/* ── LAIBI Lab Homepage Styles ── */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&family=Roboto+Slab:wght@400;700&display=swap');

:root {
  --blue: #1a3a6b;
  --blue-light: #2c5aa0;
  --blue-dark: #0f2444;
  --red: #c0392b;
  --gray: #555;
  --gray-light: #888;
  --gray-border: #b7c6d4;
  --bg: #ffffff;
  --bg-alt: #f8f9fa;
  --font: 'Roboto', sans-serif;
  --font-serif: 'Roboto Slab', serif;
  --max-width: 1100px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  color: #333;
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden; /* 💡 핵심 해결책 1: 화면 밖으로 삐져나가는 가로 공간을 강제로 잘라내어 비율 깨짐 방지 */
}

a { color: var(--blue-light); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--red); }

img { max-width: 100%; height: auto; }

/* ── Navigation ── */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.97);
  border-bottom: 1px solid var(--gray-border);
  backdrop-filter: blur(8px);
}
.site-nav .nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px;
}
.nav-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.nav-brand img { height: 36px; }
.nav-brand span { font-family: var(--font-serif); font-size: 20px; font-weight: 700; color: var(--blue); }
.nav-links { display: flex; gap: 24px; list-style: none; }
.nav-links a {
  font-size: 14px; font-weight: 500; color: var(--gray);
  padding: 4px 0; border-bottom: 2px solid transparent; transition: all 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--blue); border-bottom-color: var(--blue); }

/* Mobile nav */
.nav-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--blue); }

/* ── Page Header ── */
.page-header {
  box-shadow: 0 0 0 100vmax #f1f3f5;
  clip-path: inset(0 -100vmax);
  background-color: #f1f3f5; 
  border-bottom: 1px solid var(--gray-border);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  text-align: left;
}
.page-header h1 { font-family: var(--font-serif); font-size: 36px; color: var(--blue); margin-bottom: 8px; }
.page-header p { font-size: 16px; color: var(--gray-light); }

/* ── Container ── */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; width: 100%; box-sizing: border-box; }

/* ── Section ── */
.section { padding: 48px 0; }
.section + .section { border-top: 1px solid var(--gray-border); }
.section-title { font-family: var(--font-serif); font-size: 28px; color: var(--blue); margin-bottom: 24px; }

/* ── Footer ── */
.site-footer { background: var(--blue-dark); color: #fff; padding: 32px 24px; margin-top: 48px; }
.footer-inner { max-width: var(--max-width); margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-info { font-size: 14px; line-height: 1.8; }
.footer-info strong { font-size: 16px; }
.footer-info span { opacity: 0.7; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: rgba(255,255,255,0.8); font-size: 14px; transition: color 0.2s; }
.footer-links a:hover { color: #fff; }
.footer-copy { text-align: center; padding: 12px 24px; background: #0a1a33; color: rgba(255,255,255,0.4); font-size: 12px; }

/* ── Cards ── */
.card {
  border: 1px solid var(--gray-border);
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
  background: #fff;
}
.card:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.08); transform: translateY(-2px); }
.card-img { width: 100%; height: 180px; object-fit: cover; background: var(--bg-alt); }
.card-body { padding: 16px; }

/* ── Badge ── */
.badge {
  display: inline-block; padding: 3px 12px; border-radius: 20px;
  font-size: 12px; font-weight: 500; color: #fff; background: var(--blue);
}
.badge--green { background: #27ae60; }
.badge--orange { background: #e67e22; }

/* ── Person Grid ── */
.people-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 24px; }
.person-card { text-align: center; }
.person-card img, .person-placeholder {
  width: 140px; height: 140px; border-radius: 50%; object-fit: cover;
  margin: 0 auto 12px; display: block; background: var(--bg-alt); border: 3px solid var(--gray-border);
}
.person-placeholder { display: flex; align-items: center; justify-content: center; color: var(--gray-light); font-size: 13px; }
.person-card h4 { font-size: 15px; color: #333; margin-bottom: 2px; }
.person-card p { font-size: 13px; color: var(--gray-light); }

/* ── Table ── */
.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.data-table th { text-align: left; padding: 10px 8px; border-bottom: 2px solid var(--gray-border); color: var(--blue); font-weight: 600; }
.data-table td { padding: 10px 8px; border-bottom: 1px solid #f0f0f0; }
.data-table tr:hover td { background: var(--bg-alt); }

/* ── Publication Entry ── */
.pub-entry { display: flex; gap: 16px; padding: 20px 0; border-bottom: 1px solid #f0f0f0; }
.pub-entry:last-child { border-bottom: none; }
.pub-thumb { width: 100px; height: 70px; border-radius: 4px; object-fit: cover; background: var(--bg-alt); flex-shrink: 0; }
.pub-title { font-size: 16px; font-weight: 500; color: #333; margin-bottom: 4px; }
.pub-authors { font-size: 13px; color: var(--gray-light); margin-bottom: 6px; }
.pub-links { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.pub-links a { font-size: 13px; font-weight: 500; }

/* ── Filter Pills ── */
.filter-pills { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }
.filter-pill {
  padding: 5px 16px; border-radius: 20px; font-size: 13px; font-weight: 500;
  border: 1px solid var(--gray-border); color: var(--gray); background: transparent;
  cursor: pointer; transition: all 0.2s;
}
.filter-pill:hover { border-color: var(--blue); color: var(--blue); }
.filter-pill.active { background: var(--blue); color: #fff; border-color: var(--blue); }

/* ── Gallery Grid ── */
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.gallery-grid img { width: 100%; height: 200px; object-fit: cover; border-radius: 6px; cursor: pointer; transition: transform 0.2s; }
.gallery-grid img:hover { transform: scale(1.02); }

/* ── Project Grid ── */
.project-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

/* ── Hero Section (index.html 메인) ── */
.hero-content {
  display: flex;
  gap: 40px;
  align-items: flex-start;
  text-align: left;
  max-width: 70%;
}
.hero-text { flex: 1; }
.hero-logo {
  flex-shrink: 0;
  text-align: center;
  width: 380px;
}

/* =======================================================
   📱 모바일 반응형 (Responsive Design)
   ======================================================= */
@media (max-width: 768px) {
  /* 네비게이션바 변경 (햄버거 메뉴) */
  .nav-toggle { display: block; }
  .nav-links { 
    display: none; 
    flex-direction: column; 
    position: absolute; 
    top: 100%; 
    left: 0; 
    right: 0; 
    background: #fff; 
    padding: 16px 24px; 
    border-bottom: 1px solid var(--gray-border); 
    gap: 12px; 
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  }
  .nav-links.open { display: flex; }

  /* 헤더 및 섹션 폰트/여백 조절 */
  .page-header { padding: 32px 20px 24px; }
  .page-header h1 { font-size: 28px; }
  .section { padding: 32px 0; }
  .section-title { font-size: 24px; }

  /* Hero 섹션: 세로 배치, 글 먼저 → 로고 나중 */
  .hero-content {
    flex-direction: column;
    max-width: 100%;
    gap: 24px;
  }
  .hero-text { order: 1; }
  .hero-logo {
    order: 2;
    width: 100%;
    max-width: 220px;
    margin: 0 auto;
  }

  /* 💡 핵심 해결책 2: 모바일에서는 400px 강제 고정을 풀고, 스마트폰 화면 너비에 맞게 조절 */
  div[style*="width: 400px"], div[style*="width: 280px"] {
    width: 100% !important;
    max-width: 250px;
    margin: 0 auto 20px !important;
  }

  /* 가로 정렬된 요소들을 세로 정렬로 변경 (hero-content 제외) */
  div[style*="display: flex"]:not(.hero-content) { flex-direction: column !important; gap: 20px !important; }
  .pub-entry { flex-direction: column; }

  /* 푸터 변경 */
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }

  /* 그리드 아이템 1줄로 변경 */
  .people-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .gallery-grid { grid-template-columns: 1fr !important; }
  .project-grid { grid-template-columns: 1fr; }
}