<div class="wall">
  <h1>iPhone Price Comparison</h1>
  <div class="back">
    <ul>
      <li class="xs-max"><span>$1099 ~ $1449</span></li>
      <li class="xs"><span>$999 ~ $1349</span></li>
      <li class="xr"><span>$749 ~ $899</span></li>
      <li class="x"><span>$999 ~ $1149</span></li>
    </ul>
  </div>
  <div class="side">
    <ul>
      <li class="xs-max">iPhone XS Max</li>
      <li class="xs">iPhone XS</li>
      <li class="xr">iPhone XR</li>
      <li class="x">iPhone X</li>
    </ul>
  </div>
</div>
body {
    margin: 0;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(lightblue, skyblue);
}

.wall {
    width: 60em;
    height: 40em;
    font-size: 10px;
    border: 1em solid rgba(255, 255, 255, 0.5);
    border-radius: 2em;
    display: grid;
    grid-template-columns: 0 4fr 1fr;
    overflow: hidden;
}

h1 {
    position: relative;
    width: 20em;
    margin: 1em;
    color: white;
    font-family: sans-serif;
}

.back,
.side {
    display: flex;
    align-items: center;
}

.back {
    background: linear-gradient(to right, #555, #ddd);
    justify-content: flex-end;
}

.side {
    background: 
        radial-gradient(
            at 0% 50%,
            rgba(0, 0, 0, 0.2) 25%,
            rgba(0, 0, 0, 0) 90%
        ),
        linear-gradient(to right, #ddd, #ccc);
    perspective: 1000px;
}

ul {
    list-style-type: none;
    padding: 0;
    --max-price: 1449;
    display: flex;
    flex-direction: column;
}

.back ul {
    width: 75%;
    align-items: flex-end;
}

.side ul {
    width: 100%;
    transform-origin: left;
    transform: rotateY(-75deg) scaleX(4);
}

ul li {
    height: 5em;
    background: var(--c);
    animation: show 1s linear forwards;
    transform-origin: right;
    transform: scaleX(0);
}

@keyframes show {
    to {
        transform: scaleX(1);
    }
}

ul li.xs-max {
    --c: tomato;
    --high-price: 1449;
    --low-price: 1099;
    --c2: orangered;
    z-index: 5;
}

ul li.xs {
    --c: coral;
    --high-price: 1349;
    --low-price: 999;
    --c2: tomato;
    z-index: 4;
}

ul li.xr {
    --c: lightsalmon;
    --high-price: 899;
    --low-price: 749;
    --c2: coral;
    z-index: 3;
}

ul li.x {
    --c: deepskyblue;
    --high-price: 1149;
    --low-price: 999;
    --c2: dodgerblue;
    z-index: 2;
}

.back ul li {
    width: calc(var(--high-price) / var(--max-price) * 100%);
    --percent: calc(var(--low-price) / var(--high-price) * 100%);
    background: linear-gradient(
        to left,
        var(--c) var(--percent),
        var(--c2) var(--percent)
    );
    position: relative;
    filter: drop-shadow(0 1em 1em rgba(0, 0, 0, 0.3));
    animation-delay: 1s;
}

.back ul li::before {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    transform: translateX(-3em);
    border-right: 3em solid var(--c2);
    border-top: 2.5em solid transparent;
    border-bottom: 2.5em solid transparent;
}

.back ul li span {
    position: absolute;
    width: 95%;
    text-align: right;
    font-size: 1.25em;
    line-height: 4em;
    color: white;
    font-family: sans-serif;
}

.side ul li {
    padding-right: 30%;
    text-align: right;
    color: white;
    font-family: sans-serif;
    line-height: 5em;
}

External CSS

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External JavaScript

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