body
{
    background-color: white;
    overflow: auto;
}

/* The side navigation menu */
.sidebar {
  margin: 0;
  padding: 0;
  width: 200px;
  background-color: #f1f1f1;
  position:absolute;
  height: 100%;
  overflow: auto;
  font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Sidebar links */
.sidebar a {
  display: block;
  color: black;
  padding: 16px;
  text-decoration: none;
}

/* Active/current link */
.sidebar a.active {
  background-color: #4CAF50;
  color: white;
}

/* Links on mouse-over */
.sidebar a:hover:not(.active) {
  background-color: #555;
  color: white;
}

/* Page content. The value of the margin-left property should match the value of the sidebar's width property */
div.content {
  margin-left: 200px;
  padding: 1px 16px;
  max-height: 200px;
}


/* https://www.w3schools.com/howto/howto_js_topnav_responsive.asp */