.sidebar {
    /*To close on load*/
    /*width: 0;*/
    position: relative;
    z-index: 1;
    top: 0;
    left: 0;
    overflow-x: hidden;
    transition: 0.2s;
    -webkit-box-shadow: 4px -37px 20px 0px rgba(90, 124, 145, 0.35);
    /*side bar width*/
    width: 350px;
}

    .sidebar a {
        padding: 8px 8px 8px 32px;
        text-decoration: none;
        display: block;
        transition: 0.3s;
    }

        .sidebar a:hover {
        }

    .sidebar .closebtn {
        position: relative;
        top: 0;
        right: 25px;
        margin-left: 50px;
    }

.openbtn {
    cursor: pointer;
    padding: 10px 15px;
    border: none;
}

    .openbtn:hover {
    }

#main {
    transition: margin-left .5s;
    padding: 16px;
    transition: 0.2s;
}