The back should correct, not overwhelm.
Lead with the answer
Use the strongest visual position for the concise answer. Do not begin by repeating the front or adding labels that the learner already saw. The first glance should resolve the retrieval attempt.
Typography and spacing should establish a clear order: answer, short explanation, then optional detail. If everything has equal emphasis, the learner has to search the card after already doing the work of recall.
Reveal dimensions in tabs
Different card types need different supporting dimensions. A word may need meaning, example, and distinction. A formula may need name, structure, and use. A cultural saying may need answer, story, and source.
Horizontal tabs keep those dimensions available without stacking them into a long sheet. The current tab belongs at the lower left; secondary actions stay separate on the lower right so navigation and editing do not compete.
Remove information that does not help
More context is not automatically more useful. Repeated prompt text, generic definitions, and unrelated facts increase reading time without improving the judgment of recall.
Test the back after answering aloud. If a block does not help you confirm, correct, or deepen that answer, move it to another card or remove it from the review surface.