body {
  margin: 0;
  font-family: 'Arial', sans-serif;
  background-color: #0f0f14;
  color: #e0e0e0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.chat-container {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 480px;
  height: 90vh;
  border-radius: 12px;
  background-color: #1a1a22;
  padding: 16px;
  box-sizing: border-box;
}

.chat-window {
  flex: 1;
  overflow-y: auto;
  margin-bottom: 12px;
  padding: 12px;
  border: 1px solid #2a2a36;
  border-radius: 8px;
  background-color: #14141b;
}

.chat-message {
  margin-bottom: 10px;
  line-height: 1.4;
}

.chat-message.user {
  color: #7aaeff;
}

.chat-message.assistant {
  color: #ffffff;
}

.chat-controls {
  display: flex;
  flex-direction: column;
}

#model-select {
  margin-bottom: 8px;
  padding: 6px;
  border-radius: 6px;
  border: none;
  background-color: #2a2a36;
  color: #e0e0e0;
}

#user-message {
  resize: none;
  padding: 8px;
  border-radius: 6px;
  border: none;
  background-color: #2a2a36;
  color: #e0e0e0;
  margin-bottom: 6px;
  min-height: 50px;
}

button {
  padding: 8px;
  margin-bottom: 6px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-weight: bold;
}

#send-btn {
  background-color: #4a90ff;
  color: #fff;
}

#clear-btn {
  background-color: #5a5a5a;
  color: #fff;
}

@media (max-width: 500px) {
  .chat-container {
    width: 95%;
    height: 95vh;
    padding: 12px;
  }

  #user-message {
    min-height: 70px;
  }
}