[SOLVED] Widget margins.

Hello forum.

This is my very first post. Thank you very much for wonderful theme which is atahualpa.

My question is: how can I change this widget margins? By this I mean (see attachment) color coded red and green. I cannot seem to find any way of modifying them inside 'style&configure sidebar' nor 'style widgets'.

My test site is simple 900px wide, three columns, left sidebar is 250px with 'pages' widget, as you can see it lists my works and the titles get two lines, therefore I want to get rid of those margins and let the text have more space.

Thank you in advance for advice.