:root {
      --base: #292cd1;
      --spacing: 10px;
      --blur: 10px;
    }

    img {
      padding: var(--spacing);
      background: var(--base);
      filter: blur(var(--blur));
    }

    .hl {
      color: var(--base);
    }

    /*
      misc styles, nothing to do with CSS variables
    */

    body {
      text-align: center;
      background: #193549;
      color: white;
      font-family: 'helvetica neue', sans-serif;
      font-weight: 100;
      font-size: 50px;
    }

    .controls {
      margin-bottom: 50px;
    }

    input {
      width: 100px;
    }