* {
  margin: 0;
  border: 0;
  padding: 0;

  font-family: 'Roboto', sans-serif;
  box-sizing: border-box;

  -webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none; /* Safari */
     -khtml-user-select: none; /* Konqueror HTML */
       -moz-user-select: none; /* Old versions of Firefox */
        -ms-user-select: none; /* Internet Explorer/Edge */
            user-select: none; /* Non-prefixed version, currently
                                  supported by Chrome, Edge, Opera and Firefox */
}

body {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  flex: 1;
  
  height: 100vh;

  background: #000;
  color: #fff;
  
  overflow: hidden;
}

#container {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  flex: 8;

  /*width: 100%;*/
  height: 100%;
  /*background: brown;*/
}

canvas {
  border-radius: 4px;
  border-width: 1px;

  margin: 1px;

  padding-left: 0;
  padding-right: 0;
  margin-left: auto;
  margin-right: auto;
  display: block;
  /*position: center;*/
  /*position:absolute;*/
}

#canvasBack {
  border: 1px solid #500cce;
  background: #500cce;
  z-index: 0;
}

#canvasFront {
  position: absolute;
  border: 1px solid transparent;
  background: rgba(0,200,0,0.5);
  background: transparent;
  z-index: 1;
}

#gems {
  display: none;
}