main.css

body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
  }
  
  header {
    background-color: #333;
    color: #fff;
    padding: 20px;
  }
  
  nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
  }
  
  nav ul li {
    display: inline;
    margin-right: 10px;
  }
  
  nav ul li a {
    color: #fff;
    text-decoration: none;
  }
  
  main {
    background-color: #f5f5f5;
    padding: 40px 0;
  }
  
  .content {
    text-align: center;
  }
  
  .content h1 {
    font-size: 28px;
    margin-bottom: 20px;
  }
  
  .open-notepad-btn {
    padding: 10px 20px;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
    transition: background-color 0.3s;
  }
  
  .open-notepad-btn:hover {
    background-color: #0056b3;
  }
  
  footer {
    background-color: #333;
    color: #fff;
    padding: 20px;
    text-align: center;
  }