body{
    margin: 0; padding: 0;
}

.overlay{
    height: 100%;
    width: 100%;
    background-color: #000;
    position: absolute;
    z-index: 3;
    overflow-x: hidden;
}
.overlay-content {
    top: 5%;
    width: 100%;
    font-family: Arial;
    letter-spacing: 3px;
    color: #fff;
    text-align: center;
    left: 0;
    position: absolute;
    z-index: 3;
}

.overlay a{
    width: 100%;
    font-size: 30px;
    transition: 10.0s;
    color: #fff;
    text-decoration: none;
    display: block;
    padding: 20px;
    z-index: 3;
}


.closebtn{
    position: absolute;
    z-index: 3;
    margin-left: 93%;
    font-size: 40px;
}