body {
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  display: flex;
  height: 100vh;
  justify-content: center;
  align-items: center;
}

.chat-container {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  width: 350px;
  padding: 15px;
  display: flex;
  flex-direction: column;
}

.chat-window {
  height: 300px;
  overflow-y: auto;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 10px;
  margin-bottom: 10px;
  background: #fafafa;
}

.message {
  margin-bottom: 10px;
  padding: 5px 8px;
  border-radius: 4px;
  background: #e6e8ff;
}

#chat-form {
  display: flex;
}

#chat-input {
  flex: 1;
  padding: 8px;
  font-size: 1em;
  border: 1px solid #aaa;
  border-radius: 4px 0 0 4px;
  outline: none;
}

#chat-form button {
  padding: 8px 16px;
  font-size: 1em;
  border: 1px solid #aaa;
  border-left: none;
  background: #4c69ff;
  color: #fff;
  border-radius: 0 4px 4px 0;
  cursor: pointer;
}