html {
   box-sizing: border-box;
   background: black;
}

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

body {
   min-height: 100vh;
   display: flex;
   justify-content: center;
   align-items: center;
   font-family: sans-serif;
   font-size: 20px;
   margin: 0;
}

.items {
   height: 600px;
   padding: 100px;
   width: 100%;
   border: 1px solid white;
   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: 800px;
}

.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: 120px;
   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); }