.slick-slide,
.slick-slide .item {
    height: 550px;
    /* match your img height */
    display: flex;
    align-items: center;
}

.slick-slide img {
    height: 100%;
    width: 100%;
    object-fit: cover;
}

.slick-arrow.disabled {
    opacity: 0.5;
    pointer-events: none;
    cursor: default;
}