html, body {
  margin: 0;
  font-size: 10px;
}

*::-moz-focus-inner {
  border: none;
}
*:focus {
  outline: none;
}

div#container {
  position: absolute;
}

canvas {
  border: 1px solid gray;
  position: absolute;
  top: 0;
  left: 0;
}

header {
  width: 100%;
  height: 5rem;
  background: #4d4d4d;
  background: -moz-linear-gradient(top, #4d4d4d 0%, #333333 100%);
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#4d4d4d), color-stop(100%,#333333));
  background: -webkit-linear-gradient(top, #4d4d4d 0%,#333333 100%);
  background: -o-linear-gradient(top, #4d4d4d 0%,#333333 100%);
  background: -ms-linear-gradient(top, #4d4d4d 0%,#333333 100%);
  background: linear-gradient(to bottom, #4d4d4d 0%,#333333 100%);
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#4d4d4d', endColorstr='#333333',GradientType=0 );

  #menu {
    width: 3rem;
    height: 5rem;
    position: relative;
    lefT: -0.9rem;
    background: url('imgs/menu.png') center center no-repeat, darken(#4d4d4d, 10%);
    -moz-appearance: none;
    border: none;
  }
}