/* Reset some default styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
  }
  
  header {
    background-color: #333;
    color: #fff;
    padding: 20px;
    text-align: center;
  }
  
  header h1 {
    margin-bottom: 10px;
  }
  
  nav ul {
    list-style: none;
  }
  
  nav ul li {
    display: inline;
    margin-right: 20px;
  }
  
  nav ul li a {
    color: #fff;
    text-decoration: none;
  }
  
  main {
    padding: 20px;
  }
  
  .products {
    display: flex;
    flex-wrap: wrap;
  }
  
  .product {
    width: calc(33.33% - 20px);
    margin: 0 10px 20px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
  }
  
  .product img {
    max-width: 100%;
    height: auto;
  }
  
  .product h3 {
    margin-top: 10px;
  }
  
  .product p {
    margin-bottom: 10px;
  }
  
  footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 20px;
    position: fixed;
    bottom: 0;
    width: 100%;
  }