Add New Post Page Not Responsive

[ayushsingh199]

Add new post page is not responsive also there is a text in black colour which is not readable , we should change that to provide a clean user experience.

[ayushsingh199]

I am willing to work on this, please assign it to me.

[Riddhi050803]

@ayushsingh199 I'm assigning it to it. Try to improve its overall UI also.