* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

.navbar {
  overflow: hidden;
  background-color: brown;
  font-family: Arial, Helvetica, sans-serif;
  margin-top: 15px;
  margin-bottom: 5px;
  border-radius: 25px;
  border: solid black 3px;  
}
/* Active link in navbar. */
.navbar a {
  float: left;
  font-size: 16px;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}
/* Inactive Navbar styling. */
.dropdown {
  float: left;
  overflow: hidden;
}

.dropdown .dropbtn {
  font-size: 16px;  
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font: inherit;
  border: none;
  margin: 0;
}

.navbar a:hover, .dropdown:hover .dropbtn {
  background-color: #330099;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #99ff66;
  width: 50%;
  left: 19%;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  padding: 20px;
  border: 6px black solid;
  border-radius: 25px;
    z-index: 1;
}

.dropdown-content .header {
  background-color: #99ff66;
  padding: 16px;
  color: black;
  text-align: center;   
}

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

/* Create three equal columns that floats next to each other. Content heading styles */
.column {
  float: left;
  width: 33.33%;
  padding: 10px;
  background-color: #99ff66;
  height: 175px;
  color: black;  
  text-align: center;
}

/* Links in drop-down. Link styles.*/
.column a {
  float: none;
  color: black;
  padding: 5px;
  text-decoration: underline;
  display: block;
  text-align: center;
}

.column a:hover {
  background-color: #ddd;
}

/* Clear floats after the columns */
.row:after {
  content: "";
  display: table;
  clear: both;
}

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