WordPress Login / Password Reset Form

I’m using a custom login form on my WordPress site that I create in Elementor. However, there is no element to customize the Forget Password / Password Reset form, so I got a plugin called Erident specifically to customize the default WP Password Reset form when you click “Forgot Password.” I currently have our logo and the field labeled User Name / Email Address and a button that says “Get New Password.” My problem is the instructions between the logo and the email field. I’m fine with the instructions. However, there is a blue bar on the left of the message, and a shadow line on the bottom of the message, which is a box, but because I have all backgrounds set to white, you can only see the blue bar and the bottom shadow. I would simply like to remove the blue bar and the bottom shadow, and center the text.

I have not tested yet, but if a user types an invalid email address and gets an error message with a red bar on the left and a shadow on the bottom, I would like to remove those from the error message as well.

I’m technical enough to know where the theme editor is, I can paste php code, I can even modify php code to do what I need, sometimes. And I’m familiar with CSS syntax and html.

Thank you for your help!