While building a flip card animation, you notice the back of the card is visible during the rotation. Which CSS property can help hide the back of the card until it's facing the viewer?

To hide the back of a card during a flip card animation, you can use the backface-visibility property with the value hidden. This property ensures that the back face of the card is not visible until it's facing the viewer, which is essential for creating realistic flip animations. Options like visibility: hidden;, display: none;, or opacity: 0; would make the entire element disappear, which is not the desired effect for a flip card animation.