How can I effectively remove a collection title?

Hmmm… Both the element you want to get rid of and the one you want to keep are

tags inside the same
, so that complicates it a tiny bit.

Try adding this to the bottom of your CSS file:

header.collection-header h1 {
    display: none;
}

header.collection-header div.rte h1 {
    display: block;
}

The first looks for an

child of the collection header and makes it go away. But since both headers are

tags inside the header, they both disappear. The second one makes the header you want come back. The second header is in a
, but the first one isn’t.

Let us know if this works for you.

-J.