@keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes fadeout {
    from { opacity: 1;  }
    to   { opacity: 0;  }
}

@keyframes constant-white {
    from { opacity: 0; }
    to   { opacity: 0; }
}

.body-content.fadein{
    animation: fadein 0.7s;
    animation-timing-function: linear;
}

.body-content.fadeout{
    animation: constant-white 0.8s, fadeout 0.6s;
    animation-timing-function: linear;
}