Checkout Input are White against White Background

https://nineteenthirtyone.com/checkout/

As you can see from the attached. When inputting card details into our checkout, the font colour is white against a white background.

We have tried

.Input--invalid {
color: rgb(0, 0, 0) !important;
}

.Input {
color: rgb(0, 0, 0) !important;
}

as well as variations on this, but everytime we do not seem to be able to overide the white colour.

This needs a permanent fix asap.