User:SleepyTeas/timeless.css

/* This moves the sidebar off-screen */ #mw-panel { opacity: 0; margin-left: -11em; }    /* This moves other stuff into the leftover space */ #content, #head-base, #footer, #mw-head-base { margin-left: -1px; }    /* Nicer presentation for the left-hand tabs */ #left-navigation { margin-left: 1em; }