body {
  margin: 0;
  font-family: Helvetica-light, sans-serif;
}

.overlay {
  height: 0%;
  width: 100%;
  position: fixed;
  z-index: 1;
  top: 0;
  left: 0;
  background-color: rgb(0, 0, 0);
  overflow-y: hidden;
  transition: 0.5s;
}

.overlay-content {
  position: relative;
  top: 25%;
  width: 100%;
  text-align: center;
  margin-top: 30px;
}

.overlay a {
  padding: 8px;
  text-decoration: none;
  font-size: 20px;
  color: #818181;
  display: block;
  transition: 0.3s;
}

.overlay a:hover, .overlay a:focus {
  color: #f1f1f1;
}

.overlay .closebtn {
  position: absolute;
  top: 20px;
  right: 45px;
  font-size: 60px;
}

#menu_vertical {
  position: absolute;
  top: 60px;
  right: 75px;
  display: none;
  text-shadow: -1px 0 black, 0 1px black, 1px 0 black, 0 -1px black;
  color:white;
  font-size:5em!important;
}