.float {
    animation: float 4s infinite ease-in-out alternate;
}

@keyframes zoom {
    from,
    to {
        background-color: rgba(170, 178, 189, 0.3);
        transform: scale(.6) rotate(0.01deg);
    }
    50% {
        background-color: rgba(170, 178, 189, 0.6);
        transform: scale(.8) rotate(0.01deg);
    }
}

.shadow:after {
    position: relative;
    display: block;
    width: 1em;
    height: .5em;
    border-radius: 100%;
    content: "";
    animation: zoom 4s ease-in-out infinite alternate;
    background-color: #fff;
}

@keyframes rotateShake {
    from {
        transform: rotate(-10deg);
    }
    to {
        transform: rotate(10deg);
    }
}

@keyframes float {
    from,
    to {
        transform: transofrmY(0);
    }
    50% {
        transform: translateY(4px);
    }
}