Highlight required fields and pre-check terms and conditions

Two part questions:

1. is it possible to replace the missing required fields notice at the top of the checkout page with a highlight of the missing fields? I found one post comment with this code:
.woocommerce-invalid-required-field input {
outline: 1px solid red!important;
}

But it doesn’t work. This is the link of the site just in case: bellussi.com/shop/checkout

2. Is it possible to pre-check the terms and conditions forms at the bottom of the same checkout page?

Thanks!