/* Background */
.background {
    top: 0;
    left: 0;
    overflow: hidden;
    position: fixed;
    width: 100%;
    min-height: 100vh;
  }
  
  /* Circles Component */
  .circles-overlay {
    position: relative;
    width: 100%;
    min-height: 100vh;
  }
  
  .circle {
    background-color: rgba(173, 216, 230, 0.7);
    box-shadow: inset 0 0 20px 2px rgb(255, 255, 255);
    height: 310px;
    width: 300px;
    border-radius: 100%;
    position: absolute;
  }
  
  #circle-1 {
    transform-origin: left;
    left: 30vw;
    animation: rotate-circle 30s infinite ease-in-out;
  }
  
  #circle-2 {
    transform-origin: right;
    right: 35vw;
    animation: rotate-circle-reverse 40s infinite ease-in-out;
  }
  
  #circle-3 {
    transform-origin: top;
    top: 30vh;
    animation: rotate-circle 35s infinite ease-in-out;
  }
  
  #circle-4 {
    transform-origin: right;
    top: 25vh;
    left: 25vw;
    animation: rotate-circle-reverse 30s infinite ease-in-out;
  }
  
  @keyframes rotate-circle {
    0% {
      opacity: 1;
      transform: rotate(0deg);
    }
    50% {
      opacity: 0;
      transform: rotate(360deg);
    }
    100% {
      opacity: 1;
      transform: rotate(0deg);
    }
  }
  
  @keyframes rotate-circle-reverse {
    0% {
      opacity: 0.2;
      transform: rotate(0deg);
    }
    50% {
      opacity: 1;
      transform: rotate(-360deg);
    }
    100% {
      opacity: 0.2;
      transform: rotate(0deg);
    }
  }