How to reduce space between header and content

Hi guys.

I am trying to shrink the space between the header and the content on my site …. http://shootingtime.com/new .

I do have a child theme and have added this code which did shrink the space a little.

.site-content article {
padding-top: 0;
}

I am assuming that the file I need to change may be in the expound.css file. Now if my style.css of my child theme has this in it:

/* =Imports styles from the parent theme
————————————————————– */
@import url(‘../expound/style.css’);

will it allow me to modify expound.css? Really need some help here.

Thanks!