/**
 * All of the CSS for your public-facing functionality should be
 * included in this file.
 */
 div.google-visualization-tooltip {
    border-radius:5px;
    background:rgba(0, 0 , 0, 0.5);
  }
  div.google-visualization-tooltip > ul > li > span {
    color:#fff;
  }

  div.secondary-heading a {
    text-decoration: none;
  }