/* ===== CAMEL Lab — shared styles ===== */
:root{
  --ink:#1a1f2b;
  --ink-soft:#3b4252;
  --muted:#6b7280;
  --line:#e6e8ee;
  --blue:#0b4f9c;
  --blue-deep:#083a73;
  --blue-tint:#eef4fb;
  --bg:#ffffff;
  --max:1120px;
  --radius:10px;
  --font:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Segoe UI","Apple SD Gothic Neo","Noto Sans KR",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto} *{transition:none!important;animation:none!important}}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible,button:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:4px}
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:600;letter-spacing:-0.01em}
p{margin:0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---- header / nav ---- */
.site-header{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:50}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:76px;gap:24px}
.brand{display:flex;align-items:center;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-logo{height:46px;width:auto;display:block}
.brand-text{display:none;font-weight:800;font-size:26px;letter-spacing:-0.02em;line-height:1}
.brand-text small{display:block;font-weight:400;font-size:11px;color:var(--muted);letter-spacing:0;margin-top:3px}
.site-header.no-logo .brand-logo{display:none}
.site-header.no-logo .brand-text{display:block}
.nav{display:flex;gap:8px;height:100%}
.nav-item{position:relative;display:flex;align-items:center}
.nav-item>a{display:flex;align-items:center;height:76px;padding:0 18px;color:var(--ink);font-weight:600;font-size:18px;position:relative}
.nav-item>a:hover{text-decoration:none;color:var(--blue)}
.nav-item>a[aria-current="page"]{color:var(--blue)}
.nav-item>a[aria-current="page"]::after{content:"";position:absolute;left:18px;right:18px;bottom:0;height:2px;background:var(--blue)}
.sub{position:absolute;top:100%;left:0;min-width:170px;background:#fff;border:1px solid var(--line);border-top:0;border-radius:0 0 8px 8px;box-shadow:0 10px 24px rgba(20,30,50,.08);padding:6px 0;display:none;flex-direction:column}
.sub a{padding:9px 18px;color:var(--ink-soft);font-size:16px}
.sub a:hover{background:var(--blue-tint);color:var(--blue);text-decoration:none}
.sub a[aria-current="page"]{color:var(--blue);font-weight:600}
.nav-item.has-sub:hover .sub,.nav-item.has-sub:focus-within .sub{display:flex}
.nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:6px;padding:6px 10px;font:inherit;cursor:pointer}
@media (max-width:760px){
  .nav-toggle{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:76px;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;padding:8px 16px 16px;gap:0;height:auto}
  .nav.open{display:flex}
  .nav-item{flex-direction:column;align-items:stretch}
  .nav-item>a{height:auto;padding:12px 8px}
  .nav-item>a[aria-current="page"]::after{display:none}
  .sub{position:static;display:flex;border:0;box-shadow:none;padding:0 0 6px 18px;min-width:0}
  .sub a{padding:8px}
}

/* ---- page scaffolding ---- */
main.wrap{padding:64px 24px 104px}
.page-head{background:linear-gradient(180deg,#f2f6fb 0%,#fafcfe 100%);border-bottom:1px solid var(--line)}
.page-head .wrap{padding-top:52px;padding-bottom:48px}
.page-title{font-size:36px;margin:0;letter-spacing:-0.02em}
.page-lead{color:var(--muted);max-width:62ch;margin:10px 0 0;font-size:14px}
.section{margin-top:88px}
.section-title{font-size:22px;padding-bottom:12px;border-bottom:2px solid var(--ink);margin-bottom:32px;display:flex;align-items:baseline;justify-content:space-between;gap:16px}
.section-title .count{font-size:14px;color:var(--muted);font-weight:400}

/* ---- footer ---- */
.site-footer{border-top:1px solid var(--line);padding:32px 0;color:var(--muted);font-size:14px}
.site-footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}
.site-footer a{color:var(--muted)}

/* ===== HOME ===== */
.hero{display:grid;grid-template-columns:5fr 6fr;gap:72px;align-items:center;padding:24px 0 16px}
.hero-figure img{width:100%;max-height:440px;object-fit:contain}
.slider-section{margin-top:64px}
@media (max-width:900px){.hero{grid-template-columns:1fr;gap:32px}}
.acrostic{font-size:clamp(34px,4.4vw,52px);font-weight:600;line-height:1.08;letter-spacing:-0.02em;color:var(--ink);list-style:none;margin:0 0 32px;padding:0}
.acrostic li::first-letter{color:var(--blue)}
.hero-desc{font-size:18px;line-height:1.75;color:var(--ink-soft);max-width:46ch}
.hero-desc strong{color:var(--ink);font-weight:600}
.hero-links{margin-top:36px;display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 22px;border-radius:6px;font-weight:500;border:1px solid var(--blue);color:var(--blue)}
.btn:hover{text-decoration:none;background:var(--blue-tint)}
.btn.solid{background:var(--blue);color:#fff}
.btn.solid:hover{background:var(--blue-deep)}

/* stats strip */
.stats{list-style:none;margin:56px 0 0;padding:30px 0;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
@media (max-width:640px){.stats{grid-template-columns:repeat(2,1fr)}}
.stats li{text-align:center}
.stats b{display:block;font-size:30px;font-weight:700;color:var(--blue);letter-spacing:-0.02em;line-height:1.1;font-variant-numeric:tabular-nums}
.stats span{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}

/* slider */
.slider{position:relative;border-radius:var(--radius);overflow:hidden;background:#0f172a}
.slider .viewport{aspect-ratio:16/9;overflow:hidden}
.slider .track{display:flex;height:100%;transition:transform .5s ease}
.slider .slide{flex:0 0 100%;height:100%}
.slider .slide img{width:100%;height:100%;object-fit:cover;object-position:50% 30%}
.slider .nav-btn{position:absolute;top:50%;transform:translateY(-50%);width:38px;height:38px;border:0;border-radius:50%;background:rgba(255,255,255,.85);color:var(--ink);font-size:22px;line-height:1;cursor:pointer;display:grid;place-items:center}
.slider .nav-btn:hover{background:#fff}
.slider .prev{left:12px}.slider .next{right:12px}
.slider .dots{position:absolute;bottom:12px;left:0;right:0;display:flex;justify-content:center;gap:7px}
.slider .dot{width:8px;height:8px;border-radius:50%;border:0;padding:0;background:rgba(255,255,255,.5);cursor:pointer}
.slider .dot[aria-current="true"]{background:#fff}

/* videos */
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media (max-width:900px){.video-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.video-grid{grid-template-columns:1fr}}
.video{aspect-ratio:16/9;border-radius:8px;overflow:hidden;background:#000}
.video iframe{width:100%;height:100%;border:0}

/* news */
.news-list{list-style:none;margin:0;padding:0}
.news-list li{display:grid;grid-template-columns:84px 76px 1fr;gap:16px;padding:14px 0;border-bottom:1px solid var(--line);align-items:baseline}
@media (max-width:560px){.news-list li{grid-template-columns:84px 1fr}.news-list .text{grid-column:1/-1}}
.news-list .date{color:var(--ink-soft);font-weight:600;font-variant-numeric:tabular-nums;font-size:14px}
.tag{font-size:12px;font-weight:700;padding:2px 8px;border-radius:999px;border:1px solid var(--line);color:var(--ink-soft);width:fit-content;white-space:nowrap}
.tag[data-kind="Award"]{color:#8a5a00;border-color:#f1d9a3;background:#fff8e6}
.tag[data-kind="Paper"]{color:var(--blue);border-color:#c9dcf3;background:var(--blue-tint)}
.tag[data-kind="Project"]{color:#1e6b3a;border-color:#c3e3cf;background:#eefaf2}
.tag[data-kind="Patent"]{color:#6d3aa8;border-color:#dccff0;background:#f6f1fc}
.tag[data-kind="Lab"]{color:#555;background:#f5f5f5}
.lang-links{font-size:14px;font-weight:600;letter-spacing:.02em}
.lang-links a{color:#8fbde8;padding:2px 3px}
.lang-links a:hover{color:var(--blue);text-decoration:none}
.lang-links a[aria-current="true"]{color:var(--blue);border-bottom:2px solid var(--blue)}
.lang-links .sep{color:#c9d6e3;margin:0 4px}
.news-more{margin-top:16px;text-align:center}
.news-more button{font:inherit;border:1px solid var(--line);background:#fff;padding:8px 16px;border-radius:6px;cursor:pointer;color:var(--ink-soft)}
.news-more button:hover{background:var(--blue-tint);color:var(--blue)}

/* ===== PEOPLE ===== */
.card{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 4px 12px rgba(0,0,0,.06);padding:16px;overflow:hidden}
.professor{display:grid;grid-template-columns:340px 1fr;gap:28px;align-items:start;padding:24px}
@media (max-width:760px){.professor{grid-template-columns:1fr}}
.professor img{width:100%;max-width:340px;aspect-ratio:3/4;object-fit:cover;border-radius:12px;background:#f3f4f6;margin:0 auto}
.professor .name{font-size:28px;font-weight:700;margin:0}
.professor .position{font-size:18px;font-weight:600;color:var(--blue);margin:4px 0 12px}
.professor .contact{font-size:15px;color:var(--ink-soft);line-height:1.8;margin-bottom:6px}
.professor h4{font-size:17px;font-weight:700;margin:18px 0 6px;color:var(--ink)}
.professor ul{list-style:none;margin:0;padding:0;font-size:15px;color:var(--ink-soft)}
.professor li{position:relative;padding-left:16px;margin:4px 0;line-height:1.55}
.professor li::before{content:"▸";position:absolute;left:0;color:var(--blue);font-weight:700}
.professor li span:first-child{color:var(--muted);margin-right:8px;font-variant-numeric:tabular-nums}
.people-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;--avatar:150px}
@media (max-width:900px){.people-grid{grid-template-columns:1fr;--avatar:120px}}
.member{display:grid;grid-template-columns:var(--avatar) 1fr;gap:16px;align-items:start}
.member img{width:var(--avatar);aspect-ratio:3/4;object-fit:cover;object-position:top;border-radius:12px;background:#f3f4f6;display:block}
.member .info{min-width:0;display:flex;flex-direction:column}
.member .name{font-size:22px;font-weight:700;margin:0;color:var(--ink)}
.member .degree{font-size:16px;font-weight:600;color:var(--blue);margin:2px 0 8px}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 8px;padding:0;list-style:none}
.tags li{font-size:14px;padding:4px 10px;border-radius:999px;border:1px solid #d9dde3;background:#f9fafb;color:var(--ink-soft)}
.member .email{font-size:15px;margin-top:2px;overflow-wrap:anywhere}
.member .email a{color:var(--blue)}
.member .employment{font-size:15px;color:var(--ink-soft);line-height:1.6;margin-top:4px}
.member .employment span{font-weight:600;color:var(--ink)}
@media (max-width:900px){.member .name{font-size:19px}.member .degree,.member .email{font-size:15px}}

/* ===== PROJECTS ===== */
.project-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
@media (max-width:820px){.project-grid{grid-template-columns:1fr}}
.project{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.project img{width:100%;aspect-ratio:16/9;object-fit:contain;background:#f7f8fa}
.project .body{padding:20px}
.project h3{font-size:18px;color:var(--blue);margin-bottom:12px}
.project dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:4px 14px;font-size:14px}
.project dt{color:var(--muted);white-space:nowrap}
.project dd{margin:0;color:var(--ink-soft)}
.project ul{margin:14px 0 0;padding-left:0;list-style:none;font-size:14px;color:var(--ink-soft)}
.project ul li{padding-left:16px;position:relative;margin-top:5px}
.project ul li::before{content:"";position:absolute;left:0;top:.6em;width:7px;height:7px;border-radius:2px;background:var(--blue)}

/* ===== PUBLICATIONS ===== */
.pub-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:36px}
.pub-tabs button{font:inherit;font-size:14px;font-weight:500;padding:7px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;cursor:pointer;color:var(--ink-soft)}
.pub-tabs button[aria-selected="true"]{background:var(--ink);color:#fff;border-color:var(--ink)}
.pub-year{font-size:17px;color:var(--ink);font-weight:700;margin:28px 0 6px;font-variant-numeric:tabular-nums}
.pub{display:grid;grid-template-columns:64px 1fr;gap:14px;padding:12px 0;border-top:1px solid var(--line)}
.pub .id{font-size:13px;font-weight:600;color:var(--ink-soft);font-variant-numeric:tabular-nums;padding-top:3px}
.pub .title{font-weight:600}
.pub .venue{color:var(--muted);font-size:14px;font-style:italic}
.pub .authors{font-size:14px;color:var(--ink-soft)}
@media (max-width:560px){.pub{grid-template-columns:1fr}.pub .id{padding:0}}

/* ===== GALLERY ===== */
.gallery-group{margin-top:44px}
.gallery-group:first-child{margin-top:0}
.gallery-group h2{font-size:22px;margin-bottom:18px}
.album-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media (max-width:900px){.album-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.album-grid{grid-template-columns:1fr}}
.album{display:block;color:var(--ink)}
.album:hover{text-decoration:none}
.album img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:8px;background:#f0f2f5}
.album:hover img{opacity:.92}
.album-title{font-weight:600;margin-top:10px}
.album-count{font-size:13px;color:var(--muted)}
.back{margin:0 0 20px;font-size:15px}
.album-section{font-size:19px;margin:36px 0 14px}
.photo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:14px}
@media (max-width:900px){.photo-grid{grid-template-columns:repeat(2,1fr)}}
.photo{padding:0;border:0;background:#f0f2f5;border-radius:6px;overflow:hidden;cursor:zoom-in;aspect-ratio:4/3}
.photo img{width:100%;height:100%;object-fit:cover;display:block}
.lightbox{position:fixed;inset:0;background:rgba(10,12,18,.94);z-index:100;display:flex;align-items:center;justify-content:center}
.lightbox[hidden]{display:none}
.lightbox img{max-width:92vw;max-height:88vh;object-fit:contain;border-radius:4px}
.lightbox button{position:absolute;border:0;background:rgba(255,255,255,.12);color:#fff;width:44px;height:44px;border-radius:50%;font-size:26px;line-height:1;cursor:pointer;display:grid;place-items:center}
.lightbox button:hover{background:rgba(255,255,255,.25)}
.lb-close{top:16px;right:16px}
.lb-prev{left:16px;top:50%;transform:translateY(-50%)}
.lb-next{right:16px;top:50%;transform:translateY(-50%)}
.lb-count{position:absolute;bottom:16px;left:0;right:0;text-align:center;color:rgba(255,255,255,.7);font-size:13px;font-variant-numeric:tabular-nums}
@media (max-width:560px){.lightbox button{width:38px;height:38px;font-size:22px}.lb-prev{left:6px}.lb-next{right:6px}}

/* ===== CONTACT ===== */
.contact-banner img{width:100%;height:auto;border-radius:var(--radius);margin-bottom:36px}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
@media (max-width:820px){.contact-grid{grid-template-columns:1fr}}
.contact-list{list-style:none;margin:0;padding:0}
.contact-list li{display:grid;grid-template-columns:110px 1fr;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.contact-list .k{color:var(--muted);font-size:14px;padding-top:2px}
.map{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.map iframe{width:100%;aspect-ratio:4/3;border:0;display:block}
.map .dir{padding:14px 16px;font-size:14px;color:var(--ink-soft);background:#fafbfc}

/* ===== RESEARCH ===== */
.research-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
@media (max-width:820px){.research-grid{grid-template-columns:1fr}}
.area{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.area img{width:100%;aspect-ratio:16/9;object-fit:contain;background:#f7f8fa}
.area .body{padding:18px 20px 22px}
.area h3{font-size:19px;margin-bottom:6px}
.area p{color:var(--ink-soft);font-size:15px}

/* ---- hover polish ---- */
.card,.project,.area,.album img{transition:transform .18s ease,box-shadow .18s ease}
.card:hover,.project:hover,.area:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(20,30,50,.10)}
.album:hover img{transform:translateY(-3px);box-shadow:0 12px 28px rgba(20,30,50,.14);opacity:1}

/* ---- footer (rich) ---- */
.site-footer{padding:48px 0 36px;background:#fafbfc;margin-top:24px}
.site-footer .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;align-items:start}
@media (max-width:760px){.site-footer .wrap{grid-template-columns:1fr}}
.site-footer .f-brand{font-weight:700;color:var(--ink);font-size:17px;margin-bottom:6px}
.site-footer .f-brand small{display:block;font-weight:400;color:var(--muted);font-size:13px}
.site-footer h5{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft);margin:0 0 10px}
.site-footer ul{list-style:none;margin:0;padding:0;font-size:14px}
.site-footer li{margin:4px 0}
.site-footer .copy{grid-column:1/-1;border-top:1px solid var(--line);padding-top:16px;font-size:13px;color:var(--muted)}