@import url("https://fonts.googleapis.com/css2?family=Share+Tech+Mono&display=swap");
body {
  height: 100vh;
  overflow: hidden;
  background-color: #000000;
  display: flex;
  align-items: center;
  justify-content: center;
}

h1 {
  color: rgb(0, 0, 0);
  font-family: "Share Tech Mono", "Cascadia Code", Menlo, Monaco, "Courier New", monospace;
  font-size: 6rem;
  filter: drop-shadow(0px 0px 5px currentColor);
}
h1::after {
  content: "";
  display: inline-block;
  width: 0.2em;
  height: 0.7em;
  background-color: currentColor;
  margin-left: 0.1em;
  -webkit-animation: blink 1s linear infinite forwards;
          animation: blink 1s linear infinite forwards;
  vertical-align: baseline;
}

.grid-container {
  --grid: 10rem;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  transform-style: preserve-3d;
  perspective: 100rem;
  -webkit-animation: rotate 100s linear infinite forwards;
          animation: rotate 100s linear infinite forwards;
}
.grid-container .plane {
  --dir: 1;
  width: 300%;
  height: 150%;
  min-height: 70rem;
  position: absolute;
  bottom: 0;
  transform-style: preserve-3d;
  transform-origin: bottom center;
  transform: translateX(-50%) rotateX(85deg);
}
.grid-container .plane:last-child {
  --dir: -1;
  top: 0;
  transform-origin: top center;
  transform: translateX(-50%) rotateX(-85deg);
}
.grid-container .plane:last-child > *::after {
  background-image: linear-gradient(to top, black var(--grid), rgba(0, 0, 0, 0));
}
.grid-container .plane > * {
  transform-style: preserve-3d;
  height: 100%;
  width: 100%;
  position: absolute;
}
.grid-container .plane > *::before, .grid-container .plane > *::after {
  content: "";
  display: block;
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
}
.grid-container .plane > *::before {
  background-image: repeating-linear-gradient(to left, rgb(255, 0, 0), rgb(250, 38, 38) 4px, transparent 4px, transparent var(--grid)), repeating-linear-gradient(to bottom, rgb(255, 0, 0), rgb(255, 0, 0) 4px, transparent 4px, transparent var(--grid));
  -webkit-animation: move 1s linear infinite forwards;
          animation: move 1s linear infinite forwards;
}
.grid-container .plane > *::after {
  background-image: linear-gradient(to bottom, black var(--grid), rgba(0, 0, 0, 0));
  z-index: 1;
  transform: translateZ(1px);
}
.grid-container .plane .glow {
  filter: blur(1rem);
  z-index: 1;
  mix-blend-mode: plus-lighter;
}

@-webkit-keyframes move {
  from {
    transform: translateY(0px);
  }
  to {
    transform: translateY(calc(var(--grid) * var(--dir)));
  }
}

@keyframes move {
  from {
    transform: translateY(0px);
  }
  to {
    transform: translateY(calc(var(--grid) * var(--dir)));
  }
}
@-webkit-keyframes blink {
  0% {
    visibility: visible;
  }
  50% {
    visibility: visible;
  }
  51% {
    visibility: hidden;
  }
  100% {
    visibility: hidden;
  }
}
@keyframes blink {
  0% {
    visibility: visible;
  }
  50% {
    visibility: visible;
  }
  51% {
    visibility: hidden;
  }
  100% {
    visibility: hidden;
  }
}