* {
    box-sizing: border-box;
  }
  
  .row {
    display: flex;
     }
  
  .column {
    float: left;
    width: 33.33%;
    padding: 5px; 
 
    
  }
  
  /* Clearfix (clear floats) */
  .row::after {
    content: "";
    clear: both;
    display: table;
  }

  .img {
    width: 70%;
  
  }

  @media screen and (max-width: 800px) {
    .column {
      -ms-flex: 50%;
      flex: 50%;
      max-width: 50%;
    }
  }
 
  /* Responsive layout - makes the two columns stack on top of each other instead of next to each other */
  @media screen and (max-width: 600px) {
    .column {
      -ms-flex: 100%;
      flex: 100%;
      max-width: 100%;
    }
  }
@media only screen and (max-width: 600px) {
    nav{
        float: none;
        text-align: center;
    }
    nav li {
        display: block;
    }
    .grid-container {
        grid-template-columns: auto;
        margin-top: 150px;}
    }