Style Choose File button?

Hi

First of all this is really awesome plugin everything is working fine. But i can’t be able to change the text “Choose File” to “Browse”. i also wants to align this button to the right side and how can i change its background color and padding etc. Here is the link of my site
http://jwebsol.com/dev/Tin-Pan/

Any Help .?

https://wordpress.org/plugins/contact-form-7/