:root {
    --codeFont: 'Roboto Mono', monospace;
    --shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
  }

  body {
    font-family: Verdana, san-serif;
    max-width: 750px;
    margin:  auto;
    line-height: 1.5rem;
    padding: 0 1rem 2rem 1rem;
  }

  li {
    margin: 0.1rem;
  }

  h1 {
    text-align: center;
  }

  #error {
    visibility: hidden;
    background-color: lightpink;
    color: red;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
    padding: 0.6rem;
    position: relative;
    margin: -1rem 0;
    z-index: 1;
  }

  .heading {
    font-weight: bold;
    background-color: floralwhite;
  }

  .controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    margin: 1rem 0;
  }

  .controls select {
    font: inherit;
    margin-left: 0.3rem;
  }

  #stats {
    margin-bottom: 1rem;
  }

  /* Mazes are drawn on a stack of canvas tiles over the red background. */
  .maze-list {
    background-color: rgb(177, 31, 31);
    padding: 20px;
  }

  .maze-list[hidden] {
    display: none;
  }

  .maze-list canvas {
    display: block;
  }