:root {
    --cursor-size: 42px;
    --bg: #fff;
  }
  
  .page-wrap {
    background: var(--bg);
  }
  
  #cursor {
    position: fixed;
    top: calc(var(--cursor-size) * -0.5);
    left:  calc(var(--cursor-size) * -0.5);
    pointer-events: none;
    mix-blend-mode: difference;  
    filter: url(#goo);
  }
  
  .cursor-circle {
    position: absolute;
    top: 0;
    left: 0;
    width: var(--cursor-size);
    height: var(--cursor-size);
    border-radius: var(--cursor-size);
    background: var(--bg);
    transform-origin: center center;
  }
  
  .goo {
    display: none;
  }