svg {
  max-width:100%;
}

svg .state path,
g#DC,
svg.county polyline,
svg.county path,
svg.county polygon {
  fill: #ccc;
  cursor:pointer;
}

svg .state path:hover,
g#DC:hover,
svg.county polyline:hover,
svg.county path:hover,
svg.county polygon:hover {
  fill: #333;
}