hahaha
After bumping for few hours…. it came in 2 minutes…
1)create a specific page template for the pages to be with no sidebar. (copy of page.php)
2) replace the get_header() function with the header.php content
3) somewhere in the header, before the wp_head () put the !important style you want to have for this page.
Example: <style> body:before {width:0px!important;} .site-content {margin-left:0px!important; width:100%!important;} </style>
Full width, no sidebar in no time ??
