* {
            box-sizing: border-box;
        }

        body {
            font-family: Valley sans, sans-serif;
        }

        /* Style the header */
        .header {
            background-color: #f1f1f1;
            padding: 30px;
            text-align: center;
            font-size: 35px;
        }

        .main-nav {
            background-color: #333;
            padding: 10px 16px;
        }

        .main-nav ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            gap: 20px;
        }

        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 500;
        }

        .main-nav a:hover {
            text-decoration: underline;
        }

        /* Create three unequal columns that floats next to each other */
        .column {
            float: left;
            padding: 10px;
            height: 300px;
            /* Should be removed. Only for demonstration */
        }

        /* Left and right column */
        .column.side {
            width: 25%;
        }

        /* Middle column */
        .column.middle {
            width: 50%;
        }

        /* Clear floats after the columns */
        .row:after {
            content: "";
            display: table;
            clear: both;
        }

        /* Style the footer */
        .footer {
            background-color: #f1f1f1;
            padding: 10px;
            text-align: center;
        }

        /* Responsive layout - makes the three columns stack on top of each other instead of next to each other */
        @media (max-width: 600px) {

            .column.side,
            .column.middle {
                width: 100%;
            }
        }