.leaflet-popup-content-wrapper,
.leaflet-popup-tip
{
background: yellow;
}
html, body { margin: 0; padding: 0; font-family: Arial, sans-serif; }
#viewDiv { height: 500px; width: 100%; margin-top: 20px; }
#optionsDiv {
  position: absolute;
  top: 120px;
  left: 400px;
  background-color: white;
  border: 1px solid #ccc;
  padding: 8px;
  font-size: 14px;
  z-index: 10;
}
footer {
  position: relative;
  text-align: center;
  font-size: 12px;
  margin-top: 10px;
  background-color: #f8f8f8;
  padding: 5px;
}