This is the first item's accordion body. It is shown by
default, until the collapse plugin adds the appropriate classes that we
use to style each element. These classes control the overall appearance,
as well as the showing and hiding via CSS transitions. You can modify
any of this with custom CSS or overriding our default variables. It's
also worth noting that just about any HTML can go within the
.accordion-body
, though the transition does limit overflow.