# Pastebin LX5cQy6N div[class='card-header'] .accordion-arrow { transition: all 0.5s ease; transform: rotate(0deg); } div[class~='show'] + div[class='card-header'] .accordion-arrow { transform: rotate(90deg); } div[class~=collapsing]+div[class=card-header] .accordion-arrow{ transform: rotate(60deg); }