:root {
  /* Apple System Colors */
  --bg-body: #f5f5f7;
  --bg-card: #ffffff;
  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --accent-blue: #0066cc;
  --btn-bg: #e8e8ed;
  --btn-hover: #d2d2d7;
  
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-hover: 0 12px 30px rgba(0,0,0,0.12);
  
  --radius: 18px;
  --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}

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

body {
  background-color: var(--bg-body);
  color: var(--text-primary);
  font-family: var(--font-stack);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: var(--accent-blue); transition: 0.2s; }
a:hover { color: #004499; }

/* --- LAYOUT --- */
.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 60px 40px;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 50px;
}

/* --- SIDEBAR --- */
.sidebar {
  position: sticky;
  top: 40px;
  height: fit-content;
}

.profile-card {
  background: var(--bg-card);
  padding: 30px 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.avatar {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: 15px;
  border: 1px solid rgba(0,0,0,0.05);
}

.name { font-size: 22px; font-weight: 700; margin-bottom: 4px; color: #000; }
.role { font-size: 14px; color: var(--text-secondary); margin-bottom: 20px; }

.social-links { display: flex; justify-content: center; gap: 12px; margin-top: 15px; }
.social-btn {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  background: var(--btn-bg);
  border-radius: 50%;
  color: #333;
  transition: 0.2s;
}
.social-btn:hover { background: #333; color: #fff; transform: scale(1.1); }

.nav-menu { margin-top: 30px; text-align: left; list-style: none; }
.nav-link {
  display: block; padding: 8px 12px;
  color: var(--text-secondary);
  font-weight: 500; font-size: 14px;
  border-radius: 8px;
}
.nav-link:hover, .nav-link.active { background: rgba(0,0,0,0.04); color: #000; }

/* --- MAIN CONTENT --- */
section { margin-bottom: 50px; scroll-margin-top: 50px; }

h2 {
  font-size: 26px; font-weight: 700;
  margin-bottom: 20px; color: #000;
  letter-spacing: -0.01em;
}

/* --- NEWS SCROLLABLE (Updated) --- */
.news-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.news-scroll-area {
  max-height: 320px; /* Scrollable news list */
  overflow-y: auto;  /* Adds vertical scroll */
  padding-right: 10px; /* Avoid scrollbar covering text */
}

/* Custom macOS-style Scrollbar */
.news-scroll-area::-webkit-scrollbar { width: 6px; }
.news-scroll-area::-webkit-scrollbar-track { background: transparent; }
.news-scroll-area::-webkit-scrollbar-thumb {
  background-color: rgba(0,0,0,0.1);
  border-radius: 10px;
}
.news-scroll-area:hover::-webkit-scrollbar-thumb { background-color: rgba(0,0,0,0.3); }

.news-item {
  display: grid;
  grid-template-columns: 85px 1fr;
  margin-bottom: 12px;
  font-size: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid #f0f0f0;
}
.news-item:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.news-date { color: var(--text-secondary); font-variant-numeric: tabular-nums; font-weight: 500; }

/* --- TOPIC HEADERS (Updated) --- */
.topic-title {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  font-weight: 600;
  margin: 30px 0 15px 0;
  border-bottom: 1px solid #e5e5e5;
  padding-bottom: 8px;
}

/* --- PAPER CARDS --- */
.paper-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  display: flex;
  gap: 25px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  border: 1px solid rgba(0,0,0,0.02);
}

.paper-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

/* Fixed 16:9 Landscape Ratio Container */
.paper-img {
  width: 240px; /* Wider to avoid crop */
  height: 135px; /* 16:9 Aspect Ratio */
  flex-shrink: 0;
  border-radius: 10px;
  overflow: hidden;
  background: #000;
  position: relative;
  border: 1px solid rgba(0,0,0,0.05);
}
  
.paper-img img, .paper-img video {
  width: 100%; height: 100%;
  object-fit: cover; /* Change to 'contain' if you want zero crop, but 'cover' looks better */
}

.paper-content { flex: 1; display: flex; flex-direction: column; justify-content: center; }

.paper-title { font-size: 18px; font-weight: 600; margin-bottom: 6px; line-height: 1.35; color: #000; }
.paper-authors { font-size: 14px; color: var(--text-secondary); margin-bottom: 10px; line-height: 1.5; }
  
/* Venue + Year / Rate / IF in one row */
.paper-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 2px;
}

.paper-venue {
  font-size: 12px;
  font-weight: 600;
  color: #000;
  background: #f2f2f7;
  padding: 4px 10px;
  border-radius: 6px;
  display: inline-block;
}
.paper-venue.highlight { background: rgba(0, 102, 204, 0.1); color: var(--accent-blue); }

.paper-meta-item {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 6px;
  display: inline-block;
  font-weight: 500;
}
.paper-meta-item.paper-year {
  background: rgba(52, 199, 89, 0.15);
  color: #1a7c37;
}
.paper-meta-item.paper-rate {
  background: rgba(255, 149, 0, 0.2);
  color: #c93400;
}
.paper-meta-item.paper-if {
  background: rgba(88, 86, 214, 0.15);
  color: #4a47a3;
}

.btn-row { margin-top: 12px; display: flex; gap: 10px; }
.btn-pill {
  font-size: 12px; font-weight: 600;
  padding: 5px 12px;
  background: var(--btn-bg); color: #333;
  border-radius: 20px; display: flex; align-items: center; gap: 5px;
  transition: 0.2s;
}
.btn-pill:hover { background: #d1d1d6; color: #000; }

.badge-count {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-left: 2px;
}

/* --- GENERIC TEXT / CARD UTILITIES --- */
.section-note {
  font-size: 13px;
  color: var(--text-secondary);
  margin: -8px 0 20px 0;
}

.mt-12 {
  margin-top: 12px;
}

.info-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
}

.awards-list {
  padding-left: 20px;
  font-size: 15px;
  color: #333;
  line-height: 2;
}

.info-list {
  padding-left: 20px;
  font-size: 14px;
  color: #333;
  line-height: 1.9;
  margin-bottom: 18px;
}

.info-list--spaced {
  line-height: 2;
  margin-bottom: 20px;
}

.section-label {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  font-weight: 600;
  margin-bottom: 8px;
}

.grants-text {
  font-size: 14px;
  color: #333;
  line-height: 1.8;
}

/* --- INTERNSHIPS --- */
.internships-card {
  padding: 10px 20px;
}

.internship-item {
  display: flex;
  gap: 15px;
  padding: 15px 0;
  border-bottom: 1px solid #f0f0f0;
}

.internship-item:last-child {
  border-bottom: none;
}

.internship-logo {
  width: 45px;
  height: 45px;
  background: #fff;
  padding: 5px;
  border-radius: 8px;
  border: 1px solid #eee;
  flex-shrink: 0;
}

.internship-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.internship-title {
  font-weight: 600;
}

.internship-time {
  font-size: 12px;
  color: #999;
}

/* --- PUBLICATIONS FULL LIST LINK --- */
.pub-full-list { font-weight: 400; font-size: 16px; color: var(--text-secondary); }

/* --- FOOTER --- */
.site-footer { margin-top: 60px; text-align: center; }
.footer-copy { font-size: 12px; color: #999; margin: 0; }
.footer-map { width: 30%; margin: 0 auto; margin-top: 12px; }

/* --- MOBILE NAV (anchor bar, shown only on small screens) --- */
.mobile-nav {
  display: none;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  padding: 12px 0;
  border-bottom: 1px solid #e5e5e5;
  margin-bottom: 24px;
  list-style: none;
}
.mobile-nav .nav-link {
  font-size: 13px;
  padding: 6px 10px;
}

/* --- RESPONSIVE --- */
@media (max-width: 800px) {
  .container { grid-template-columns: 1fr; padding: 20px; gap: 30px; }
  .sidebar { position: static; margin-bottom: 20px; }
  .paper-card { flex-direction: column; gap: 15px; }
  .paper-img { width: 100%; height: auto; aspect-ratio: 16/9; }
  .nav-menu { display: none; }
  .mobile-nav { display: flex; }
  .footer-map { width: 90%; }
}