/* Header styles */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background-color: #333;
    color: #fff;
  }
  
  .logo img {
    height: 50px;
  }
  
  nav ul {
    display: flex;
  }
  
  nav li {
    margin: 0 10px;
  }
  
  nav a {
    color: #fff;
    text-decoration: none;
  }
  
  /* Main styles */
  main {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
  }
  
  h1 {
    font-size: 36px;
  }
  
  button {
    background-color: #333;
    color: #fff;
    border: none;
    padding: 10px 20px;
    font-size: 18px;
    cursor: pointer;
  }