How to style Checkout button

If you want to change style of “Checkout” button

You can use this code to Website Tools > Custom CSS.

div.cart-checkout button.cart-checkout-button.sqs-editable-button {
    font-family: monospace !important;
    font-size: 30px !important;
    color: #f1f !important;
    background-color: #fff !important;
    border-color: green !important;
}

Result