First of all, congrats on your theme Activello, nice one. And thanks for sharing.
I have a problem with my website because when I check it in my mobile (or in Activello options > “mobile view”) it seems that the custom CSS is not making any change.
I hope you are well today and thank you for your question.
I checked the custom CSS code on your shared site and found you have added the CSS code in the condition like following which makes it to work only on the screen having minimum width 992px therefore it doesn’t work on mobile which has less width.
@media (min-width: 992px) {
To resolve it please correct your custom CSS code.
Sorry, I did not realize that there were those media queries in my custom CSS. I have removed the condition: “(min-width: 768px)” and now the custom CSS is working ok on mobile version too.