Extra Options for Radio Boxes?

Ive been playing with the extra styles for a radio box and cant seem to get it how i want

Problem 1

The radio button sits on the edge of the left boundary of the slot it occupies is there a way to have a gap near the edge of the area

ie move the round bit to the right to create a gap on the left so it looks better

Problem 2

Is there a way to make a darker border or a line for the edge of the area? ie this edge

Any options?