Front end is one the main parts of any web application. The first ever interaction of the visitor is always with your web app's front end. So it plays a big role in converting a visitor into a customer. There are plenty of techs to build the front end of web applications but the most reliable and liked one is React js (html + css are obvious).
There are many styling frameworks are available nowadays to increase speed of development including Reactstrap, tailwindCSS + headlessUI, antd.
I would love work on your web based project in ReactJs with my 4 yr+ experience :)