stylish_developer.wordpress.org.css

.devhub-wrap #content-area.has-sidebar {
    width: auto;
}

.devhub-wrap #content-area, .devhub-wrap .inner-wrap {
    max-width: none;
}
    
.devhub-wrap .has-sidebar main {
	width: 79%;   
}

.devhub-wrap .has-sidebar .widget-area {
    width: 20%;
}