.sm-chat {
  border: 1px solid #ddd;
  border-radius: 8px;
  max-width: 480px;
  height: 500px;
  display: flex;
  flex-direction: column;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #fff;
}

.sm-messages {
  flex: 1;
  padding: 12px;
  overflow-y: auto;
  background: #fafafa;
}

.sm-message {
  margin-bottom: 8px;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 14px;
  line-height: 1.4;
  max-width: 90%;
}

.sm-user {
  background: #e0f0ff;
  margin-left: auto;
}

.sm-assistant {
  background: #ffffff;
  border: 1px solid #eee;
  margin-right: auto;
}

.sm-input-row {
  display: flex;
  border-top: 1px solid #ddd;
}

.sm-input {
  flex: 1;
  border: none;
  padding: 10px;
  resize: none;
  font-size: 14px;
}

.sm-input:focus {
  outline: none;
}

.sm-send {
  border: none;
  padding: 0 16px;
  cursor: pointer;
  font-weight: 600;
  background: #0073aa;
  color: #fff;
}

.sm-send:hover {
  opacity: 0.9;
}