html {
    height: 100%;
  }
  
  body {
    margin: 0;
    display: flex;
    align-items: flex-end;
    justify-content: stretch;
    height: 100%;
    font-family: 'Helvetica Neue', helvetica, sans-serif;
    color: white;
    font-weight: 300;
    -webkit-font-smoothing: subpixel-antialiased !important;
    overflow: hidden;
  }
  
  form {
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0.5;
    display: flex;
    flex-grow: 1;
    justify-content: flex-end;
    transition: opacity 0.3s ease;
  }
  
  .picking form {
    opacity: 0.2;
    pointer-events: none;
  }
  
  form:hover {
    opacity: 1;
  }
  
  form span {
    font-size: 13px;
    align-self: center;
    margin: 0 0.5em;
  }
  
  .btn {
    margin-left: 1em;
    opacity: 1;
    align-self: center;
    transition: opacity 0.3s ease;
  }
  
  .picking .btn {
    opacity: 0;
  }
  
  .r {
    margin-right: auto;
  }
  
  input {
    font-size: 24px;
    font-family: Menlo, "DejaVu Sans Mono", Consolas, monospace;
    border: none;
    color: white;
    background-color: transparent;
    width: 5em;
    padding: 0.5em;
    text-align: center;
  }
  
  button {
    background-color: transparent;
    border: none;
    font-family: 'Helvetica Neue', helvetica, sans-serif;
    color: white;
    font-weight: 300;
    font-size: 13px;
    opacity: 1;
    transition: opacity 0.3s ease;
    cursor: pointer;
  }
  
  .picking button {
    opacity: 0;
  }
  
  button:hover {
    background-color: rgba(0, 0, 0, 0.4);
  }
  
  button:active {
    background-color: rgba(0, 0, 0, 0.8);
  }
  
  .xhair {
    position: absolute;
    opacity: 0.6;
    top: 0;
    left: 0;
    margin-left: -20px;
    margin-top: -20px;
    width: 41px;
    height: 41px;
    pointer-events: none;
  }
  
  .xhair span {
    position: absolute;
    background-color: black;
  }
  
  .xhair.light span {
    background-color: white;
  }
  
  .xhair span:nth-child(1) {
    width: 1px;
    height: 10px;
    top: 0;
    left: 20px;
  }
  
  .xhair span:nth-child(2) {
    width: 10px;
    height: 1px;
    top: 20px;
    right: 0;
  }
  
  .xhair span:nth-child(3) {
    width: 1px;
    height: 10px;
    bottom: 0;
    left: 20px;
  }
  
  .xhair span:nth-child(4) {
    width: 10px;
    height: 1px;
    top: 20px;
    left: 0;
  }
  
  .picking .xhair {
    display: none;
  }