body {
    margin: 0 auto;
    padding: 0;
    background: #333;
}

.carousel {
    max-width: 600px;
    margin: auto;
    position: relative;
}

.carousel .carousel-item,
.carousel .carousel-item-hidden{
    display: none;
}

.carousel .carousel-item-visible {
    display: block;
    animation: fadeVisibility 0.7s;
}

.carousel .carousel-item img {
    width: 100%;
    max-width: 600px;
    height: auto;
}

.carousel .carousel-actions {
    display: flex;
    width: 100%;
    justify-content: space-between;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}

.carousel .carousel-actions button {
    margin: 0 20px;
    padding: 10px 20px;
    background: whitesmoke;
    color: #333;
    opacity: .7;
    font-weight: bolder;
    font-size: 30px;
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

@keyframes fadeVisibility {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}