.overlay {
  height: 100%;
  width: 0;
  position: fixed;
  z-index: 1;
  top: 0;
  left: 0;
  background-color: #e6b3e6;
  overflow-x: hidden;
  transition: 0.5s;
}

.overlay-content {
  position: relative;
  top: 25%;
  width: 100%;
  text-align: center;
  margin-bottom: 10px;
}

.overlay a {
  padding: 8px;
  text-decoration: none;
  font-size: 6vw;
  color: #993399;
  font-weight: bold;
  display: block;
  transition: 0.3s;
}

.overlay a:hover, .overlay a:focus {
  color: green;
}

.overlay .closebtn {
  position: absolute;
  top: 30px;
  right: 45px;
  font-size: 8vw;
}

@media screen and (max-width: 500px) {

  .overlay-content {
    top: 15%;
  }

}