.topic-button {
  display: inline-block;
  padding: 5px 12px;
  margin: 3px;
  border-radius: 999px;
  background: #eef4ff;
  color: #1d4ed8;
  text-decoration: none;
  font-size: 0.95em;
  transition: background 0.2s ease;
}

.topic-button:hover {
  background: #dbeafe;
  text-decoration: none;
}