:root{--td:.3s}.collapse-transition{transition:var(--td) height ease-in-out,var(--td) padding-top ease-in-out,var(--td) padding-bottom ease-in-out}.collapse-transition-enter-active,.collapse-transition-leave-active{transition:var(--td) max-height ease-in-out,var(--td) padding-top ease-in-out,var(--td) padding-bottom ease-in-out}