html, body { 
  background: black;
}

#imagediv { 
  position: absolute;
  left: 0px;
  top: 0px;
  width: 100%;
  height: 100%;
  background-size: contain;
}

#tools { 
  position: absolute;
  bottom: 10px;
  right: 10px;
  width: 90px;
  height: 38px;
}

svg { 
  display: inline-block;
}
#zoomin, #zoomout { 
  width: 36px;
  height: 36px;
  margin: 3px;
}
circle { 
  stroke: black;
  stroke-width: 1;
  fill: orange;
}

line { 
  stroke: black;
  stroke-width: 3;
}

.ibw-platform-ipad-bookwidgets #zoomin, .ibw-platform-ipad-bookwidgets #zoomout,
.ibw-platform-android-chrome #zoomin, .ibw-platform-android-chrome #zoomout,
.ibw-platform-android #zoomin, .ibw-platform-android #zoomout
{ 
  display: none;
}