.accordion__button:after{display:inline-block;content:"";height:7px;width:7px;border-bottom:1px solid;border-right:1px solid;transform:rotate(-45deg);transition:transform .15s linear}.accordion__button[aria-expanded=true]:after,.accordion__button[aria-selected=true]:after{transform:rotate(45deg);transition:transform .15s linear}[hidden]{display:none}.accordion__panel{animation:fadein .4s ease-in}@keyframes fadein{0%{opacity:0}to{opacity:1}}