body {
  background-color: black;
  color: white;
  font-family: Tahoma, Verdana, sans-serif;
  text-align: center;
}

h1 {
  background-color: black;
  color: white;
  font-family: Tahoma, Verdana, sans-serif;
  font-size: 36pt;
  font-weight: bolder;
  text-align: left;
}

h2 {
  background-color: black;
  color: white;
  font-family: Tahoma, Verdana, sans-serif;
  font-size: 24pt;
  font-weight: bolder;
  text-align: center;
}

div.menu_holder {
  display: block;
}

div.tab {
  display: inline-block;
  font-family: Tahoma, Verdana, sans-serif;
  font-size: 16pt;
  font-weight: bolder;
  text-align: center;
  width: 200px;
  border-style: solid;
  border-width: 3px;
  border-color: white;
}

div.menu {
  display: none;
  position: relative;
  width: 200px;
  text-align: center;
}
div.tab:hover {
  background-color: grey;
  color: black;
}

div.tab:active {
  background-color: grey;
  color: blue;
}