.fade-in{

    animation:fadeIn 1s ease;

}

@keyframes fadeIn{

    from{

        opacity:0;
        transform:translateY(20px);

    }

    to{

        opacity:1;
        transform:translateY(0);

    }

}

@keyframes aurora{

    0%{

        transform:
            translateX(-20%)
            rotate(0deg);

    }

    100%{

        transform:
            translateX(20%)
            rotate(5deg);

    }

}

header *{

    position:relative;

    z-index:2;
}