body {
      font-family: sans-serif;
      text-align: center;
      margin: 0;
      padding: 1rem;
      background: #202124;
      color: #eee
    }

    h1 {
      margin-top: 0;
      padding-top: 1rem
    }

    canvas {
      border: 1px solid #555;
      background: #111;
      cursor: crosshair
    }

    .toolbar {
      margin-top: .8rem;
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 1rem;
    }

    button,
    input[type=range] {
      margin: 0 .5rem
    }

    /* Color wheel styles */
    .color-picker-wrapper {
      position: relative;
      display: inline-block;
    }

    #colorWheel {
      width: 150px;
      height: 150px;
      border-radius: 50%;
      cursor: crosshair;
      border: 2px solid #444;
    }

    .color-preview {
      width: 30px;
      height: 30px;
      border-radius: 50%;
      border: 2px solid #666;
      display: inline-block;
      vertical-align: middle;
      margin-left: 10px;
    }