CSS help please

Hi,

I need to change some elements of the CSS please.

I am using the rounded edge template at the moment.

I would like to do the following.

– Change the font across the form, on the fields, buttons, messages and placeholder text. (Currently cant edit this).
– Remove the out border frame around the form and let fields go flush to edge.
– Change the colour of the text.
– Change the colour of the button.
– Apply 5px radius to fields and the button.

Thanks in advance.