/* ==========================================================================
   MEIC Lab — black theme
   색상 한 곳에서만 바꾸면 사이트 전체에 반영된다.
   ========================================================================== */
:root{
  --bg:#000000;
  --surface:#0c0c0e;
  --surface-2:#141418;
  --line:#26262c;
  --text:#eaeaee;
  --muted:#9b9ba5;
  --accent:#5aa2ff;
  --accent-dim:#2b6fd1;
  --radius:10px;
  --wrap:1320px;
  --font:'Inter','Noto Sans KR',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--font);font-weight:400;line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(0,0,0,.82);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:baseline;gap:8px}
.brand-mark{font-weight:700;font-size:1.25rem;letter-spacing:.06em}
.brand-sub{color:var(--muted);font-size:.8rem;letter-spacing:.16em;text-transform:uppercase}

.nav-toggle{display:none}
.nav-burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-burger span{width:22px;height:2px;background:var(--text);display:block}

.nav-root{display:flex;gap:4px;list-style:none;margin:0;padding:0}
.nav-item{position:relative}
.nav-item > a{
  display:block;padding:10px 14px;font-size:.78rem;font-weight:500;
  letter-spacing:.1em;color:var(--muted);transition:color .18s;
}
.nav-item > a:hover{color:var(--text)}
.nav-sub{
  position:absolute;top:100%;left:0;min-width:250px;
  background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius);
  list-style:none;margin:0;padding:6px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .18s,transform .18s,visibility .18s;
}
.nav-item.has-children:hover .nav-sub,
.nav-item.has-children:focus-within .nav-sub{opacity:1;visibility:visible;transform:translateY(0)}
.nav-sub a{display:block;padding:9px 12px;font-size:.85rem;color:var(--muted);border-radius:6px}
.nav-sub a:hover{background:rgba(90,162,255,.1);color:var(--text)}

/* ---------- hero ---------- */
.home-hero{
  min-height:62vh;display:flex;align-items:center;
  border-bottom:1px solid var(--line);
  background:radial-gradient(1000px 500px at 50% -10%,rgba(90,162,255,.12),transparent 70%);
}
.home-hero h1{font-size:clamp(2.2rem,6vw,4.2rem);line-height:1.1;margin:0 0 18px;font-weight:700;letter-spacing:-.02em}
.home-hero .lead{color:var(--muted);font-size:clamp(1rem,1.6vw,1.2rem);max-width:70ch;margin:0}

.page-hero{padding:72px 0 34px;border-bottom:1px solid var(--line)}
.page-hero h1{font-size:clamp(1.9rem,4vw,2.8rem);margin:0;font-weight:700;letter-spacing:-.015em}
.eyebrow{color:var(--accent);font-size:.75rem;letter-spacing:.18em;text-transform:uppercase;margin:0 0 10px;font-weight:600}
.lead{color:var(--muted);margin:14px 0 0;max-width:75ch}
.page-body{padding:48px 0 90px}

/* ---------- generic blocks ---------- */
h2{font-size:1.5rem;margin:52px 0 18px;font-weight:600;letter-spacing:-.01em}
h2:first-child{margin-top:0}
h3{font-size:1.1rem;margin:28px 0 10px;font-weight:600}
p{margin:0 0 14px}
.muted{color:var(--muted)}
.section-label{
  display:flex;align-items:center;gap:14px;margin:56px 0 22px;
  font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);font-weight:600;
}
.section-label::after{content:"";flex:1;height:1px;background:var(--line)}

/* ---------- cards / grids ---------- */
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(auto-fill,minmax(340px,1fr))}
.grid-2x2{grid-template-columns:repeat(2,minmax(0,1fr))}          /* 항상 2열 (2x2 배치) */
.grid-3{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.grid-4{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:border-color .2s,transform .2s;
}
.card:hover{border-color:var(--accent-dim);transform:translateY(-2px)}

/* ---------- people ---------- */
.person{text-align:left;display:flex;flex-direction:column}
.person .person-body{flex:1}
.person-photo{aspect-ratio:3/4;background:var(--surface-2);overflow:hidden}
.person-photo img{width:100%;height:100%;object-fit:cover}
.person-body{padding:14px 16px 18px}
.person-name{font-weight:600;margin:0 0 4px}
.person-line{color:var(--muted);font-size:.82rem;margin:0 0 4px}
.person-line a{color:var(--accent)}

/* ---------- publications ---------- */
.pub{display:flex;gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}
.pub-thumb{flex:0 0 120px}
.pub-thumb img{border:1px solid var(--line);border-radius:6px;background:#fff}
.pub-body{flex:1;min-width:0}
.pub-title{font-weight:600;margin:0 0 8px;line-height:1.4;font-size:1.06rem;color:var(--text)}
.pub-title a:hover{color:var(--accent)}
.pub-authors{color:#c3c3cc;font-size:.9rem;margin:0 0 5px}
.pub-venue{color:var(--muted);font-size:.87rem;font-style:italic;margin:0}
.status-note{
  font-style:normal;font-size:.72rem;color:var(--muted);margin-left:10px;
  padding:1px 7px;border-radius:4px;border:1px solid var(--line);vertical-align:1px;
}
.badge{
  display:inline-block;font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;
  padding:3px 8px;border-radius:999px;border:1px solid var(--line);color:var(--muted);
  margin-left:8px;vertical-align:middle;font-weight:600;
}
.badge.review{border-color:var(--accent-dim);color:var(--accent)}

/* ---------- projects (탭) ---------- */
.tabs{display:flex;gap:26px;border-bottom:1px solid var(--line);margin-bottom:8px}
.tab-btn{
  background:none;border:0;padding:14px 2px;cursor:pointer;font-family:inherit;
  font-size:1rem;font-weight:600;color:var(--muted);border-bottom:2px solid transparent;
}
.tab-btn.is-active{color:var(--text);border-bottom-color:var(--accent)}
.project{padding:30px 0;border-bottom:1px solid var(--line)}
.project-date{color:var(--accent);font-size:.85rem;margin:0 0 6px}
.project-head{font-size:1.12rem;font-weight:600;margin:0 0 12px;line-height:1.45}
.project-title-kr{margin:0 0 2px;font-size:.95rem}
.project-title-en{margin:0 0 14px;font-size:.9rem;color:var(--muted)}
.project-budget{margin:0;font-size:.85rem;color:var(--muted)}

/* ---------- news ---------- */
.news-item{display:flex;gap:32px;padding:34px 0;border-bottom:1px solid var(--line);align-items:flex-start}
.news-cover{flex:0 0 400px;aspect-ratio:3/2;overflow:hidden;border-radius:var(--radius);background:var(--surface-2)}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.news-item:hover .news-cover img{transform:scale(1.04)}
.news-body{flex:1;min-width:0}
.news-date{color:var(--accent);font-size:.88rem;margin:0 0 8px;font-weight:600}
.news-title{font-size:1.34rem;font-weight:600;margin:0 0 12px;letter-spacing:-.015em;line-height:1.35}
.news-text{color:var(--muted);font-size:1rem;line-height:1.7;margin:0}


/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);padding:44px 0 26px;margin-top:60px;background:var(--surface)}
.footer-inner{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.footer-name{font-weight:600;margin:0 0 6px}
.footer-meta{color:var(--muted);font-size:.86rem;margin:0}
.footer-links{display:flex;gap:20px;align-items:flex-start}
.footer-links a{color:var(--muted);font-size:.86rem}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{color:var(--muted);font-size:.78rem;margin-top:26px;padding-top:18px;border-top:1px solid var(--line)}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .grid-2x2{grid-template-columns:1fr}
  .nav-burger{display:flex}
  .site-nav{
    position:absolute;top:64px;left:0;right:0;background:var(--surface-2);
    border-bottom:1px solid var(--line);max-height:0;overflow:hidden;transition:max-height .28s;
  }
  .nav-toggle:checked ~ .site-nav{max-height:80vh;overflow-y:auto}
  .nav-root{flex-direction:column;padding:8px 0}
  .nav-sub{position:static;opacity:1;visibility:visible;transform:none;border:0;background:transparent;padding-left:14px}
  .pub,.news-item{flex-direction:column}
  .pub-thumb,.news-cover{flex:none;width:100%;max-width:220px}
}

/* ---------- spin-off company ---------- */
.company-hero{
  padding:96px 0 76px;border-bottom:1px solid var(--line);
  background:
    radial-gradient(760px 380px at 18% 0%,rgba(90,162,255,.16),transparent 68%),
    radial-gradient(620px 340px at 88% 12%,rgba(140,90,255,.10),transparent 68%);
}
.company-hero h1{font-size:clamp(2.6rem,7vw,4.6rem);margin:0 0 10px;font-weight:700;letter-spacing:-.03em}
.company-tagline{
  font-size:clamp(1rem,2vw,1.35rem);font-weight:600;margin:0 0 22px;
  letter-spacing:.02em;color:var(--text);
}
.company-tagline span{
  display:block;margin-top:6px;font-size:.8em;font-weight:400;
  color:var(--muted);letter-spacing:.14em;text-transform:uppercase;
}
.cta{
  display:inline-flex;align-items:center;gap:10px;margin-top:30px;
  padding:13px 26px;border-radius:999px;font-weight:600;font-size:.95rem;
  background:var(--accent);color:#04122a;transition:transform .18s,box-shadow .18s;
}
.cta:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(90,162,255,.28)}
.cta-outline{background:transparent;color:var(--accent);border:1px solid var(--accent-dim);margin-top:0}
.cta-outline:hover{box-shadow:none;background:rgba(90,162,255,.1)}
.feature-list{list-style:none;padding:0;margin:0}
.feature-list li{
  padding:16px 0 16px 26px;border-bottom:1px solid var(--line);position:relative;color:var(--muted);
}
.feature-list li::before{content:"";position:absolute;left:2px;top:24px;width:7px;height:7px;border-radius:50%;background:var(--accent)}
.feature-list strong{color:var(--text);font-weight:600}
.company-contact{
  display:flex;justify-content:space-between;align-items:flex-end;gap:28px;flex-wrap:wrap;
  margin-top:56px;padding:28px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);
}


/* ---------- figures (research pages) ---------- */
.fig-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px;margin:20px 0 30px}
.fig-grid.fig-single{grid-template-columns:minmax(0,960px)}
/* 투명 배경 피규어가 다크모드에서 안 보이지 않도록 항상 흰 배경 */
.fig-grid img{width:100%;border:1px solid var(--line);border-radius:8px;background:#fff}
.fig-grid a:hover img{border-color:var(--accent-dim)}

/* ---------- professor ---------- */
.prof-hero{padding:70px 0 46px;border-bottom:1px solid var(--line);
  background:radial-gradient(760px 380px at 12% 0%,rgba(90,162,255,.12),transparent 70%)}
.prof-grid{display:grid;grid-template-columns:300px 1fr;gap:44px;align-items:start}
.prof-photo img{width:100%;border-radius:var(--radius);border:1px solid var(--line);aspect-ratio:3/4;object-fit:cover}
.prof-info h1{font-size:clamp(1.8rem,3.6vw,2.7rem);margin:0 0 8px;font-weight:700;letter-spacing:-.02em}
.prof-info h1 span{color:var(--muted);font-weight:400}
.prof-title{font-size:1.05rem;font-weight:600;margin:0 0 14px;color:var(--accent)}
.prof-affil{color:var(--muted);margin:0 0 20px;line-height:1.75}
.prof-links{display:flex;gap:20px;flex-wrap:wrap;margin:0}
.prof-links a{color:var(--accent);font-size:.9rem;border-bottom:1px solid transparent}
.prof-links a:hover{border-bottom-color:var(--accent)}
.timeline{border-top:1px solid var(--line)}
.tl-row{display:grid;grid-template-columns:160px 190px 1fr;gap:22px;padding:18px 0;border-bottom:1px solid var(--line)}
.tl-period{color:var(--accent);font-size:.88rem;font-weight:600}
.tl-role{font-weight:600;font-size:.95rem}
.tl-place{color:var(--muted);font-size:.9rem;line-height:1.6}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.contact-map iframe{width:100%;height:360px;border:1px solid var(--line);border-radius:var(--radius);
  filter:invert(.92) hue-rotate(180deg) saturate(.6);background:var(--surface-2)}

@media (max-width:820px){
  .prof-grid{grid-template-columns:1fr;gap:26px}
  .prof-photo{max-width:260px}
  .tl-row{grid-template-columns:1fr;gap:6px;padding:16px 0}
  .contact-grid{grid-template-columns:1fr;gap:30px}
}

/* ---------- research: video embeds ---------- */
.video-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(380px,1fr));gap:18px;margin:24px 0 34px}
.video-grid.video-single{grid-template-columns:1fr}
.video-frame{position:relative;padding-top:56.25%;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#000}
.video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* ---------- members: education / research interest ---------- */
.person-field-label{
  margin:10px 0 4px;color:var(--accent);
  font-size:.66rem;font-weight:700;
  letter-spacing:.12em;text-transform:uppercase;
}
.person-tags{list-style:none;margin:0 0 6px;padding:0}
.person-tags li{
  position:relative;padding-left:12px;color:var(--muted);
  font-size:.8rem;line-height:1.55;margin-bottom:2px;
}
.person-tags li::before{
  content:"";position:absolute;left:0;top:.58em;
  width:4px;height:4px;border-radius:50%;background:var(--accent-dim);
}
.person-edu li{opacity:.9}
.person-edu li::before{background:var(--line)}

/* ---------- gallery: 주제별 캐러셀 ---------- */
.gal{margin-bottom:64px}
.gal-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:14px;flex-wrap:wrap}
.gal-date{color:var(--accent);font-size:.9rem;margin:0 0 5px;font-weight:600}
.gal-title{font-size:1.5rem;font-weight:600;margin:0;letter-spacing:-.015em}
.gal-nav{display:flex;align-items:center;gap:8px}
.gal-count{color:var(--muted);font-size:.78rem;margin-right:4px}
.gal-btn{
  width:36px;height:36px;border-radius:50%;cursor:pointer;
  background:var(--surface-2);border:1px solid var(--line);color:var(--text);
  font-size:1.15rem;line-height:1;display:grid;place-items:center;
  transition:background .18s,border-color .18s,opacity .18s;
}
.gal-btn:hover:not(:disabled){background:rgba(90,162,255,.14);border-color:var(--accent-dim)}
.gal-btn:disabled{opacity:.3;cursor:default}
.gal-track{
  display:grid;grid-auto-flow:column;
  grid-auto-columns:calc((100% - 22px) / 2);      /* 데스크톱 2장 — 크게 보이도록 */
  gap:22px;overflow-x:auto;scroll-snap-type:x mandatory;
  scrollbar-width:none;-ms-overflow-style:none;padding-bottom:4px;
}
.gal-track::-webkit-scrollbar{display:none}
.gal-slide{scroll-snap-align:start;display:block}
.gal-slide img{
  width:100%;aspect-ratio:3/2;object-fit:cover;
  border:1px solid var(--line);border-radius:var(--radius);
  transition:border-color .18s,transform .18s;
}
.gal-slide:hover img{border-color:var(--accent-dim);transform:translateY(-3px)}
@media (max-width:900px){ .gal-track{grid-auto-columns:92%} }   /* 태블릿·모바일 1장 */

/* ---------- news: 다중 사진 캐러셀 ---------- */
.news-media{position:relative;flex:0 0 520px;border-radius:var(--radius);overflow:hidden;background:var(--surface-2)}
.news-track{
  display:grid;grid-auto-flow:column;grid-auto-columns:100%;
  overflow-x:auto;scroll-snap-type:x mandatory;
  scrollbar-width:none;-ms-overflow-style:none;
}
.news-track::-webkit-scrollbar{display:none}
.news-slide{scroll-snap-align:start;display:block}
.news-slide img{width:100%;aspect-ratio:3/2;object-fit:cover;display:block}
.news-arrow{
  position:absolute;top:50%;transform:translateY(-50%);
  width:38px;height:38px;border-radius:50%;cursor:pointer;z-index:2;
  background:rgba(0,0,0,.6);border:1px solid rgba(255,255,255,.18);color:#fff;
  font-size:1.05rem;line-height:1;display:grid;place-items:center;
  opacity:0;transition:opacity .18s,background .18s;
}
.news-media:hover .news-arrow{opacity:1}
.news-arrow:hover:not(:disabled){background:rgba(90,162,255,.75)}
.news-arrow:disabled{opacity:0 !important}
.news-arrow.prev{left:8px}
.news-arrow.next{right:8px}
.news-counter{
  position:absolute;right:8px;bottom:8px;z-index:2;
  background:rgba(0,0,0,.62);color:#fff;font-size:.7rem;
  padding:2px 8px;border-radius:999px;letter-spacing:.04em;
}
.news-counter b{font-weight:600}

/* ---------- publication: 이미지 없는 논문 대체 카드 ---------- */
.pub-thumb-ph{
  aspect-ratio:3/4;border:1px solid var(--line);border-radius:6px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  background:linear-gradient(160deg,var(--surface-2),var(--surface));
  padding:10px;text-align:center;
}
.ph-pub{color:var(--muted);font-size:.68rem;line-height:1.3;letter-spacing:.04em}
.ph-year{color:var(--accent);font-size:1.05rem;font-weight:700;letter-spacing:.02em}

/* ---------- alumni: 졸업 후 진로 강조 ---------- */
.person-role{
  color:var(--muted);font-size:.74rem;margin:0 0 8px;
  letter-spacing:.02em;opacity:.85;
}
.person-dest{
  margin-top:auto;padding:12px 16px 14px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(90,162,255,.07),rgba(90,162,255,.02));
}
.dest-label{
  display:block;font-size:.62rem;font-weight:700;letter-spacing:.16em;
  text-transform:uppercase;color:var(--accent);margin-bottom:4px;
}
.dest-name{
  display:block;font-size:.86rem;font-weight:600;color:var(--text);line-height:1.45;
}
.person.is-alumni:hover .person-dest{
  background:linear-gradient(180deg,rgba(90,162,255,.14),rgba(90,162,255,.04));
}

/* ---------- home: 지표 밴드 ---------- */
.stats-band{border-bottom:1px solid var(--line);background:var(--surface);padding:26px 0}
.stats-row{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;text-align:center}
.stat b{display:block;font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:700;color:var(--accent);line-height:1.1;letter-spacing:-.02em}
.stat span{display:block;margin-top:6px;font-size:.74rem;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
@media (max-width:820px){ .stats-row{grid-template-columns:repeat(3,1fr);gap:22px 12px} }


/* ---------- publication: 선별 논문 카드 ---------- */
.sel-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;margin-bottom:8px}
.sel-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:linear-gradient(180deg,rgba(90,162,255,.06),var(--surface));
  border:1px solid var(--line);border-radius:var(--radius);
  transition:border-color .2s,transform .2s;
}
.sel-card:hover{border-color:var(--accent-dim);transform:translateY(-2px)}
.sel-thumb{aspect-ratio:4/3;overflow:hidden;background:var(--surface-2);border-bottom:1px solid var(--line)}
.sel-thumb img{width:100%;height:100%;object-fit:cover;object-position:top;background:#fff}
.sel-thumb .pub-thumb-ph{aspect-ratio:auto;height:100%;border:0;border-radius:0}
.sel-body{padding:16px 18px 20px;flex:1;display:flex;flex-direction:column}
.sel-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:0 0 8px}
.sel-meta{color:var(--accent);font-size:.78rem;font-weight:600;letter-spacing:.04em}
.sel-if{
  font-weight:600;font-size:.68rem;letter-spacing:.02em;color:var(--text);
  border:1px solid var(--accent-dim);border-radius:999px;padding:2px 9px;
  background:rgba(90,162,255,.1);
}
.sel-title{font-size:.97rem;font-weight:600;line-height:1.45;margin:0 0 8px}
.sel-title a:hover{color:var(--accent)}
.sel-authors{color:#c3c3cc;font-size:.8rem;margin:0 0 6px;line-height:1.5}
.sel-venue{color:var(--muted);font-size:.8rem;font-style:italic;margin:auto 0 0;padding-top:8px}

/* 전체 목록의 연도 구분 (선별 섹션과 구분되도록 가볍게) */
.year-label{
  margin:38px 0 14px;font-size:1.05rem;font-weight:700;color:var(--text);
  padding-bottom:8px;border-bottom:1px solid var(--line);letter-spacing:-.01em;
}
.year-label:first-of-type{margin-top:18px}

/* ---------- home: 지표 밴드 ---------- */
.stats-band{border-bottom:1px solid var(--line);background:var(--surface);padding:26px 0}
.stats-row{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;text-align:center}
.stat b{display:block;font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:700;color:var(--accent);line-height:1.1;letter-spacing:-.02em}
.stat span{display:block;margin-top:6px;font-size:.72rem;color:var(--muted);letter-spacing:.05em;text-transform:uppercase}
@media (max-width:820px){ .stats-row{grid-template-columns:repeat(3,1fr);gap:22px 12px} }

/* ---------- 교수 페이지 버튼 ---------- */
.prof-actions{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0 0}
.prof-actions .cta{margin-top:0;padding:11px 20px;font-size:.88rem}

/* ---------- 과제 하이라이트 (뱃지 없이) ---------- */
.project.is-featured{
  border-left:2px solid var(--accent-dim);padding-left:20px;
  background:linear-gradient(90deg,rgba(90,162,255,.06),transparent 50%);
}

/* 학력 타임라인의 논문 제목 등 부가 설명 */
.tl-note{display:block;margin-top:5px;color:var(--muted);font-size:.83rem;opacity:.85}
.tl-note em{font-style:italic}

/* ---------- 히어로 배경 영상 (비인터랙티브) ---------- */
.hero-media{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero-media video{
  width:100%;height:100%;object-fit:cover;object-position:72% 50%;display:block;
}
@media (max-width:820px){
  .hero-media video{object-position:66% 50%}
}

/* ---------- hero 3D visuals (Three.js 파티클 씬) ---------- */
.hero-visual{
  position:absolute;inset:0;z-index:0;pointer-events:none;
  opacity:0;transition:opacity 1.2s ease;
}
.hero-visual.is-on{opacity:1}
.hero-visual canvas{width:100%;height:100%;display:block}

.home-hero{position:relative;overflow:hidden}
.home-hero::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    linear-gradient(90deg,rgba(0,0,0,.66),rgba(0,0,0,.25) 46%,transparent 68%),
    linear-gradient(180deg,transparent 55%,rgba(0,0,0,.8));
}
.home-hero .wrap{position:relative;z-index:2}

/* ---------- 홈 히어로 단체사진 (화면 가득 채우는 크로스페이드) ----------
   .home-hero::after / .home-hero{min-height} 를 덮어써야 하므로 반드시 그 뒤에 온다 */
.home-hero--photo{
  min-height:min(94vh,1000px);
  align-items:flex-end;
  padding:120px 0 92px;
  background:#05070b;
}
.hero-photos{overflow:hidden}
.hero-photo{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;object-position:50% 42%;display:block;
  opacity:0;transition:opacity 1.1s ease;
}
.hero-photo.is-on{opacity:1}
/* 아주 느린 확대 — 정지 사진이 배너처럼 살아 보이도록 */
@media (prefers-reduced-motion: no-preference){
  .hero-photo.is-on{animation:hero-drift 15s ease-out forwards}
}
@keyframes hero-drift{from{transform:scale(1.06)}to{transform:scale(1)}}

/* 사진 위 텍스트 가독성 — 좌측/하단이 더 어둡게 */
.home-hero--photo::after{
  background:
    linear-gradient(90deg,rgba(0,0,0,.78),rgba(0,0,0,.45) 42%,rgba(0,0,0,.12) 72%),
    linear-gradient(180deg,rgba(0,0,0,.45),transparent 30%,rgba(0,0,0,.82));
}
.home-hero--photo h1{text-shadow:0 2px 24px rgba(0,0,0,.5)}
.home-hero--photo .lead{color:#ccd3e0;text-shadow:0 1px 14px rgba(0,0,0,.55)}

/* 사진 전환 인디케이터 */
.hero-dots{
  position:absolute;left:0;right:0;bottom:22px;z-index:3;
  display:flex;justify-content:center;gap:9px;
}
.hero-dot{
  width:8px;height:8px;padding:0;border-radius:50%;cursor:pointer;
  border:1px solid rgba(255,255,255,.55);background:transparent;
  transition:background .22s,width .22s,border-radius .22s;
}
.hero-dot.is-on{background:#fff;width:22px;border-radius:999px}
.hero-dot:hover{background:rgba(255,255,255,.6)}

.page-hero.has-visual{
  position:relative;overflow:hidden;
  padding:118px 0 64px;min-height:340px;
  display:flex;align-items:flex-end;
}
.page-hero.has-visual .wrap{position:relative;z-index:2;width:100%}
.page-hero.has-visual::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    linear-gradient(90deg,rgba(0,0,0,.6),rgba(0,0,0,.2) 45%,transparent 70%),
    linear-gradient(180deg,transparent 45%,rgba(0,0,0,.78));
}
@media (max-width:820px){
  .page-hero.has-visual{padding:96px 0 48px;min-height:280px}
}

/* ---------- 소개 배너 (Apple/AI-startup 스타일 히어로) ---------- */
.is-banner{text-align:center}
.home-hero.is-banner{
  min-height:min(88vh,940px);align-items:flex-start;
  padding-top:max(11vh,84px);
}
.page-hero.has-visual.is-banner{
  min-height:min(66vh,680px);align-items:flex-start;
  display:block;padding:92px 0 150px;
}
.banner-wrap{
  position:relative;z-index:2;max-width:1000px;margin:0 auto;
  display:flex;flex-direction:column;align-items:center;
}
.home-hero.is-banner h1{
  font-size:clamp(2.5rem,5.9vw,4.4rem);line-height:1.07;
  margin:0 0 22px;font-weight:700;letter-spacing:-.03em;
}
.page-hero.is-banner h1{
  font-size:clamp(2rem,4.2vw,3rem);letter-spacing:-.025em;line-height:1.12;
}
.grad{
  background:linear-gradient(98deg,#8db9ff 5%,#5aa2ff 45%,#a78bfa 95%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.home-hero.is-banner .lead{margin:0 auto;max-width:62ch;font-size:clamp(1rem,1.5vw,1.16rem)}
.banner-sub{
  color:#b9c2d4;max-width:64ch;margin:16px auto 0;
  font-size:clamp(.94rem,1.35vw,1.08rem);line-height:1.75;
}
.banner-ctas{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:34px}
.banner-ctas .cta{margin-top:0;padding:12px 24px;font-size:.9rem}
.chip-row{
  list-style:none;display:flex;flex-wrap:wrap;gap:10px;justify-content:center;
  padding:0;margin:26px 0 0;
}
.chip-row li{
  font-size:.76rem;font-weight:500;letter-spacing:.06em;color:#aeb8c9;
  padding:7px 15px;border:1px solid var(--line);border-radius:999px;
  background:rgba(16,18,24,.55);backdrop-filter:blur(6px);
  transition:border-color .2s,color .2s;
}
.chip-row li:hover{border-color:var(--accent-dim);color:var(--text)}
/* 배너용 스크림: 상단 텍스트·하단 페이드 중심의 세로 그라디언트 */
.home-hero.is-banner::after,
.page-hero.has-visual.is-banner::after{
  background:
    radial-gradient(58% 46% at 50% 18%,rgba(0,0,0,.5),transparent 75%),
    linear-gradient(180deg,transparent 62%,rgba(0,0,0,.7));
}
/* 순차 등장 */
@media (prefers-reduced-motion: no-preference){
  .banner-wrap > *{opacity:0;transform:translateY(20px);
    animation:banner-rise .85s cubic-bezier(.22,.7,.3,1) forwards}
  .banner-wrap > *:nth-child(2){animation-delay:.1s}
  .banner-wrap > *:nth-child(3){animation-delay:.2s}
  .banner-wrap > *:nth-child(4){animation-delay:.3s}
  .banner-wrap > *:nth-child(5){animation-delay:.4s}
}
@keyframes banner-rise{to{opacity:1;transform:none}}
/* 홈 스크롤 유도 */
.scroll-cue{
  position:absolute;left:50%;bottom:30px;z-index:2;width:18px;height:18px;
  border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
  transform:translateX(-50%) rotate(45deg);opacity:.5;
  animation:cue-bounce 2.1s ease-in-out infinite;
}
@keyframes cue-bounce{
  0%,100%{transform:translateX(-50%) rotate(45deg) translate(0,0);opacity:.5}
  50%{transform:translateX(-50%) rotate(45deg) translate(5px,5px);opacity:.9}
}
@media (prefers-reduced-motion: reduce){.scroll-cue{animation:none}}
@media (max-width:820px){
  .page-hero.has-visual.is-banner{padding:84px 0 120px;min-height:520px}
  .chip-row li{font-size:.66rem;padding:6px 12px}
}

/* ==========================================================================
   라이트/다크 테마 — 헤더 토글로 전환, html.theme-light 가 라이트 모드
   변수만 바꾸면 대부분의 컴포넌트가 함께 전환된다.
   ========================================================================== */
html.theme-light{
  --bg:#ffffff;
  --surface:#f6f8fb;
  --surface-2:#eceff4;
  --line:#e3e6ec;
  --text:#191b20;
  --muted:#68717f;
  --accent:#2564c9;
  --accent-dim:#5aa2ff;
}
html.theme-light .site-header{background:rgba(255,255,255,.92)}
html.theme-light .pub-authors,
html.theme-light .sel-authors{color:#555c68}
html.theme-light .contact-map iframe{filter:none}
html.theme-light .cta{color:#fff}

/* 3D 씬이 있는 히어로는 라이트 모드에서도 다크 유지 (씬이 다크 전용) */
html.theme-light .home-hero,
html.theme-light .page-hero.has-visual{background-color:#04060a;color:#eaeaee}
html.theme-light .home-hero .lead,
html.theme-light .page-hero.has-visual .lead,
html.theme-light .page-hero.has-visual .banner-sub{color:#9ba3b2}
html.theme-light .home-hero .eyebrow,
html.theme-light .page-hero.has-visual .eyebrow{color:#5aa2ff}

/* --- 테마 토글 버튼 --- */
.header-actions{display:flex;align-items:center;gap:10px}
.theme-toggle{
  width:36px;height:36px;border-radius:50%;cursor:pointer;
  border:1px solid var(--line);background:transparent;color:var(--muted);
  display:grid;place-items:center;padding:0;
  transition:color .2s,border-color .2s,transform .3s;
}
.theme-toggle:hover{color:var(--accent);border-color:var(--accent-dim);transform:rotate(18deg)}
.theme-toggle svg{width:17px;height:17px;display:block}
.theme-toggle .icon-sun{display:none}
html.theme-light .theme-toggle .icon-sun{display:block}
html.theme-light .theme-toggle .icon-moon{display:none}

/* --- 홈 대표기술 카드 (이미지) --- */
.tech-card{display:block}
.tech-thumb{aspect-ratio:16/8;overflow:hidden;background:#fff;border-bottom:1px solid var(--line)}
.tech-thumb img{width:100%;height:100%;object-fit:cover;background:#fff;transition:transform .35s}
.tech-card:hover .tech-thumb img{transform:scale(1.045)}
.tech-body{padding:18px 22px 20px}
.tech-body h3{margin:0 0 8px}
.tech-body p{margin:0}

/* 씬 단계 캡션 (우하단 pill) */
.hero-caption{
  position:absolute;right:26px;bottom:20px;z-index:3;pointer-events:none;
  font-size:.72rem;font-weight:600;letter-spacing:.13em;text-transform:uppercase;
  color:#c7d2e2;padding:7px 15px;border:1px solid var(--line);border-radius:999px;
  background:rgba(6,8,12,.55);backdrop-filter:blur(8px);
  font-variant-numeric:tabular-nums;transition:opacity .24s;
}
.hero-caption:empty{opacity:0}
.hero-caption.is-swap{opacity:0}
@media (max-width:820px){
  .hero-caption{right:12px;bottom:10px;font-size:.6rem;padding:5px 11px;max-width:calc(100% - 24px)}
  /* 사진 히어로에는 하단 중앙에 점 인디케이터가 있어 캡션을 위로 띄운다 */
  .home-hero--photo .hero-caption{bottom:38px}
}

/* ==========================================================================
   모바일 최적화 — 전부 미디어 쿼리 내부라 데스크탑 레이아웃에는 영향 없음
   ========================================================================== */

/* 터치 기기: hover 로만 나타나던 컨트롤을 항상 표시 */
@media (hover:none){
  .news-media .news-arrow{opacity:.9}
  .news-arrow:disabled{opacity:0 !important}
}

/* 태블릿 이하: 뉴스 캐러셀이 세로 배치될 때 고정 폭 제거 — 대신 크게 유지 */
@media (max-width:900px){
  .news-media{flex:none;width:100%;max-width:640px}
  .news-cover{flex:none;width:100%;max-width:640px}
}

/* 폰 화면 */
@media (max-width:640px){
  body{overflow-wrap:anywhere}                 /* 긴 이메일·URL 넘침 방지 */
  .wrap{padding:0 18px}

  /* 최소 칼럼 폭이 화면보다 커서 생기던 가로 스크롤 제거 */
  .grid-2,.grid-3,.sel-grid,.video-grid,.fig-grid{grid-template-columns:1fr}
  .grid-4{grid-template-columns:repeat(2,1fr);gap:14px}
  .person-body{padding:12px 12px 16px}
  .person-tags li{font-size:.74rem}

  /* 히어로·본문 스케일 */
  .home-hero{min-height:54vh}
  /* 단체사진 히어로는 모바일에서도 화면을 꽉 채운다 */
  .home-hero--photo{min-height:min(82vh,720px);padding:96px 0 76px}
  .hero-photo{object-position:50% 38%}
  .home-hero h1{font-size:clamp(1.65rem,7.6vw,2.2rem)}
  .home-hero h1 br{display:none}   /* 수동 줄바꿈이 좁은 화면에서 어색한 고아 단어를 만들지 않게 */
  .page-hero{padding:52px 0 28px}
  .page-body{padding:36px 0 68px}
  h2{font-size:1.35rem;margin:40px 0 14px}
  .section-label{margin:44px 0 18px}
  .stats-band{padding:20px 0}
  .stat span{font-size:.64rem}

  /* 소개 배너: 모바일에서 과하게 높지 않게 */
  .home-hero.is-banner{min-height:min(76vh,720px);padding-top:72px}
  .page-hero.has-visual.is-banner{min-height:430px;padding:70px 0 92px}
  .banner-ctas .cta{padding:11px 20px;font-size:.85rem}

  /* 목록·카드류 여백 */
  .pub{padding:18px 0;gap:14px}
  .pub-title{font-size:1rem}
  .news-item{padding:20px 0;gap:16px}
  .project{padding:24px 0}
  .company-hero{padding:70px 0 54px}
  .contact-map iframe{height:280px}
  .footer-inner{flex-direction:column;gap:18px}
}