@charset "utf-8";
/* CSS Document */
 /* The navigation bar */


.topnav {
  overflow: hidden;
  background-color: #fff;
  position: fixed;
  top: -1px;
  width: 100%;
}

.topnav a {
  float: left;
  display: block;
  color: #333;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.iconright a {
  float: right;
  display: block;
  color: #333;
  text-align: center;
  padding: 6px 6px;
  text-decoration: none;
  font-size: 17px;
}

.active {
  background-color: #4CAF50;
  color: green;
}

.topnav .icon {
  display: none;
}

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

.dropdown .dropbtn {
  font-size: 17px;    
  border: none;
  outline: none;
  color: #333;
  padding: 14px 10px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

.dropdown-content {
  display: none;
  position: fixed;
  background-color: white;
  padding: 14px 10px;
  min-width: 160px;
  box-shadow: 2px 4px 8px 0px rgba(0, 0, 0, 0.2);
  z-index: 1;
}
.main {
  padding: 16px;
  margin-top: 10px;
  height: 1px;  Used in this example to enable scrolling */
}
.dropdown-content a {
  float: none;
  color: #333;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.topnav a:hover, .dropdown:hover .dropbtn {
  background-color: white;
  color: green;

}

.dropdown-content a:hover {
  background-color: #f2f2f2;
  color: black;

}

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

}

@media screen and (max-width: 500px) {
  .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;
  }
}

div.tooltip-wrap {
  position: static;
    
}
div.tooltip-wrap div.tooltip-content {
  display: none;
  font: Verdana;
  position: static;
  top: 20%;
  bottom: 20%;
  left: 20%;
  right: 20%;
  background-color: #f2f2f2;
  
  
}
div.tooltip-wrap:hover div.tooltip-content {
  display: block;
  opacity:.7;
}

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

<style>
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Verdana;
 
}

.header {
  text-align: center;
  padding: 32px;
}

.row {
  display: -ms-flexbox; /* IE10 */
  display: flex;
  -ms-flex-wrap: wrap; /* IE10 */
  flex-wrap: wrap;
  padding: 0 4px;
}

/* Create four equal columns that sits next to each other */
.column {
  -ms-flex: 25%; /* IE10 */
  flex: 25%;
  max-width: 25%;
  padding: 0 4px;
}

.column img {
  margin-top: 8px;
  vertical-align: middle;
  width: 100%;
}

/* Responsive layout - makes a two column-layout instead of four columns */
@media screen and (max-width: 800px) {
  .column {
    -ms-flex: 50%;
    flex: 50%;
    max-width: 50%;
  }
}

/* Responsive layout - makes the two columns stack on top of each other instead of next to each other */
@media screen and (max-width: 600px) {
  .column {
    -ms-flex: 100%;
    flex: 100%;
    max-width: 100%;
  }
}

</style>