How to remove styles from a button?

Question

css

https://jsfiddle.net/y8ewfyu4/8/
Actually the question is how to remove these styles from the button? here are all sorts of eyeliners and so on, so that it is white without an extra shadow.
button:active, button:focus {
outline: none !important;
}
doesn't help

Answer 1

.purchase__button { border: none; outline: none; }

Answer 2

https://jsfiddle.net/y8ewfyu4/15/