Hi,
You will need to revert all html changes to the original form, because there is a lot of conflicts in your custom html coding.
Please replace all your custom html coding with original.
When you revert everything to original then you can make changes as i said before
Best way to achieve your required styling to add class next to the original class.
Here is example:
<div class=”content-wrapper grey-background”>
Then you add css style to the class grey-background.
.grey-background {background-color: #CCC;}
With this way you will not break any responsiveness of your website but you will have all custom coloring as you wish
Danijel
