.chat-widget {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  font-family: sans-serif;
}

.chat-widget .chat-panel {
  display: none;
  width: 320px;
  max-height: 420px;
  border: 1px solid #ccc;
  border-radius: 8px;
  background: #fff;
  flex-direction: column;
  overflow: hidden;
}

.chat-widget.open .chat-panel {
  display: flex;
}

.chat-log {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
}

.chat-message {
  margin-bottom: 0.5rem;
  padding: 0.5rem;
  border-radius: 6px;
}

.chat-message--user {
  background: #eef;
}

.chat-message--assistant {
  background: #f4f4f4;
}

.chat-message--system {
  background: #fff3cd;
}

.chat-toggle {
  border-radius: 999px;
  padding: 0.6rem 1rem;
  cursor: pointer;
}