.dropbtn {
    background:url(../img/burger.png) no-repeat;
    background-position: center center;
    color: white;
    padding: 16px;
    font-size: 16px;
    border: none;
    cursor: pointer;
    margin-right:5px;
}

.dropbtn:hover, .dropbtn:focus {
<!--    background-color: #3e8e41;-->

}

.dropdown {
    float: right;
    position: relative;
<!--    display: inline-block;-->
    display: none;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #f1f1f1;
    min-width: 400px;
    overflow: auto;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    right: 0;
    z-index: 1;
}

.dropdown-content a {
    color: black;
    padding: 22px 26px;
    text-decoration: none;
    display: block;
}

.dropdown a:hover {background-color: #ddd;}

.show {display: block;}