[Plugin: Contact Form 7] Simple Styling

Hello,

How can i make it so that when a user clicks send and there are validation errors, the border on the input and textarea fields turn red.

I can somewhat get the effect by modifying the style.css, but adjusting the left and top properties sometimes don’t line up as I would like.

Is there an easier way to achieve this? i.e input.error {border:1px solid red} and then that gets called in the JS