/* your styles go here */
.abs-out {
    position: fixed;
    z-index: 2000;
    background: rgba(1,1,1,0.30);
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
}

.abs-center {
    position: fixed;
    z-index: 2100;
    max-width: 400px;
}

.chat-messages {
    min-height: 700px;
    height: 700px;
}