*,
*::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,
button,
img {
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

button {
  background-color: transparent;
  border: none;
  outline: none;
}

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

body {
  height: 100vh;
  overflow: hidden;
}

.container {
  height: 100vh;
  width: 100%;
  background-color: #222;
  overflow: hidden;

  &::before,
  &::after,
  .circle1,
  .circle2 {
    content: '';
    position: absolute;
    width: 20vmax;
    height: 20vmax;
    width: 100%;
    height: 100%;
    background-color: #00ffff44;
    border-radius: 50%;
    filter: blur(100px);
    mix-blend-mode: plus-lighter;
  }

  &::before {
    top: -20%;
    left: 0;
    animation: move 4s linear alternate both infinite;
  }

  .circle1 {
    left: -20%;
    top: 0;
    animation: move2 4s linear alternate-reverse both infinite;
  }

  .circle2 {
    right: -20%;
    bottom: 0;
    animation: move2 4s linear alternate both infinite;
  }

  &::after {
    bottom: -20%;
    right: 0;
    animation: move 4s linear alternate-reverse both infinite;
  }
}

@keyframes move {
  0% {
    left: 0;
  }
  100% {
    left: calc(100% - 20vmax);
  }
}

@keyframes move2 {
  0% {
    top: 0;
  }
  100% {
    top: calc(100% - 20vmax);
  }
}