.arx-popup-specialchars {
    max-width: 374px;
    padding: 0;
}
.arx-popup-body-specialchars {
    display: flex;
    flex-wrap: wrap;
}
.arx-popup-body-specialchars .arx-button-popup {
    margin-bottom: -1px;
    width: 32px;
    height: 32px;
    line-height: 32px;
    padding: 0;
    color: #111;
    text-align: center;
    border: 1px solid #eee;
    border-left-color: transparent;
}
.arx-popup-body-specialchars .arx-button-popup:hover {
    color: #111;
    background-color: #e4e4e4;
}