* {
  margin: 0;
  padding: 0;
  border: 0;
}

#navigation {
  list-style-type: none;
}

#navigation p {
  display: none;
}

#navigation li {
  position: absolute;
  font-size: 3em;
  border: 3px solid black;
  padding: 0.2em 0.4em;
  z-index: 2;
  cursor: pointer;
}

#home:before {
  content: "\2302";
}

#back:before {
  content: "\21e6";
}

#forward:before {
  content: "\21e8";
}

#home {
  right: 0;
  top: 0;
}

#back {
  bottom: 0;
  left: 0
}

#forward {
  bottom: 0;
  right: 0;
}

h1 {
  text-align: center;
  font-size: 8em;
  font-family: serif;
  font-weight: lighter;
}

#content {
  z-index: 1;
  height: 100%;
  width: 100%;
  display: flex;
  position: absolute;
  flex-direction: column;
  overflow: hidden;
}

#art-content {
  flex: 1 1 auto;
  overflow: hidden;
  display: block;
}

#art {
  display: block;
  margin: 0 auto ;
  max-width: 80%;
  max-height: 100%;
}

#title {
    text-align: center;
    font-size: 2em;
    margin: 1em;
}

#index {
    overflow-y: scroll;
    max-height: 100%;
}

#index img {
    max-width: 10em;
    max-height: 10em;
    display: block;
    margin: 0 auto 1em auto;
    cursor: pointer;
}

#index div {
    width: 10em;
    display: inline-block;
    margin: 1em;
    text-align: center;
}