.corner-button-popup {
    position: fixed;
    bottom: 10px;
    right: 10px;
    max-width: 70px;
    transition: all .3s;
}

.corner-button-popup:hover {
    cursor:pointer;
    transform:scale(1.1);
}

div#corner-popup {
    display:none;
    position: fixed;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.75);
    height: 100%;
    left: 0;
    top: 0;
    z-index: 2000000;
    text-align: center;
    padding: 100px;
    color: white;
}

div#close-popup {
    position: absolute;
    top: 30px;
    right: 30px;
    border-radius: 30px;
    padding: 3px 15px;
    line-height: 1.4em;
}
div#close-popup:hover{
    cursor:pointer;
    opacity:.8;
}
.close-x{
    line-height: 26px
    font-size:20px;
    background-color:black;
    width:26px;
    height:26px;
    text-align: center;
    border: 1px solid white;
    margin-left:10px;
    display:inline-block;
    border-radius: 13px;
}

@media(max-width:640px){
    div#corner-popup {
        padding: 20px;
        padding-top: 100px;
        overflow-y:scroll;
    }    
}