It’s actually just the width of the div that contains the slider –
.slider-inner,
#welcome .wrap,
#home-feature-bg .wrap,
#home-feature-bg-alt .wrap,
#home-feature-bg-dark .wrap {
margin: 0 auto;
padding: 40px 0 0;
width: 92%;
}
Which shows up on line 7719 in your css. For some reason you have a lot of spacing/breaks in your css which is causing your css to be bigger than it should be. Not sure how to fix that other than doing it all manually….or running your code inside a place like this – http://cleancss.com/ ….backup your work just in case it doesnt work properly.
I would take this – .slider-inner
and move it to it’s own line like this –
.slider-inner {
width: 100%;
}