html {
  box-sizing: border-box;
  background: url("../assets/background.jpg");
  background-size: cover;
}

*,
*:before,
*:after {
  box-sizing: inherit;
}

.main-body {
  min-height: 90vh;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: sans-serif;
  font-size: 20px;
  margin: 0;
}

.items {
  height: 800px;
  padding: 100px;
  width: 100%;
  border: 1px solid white;
  border-radius: 10px;
  overflow-x: scroll;
  overflow-y: hidden;
  white-space: nowrap;
  user-select: none;
  cursor: pointer;
  transition: all 0.2s;
  transform: scale(0.98);
  will-change: transform;
  position: relative;
  background: rgba(255, 255, 255, 0.1);
  font-size: 0;
  perspective: 500px;
}

.items.active {
  background: rgba(255, 255, 255, 0.3);
  cursor: grabbing;
  cursor: -webkit-grabbing;
  transform: scale(1);
}

.item {
  width: 200px;
  height: calc(100% - 40px);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
  font-weight: 100;
  color: rgba(0, 0, 0, 0.15);
  box-shadow: inset 0 0 0 10px rgba(0, 0, 0, 0.15);
}

.item:nth-child(9n + 1) {
  background: dodgerblue;
}
.item:nth-child(9n + 2) {
  background: goldenrod;
}
.item:nth-child(9n + 3) {
  background: paleturquoise;
}
.item:nth-child(9n + 4) {
  background: gold;
}
.item:nth-child(9n + 5) {
  background: cadetblue;
}
.item:nth-child(9n + 6) {
  background: tomato;
}
.item:nth-child(9n + 7) {
  background: lightcoral;
}
.item:nth-child(9n + 8) {
  background: darkslateblue;
}
.item:nth-child(9n + 9) {
  background: rebeccapurple;
}

.item:nth-child(even) {
  transform: scaleX(1.31) rotateY(40deg);
}
.item:nth-child(odd) {
  transform: scaleX(1.31) rotateY(-40deg);
}

.footer {
  height: 7vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  letter-spacing: 0.1rem;
  color: #ff0000;
  text-shadow: 1px 0 0 #ff0000;
}
.footer > a {
  text-shadow: 1px 0 0 #000;
  color: #000;
  margin: 0 1rem;
}