   html, body {
    margin:0px;
    height:100%;
    background-color: white;
    }
    .box {
    background: black;
    height:100%;
    z-index: -1;
    }
    body {
    font-family: "Lato", sans-serif;
    }
    .sidenav {
    height: 100%;
    width: 0;
    position: fixed;
    z-index: 4;
    top: 0;
    left: 0;
    background-color: #111;
    overflow-x: hidden;
    transition: 0.5s;
    padding-top: 60px;
    overflow: auto;
    }
    .sidenav a {
    padding: 5px 4px 5px 15px;
    text-decoration: none;
    font-size: 20px;
    color: #BFBEBE;
    display: block;
    transition: 0.3s;
    }
    .sidenav a:hover {
    color: #FFFFFF;
    }
    .sidenav .closebtn {
    position: absolute;
    top: 0;
    right: 25px;
    font-size: 36px;
    margin-left: 50px;
    }
    .sidenav .nextbtn {
    font-size: 18px;
    text-align: left;
    padding: 5px 5px 5px 20px;
    }
    @media screen and (max-height: 450px) {
    .sidenav {padding-top: 15px;}
    .sidenav a {font-size: 18px;}
    }
    .openn {
    color: aliceblue;
    font-size:30px;
    cursor:pointer;
    z-index: 5;
    position: absolute;
    margin-top: 0;
    background: #000000;
    border: none;
    }
    .overlay {
    position:absolute;
    top:0px;
    left:0px;
    background-color: rgba(0, 0, 0, 0);
    width: 100%;
    height: 100%;
    z-index: 2;
    }	
    #maincontainer {
    background-color: #444444;
    color: white;
    padding-bottom: 50px;
    }