/* Add a black background color to the top navigation */
            .topnav {
            background-color: #333;
            overflow: hidden;
            }

            /* Style the links inside the navigation bar */
            .topnav a {
            float: left;
            color: #f2f2f2;
            text-align: center;
            padding: 14px 16px;
            text-decoration: none;
            font-size: 17px;
            }

            /* Change the color of links on hover */
            .topnav a:hover {
            background-color: #ddd;
            color: black;
            }

            /* Add a color to the active/current link */
            .topnav a.active {
            background-color: #04AA6D;
            color: white;
            }

            .youtube-logo {
                width: 300px;
                height: auto;
            }