.column {
  float: left;
  width: 33.33%;
}

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

/* Style the navbar */
#navbar {
  overflow: hidden;
  display: flex;
  justify-content: space-between;
  opacity: 0.6;
  background-color: #5555;
}

/* Navbar links */
#navbar iframe {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px;
  text-decoration: none;
}
#navbar iframe.active {
  background-color: #04AA6D;
  color: white;
}

/* Page content */
.content {
  padding: 16px;
}

/* The sticky class is added to the navbar with JS when it reaches its scroll position */
.sticky {
  position: fixed;
  top: 0;
  width: 100%;
}

/* Add some top padding to the page content to prevent sudden quick movement (as the navigation bar gets a new position at the top of the page (position:fixed and top:0) */
.sticky + .content {
  padding-top: 60px;
}