Often times Ecommerce Templates Users will encounter conflicts between CSS stylesheet entries in:
(1) css/ectcart.css (loaded first) and
(2) css/styles.css (or whatever name, loaded second, your main stylesheet which can contain entries that override those in ectcart.css)

Modern web browsers include a powerful suite of Developer Tools that will help you identify problems, modify and correct active CSS entries.

But how do you use the web browser CSS DevTools ?

Watch this YouTube video demonstration by Kevin Powell >>

Read this article about browser developer tools >>

Gary