body {
  font-family: 'HelveticaNeue-UltraLight', 'Helvetica Neue UltraLight', 'Helvetica Neue', Arial, Helvetica, sans-serif;
  font-size: 22px;
  line-height: 1.75;
}

.black {
  color: black;
}

.green {
  color: green;
}

.red {
  color: red;
}

.pink {
  color: #FF69B4;
}

ul {
  margin: 0;
  padding: 0;
}

li.item {
  cursor: pointer;;
  list-style: none;
}

li.item:hover {
  opacity: 0.6;
}

#relation {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

#relation .back {
  display: none;
  position: absolute;
  cursor: pointer;
  z-index: 1001;
}

#relation .back:before {
  opacity: 0.6;
  margin-top: 25px;
  margin-left: 10px;
  width: 0;
  height: 0;
  float: left;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-right: 8px solid #0d61f5;
  content: ' ';
  z-index: 1001;
}

#relation:hover .back:before {
  opacity: 1;
}

#relation .iframe {
  position: absolute;
}

#menu {
  display: none;
  position: absolute;
  left: 20px;
  top: 50px;
  z-index: 1;
}

#menu .action {
  cursor: pointer;
}