Is there any other general style AnkiMobile applies in addition to the reviewer CSS?
AnkiMobile tends to center text on the card, but I didn’t find any relevant style in the provided code above. For example, here:
The elements on the screenshots are all basic <h3>-<h5> and <label> elements inside a couple of layers of nested divs. The card styles are intended to align all content to the left, and this is how it looks on every other platform (desktop, AnkiDroid, AnkiWeb in every web browser, including Safari on iOS):
So it seems there is something unique to AnkiMobile that overwrites the intended behavior.