.overlay
{
    width: 800px;
    padding: 8px;
    position: absolute;
    z-index: 1;
    top: 10%;
    left: 10%;
	background-color: white;
    overflow-x: hidden;
    transition: 0.5s;
	display: block;
}

.overlay-content
{
    position: relative;
    width: 100%;
    text-align: center;
    margin-top: 30px;
}

.overlay .knopf
{
    padding: 8px;
    text-decoration: none;
    font-size: 36px;
    color: #818181;
    display: block;
    transition: 0.3s;
}

.overlay a:hover, .overlay a:focus
{
    color: #f1f1f1;
}

.overlay .closebtn
{
    position: absolute;
    top: -30px;
    right: 0px;
    font-size: 60px;
}