body {
  font-size: 17px;
  line-height: 1.65;
}

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

h1, h2, h3 {
  font-weight: 600;
}

img {
  border-radius: 6px;
}

details {
  margin: 1.2rem 0;
  padding: 0.8rem 1rem;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
}

summary {
  cursor: pointer;
  font-size: 1.35rem;
  font-weight: 600;
}

details[open] summary {
  margin-bottom: 0.8rem;
}

.small-text {
  font-size: 0.85em;
  color: #555;
}

.arxiv-link {
  color: #b31b1b;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid #b31b1b;
  border-radius: 4px;
  padding: 0.08em 0.35em;
  font-size: 0.85em;
}

.arxiv-link:hover {
  color: white;
  background: #b31b1b;
  text-decoration: none;
}

.last-updated {
  display: block;
  margin-top: 2.5rem;
  font-size: 0.85em;
  color: #777;
  text-align: right;
}