.chat-header {
  padding: 20px;
  background: #f9f9f9;
  border-bottom: 1px solid #ddd;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chat-header .chat-title {
  font-size: 18px;
  font-weight: 600;
  flex-shrink: 1;
  min-width: 0;
}

body.dark-mode .chat-header {
  background: #1c1c1e;
  border-bottom-color: #38383a;
}