MediaWiki:Vector.css

/* CSS placed here will affect users of the Vector skin */

/** Hide sidebar **/
div#mw-panel {
  display: none;
}
#left-navigation {
  left: 1em;
}
#mw-head-base,
div#content,
div#footer {
  margin-left: 1em;
}

#ca-nstab-main { display:none!important; } 
#ca-talk { display:none!important; }