I can successfully modify the theme (7.6) with a custom.less file in /custom/themes/custom.less.
background-color: orange !important;
But I can't change style for a BWC module ? They are loaded in a iframe with a RacerX theme. Do I have to create a custom.css file in custom/themes/default/css like a 6.5 CE ? Or custom/themes/RacerX/css ?
How to change style of a #bwc module ?