body {
  color: #333;
  text-align: center;
  background: #222;
  margin: 0;
}

ul {
  padding: 0;
}

li {
  list-style: none;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 50px 0;
}
main h1 {
  margin-bottom: 50px;
}

.wrapper {
  position: relative;
}
.wrapper:before, .wrapper:after {
  position: absolute;
  top: 0;
  z-index: 1;
  content: "";
  display: block;
  width: 20px;
  height: 100%;
}
.wrapper:before {
  left: 0;
  background: linear-gradient(90deg, #222, transparent);
}
.wrapper:after {
  right: 0;
  background: linear-gradient(-90deg, #222, transparent);
}

.items {
  position: relative;
  width: 100%;
  overflow: hidden;
  white-space: nowrap;
  font-size: 0;
  cursor: pointer;
}
.items.active {
  cursor: grab;
}

.item {
  display: inline-block;
  margin-left: 20px;
  user-select: none;
  background: tomato;
  width: 50%;
  height: 130px;
  color: #222;
  font-size: 33px;
  font-weight: bold;
  line-height: 130px;
}
.item:last-child {
  margin-right: 20px;
}

@media screen and (min-width: 500px) {
  .item {
    width: 33%;
  }
}
@media screen and (min-width: 800px) {
  .item {
    width: 25%;
  }
}
@media screen and (min-width: 1200px) {
  .wrapper {
    margin-left: -20px;
  }

  .item {
    width: 20%;
  }
}