:root {
  --bg: #0d1117;
  --card: #161b22;
  --fg: #e6edf3;
  --muted: #8b949e;
  --link: #58a6ff;
  --border: #30363d;
  --accent: #1f6feb;
}

/* Reset + base styling */
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
}

/* Layout container */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

/* Navbar */
header {
  border-bottom: 1px solid var(--border);
  background: var(--card);
  position: sticky;
  top: 0;
  z-index: 5;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

nav {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  gap: 16px;
  padding: 10px 16px;
  overflow-x: auto;
}

nav a {
  color: var(--fg);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 8px;
  transition: background 0.2s ease;
}

nav a.active,
nav a:hover {
  background: var(--border);
}

/* Headings + text */
h1, h2, h3 {
  color: var(--fg);
  margin-top: 24px;
}
p, li { color: var(--muted); }
p.lead {
  font-size: 18px;
  color: var(--fg);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: var(--fg);
  transition: all 0.2s ease;
}
.btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Cards + grid */
.grid {
  display: grid;
  gap: 14px;
}
.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.4);
}
.card h3 {
  margin: 0 0 6px;
  color: var(--fg);
}

/* Footer */
footer {
  margin-top: 40px;
  color: var(--muted);
  font-size: 14px;
  border-top: 1px solid var(--border);
  padding-top: 10px;
}

/* Avatar */
img.avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent);
  box-shadow: 0 0 12px rgba(31,111,235,0.4);
}

/* ===== Publications ===== */
.section-title { font-size: 32px; margin-top: 12px; }
.year { font-size: 22px; margin: 20px 0 10px; color: var(--fg); }

.pub-list { display: grid; gap: 16px; }

.pub-card {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.pub-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 6px 16px rgba(0,0,0,.35);
}

.pub-thumb, .pub-thumb img {
  width: 120px; height: 80px; border-radius: 10px; object-fit: cover;
  background: linear-gradient(145deg, #222 0%, #111 100%);
  border: 1px solid var(--border);
}

/* when no image is supplied, show a subtle placeholder */
.pub-thumb.placeholder { display: grid; place-items: center; color: var(--muted); font-size: 12px; }

.pub-title { margin: 0 0 6px; font-size: 20px; color: var(--fg); }
.pub-venue { margin: 0 0 10px; color: var(--muted); }
.pub-venue a { color: var(--link); text-decoration: none; }
.pub-venue a:hover { text-decoration: underline; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-block; padding: 4px 10px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--muted); font-size: 12px;
  background: rgba(255,255,255,0.03);
}
.badge {
  background: #e3b341; color: #111; border: 0; font-weight: 600;
}
.pub-actions { margin-top: 8px; display: flex; gap: 10px; }
.pub-actions a { color: var(--link); text-decoration: none; }
.pub-actions a:hover { text-decoration: underline; }

/* mobile */
@media (max-width: 560px) {
  .pub-card { grid-template-columns: 1fr; }
  .pub-thumb, .pub-thumb img { width: 100%; height: 140px; }
}