/* ===== MFL Lab — 정적 사이트 스타일 ===== */
:root{
  --navy:#11213a;
  --navy-2:#1b3357;
  --accent:#2bb3a3;
  --accent-d:#1f8b7e;
  --ink:#1c2733;
  --muted:#5f6c7b;
  --line:#e6eaef;
  --bg-soft:#f6f8fa;
  --maxw:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Segoe UI","Malgun Gothic","Noto Sans KR",sans-serif;
  line-height:1.65;-webkit-font-smoothing:antialiased;
}
a{color:var(--accent-d);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}

/* ===== Nav ===== */
.nav{position:sticky;top:0;z-index:50;background:var(--navy);box-shadow:0 1px 12px rgba(0,0,0,.18)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:0 22px;display:flex;align-items:center;justify-content:space-between;height:64px}
.brand img{height:38px;width:auto}
.nav-links{display:flex;gap:22px;align-items:center}
.nav-links a{color:#dfe6ef;font-size:.86rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;padding:6px 2px;border-bottom:2px solid transparent;transition:.18s}
.nav-links a:hover{color:#fff;text-decoration:none;border-color:var(--accent)}
.nav-links a.active{color:#fff;border-color:var(--accent)}
.nav-toggle{display:none;background:none;border:0;color:#fff;font-size:1.5rem;cursor:pointer}

/* ===== Hero ===== */
.hero{position:relative;min-height:300px;display:flex;align-items:center;
  background:url("images/hero.jpg") center/cover no-repeat;}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(120deg,rgba(11,22,40,.86),rgba(20,52,80,.62))}
.hero-text{position:relative;max-width:var(--maxw);margin:0 auto;padding:64px 22px;color:#fff;width:100%}
.hero-text h1{margin:0;font-size:2.5rem;font-weight:800;line-height:1.18;letter-spacing:-.01em;
  text-shadow:0 2px 18px rgba(0,0,0,.35)}
.hero-text p{margin:.8rem 0 0;font-size:1.05rem;color:#d7e2ee;font-weight:500}

/* ===== Layout ===== */
.container{max-width:var(--maxw);margin:0 auto;padding:10px 22px 60px}
.section{padding:38px 0;border-bottom:1px solid var(--line)}
.section:last-child{border-bottom:0}
.section-title{font-size:1.45rem;font-weight:700;color:var(--navy);margin:0 0 22px;position:relative;padding-left:14px}
.section-title::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:5px;border-radius:3px;background:var(--accent)}
.lead{font-size:1.12rem;color:var(--ink);margin:0 0 26px}
.muted{color:var(--muted);font-size:.92em}

/* HOME cards */
.cards-2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.info-card{background:var(--bg-soft);border:1px solid var(--line);border-radius:14px;padding:26px}
.info-card h3{margin:0 0 10px;color:var(--navy);font-size:1.18rem}
.info-card p{margin:0;color:var(--muted)}

/* ===== Members / Alumni ===== */
.member-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:22px}
.member-card{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;
  transition:.18s;align-items:flex-start}
.member-card:hover{box-shadow:0 8px 28px rgba(17,33,58,.10);transform:translateY(-2px)}
.member-card.pi{max-width:560px}
.member-photo{flex:0 0 96px;width:96px;height:120px;border-radius:10px;overflow:hidden;background:var(--bg-soft)}
.member-photo img{width:100%;height:100%;object-fit:cover}
.member-info{min-width:0}
.member-info h3{margin:0 0 6px;font-size:1.08rem;color:var(--navy)}
.member-info h3 .en{font-weight:500;color:var(--muted);font-size:.86em}
.member-info p{margin:2px 0;font-size:.9rem;color:var(--ink)}
.member-info .role{color:var(--accent-d);font-weight:600}
.member-info .email a{font-size:.86rem}
.member-info .present{color:var(--muted)}
.scholar{font-size:.78rem;font-weight:600}

/* ===== Publications / Patents ===== */
.pub-list{list-style:none;margin:0;padding:0}
.pub-item,.pat-item{display:flex;gap:16px;padding:16px 0;border-bottom:1px solid var(--line)}
.pub-item:last-child,.pat-item:last-child{border-bottom:0}
.pub-num{flex:0 0 38px;height:38px;border-radius:50%;background:var(--navy);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:.82rem;font-weight:700}
.pub-body{min-width:0;flex:1}
.pub-fig{flex:0 0 140px;display:block;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--bg-soft)}
.pub-fig img{width:140px;height:100px;object-fit:contain;transition:.2s}
.pub-fig:hover img{transform:scale(1.05)}
.pub-title{display:block;margin:0 0 4px;font-weight:600;color:var(--ink)}
a.pub-title{transition:.15s}
a.pub-title:hover{color:var(--accent-d);text-decoration:none}
.link-icon{color:var(--accent);font-weight:700;font-size:.9em}
.pub-authors,.pat-meta{margin:2px 0 0;font-size:.88rem;color:var(--muted)}

/* ===== News ===== */
.news-list{list-style:none;margin:0;padding:0}
.news-item{display:flex;gap:18px;padding:16px 0;border-bottom:1px solid var(--line);align-items:baseline}
.news-item:last-child{border-bottom:0}
.news-date{flex:0 0 130px;font-weight:700;color:var(--accent-d);font-size:.92rem}
.news-body{color:var(--ink)}

/* ===== Gallery ===== */
.event-list{margin:0;padding-left:20px;color:var(--ink)}
.event-list li{margin:7px 0}
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.gphoto{display:block;border-radius:10px;overflow:hidden;aspect-ratio:4/3;background:var(--bg-soft)}
.gphoto img{width:100%;height:100%;object-fit:cover;transition:.25s}
.gphoto:hover img{transform:scale(1.05)}

.empty-state{padding:60px;text-align:center;color:var(--muted);background:var(--bg-soft);border-radius:14px}

/* ===== Footer ===== */
.footer{background:var(--navy);color:#c7d2df;margin-top:20px}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:32px 22px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:.9rem}
.footer a{color:#9fe5db}

/* ===== Responsive ===== */
@media(max-width:760px){
  .nav-toggle{display:block}
  .nav-links{position:absolute;top:64px;left:0;right:0;background:var(--navy);flex-direction:column;
    gap:0;padding:8px 0;display:none;border-top:1px solid rgba(255,255,255,.08)}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 22px;width:100%;border-bottom:0;border-left:3px solid transparent}
  .nav-links a.active,.nav-links a:hover{border-left-color:var(--accent);border-bottom:0}
  .hero-text h1{font-size:1.7rem}
  .cards-2{grid-template-columns:1fr}
  .news-item{flex-direction:column;gap:2px}
  .news-date{flex:none}
  .footer-inner{flex-direction:column}
}