Thank you, Mike,

Success. Great!

I only had to add “position” as in my first attempts and now it looks great (and transparent) on mobile.

.html_mobile_menu_tablet #top #wrap_all .av_header_transparency {
    background-color: transparent !important; 
    position: absolute!important;
}

Now, I also found a solution for the 2nd problem in this forum: How to make the sticky header also transparent after scrolling down (when it becomes opaque and white).

/* Set background of sticky header */
.header_color .header_bg {
    background: transparent;
}

Many thanks for your great support again and regards,
Hart

• This reply was modified 4 years, 6 months ago by hartg. Reason: Solution found now