* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

.mnavbar {
  overflow: hidden;
  background-color: #0300B3;
  font-family: Prompt, sans-serif;
  font-size: 22px;
}

.mnavbar a {
  float: left;
  font-size: 22px;
  color: #ffffff ;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

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

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

.mnavbar a:hover, .mdropdown:hover .dropbtn {
  background-color: white;
  color: #000000;
}

.mdropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  width: 97%;
  left: 20px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 999;
}

.mdropdown-content .mheader {
  background: red;
  padding: 16px;
  color: white;
}

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

/* Create three equal columns that floats next to each other */
.mcolumn {
  float: left;
  width: 33.33%;
  padding: 10px;
  background-color: #fff;
  height: 320px;
}

.mcolumn a {
  float: none;
  color: black;
  padding: 6px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.mcolumn a:hover {
  background-color: #9999ff;
}

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

@media (max-width: 767px) {
.mnavbar {
  overflow: hidden;
  background-color: #22a6e7;
  font-family: Prompt, sans-serif;
  font-size: 18px;
}

.mnavbar a {
  float: left;
  font-size: 18px;
  color: black;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}
}