.block-ui-container {
    border: 5px solid #2f2f2f !important;
    padding: 10px;
    font-family: arial, tahoma, verdana;
    font-size: 15px;
}

.block-ui-message {
    line-height: 23px;
}

.block-ui-button {
    border: 0;
    background-color: #2f2f2f;
    padding: 7px;
    color: #ffffff;
    font-weight: bold;
    font-size: 15px;
    cursor: pointer;
}