.blockui-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
}

.blockui-message {
    background: white;
    color: #336699;
    font-family: Verdana,Geneva,Arial,Helvetica,sans-serif;
    font-size: 17px;
    font-weight: 400;
    padding: 10px;
    margin: 10px;
    width: 30%;
    top: 40%;
    left: 35%;
    text-align: center;
    border: 3px solid #aaa;
    cursor: wait;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
}