* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #111213;
  }
  
  .chat-container {
    width: 100%;
    max-width: 420px;
    background-color: #ffffff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
  }
  
  .chat-header {
    padding: 20px;
    background-color: #3498db;
    color: #ffffff;
    text-align: center;
  }
  
  .chat-header h2 {
    margin-bottom: 4px;
  }
  
  .chat-output {
    flex: 1;
    padding: 20px;
    background-color: #131314;
    overflow-y: auto;
  }
  
  .chat-output p {
    margin-bottom: 10px;
  }
  
  .user-message,
  .bot-message {
    max-width: 70%;
    padding: 12px;
    border-radius: 20px;
    margin-bottom: 8px;
    font-size: 15px;
    line-height: 1.4;
  }
  
  .user-message {
    background-color: #2980b9;
    color: #ffffff;
    align-self: flex-end;
  }
  
  .bot-message {
    background-color: #ffffff;
    color: #2c3e50;
    border: 1px solid #bdc3c7;
    align-self: flex-start;
  }
  
  .chat-input-container {
    display: flex;
    padding: 15px;
    border-top: 1px solid #0b0b0b;
    background-color: #1a1818;
  }
  
  #user-input {
    flex: 1;
    padding: 10px;
    border-radius: 20px;
    border: 1px solid #ddd;
    font-size: 15px;
    outline: none;
    transition: border-color 0.2s;
  }
  
  #user-input:focus {
    border-color: #3498db;
  }
  
  button {
    background-color: #3498db;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 20px;
    margin-left: 10px;
    cursor: pointer;
    font-size: 15px;
    transition: background-color 0.2s;
  }
  
  button:hover {
    background-color: #2980b9;
  }