.row {
    display: flex;
    flex-wrap: wrap;
    padding: 0 4px;
    }

    /* Create four equal columns that sits next to each other */
    .column {
    flex: 25%;
    max-width: 25%;
    padding: 0 4px;
    }

    .column img {
    margin-top: 8px;
    vertical-align: middle;
    width: 100%;
    }

    /* Responsive layout - makes a two column-layout instead of four columns */
    @media screen and (max-width: 800px) {
    .column {
        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 {
        flex: 100%;
        max-width: 100%;
    }
    }
    #img-caption  {
        font-size: 30px;
    }

    .center {
        display: flex;
        justify-content: center;
        align-items: center;
        text-align: center;
        height: 200px;
        border: 3px solid green;
      }

    #tribute-link {
        color: brown;
    }
    h1{
        font-family: monospace;
        font-size: 40px;
        font-weight: 600;
    }