.pie{border-radius:50%;height:18px;overflow:hidden;position:relative;width:18px}.pie button,.pie button:focus{bottom:50%;cursor:pointer;height:100%;left:50%;outline:none;position:absolute;transform-origin:bottom left;transition:all .2s ease-out;width:100%}@keyframes y_bounce{0%,to{animation-timing-function:cubic-bezier(.8,0,1,1);transform:translateY(-10%)}50%{animation-timing-function:cubic-bezier(0,0,.2,1);transform:none}}