Changed some login page styles
Changed some login page styles

- Font size of text box was smaller than that of button, due to which
the page looked like it was placing emphasis on the button more and the
things looked awkwardly sized
- Instead of line-height, we can use vertical padding for the same
effect. The advantage it gives us is that it's much more flexible.

Open for discussion. @tmibvishal, we can discuss in the comments if you
have any problem.

devclub-iitd/sendata,devclub-iitd/sendata,devclub-iitd/sendata