@keyframes hinge {
0% {
animation-timing-function: ease-in-out;
}
20%,
60% {
transform: rotate3d(0, 0, 1, 80deg);
40%,
80% {
transform: rotate3d(0, 0, 1, 60deg);
opacity: 1;
to {
transform: translate3d(0, 700px, 0);
opacity: 0;
.hinge {
animation-duration: calc(var(--animate-duration) * 2);
animation-name: hinge;
transform-origin: top left;