html, body {
      margin: 0; padding: 0;
      background: #000;
      width: 100%; height: 100%;
    }
    #app {
      display: flex;
      justify-content: flex-start;
      align-items: center;
      width: 100vw;
      height: 100vh;
      overflow: hidden;
      scrollbar-color: #444 #000;
    }
    #drawCanvas {
      max-width: calc(100vw - 30%);
      max-height: 100vh;
      width: 100%;
      height: auto;
      aspect-ratio: 40 / 28;
      background: black;
    }
    canvas {
      display: block;
      image-rendering: pixelated;
    }
    #sidebar {
      width: 30%;
      flex: 0 0 30%;
      height: 100vh;
      display: flex;
      flex-direction: column;
      border-left: 2px solid #444;
      justify-content: flex-start;
      align-self: flex-start;
      overflow-y: auto;
    }
    #tools {
      height: 60px;
      display: flex;
      border-bottom: 2px solid #444;
      align-items: center;
      justify-content: center;
      background: #111;
    }
    #tools > div:first-child {
      display: flex;
      flex-direction: row;
      padding-right: 13px;
    }
    #tools > div:last-child {
      display: flex;
      flex-direction: row;
      border-left: 2px solid #444;
      padding-left: 13px;
    }
    #palette {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(32px, 1fr));
      gap: 4px;
      padding: 4px;
      background: #111;
      border-bottom: 2px solid #444;
    }
    #bg-palette {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(32px, 1fr));
      gap: 4px;
      padding: 4px;
      background: #111;
      border-bottom: 2px solid #444;
    }

    .palette-swatch {
      width: 100%;
      max-width: 32px;
      aspect-ratio: 1;
      cursor: pointer;
      border: 2px solid transparent;
    }
    .palette-selected {
      border-color: white;
    }
    .tool-button {
      width: 24px;
      height: 24px;
      cursor: pointer;
      border: 2px solid transparent;
    }
    .tool-selected {
      border-color: white;
    }
    #pickerCanvas {
      flex: 0 0 auto;
      background: black;
      image-rendering: pixelated;
    }