@keyframes GoIn {
    0% {
        transform: translateX(var(--x));
        opacity: 0;
    }
    100% {
        opacity: var(--opacity, 1);
    }
}

@keyframes GoOut {
    0% {
        opacity: 1;
    }
    100% {
        transform: translateX(var(--x));
        opacity: 0;
    }
}