input, .card-nest, .card, div.inner.shadow-md, textarea, .card-nest.w-full.shadow, .profile_social, .status_note {
border-width: 2px;
border-style: double;
border-color: black;
border-radius: 0px;
}
The text in italics are the selectors for different elements on Neospring. You can change these, here's a list of all of them.