body {
    margin: 0;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: linear-gradient(45deg, rgb(2, 2, 19), rgb(9, 213, 172), pink, rgb(113, 3, 58));
    background-size: 400% 400%;
    animation: gradientAnimation 15s ease infinite;
  }
  
  @keyframes gradientAnimation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }
  
  header {
    /* background-color: #013b32; */
    color: white;
    padding: 10px 0;
    text-align: center;
  }
  
  nav ul {
    display: flex;
    justify-content: center ;
    list-style: none;
    margin: 0;
    padding: 0;
    flex-wrap: wrap;
    /* background-color: #2a9d8f; */
  }
  
  nav ul li {
    margin: 10px 10px;
    padding: 20px;
   
  }
  
  nav ul li a {
    color: white;
    text-decoration: none;
    padding: 30px 10px;
    border: 10px outset black;
    border-radius: 50%;
    box-shadow: 10px 10px 10px #EEE;
  }

  
  
  main {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    padding: 10px;
    flex: 1;
  }
  
  .box {
    height: 300px;
  }
  
  .box1 { background-color: #10c844; }
  .box2 { background-color: #5bd732; }
  .box3 { background-color: #0dee8c; }
  .box4 { background-color: #457b9d; }
  .box5 { background-color: #1d3557; }
  .box6 { background-color: #2a9d8f; }
  
  footer {
    background-color: #264653;
    color: white;
    text-align: center;
    padding: 10px 0;
  }
  
  @media (max-width: 768px) {
    nav ul {
      flex-direction: column;
    }
  
    main {
      grid-template-columns: 1fr;
    }
  
    .box {
      height: 100px;
    }
  }