@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Vue animations */
.fade-enter-active, .fade-leave-active {
    transition: opacity .3s;
}
.fade-enter-from, .fade-leave-to {
    opacity: 0;
}
.fadeHeight-enter-active, .fadeHeight-leave-active {
    transition: opacity .5s, max-height 1s;
    max-height: 100vh;
    overflow: hidden;
}
.fadeHeight-enter-from, .fadeHeight-leave-to {
    opacity: 0;
    max-height: 400px;
}