.announcements-container > .panel:not(.panel-active) {
    display:none;
     -webkit-transition: height .3s linear, padding-top .3s linear, padding-bottom .3s linear, border-top-width .3s linear, border-top-width .3s linear;
    transition: height .3s linear, padding-top .3s linear, padding-bottom .3s linear, border-top-width .3s linear, border-top-width .3s linear;
}

#mdlAnnouncements .modal-content {
    max-width: 400px;
}
.announcements-container > .panel {
    -webkit-box-shadow: 0;
    box-shadow: none;
}