body {
  margin: 0;
  padding: 10px;
  background-color: blue;
  height: 100vh;
  overflow-y: hidden;
}

.nav {
  position: fixed;
  z-index: 100 !important;
  left: 18px;
  bottom: 10px;

  font-size: 3em;
  font-family: Arial;
}

a {
  text-decoration: none;
}

a:hover {
  color: skyblue;
}

.on {
  color: skyblue;
}

.off {
  color: black;
}

iframe {
  height: 99vh !important;
  border: none;
  width: 95%;
  margin-left: 50px;
  /* transform: skew(10deg,5deg); */
  /* filter: drop-shadow(10px 4px 4px black); */
}