Readability
SC 1.4.12 - What does "Text Spacing" mean?
You built the hero exactly as designed. Height 400 pixels, text centred, pixel perfect. Then a reader with dyslexia turns line height up to 1.5, and the last line of your heading is simply gone.
SC 1.4.4 - What does "Resize Text" mean?
Somebody finds your text too small and presses Ctrl and plus. The letters get bigger, and then it goes wrong: the last line of every card is gone, button labels sit on top of each other, and the menu will not open.