* {
    box-sizing: border-box;
  }
  
  body {
    margin: 0;
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #222;
    background: #f5f5f5;
  }
  
  .container {
    width: 90%;
    max-width: 1100px;
    margin: auto;
  }
  
  header {
    background: #111;
    color: white;
    padding: 50px 0;
  }
  
  header h1 {
    margin: 0;
    font-size: 42px;
  }
  
  header p {
    font-size: 18px;
  }
  
  main {
    background: white;
    padding: 40px;
    margin-top: 30px;
  }
  
  article {
    padding: 20px 0;
    border-bottom: 1px solid #ddd;
  }
  
  article h3 {
    font-size: 25px;
  }
  
  footer {
    margin-top: 30px;
    padding: 25px 0;
    background: #111;
    color: white;
    text-align: center;
  }