I think the main issue is the fact that your sidebar floats to the left…..which is why it shows up so close to the content. It’s supposed to float to the right. I’m guessing you changed this since the Epik theme has it to the right by default. So if you look around line 618, just change it to float: right like this –
.content-sidebar-sidebar #sidebar-alt,
.footer-widgets-3,
.sidebar,
.sidebar-content #content,
.sidebar-content-sidebar #content-sidebar-wrap,
.sidebar-sidebar-content #content,
.sidebar-sidebar-content #content-sidebar-wrap,
#footer .creds,
#header .widget-area {
float: right;
}
To change the width you have to use the code I gave above. That is the sidebar, so it will change, just make sure you’re editing the right part.