.cck-tab-selected {
    background-color: rgba(0, 0, 0, 0.4);
}

.back-icon {
    background-image: resource("d_back@2x");
}

.forward-icon {
    background-image: resource("d_forward@2x");
}

/* light mode version
.back-icon {
    background-image: resource("back@2x");
}

.forward-icon {
    background-image: resource("forward@2x");
}
*/