body {
  background: #F0F3FB;
  margin-left: 0;
  margin-right: 0;
}

.items {
  position: relative;
  overflow: scroll;
  width: 100%;
  white-space: nowrap;
  overscroll-behavior: none;
  user-select: none;
  height: 400px;
  border: 1px solid black;
}
.container {
  display: block;
  position: relative;
  width: 100%;

}

.item {
  overflow: hidden;
  margin: 18px 12px 30px 0;
  width: 271px;
  height: 244px;
  line-height: 244px;
  text-align: center;
  font-weight: bold;
  font-size: 40px;
  border-radius: 3px;
  background-color: #fff;
  -webkit-box-shadow: 0 2px 2px 0 rgb(0 0 0 / 4%), 0 0 2px 0 rgb(0 0 0 / 15%);
  box-shadow: 0 2px 2px 0 rgb(0 0 0 / 4%), 0 0 2px 0 rgb(0 0 0 / 15%);
}

#prev,
#next {
  position: absolute;
  top: 0;
  z-index: 10;
}

#prev {
  left: 100px;
}

#next {
  right: 100px;
}