.slider {
    width: 100%;
    position: relative;
    margin: auto;
    height: 400px;
}

    .slider .item img {
        object-fit: cover;
        width: 100%;
        height: 400px;
        border-radius: 7.5%;
    }

    .slider .previous, .slider .next {
        cursor: pointer;
        position: absolute;
        top: 50%;
        width: auto;
        margin-top: -22px;
        padding: 16px;
        color: white;
        font-weight: bold;
        font-size: 20px;
        transition: 0.6s ease;
        border-radius: 0 3px 3px 0;
    }

    .slider .next {
        right: 0;
        border-radius: 3px 0 0 3px;
    }

        .slider .previous:hover,
        .slider .next:hover {
            background-color: rgba(0, 0, 0, 0.4);
        }

    .slider .item {
        animation-name: fade;
        animation-duration: 1.5s;
    }

@keyframes fade {
    from {
        opacity: 0.4
    }

    to {
        opacity: 1
    }
}