*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.spinner-wrapper {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    text-align: center;
    background-color: rgba(0, 0, 0, 0.5);
}

.spinner-content-wrapper {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.spinner-img {
    /*animation: flip 3s linear infinite;*/
    animation: smoothUpDown 1s ease-in-out infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@keyframes flip {
    0% {
        transform: perspective(400px) rotateY(0deg);
    }

    50% {
        transform: perspective(400px) rotateY(180deg);
    }

    100% {
        transform: perspective(400px) rotateY(360deg);
    }
}

@keyframes smoothUpDown {
    0% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }

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