.reveal {
    position: relative;
    opacity: 0;
 }

 .reveal.active {
    opacity: 1;
 }

 .active.fade-bottom {
    animation: fade-bottom 1s ease-in;
 }

 .active.fade-top {
    animation: fade-top 1s ease-in;
 }

 .active.fade-left {
    animation: fade-left 1s ease-in;
 }

 .active.fade-right {
    animation: fade-right 1s ease-in;
 }

 @keyframes fade-bottom {
    0% {
       transform: translateY(50px);
       opacity: 0;
    }

    100% {
       transform: translateY(0);
       opacity: 1;
    }
 }

 @keyframes fade-top {
    0% {
       transform: translateY(-50px);
       opacity: 0;
    }

    100% {
       transform: translateY(0);
       opacity: 1;
    }
 }

 @keyframes fade-left {
    0% {
       transform: translateX(-100px);
       opacity: 0;
    }

    100% {
       transform: translateX(0);
       opacity: 1;
    }
 }

 @keyframes fade-right {
    0% {
       transform: translateX(100px);
       opacity: 0;
    }

    100% {
       transform: translateX(0);
       opacity: 1;
    }
 }