body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: #f9f9f9;
    color: #333;
  }
  
  header {
    background-color: #0078d7;
    color: #fff;
    padding: 20px;
    text-align: center;
  }
  
  header h1 {
    margin: 0;
  }
  
  main {
    max-width: 600px;
    margin: 20px auto;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }
  
  form {
    display: flex;
    flex-direction: column;
    gap: 15px;
  }
  
  label {
    font-weight: bold;
  }
  
  input {
    padding: 10px;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
  }
  
  button {
    padding: 10px 15px;
    font-size: 1rem;
    color: #fff;
    background-color: #0078d7;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }
  
  button:hover {
    background-color: #005a9e;
  }
  
  button:disabled {
    background-color: #aaa;
    cursor: not-allowed;
  }
  
  #result {
    margin-top: 20px;
    padding: 10px;
    background: #eaf6ff;
    border-left: 4px solid #0078d7;
    border-radius: 4px;
  }
  
  footer {
    text-align: center;
    padding: 10px;
    font-size: 0.9rem;
    background-color: #f1f1f1;
  }