Optimize the UI to make it Mobile Friendly

[Saswatsusmoy]

All changes/improvements regarding the UI to make it more user friendly. Let's make it this issue active and contributors can link their PRs such as

To # (issue)

This shall enable contributions without closing the issue while also getting continous updates

To-Do -

• Change the underheader styles for mobile view
• Optimize the footer to make it mobile friendly
• Add "Read more.." to the long texts in the underheader
• Change the input box and send designs

[arjxn-py]

Thanks for opening this @Saswatsusmoy, it'd be more helpful if you could also specify the areas to improve in points so that we can target this issue step-by-step iteratively.