html, body{
  max-width: 99vw;
}

.navbar{
  display:flex;
  justify-content: center;
  position: fixed;
  left: 0;
  top: 0;
  height: 5vh;
  max-height: 30px;
  z-index: 1;
  background-color: white;
  text-align: justify;
  border-top: 3px grey outset;
  border-bottom: 1px black outset;
  width: 100vw;
}

.navbar img{
  height: 5vh;
  max-height: 30px;
  padding: 0 30px;
}

.menuArea {
  top: 5vh;
  position: fixed;
  max-height: 0;
  display: none;
  z-index: 1;
  flex-flow: row wrap;
}

.mainMenu {
  display: flex;
  flex-flow: column nowrap;
  align-self: flex-start; 
  width: min-content;
  overflow: hidden;
  background-color: white;
  border: 3px grey inset;
  z-index:2;
  padding: 0 10px;
}

input.mainMenu {
  display: none;
}

.selector {
  line-height: 2em;
  text-decoration: underline;
}

.subMenu {
  display:flex;
  background-color: white;
  z-index: 3;
  padding: 0 10px;
  border: 2px grey inset;
  line-height: 2em;
}

input:checked ~ .menuArea{
  max-height: 100%;
  display: flex;
  position: absolute;
  border: 2px darkgrey ridge;
}

input:checked + label, .activePage {
  font-weight: bold;
}

iframe {
  position: absolute;
  top: 5vw;
  left: 0;
  width: 98vw;
  height: 97vh;
  padding: 0;
}

label {
  cursor: pointer;
}

ul {
  margin-left: -15px;
}

.link{
  cursor: pointer;
  text-decoration: underline;
}

a, a:visited {
  color: black;
}