.helloworld-plugin {
  padding:5px;
  border-bottom:1px solid #e5e5e5;
}

.helloworld-plugin button {
  outline:none;
  border:none;
  display:inline-block;
  width:20px;
  height:20px;
  border-radius:50%;
  cursor:pointer;
  opacity:0.5;
  margin:4px;
}

.helloworld-plugin button.selected,
.helloworld-plugin button:hover {
  opacity:1;
}

svg.a9s-annotationlayer .a9s-annotation.RED .a9s-outer {
  stroke:red;
  stroke-width:3;
  fill:rgba(255, 0, 0, 0.3);
}

svg.a9s-annotationlayer .a9s-annotation.GREEN .a9s-outer {
  stroke:green;
  stroke-width:3;
  fill:rgba(0, 255, 0, 0.3);
}

svg.a9s-annotationlayer .a9s-annotation.BLUE .a9s-outer {
  stroke:blue;
  stroke-width:3;
  fill:rgba(0, 0, 255, 0.3);
}

svg.a9s-annotationlayer .a9s-annotation.RED .a9s-inner,
svg.a9s-annotationlayer .a9s-annotation.GREEN .a9s-inner,
svg.a9s-annotationlayer .a9s-annotation.BLUE .a9s-inner {
  fill:transparent;
  stroke:none;
}