I’m trying to create a child theme of Clean Retina, but even with an empty child theme, the resulting theme is not identical to Clean Retina. The problem is in the menu bar. Let’s say I have this menu bar when Clean Retina is enabled:

Then, after activating the child theme, it looks like this:

The ‘Home’ link disappears and nested menu items are shown as regular items.
This is the content of the child’s style.css:
/*
Theme Name: Clean Retina Child
Template: clean-retina
*/
@import url("../clean-retina/style.css");
Am I missing something here? Thanks in advance.