.kuroneko_sms_fields{
    text-align: center;
    margin-top: 1em;
}
.kuroneko_sms_fields p{
    margin-bottom: 1em;
}
.kuroneko_sms_fields label input{
    width: 2em;
    font-size: 2em;
    text-align: center;
    border-radius: .25em;
}