span.ball {
    width: 28px;
    height: 28px;
    margin-left: 2px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.printing .start_button {
    display: inline-block;
}

.printing .stop_button {
    display: none;
}

.printing.started .stop_button {
    display: inline-block;
}

.printing.started .start_button {
    display: none;
}


.autopay .start_button {
    display: inline-block;
}

.autopay .stop_button {
    display: none;
}

.autopay .resume_button {
    display: none;
}


.autopay.started .stop_button {
    display: inline-block;
}

.autopay.started .start_button {
    display: none;
}

.autopay.started.paused .resume_button {
    display: inline-block;
}

.autopay.started.paused .stop_button {
    display: none;
}