@include u-keyframes(turnInDown) {
    0% {
        opacity: 0;
        @include u-transform(perspective(500px) rotateX($saf-turn-angle * -1) translateZ(150px));
    }
    100% {
        opacity: 1;
        @include u-transform(perspective(800px) rotateX(0deg) translateZ(0));
        @include u-prefix(backface-visibility, hidden, webkit moz spec);
    }
}

@mixin turnInDown($duration: 1s, $delay: 0s, $fill-mode: forwards) {
    @include u-animation(turnInDown $duration $delay $fill-mode);
}

@include u-keyframes(turnInUp) {
    0% {
        opacity: 0;
        @include u-transform(perspective(500px) rotateX($saf-turn-angle) translateZ(150px));
    }
    100% {
        opacity: 1;
        @include u-transform(perspective(800px) rotateX(0deg) translateZ(0));
        @include u-prefix(backface-visibility, hidden, webkit moz spec);
    }
}

@mixin turnInUp($duration: 1s, $delay: 0s, $fill-mode: forwards) {
    @include u-animation(turnInUp $duration $delay $fill-mode);
}