[Amlan]

Thanks for your help.

I figured out how to enlarge the logo. I had to edit the css
.logo{float:left; text-align:left; width:25%; padding:15px 0;}

I changed the width to 25% from 20%.

I also changed the corresponding width of
.header_right{ float:right; text-align:right; width:75%;}

Reduced width to 75% from 80%