.main-slider {
    width: 100%;
    height: 480px;
    position: relative;
}

.main-slider:before,
.main-slider .slider-item {
    position: absolute;
    left: 0;
    right: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    justify-content: center;
    align-items: center;
    opacity: 0;
    display: flex;
    z-index: 1;
    transition: opacity 0.5s ease-in-out;
}
.main-slider:before{
    opacity: 1;
    background: #00000030;
    user-select: none;
    pointer-events: none;
    z-index: 2;
    content: ' ';
}
.main-slider .slider-item img{
    width: 100%;
    height: auto;
    min-height: 100%;
}
.main-slider .slider-item.active{
    opacity: 1;
    transition: opacity 0.5s ease-in-out;
}