No Red Highlight When Required Information Missing/Invalid

Hi!

Your theme is overriding the background color Seamless Donations uses to highlight missing fields.

Seamless Donations does this:
.dgx-donate-form-section input.dgx-donate-invalid-input {background: #faa;}

But your theme has rules for these selectors that override that
#top input[type=”text”]
#top .main_color input[type=’text’]

Probably the fastest thing to do is add this custom css to your site, effectively making the priority of the plugin style a bit higher:

#dgx-donate-form .dgx-donate-form-section input.dgx-donate-invalid-input {background: #faa;}