Reduce Header and Feature Padding

I need CSS to reduce the padding on the home page between the header and the top of the page. Also I'd like to reduce the padding between the shadow of the slider and the 3 feature content boxes.

I've already reduced the slider shadow in style.css, but I am still trying to make the home page a little more compact with less white space.
Any thought would be appreciated. Thanks!

 

Paste this code in Custom CSS
Appearance > Theme Option > Styling Option > Custom CSS

Code:

.header_wrapper {
margin-top: 30px;
}
.slider_shadow{
height:50px;
}