tablet portrait view: restore 100% width after removing sidebar?

Replies: 0

I’ve used the following CSS in the Minamaze Pro theme to hide right-hand sidebars when in tablet portrait view:

@media only screen and (max-width: 990px) {
  #sidebar {
    display: none !important;}

But I’m unable to reclaim the white space where the menu used to be and stretch the content over to the right hand margin for a 100% width view.

I’ve tried additions like this but they don’t work:

@media only screen and (max-width: 990px) {
  #sidebar {
    display: none !important;}

.content { width: 100% !important; border: none !important; }}

Any suggestions?