab .gdate { font-family: var(--mono); font-size: 13px; color: var(--accent); }
.ylab .gtitle { font-family: var(--font); font-size: 20px; line-height: 1.35; font-weight: 700; letter-spacing: -0.01em; }
.gal-grid { flex: 999 1 560px; min-width: 0; list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; }
.gthumb { display: block; width: 100%; padding: 0; border: none; border-radius: 12px; overflow: hidden; background: #E9EDF3; cursor: zoom-in; }
.gthumb img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; transition: transform 0.2s ease; }
.gthumb:hover img { transform: scale(1.03); }
.lightbox { width: 100vw; height: 100vh; height: 100dvh; max-width: 100vw; max-height: 100vh; max-height: 100dvh; margin: 0; padding: 0; border: none; background: rgba(8, 12, 22, 0.96); color: #FFFFFF; }
.lightbox[open] { display: flex; flex-direction: column; }
.lightbox::backdrop { background: rgba(8, 12, 22, 0.96); }
.lb-stage { flex: 1 1 auto; min-height: 0; display: flex; align-items: center; justify-content: center; padding: 16px; }
.lb-stage img { max-width: 100%; max-height: calc(100vh - 120px); max-height: calc(100dvh - 120px); width: auto; object-fit: contain; border-radius: 8px; }
.lb-bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; padding: 8px clamp(16px, 4vw, 40px) 20px; }
.lb-cap { flex: 1 1 240px; font-size: 15px; color: var(--on-navy); }
.lb-actions { display: flex; gap: 8px; }
.lb-btn { display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 48px; padding: 0; border: 1px solid #4A5874; border-radius: 999px; background: transparent; color: #FFFFFF; cursor: pointer; }
.lb-btn:hover { border-color: #FFFFFF; }

@media (max-width: 560px) {
  .section { padding: 64px 0; }
  .hero { padding: 40px 0 56px; }
  .nav-cta { margin-left: 0; }
  .stats { gap: 16px 32px; }
  .pi-photo { width: 160px; height: 218px; }
  .hon { flex-wrap: wrap; gap: 2px 16px; }
  .hon .yr { flex-basis: 100%; }
}