Template-No Sidebar-doesn't work the entire width of a page

Hi Everyone! Template-No Sidebar in Adonis theme doesn't work the entire width of a page, how you showed in your demo theme. There is about 300-400px gaps on both sides (left and right) in desktop version (HD resolution) and about 50-70px in mobile version. Could you help me to do page for the entire width of a page? How I can do it?