.relativeReference {
  position: relative;
  height: 0;
}

html, body, div {
  box-sizing: border-box;
}

html {
  height: 100%;
}

body {
  margin: 0;
  height: 100%;
}

#main {
  min-height: 100%;
}

#title {
  position: relative;
  z-index: 1;
  margin: 0;
  height: 5em;
  background: radial-gradient(circle at 70% 30%, white 0%, lightblue 100%);
}

#menu {
  position: fixed;
  left: 0;
  top: 0;
  height: 100%;
  width: 6em;
  margin: 0;
  border: none;
  background: radial-gradient(circle at 50% 90%, white 10%, lightblue 98%, grey 100%);
}

#divContent {
  width: 100%;
  height: auto;
  padding-left: 7em;
  padding-bottom: 5em;
  margin: 0;
}

#content {
  width: 100%;
  border-width: 0;
}

#footer {
  position: relative;
  top: -5em;
  height: 5em;
  bottom: 0px;
  padding: 1em;
  text-align: center;
  background: radial-gradient(circle at 0% 0%, white 10%, lightblue);
}

h1 {
  padding: 0.5em;
  margin: 0;
}

sub {
  color: #BBB;
}