Code Playground

@charset "UTF-8";
@import url(https://fonts.googleapis.com/css?family=Nunito+Sans:300,400,600,700,800);
*,
:after,
:before {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
@property --blur {
  syntax: "<length>";
  initial-value: 0;
  inherits: true;
}

@property --brightness {
  syntax: "<number>";
  initial-value: 0;
  inherits: true;
}

@property --rotationY {
  syntax: "<angle>";
  initial-value: 0deg;
  inherits: true;
}

:root {
  --shape: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

body {
  width: 100vw;
  height: 100vh;
  display: grid;
  place-items: center;
  background: url("https://assets.codepen.io/907471/DALL%C2%B7E+2024-11-07+22.19.21+-+A+very+dark%2C+hyper-futuristic+abstract+image+with+a+central+vanishing+point+and+a+high-tech+aesthetic.+The+color+palette+is+dominated+by+deep+blacks%2C+.webp")
  no-repeat center center,
  var(--color-surface);
  background-size: cover;
  color: var(--color-primary);
  font-family: "Helvetica Neue", monospace;
  font-weight: bold;
  font-size: 20vmin;
  margin: 0;
  perspective: 32rem;
  position: relative;
  overflow: hidden;
  &:after {
    content:'';
    backdrop-filter: blur(1.5rem);
    mask: radial-gradient(circle, transparent 50%, rgba(0,0,0,1) 75%);
    z-index:1;
    pointer-events:none;
    position: absolute;
    inset: 0;
    width: 100dvw;
    height: 100dvh;
  }
}

.container {
  position: relative;
  display: grid;
  place-items: center;
  transform-style: preserve-3d;
  animation: rotate 6s linear infinite;
  transform: rotate3d(0, 1, 0, var(--rotationY));
  will-change: transform;
  --distance: 3vmin;
}

.left,
.right {
  position: absolute;
  width: calc(var(--distance) * 4);
  height: 28vmin;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(0.3rem);
}

.right.top {
  transform: rotateY(90deg) rotateX(45deg) translateZ(14vmin);
}

.right.bottom {
  transform: rotateY(-90deg) rotateX(45deg) translateZ(-14vmin);
}

.left.bottom {
  transform: rotateY(90deg) rotateX(45deg) translateZ(-14vmin);
}

.left.top {
  transform: rotateY(90deg) rotateX(-45deg) translateZ(-14vmin);
}

.front,
.back {
  position: absolute;
  transform-style: preserve-3d;
  width: 40vmin;
  aspect-ratio: 1;
  background: rgba(5, 5, 5, 0.1);
  backdrop-filter: blur(var(--blur)) brightness(var(--brightness)) invert(1)
  saturate(0.9);
  clip-path: var(--shape);
  transform: translateZ(calc(var(--distance) * 2));
  box-shadow: inset 0 0 10rem rgba(255, 255, 5, 0.05);
}

.front {
  &:after {
    position: absolute;
    inset: 1rem;
    clip-path: var(--shape);
    background: rgba(255, 255, 255, 0.05);
    opacity: 0.8;
    display: grid;
    place-items: center;
    content: "☢︎";
    transform-style: preserve-3d;
    text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.1);
  }
}

.back {
  transform: translateZ(calc(var(--distance) * 1));
  box-shadow: inset 1rem 0 20rem rgba(222, 5, 25, 0.3);

&:nth-child(2) {
    transform: translateZ(calc(var(--distance) * 0));
    box-shadow: inset 1rem 4rem 5rem rgba(2, 55, 205, 0.35);
  }

&:nth-child(3) {
    transform: translateZ(calc(var(--distance) * -1));
    box-shadow: inset 4rem 0rem 5rem rgba(255, 200, 2, 0.3);
  }

&:nth-child(4) {
    transform: translateZ(calc(var(--distance) * -2));
    box-shadow: inset -1rem -4rem 5rem rgba(25, 5, 255, 0.2);

&:after {
      position: absolute;
      inset: 1rem;
      clip-path: var(--shape);
      background: rgba(255, 255, 255, 0.05);
      text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.1);
      opacity: 0.6;
      display: grid;
      place-items: center;
      content: "☢︎";
      z-index: -1;
    }
  }
}

$b: 1.2;
$b2: 3.35;
$bl: 0.2vmin;
$bl2: 5vmin;

@keyframes rotate {
  from {
    --rotationY: 0deg;
    --blur: #{$bl};
    --brightness: #{$b};
  }

15%,
  35%,
  65%,
  85% {
    --blur: #{$bl};
    --brightness: #{$b};
  }

25%,
  75% {
    --blur: #{$bl2};
    --brightness: #{$b2};
  }

to {
    --rotationY: 360deg;
    --blur: #{$bl};
    --brightness: #{$b};
  }
}

:root {
  --color-primary: #f4e8f1;
  --color-secondary: #75d8ee;
  --color-tertiary: #deee75;
  --color-quaternary: #9375ee;
  --color-surface: #131212;
}

* {
  box-sizing: border-box;
}

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