/* 학술 홈페이지 전역 스타일 (단일 컬럼 레이아웃, 반응형, Publication 카드) */

:root {
  --accent: #2b6cb0;
  --accent-soft: #ebf4ff;
  --text: #1a202c;
  --text-muted: #4a5568;
  --border: #e2e8f0;
  --badge-bg: #4a5568;
  --max-width: 820px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  line-height: 1.65;
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== Navigation ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.nav-brand:hover { text-decoration: none; }
.nav-links { list-style: none; display: flex; gap: 1.5rem; margin: 0; padding: 0; }
.nav-links a { color: var(--text-muted); font-weight: 500; }
.nav-links a:hover { color: var(--accent); text-decoration: none; }
.nav-toggle {
  display: none;
  background: none; border: none;
  font-size: 1.25rem; cursor: pointer; color: var(--text);
}

/* ===== Layout ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 1rem;
}
section { margin-bottom: 3rem; }
section h2 {
  font-size: 1.4rem;
  margin: 0 0 1.25rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--border);
}

/* ===== Intro ===== */
.intro {
  display: flex;
  gap: 2rem;
  align-items: center;
  margin-bottom: 3rem;
}
.intro-text { flex: 1; }
.intro-text h1 { font-size: 2rem; margin: 0 0 0.3rem; }
.affiliation { color: var(--text-muted); margin: 0 0 1rem; font-size: 1rem; }
.bio { margin: 0 0 1.2rem; }
.intro-photo { flex: 0 0 180px; }
.intro-photo img {
  display: block;
  width: 180px; height: 180px;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
}

/* ===== Social icons ===== */
.social { display: flex; gap: 1rem; font-size: 1.4rem; }
.intro-photo .social { justify-content: center; margin-top: 0.5rem; line-height: 1; }
.social a { color: var(--text-muted); transition: color 0.15s ease; }
.social a:hover { color: var(--accent); text-decoration: none; }

/* ===== News ===== */
/* (3) 4줄 정도 보이고 다음 줄이 반쯤 걸치도록 높이 조정 */
.news-wrap { position: relative; }
.news-scroll {
  max-height: 175px;
  overflow-y: scroll;
  padding-right: 0.75rem;
  scrollbar-width: thin;
  scrollbar-color: var(--text-muted) var(--border);
}
/* (2) 스크롤바 트랙을 항상 보이게 */
.news-scroll::-webkit-scrollbar { width: 9px; }
.news-scroll::-webkit-scrollbar-track {
  background: var(--border);
  border-radius: 4px;
}
.news-scroll::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 4px;
}
/* (1) 하단 페이드 — 아래에 더 있음을 암시 */
.news-wrap::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 36px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0), #fff);
  pointer-events: none;
}
/* (4) "↓ scroll for more" 힌트 */
.news-hint {
  margin: 0.5rem 0 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.news-table { width: 100%; border-collapse: collapse; }
.news-table th {
  text-align: left;
  vertical-align: top;
  width: 110px;
  padding: 0.4rem 1rem 0.4rem 0;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}
.news-table td { vertical-align: top; padding: 0.4rem 0; }

/* ===== Publications ===== */
.pub-note { color: var(--text-muted); font-size: 0.9rem; margin: -0.5rem 0 1.25rem; }
.pub-more { margin-top: 1.5rem; font-weight: 600; }
.pub-note span { color: #c53030; }
.pub-list { list-style: none; margin: 0; padding: 0; }
.pub-item {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}
.pub-item:last-child { border-bottom: none; }
.pub-badge {
  flex: 0 0 96px;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  align-items: flex-start;
}
.badge {
  display: inline-block;
  background: var(--badge-bg);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 5px;
  white-space: nowrap;
}
.badge-journal { background: #2f855a; }
.badge-workshop { background: #6b46c1; }
.badge-award { background: #c05621; }

.pub-body { flex: 1; min-width: 0; }
.pub-title { font-weight: 600; margin-bottom: 0.2rem; }
.pub-author { color: var(--text); font-size: 0.95rem; }
.pub-venue { color: var(--text-muted); font-style: italic; font-size: 0.9rem; margin-top: 0.1rem; }

.pub-links { margin-top: 0.5rem; display: flex; gap: 0.4rem; flex-wrap: wrap; }
.btn {
  font-size: 0.8rem;
  font-family: inherit;
  padding: 0.18rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: #fff;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn:hover { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); text-decoration: none; }

.bibtex {
  margin-top: 0.6rem;
  background: #f7fafc;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.8rem 1rem;
  font-size: 0.8rem;
  overflow-x: auto;
  white-space: pre;
}
.hidden { display: none; }

/* ===== Experience ===== */
.exp-table { width: 100%; border-collapse: collapse; }
.exp-table td { vertical-align: top; padding: 0.5rem 0; border-bottom: 1px solid var(--border); }
.exp-table tr:last-child td { border-bottom: none; }
.exp-org { font-weight: 600; }
.exp-role { color: var(--text-muted); white-space: nowrap; padding-left: 1rem; }
.exp-date { color: var(--text-muted); text-align: right; white-space: nowrap; font-size: 0.9rem; }

/* ===== Footer ===== */
footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}
footer p { margin: 0; }
.last-updated { margin-top: 0.25rem; font-size: 0.8rem; opacity: 0.75; }

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 0.5rem 1.25rem 1rem;
  }
  .nav-links.open { display: flex; }
  .nav-links li { padding: 0.4rem 0; }

  .intro { flex-direction: column-reverse; align-items: center; text-align: center; }
  .intro-photo { flex: none; }
  .social { justify-content: center; }

  .pub-item { flex-direction: column; gap: 0.4rem; }
  .pub-badge { flex-direction: row; }

  .exp-table td { display: block; padding: 0.15rem 0; }
  .exp-role, .exp-date { padding-left: 0; text-align: left; }
  .exp-table tr { display: block; padding: 0.5rem 0; border-bottom: 1px solid var(--border); }
  .exp-table tr td { border-bottom: none; }
}