.nv-close-icon {
    height: 34px;
    width: 34px;
    cursor: pointer;
    opacity: 0.5;
}

.nv-close-icon {
    background: url(/css/img/buttons/close.png);
}

.nv-close-icon:hover{
    opacity: 0.8;
    background-color: #3a3a3a;
}

.nv-close-icon:active{
    opacity: 1;
    background-color: #922a29;
}