*,
*::after,
*::before {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans',
    'Helvetica Neue';
}

a {
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: white transparent;
}

body {
  height: 100vh;
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  place-content: center;
  background-color: #000;
  overflow: hidden;
}

.container {
  position: absolute;
  top: 25%;
  left: 25%;
  perspective: 500px;
  transform-style: preserve-3d;
  transform: rotateX(60deg);

  @media (width <= 888px) {
    top: 50%;
  }

  .box {
    transform-style: preserve-3d;
    position: absolute;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vw;
    border: 10vmax solid #222;
    box-shadow: 0 0 0 0.5vw #e9e9e9, 0 0 0 0.5vw #e9e9e9 inset;
    background-color: #000;
    animation: rotar 18s linear infinite;

    .linter {
      position: absolute;
    }

    .left {
      left: -7.5vmax;
      top: -8vmax;
      width: 1.5vmax;
      height: 95vw;
      background-image: linear-gradient(to top, yellow, springgreen, skyblue);
      transform-origin: bottom;
      animation: crecerY 2s linear both;
    }

    .top {
      left: -7.5vmax;
      top: -8vmax;
      height: 1.5vmax;
      width: 95vw;
      background-image: linear-gradient(
        to right,
        yellow,
        springgreen,
        skyblue
      );
      transform-origin: left;
      animation: crecerX 2s linear both;
      animation-delay: 2s;
    }
    .right {
      right: -7.5vmax;
      top: -8vmax;
      width: 1.5vmax;
      height: 95vw;
      transform-origin: top;
      background-image: linear-gradient(
        to bottom,
        yellow,
        springgreen,
        skyblue
      );
      animation: crecerY 6s linear both;
      animation-delay: 4s;
    }

    .bottom {
      left: -7.5vmax;
      bottom: -8vmax;
      height: 1.5vmax;
      width: 95vw;
      transform-origin: right;
      background-image: linear-gradient(
        to left,
        yellow,
        springgreen,
        skyblue
      );
      animation: crecerX 4s linear both;
      animation-delay: 10s;
    }

    &::before {
      content: '';
      position: absolute;
      inset: -5.5vmax;
      border: 0.5vw dashed #e9e9e9;
    }
  }
}

@keyframes rotar {
  0% {
    transform: rotate(360deg);
  }
  100% {
    transform: rotate(0deg);
  }
}

@keyframes crecerY {
  0% {
    transform: scaleY(0);
  }
  100% {
    transform: scaleY(1);
  }
}

@keyframes crecerX {
  0% {
    transform: scaleX(0);
  }
  100% {
    transform: scaleX(1);
  }
}