#broadcast-message {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    overflow: auto;
    z-index: 100;
}

#broadcast-message-inner {
    position: absolute;
    top: 50px;
    left: 0;
    right: 0;
    margin-left: auto;
    margin-right: auto;
    padding: 10px;
    max-width: 650px;
    background: #fff;
}