body {
    font-family: "Lato", sans-serif;
}

h1 {
    color: #2196F3;
}

.sidenav {
    height: 1650px;
    width: 260px;
    position: absolute;
    z-index: 1;
    top: 10;
    left: 10;
    background-color: #e9e9e9;
    /*overflow-x: hidden;*/
    padding-top: 20px;
}

.sidenav a.large {
    padding: 3px 2px 3px 2px;
    text-decoration: none;
    font-size: 22px;
    color: #818181;
    display: block;
}

/* Style the "active" element to highlight the current page */
.sidenav a.active {
    background-color: #2196F3;
    color: white;
}

/*.sidenav a:hover {
    color: black;
}*/


.sidenav a {
    padding: 2px 8px 0px 2px;
    text-decoration: none;
    font-size: 15x;
    color: #818181;
    display: block;
}





/* Add a black background color to the top navigation bar */
.topnav {
    overflow: hidden;
    background-color: #e9e9e9;

}

/* Style the links inside the navigation bar */
.topnav a {
    float: left;
    display: block;
    color: #2196F3;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 35px;
    font-weight: bold;
}

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

/* Style the "active" element to highlight the current page */
.topnav a.active {
    background-color: #2196F3;
    color: white;
}

/* Style the search box inside the navigation bar */
.topnav input[type=text] {
    float: right;
    padding: 6px;
    border: none;
    margin-top: 16px;
    margin-right: 16px;
    font-size: 17px;
}



.main {
    margin-left: 260px; /* Same as the width of the sidenav */
    font-size: 15px;
    padding: 0px 10px;
}

.main lu {
    list-style-type:none;
}

.main li {
    padding-left:15px;
}

.row{
    display:flex;
}

.column {
    flex: 50%;
}

@media screen and (max-height: 450px) {
    .sidenav {padding-top: 15px;}
    .sidenav a {font-size: 18px;}
}