.keypad  button {
    margin: 1%;
    width: 31%;
    height: 23%;
    background: #fbfbfb;
    border: none;
    border-radius: 10px;
    font-size: 28pt !important;
}

.keypad  button.delete {
    background: red;
    color: white;
}

.keypad  button.submit {
    background: #74C043;
    color: white;
}