body {margin:0;font-family:Arial; font-size: 13px;   }

.topnav {
  overflow: hidden;
  /* background-color: #333;    gray */
  border-bottom: 1px solid gray; /* From bluetabs.css */
}

.topnav a {
  float: left;
  display: block;
  color: black; /* change from  color: #f2f2f2;  /* white */
  text-align: center;
  padding: 4px 6px;  /* change from 14px 16px     */
  text-decoration: none;
  font: 12px;  /*  font-size: 10px;   change from 17px */
  border: 1px solid #778; /* added from bluetabs */
  font-weight: bold;/* added */
    margin-right: 3px; /* added */
}

.active {
  background-color: #4CAF50;   /* green */
  color:black; /* change from white */
}

.topnav .icon {
  display: none;
}

.dropdown {
    float: left;
    overflow: hidden;
}

.dropdown .dropbtn {
	font: 13px ; /*    change from 17px*/
    border: none;
    outline: none;
    color: black; /* change from white */
    padding: 4px 6px;  /* change from 14px 16px     */
    background-color: inherit;
    font-family: inherit;
    font-weight: bold;   /* added */
  	border: 1px solid #778; /* added from bluetabs */
    margin:0;
    margin-right: 3px; /* added */
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #ADD8E6; /* light blue change from #f9f9f9 - white  */
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}

.dropdown-content a {
    float: none;
    color: black; /* change from black */
    padding: 4px 6px;  /* change from 12px 16px     */
    text-decoration: none;
    display: block;
    text-align: left;
}

.topnav a:hover, .dropdown:hover .dropbtn {

  /* background-color: #ADD8E6 ;  from #555 gray */
  background-color: #0099ff;  /* change */

  color: black;  /* change from white */
  font-weight: bold;
}

.dropdown-content a:hover {
    /*background-color: #ddd;   very light gray */
        background-color: #0099ff;  /* change */

    color:  black;
}

.dropdown:hover .dropdown-content {
    display: block;

}

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child), .dropdown .dropbtn {
    display: none;
  }
  .topnav a.icon {
    float:left;  /* change from right */
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {position: relative;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;      
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
  .topnav.responsive .dropdown {float: none;}
  .topnav.responsive .dropdown-content {position: relative;}
  .topnav.responsive .dropdown .dropbtn {
    display: block;
    width: 100%;
    text-align: left;
  }
}