css cube

css-cube.markdown

css cube

A Pen by Tony Brown on CodePen.

License.

index.html

<div class="scene">
  <div class="floor"></div>
  <div class="cube">
    <div class="front"></div>
    <div class="back"></div>
    <div class="left"></div>
    <div class="right"></div>
    <div class="top">
      <div class="ballShadow"></div>
    </div>
    <div class="bottom"></div>
  </div>
  <div class="ball"></div>
</div>

style.scss

:root {
  --box-color: #0ff7;
  --rotateSpeed: 30s;
  --bounceSpeed: 1.3s;
}

body {
  background-color: #080613;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 75px;
  perspective: 10em;
}

.scene {
  position: relative;
  transform-style: preserve-3d;
  perspective-origin: 50% calc(50% - 2em);

  animation: sceneRotate var(--rotateSpeed) infinite linear;

  @keyframes sceneRotate {
    to {
      transform: rotateY(360deg);
    }
  }
}

.ball {
  width: 1em;
  height: 1em;
  border-radius: 50%;
  background-color: lightblue;
  position: absolute;
  left: -0.5em;
  bottom: 1em;
  background-image: radial-gradient(circle at top, lightblue, #000);

  animation: ballBounce var(--bounceSpeed) infinite ease-out,
    sceneRotate var(--rotateSpeed) infinite linear reverse;

  @keyframes ballBounce {
    0%,
    100% {
      bottom: 1em;
    }
    50% {
      bottom: 3em;
      animation-timing-function: ease-in;
    }
  }

  @keyframes sceneRotate {
    to {
      transform: rotateY(360deg);
    }
  }
}

.ballShadow {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(#0007, #0000 50%);
}

.cube {
  width: 2em;
  height: 2em;
  transform-style: preserve-3d;
  position: absolute;
  top: -1em;
  left: -1em;
  perspective: 100em;
  perspective-origin: 50% calc(50% - 2em);

  .left,
  .right,
  .front,
  .back {
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--box-color);
    box-shadow: 0 0 0.5em #022d2d inset;
  }

  .front {
    transform: translateZ(1em);
  }

  .right {
    transform: rotateY(90deg) translateZ(1em);
  }

  .back {
    transform: rotateY(180deg) translateZ(1em);
  }

  .left {
    transform: rotateY(270deg) translateZ(1em);
  }

  .top {
    position: absolute;
    width: 2em;
    height: 2em;
    background: var(--box-color);
    transform: translateY(-50%) rotateX(90deg);
    box-shadow: 0 0 0.5em #022d2d inset;
  }
  .bottom {
    position: absolute;
    width: 2em;
    height: 2em;
    background: #0007;
    bottom: 0;
    transform: translateY(50%) rotateX(90deg);
    box-shadow: 0 0 1em rgb(0, 0, 0);
  }
}

.floor {
  position: absolute;
  top: 1em;
  transform: translate(-50%, -50%) rotateX(90deg);
  width: 25em;
  height: 25em;
  background-image: radial-gradient(#0000, #000 75%),
    repeating-conic-gradient(
      from 45deg,
      hsl(272, 87%, 3%) 0deg 90deg,
      hsl(273, 6%, 39%) 90deg 180deg
    );
  background-size: 100%, 1em 1em;
}