This website site uses bootstrap version 3.4.1 library for HTML, CSS, and JS. This site is not intended to be used as a mobile application from a smart phone.
The recommmended browser is Google Chrome when using the website. Later versions of IE are also supported, however, compatibility view settings applied on the client's browser, have been known to cause issues. You can correct this by telling the IE browser to NOT run the website under compability mode. Othwerwise, review the bootstrap documentation using the link below as necessary if you choose to use another Browser than what is recommended. There is a detailed Browser Compatibility section in that document. Many other Browsers, other than what is outlined on this page, are also supported.