body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background: rgb(170, 190, 250);
}

.shell {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    user-select: none;
}

.shell .item {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 250px;
    height: 250px;
    border-radius: 50%;
    overflow: hidden;
    transition: all .3s ease-in-out;
    z-index: -1;
    opacity: 0;
    background-color: #fff;
}

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

.item.active {
    opacity: 1;
    z-index: 99;
    transform: translate(-50%, -50%) scale(1.2);
    box-shadow: 0px 0px 105px -35px rgba(0, 0, 0, 0.75);
}

.item.prev {
    z-index: 2;
    opacity: 0.25;
    transform: translate(-125%, -50%);
}

.item.next {
    z-index: 2;
    opacity: 0.25;
    transform: translate(25%, -50%);
}

.shell .button-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 315px;
    z-index: 100;
}

.button-container .button {
    color: #fff;
    font-size: 32px;
    cursor: pointer;
    position: relative;
    transition: all 300ms ease-in-out;
}

.button-container .button:before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    background-color: rgba(5, 5, 5, 0.521);
    border-radius: 50%;
    z-index: -99;
}

.iconfont {
    display: block;
}

.button-container .button:nth-child(1) {
    float: left;
}

.button-container .button:nth-child(2) {
    float: right;
}