/* Academic theme (prototype) — loaded after site.css */
@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css");
@import url("https://fonts.googleapis.com/css2?family=Noto+Serif+KR:wght@500;600;700&family=Source+Serif+4:ital,wght@0,400;0,600;1,400&display=swap");

:root{
  --ink:#14213d;          /* headings */
  --navy:#14213d;
  --blue:#1f4e8c;         /* single accent */
  --sky:#1f4e8c;
  --ivory:#f6f7f9;
  --paper:#ffffff;
  --text:#2a2f36;
  --muted:#5f6873;
  --line:#e2e5ea;
  --serif:"Source Serif 4","Noto Serif KR",Georgia,serif;
  --sans:Pretendard,"Noto Sans KR",system-ui,sans-serif;
}
body{background:#fff;color:var(--text);font-family:var(--sans);letter-spacing:-.005em}

/* header */
.site-header{background:#fffffff2;border-bottom:1px solid var(--line)}
.header-inner{height:72px}
.brand-mark{border-radius:4px;background:var(--blue);font-family:var(--serif);font-weight:600;width:36px;height:36px}
.brand b{font:600 14px/1.2 var(--serif);letter-spacing:.06em;color:var(--ink)}
.brand small{font-size:10px;letter-spacing:.04em;text-transform:none}
.desktop-nav{font-size:14px;gap:26px;color:#3a4350}
.desktop-nav a:hover{color:var(--blue)}

/* shared type */
.eyebrow{color:var(--blue);font-size:12px;letter-spacing:.12em;font-weight:600}
.section-heading h2,.project-copy h2,.invitation h2{font-family:var(--serif);font-weight:600;letter-spacing:-.02em;color:var(--ink)}
.section-heading h2{font-size:clamp(26px,2.6vw,34px);line-height:1.4}
.section-heading{grid-template-columns:.3fr .7fr;gap:48px;margin-bottom:44px;padding-top:28px;border-top:2px solid var(--ink)}
.section-heading>div>p{font-size:15.5px;color:var(--muted);margin-top:14px}
.section{padding-top:88px;padding-bottom:88px}

/* buttons */
.button{border-radius:4px;min-height:44px;font-size:14px;gap:12px;border-color:var(--blue)}
.button.primary{background:var(--blue);border-color:var(--blue)}
.button.primary:hover{background:var(--ink);border-color:var(--ink);transform:none}
.button.ghost{color:var(--blue)}
.button.ghost:hover{background:#eef3fa;transform:none}

/* hero */
.hero{min-height:auto;grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);gap:72px;padding-top:84px;padding-bottom:84px;align-items:center}
.hero h1{font-family:var(--serif);font-weight:600;letter-spacing:-.03em;font-size:clamp(34px,3.4vw,46px);line-height:1.38;margin:20px 0 24px}
.hero h1 em{color:var(--blue)}
.hero-lead{font-size:17px;line-height:1.8;color:var(--muted);max-width:600px}
.hero-actions{margin-top:34px}
.hero-profile{border:1px solid var(--line);border-radius:6px;background:#fff;overflow:hidden}
.hero-profile img{width:100%;aspect-ratio:4/4.2;object-fit:cover;object-position:center 20%;display:block;background:var(--ivory)}
.hero-profile-body{padding:22px 24px 24px}
.hero-profile-body b{display:block;font:600 21px/1.3 var(--serif);color:var(--ink)}
.hero-profile-body b small{font:400 14px var(--sans);color:var(--muted);margin-left:8px}
.hero-profile-body p{margin:8px 0 0;font-size:13.5px;line-height:1.6;color:var(--muted)}
.hero-profile-body ul{display:flex;flex-wrap:wrap;gap:6px 14px;margin:16px 0 0;padding-top:14px;border-top:1px solid var(--line)}
.hero-profile-body li a{font-size:13px;color:var(--blue)}
.hero-profile-body li a:hover{text-decoration:underline}

/* metrics: light rule band instead of dark block */
.metrics-band{background:var(--ivory);color:var(--ink);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.metrics div{border-color:var(--line)!important;min-height:120px}
.metrics strong{font:600 36px/1 var(--serif);color:var(--ink)}
.metrics span{color:var(--muted);font-size:13px;letter-spacing:0}

/* research pillars: quiet 2x2 list */
.pillar-grid{border:0;gap:0 48px}
.pillar-card{border:0;border-bottom:1px solid var(--line);background:none;min-height:0;padding:28px 0}
.pillar-card:hover{background:none;transform:none;box-shadow:none}
.pillar-card:hover h3{color:var(--blue)}
.pillar-top{font:600 13px/1 var(--serif);color:var(--blue)}
.pillar-top i{display:none}
.pillar-card h3{margin:14px 0 6px;font:600 21px/1.4 var(--serif);transition:color .2s}
.pillar-card .pillar-en{font-size:11px;letter-spacing:.06em;font-weight:600;color:#8a929c}
.pillar-card>p:last-child{margin-top:14px;font-size:15px;line-height:1.75}
.section-link a,.project-copy>a{color:var(--blue);border-bottom-color:var(--blue);font-size:14px;gap:10px}

/* selected work: bibliography style on white */
.ink-section{background:#fff;color:var(--text)}
.section-heading.is-light h2{color:var(--ink)}
.section-heading.is-light>div>p{color:var(--muted)}
.section-heading.is-light .eyebrow{color:var(--blue)}
.featured-list{border-top:0}
.featured-paper{border-bottom:1px solid var(--line);grid-template-columns:56px 1fr;padding:24px 0}
.paper-no{color:var(--blue);font:600 14px/1.6 var(--serif)}
.paper-meta{color:var(--muted);font-size:13px;letter-spacing:0;text-transform:none;margin-bottom:6px}
.featured-paper h3{font:600 clamp(18px,1.7vw,21px)/1.45 var(--serif);color:var(--ink);max-width:900px}
.paper-tag{color:#8a929c;font-size:11px;letter-spacing:.08em;font-weight:600;margin-top:10px}
.button.light-button{margin-top:32px;background:#fff;color:var(--blue);border:1px solid var(--blue)}
.button.light-button:hover{background:#eef3fa}

/* flagship project: callout box */
.project-feature{grid-template-columns:.32fr .68fr;gap:56px;background:var(--ivory);border-left:4px solid var(--blue);padding:56px 56px;margin-top:24px;margin-bottom:24px}
.project-year{font:600 clamp(30px,3.4vw,44px)/1 var(--serif);color:var(--ink)}
.project-year i{color:#a3abb5}
.project-copy h2{font-size:clamp(24px,2.6vw,32px);line-height:1.4;margin:16px 0}
.project-funder{color:var(--blue);font-size:13px}

/* news */
.news-list{border-top:0}
.news-list article{padding:20px 0}
.news-list h3{font:500 18px/1.5 var(--sans);color:var(--ink)}
.news-list h3 a:hover{color:var(--blue);text-decoration:underline}

/* invitation */
.invitation{background:#fff;border-top:1px solid var(--line)}
.invitation h2{font-size:clamp(24px,2.6vw,32px);line-height:1.45}

/* footer */
.site-footer{background:var(--ivory);color:var(--text);border-top:1px solid var(--line);padding:56px 0 24px}
.footer-brand{font:600 20px/1.2 var(--serif);color:var(--ink);letter-spacing:.03em}
.footer-grid p,.footer-grid a{color:var(--muted);font-size:13px}
.footer-grid a:hover{color:var(--blue)}
.footer-label{color:var(--ink)!important;font-size:11px!important;letter-spacing:.1em}
.footer-bottom{color:#8a929c;border-top-color:var(--line);margin-top:44px;font-size:11px}

/* subpages */
.page-hero{padding-top:84px;padding-bottom:72px}
.page-hero h1{font-family:var(--serif);font-weight:600;letter-spacing:-.03em;font-size:clamp(36px,4vw,54px);line-height:1.2}
.page-hero.is-en h1{font-size:clamp(34px,3.6vw,48px)}
h2,h3{font-family:var(--serif)}
.content-heading.light h2{color:var(--ink)}
.ink-section .eyebrow{color:var(--blue)}
.ink-section:not(:has(.featured-list)){background:var(--ivory);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.detail-columns{border-top-color:var(--line)}
.detail-columns details{border-bottom-color:var(--line)}
.detail-columns summary{color:var(--ink);font-family:var(--serif);font-weight:600}
.detail-columns summary span{color:var(--blue)}
.detail-columns li{color:var(--muted);font-size:13.5px}
.detail-columns li:before{color:var(--blue)}
.filter-buttons button{border-radius:4px}
.filter-buttons button.active{background:var(--blue);border-color:var(--blue)}
.profile-monogram{background:var(--blue)}

/* nav CTA + collaborate page (2026-10-27) */
.desktop-nav a.nav-cta{background:var(--blue);color:#fff;border-radius:4px;padding:8px 14px;margin-left:4px}
.desktop-nav a.nav-cta:after{display:none}
.desktop-nav a.nav-cta:hover{background:var(--ink);color:#fff}
.mobile-nav nav a.nav-cta{color:var(--blue);font-weight:700}
.collab-hero-actions{margin-top:22px!important}
.collab-hero-actions .button{color:#fff}
.topic-list{border-top:1px solid var(--line)}
.topic-card{display:grid;grid-template-columns:64px 1fr;gap:20px;padding:34px 0;border-bottom:1px solid var(--line)}
.topic-no{font:600 15px/1.6 var(--serif);color:var(--blue)}
.topic-card h3{margin:0 0 10px;font:600 23px/1.4 var(--serif);color:var(--ink)}
.topic-card>div>p{margin:0;max-width:820px;color:var(--muted);font-size:15.5px;line-height:1.8}
.topic-card .topic-talk{margin-top:16px;font-size:14px;color:var(--text)}
.topic-talk b{display:inline-block;margin-right:10px;padding:2px 8px;border-radius:3px;background:#eef3fa;color:var(--blue);font-size:12px;font-weight:600}
.topic-card .topic-posts-label{margin-top:18px;font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--ink)}
.topic-posts{margin:8px 0 0;padding:0;display:grid;gap:6px}
.topic-posts a{color:var(--blue);font-size:14.5px;line-height:1.55}
.topic-posts a:hover{text-decoration:underline}
.format-grid{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}
.format-grid div{padding:24px 22px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.format-grid b{display:block;font:600 18px/1.4 var(--serif);color:var(--ink)}
.format-grid span{display:block;margin-top:8px;font-size:14px;line-height:1.6;color:var(--muted)}
.audience-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;margin-top:28px}
.audience-row b{font-size:13px;letter-spacing:.06em;color:var(--ink)}
.audience-row ul{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0}
.audience-row li{padding:6px 12px;border:1px solid var(--line);border-radius:999px;font-size:14px;color:var(--text)}
.cred-columns{display:grid;grid-template-columns:1fr 1fr;gap:56px}
.cred-columns .subhead{margin:0 0 12px;font:600 13px/1 var(--sans);letter-spacing:.08em;color:var(--blue)}
.cred-list,.lecture-list{margin:0;padding:0;border-top:1px solid var(--line)}
.cred-list li{padding:13px 0;border-bottom:1px solid var(--line);font-size:15px;line-height:1.6}
.lecture-list li{display:grid;grid-template-columns:72px 1fr;gap:12px;padding:13px 0;border-bottom:1px solid var(--line)}
.lecture-list time{font:600 13px/1.7 var(--serif);color:var(--muted)}
.lecture-list b{display:block;font-size:13px;color:var(--muted);font-weight:600}
.lecture-list span{display:block;margin-top:2px;font-size:15px;line-height:1.55;color:var(--text)}
.cred-columns .section-link{text-align:left;margin-top:18px}
.inquiry-box{border:1px solid var(--line);border-radius:6px;background:#fff;padding:8px}
.inquiry-box iframe{display:block;width:100%;height:2900px;border:0}
.inquiry-alt{margin:12px 16px 10px;font-size:14px;color:var(--muted)}
.inquiry-alt a{color:var(--blue);text-decoration:underline}
.channel-links{display:flex;flex-wrap:wrap;gap:12px}
.channel-links a{display:inline-flex;gap:10px;padding:14px 20px;border:1px solid var(--blue);border-radius:4px;color:var(--blue);font-size:15px}
.channel-links a:hover{background:#eef3fa}
@media (width<=900px){.format-grid{grid-template-columns:1fr 1fr}.cred-columns{grid-template-columns:1fr;gap:40px}}
@media (width<=620px){.format-grid{grid-template-columns:1fr}.topic-card{grid-template-columns:1fr;gap:6px}.topic-card h3{font-size:20px}.inquiry-box iframe{height:3300px}}

@media (width<=900px){
  .hero{grid-template-columns:1fr;gap:44px}
  .hero-profile{max-width:420px}
  .project-feature{grid-template-columns:1fr;gap:20px;padding:36px 28px}
  .section-heading{grid-template-columns:1fr;gap:12px}
}
@media (width<=620px){
  .wrap{width:min(100% - 32px,1180px)}
  .hero{padding-top:48px;padding-bottom:56px}
  .hero h1{font-size:clamp(28px,7.6vw,34px)}
  .hero-actions{flex-direction:row;flex-wrap:wrap}
  .hero-profile img{aspect-ratio:4/3.4}
  .metrics strong{font-size:30px}
  .section{padding-top:64px;padding-bottom:64px}
  .pillar-grid{grid-template-columns:1fr}
  .pillar-card{padding:22px 0}
  .featured-paper{grid-template-columns:32px 1fr}
  .project-feature{width:100%;border-left-width:0;border-top:4px solid var(--blue);padding:32px 16px}
}
/* phone header: keep the lecture/collaboration CTA visible next to the menu */
.mobile-cta{display:none}
@media (width<=1080px){.mobile-cta{display:inline-flex;align-items:center;height:42px;padding:0 12px;background:var(--blue);color:#fff;border-radius:4px;font-size:13px;font-weight:700;white-space:nowrap}.mobile-cta:hover{background:var(--ink);color:#fff}}
@media (width<=420px){.mobile-header-actions{gap:8px}.mobile-cta{padding:0 9px;font-size:12px}}
@media (width<=420px){.lang-switch a{white-space:nowrap}.lang-switch{padding-left:6px;padding-right:6px}}
@media (width<=420px){.brand{gap:8px}.mobile-header-actions{gap:6px}.lang-switch a{min-width:17px;padding-left:1px;padding-right:1px}.mobile-cta{padding:0 8px}.mobile-nav summary{width:38px;height:38px}.mobile-cta{height:38px}}