.transition-fade{
    opacity: 1;
    transition: 500ms;
    transform: translateX(0);
    transform-origin: left;
}
html.is-animating .transition-fade{
    opacity: 1;
    transform: translateX(90%);
}
html.is-leaving .transition-fade{
    opacity: 0;
    transform: translateX(0);
}