div.pbdialogcontainer {
    border: 1px solid #ccc;
    box-shadow: 0 0 80px -20px #000;
    background-color: #fff;
}

div.pbdialogcontainer .top {
    position: relative;
    height: 40px;
    background-color: #e6e6e6;
}

div.pbdialogcontainer .buttons .close {
    position: absolute;
    top: 0;
    right: 0;
    display: block;
    height: 40px;
    width: 40px;
    border: 5px solid #e6e6e6;
    text-align: center;
    line-height: 1.5em;
    color: #000;
    background-color: #ccc;
}

div.pbdialogcontainer .buttons .close:after {
    content: 'x';
    position: absolute;
    top: 2px;
    left: 10px;
}

div.pbdialogcontainer .close:hover {
    color: #fff;
    background-color: #000;
}