.sidebar {
  height: 100%;
  width: 0;
  position: fixed;
  z-index: 99;
  top: 40px;
  left: 0;
  background-color: #111;
  overflow-x: hidden;
  transition: 0.5s;
}

.sidebar a {
  text-decoration: none;
  font-size: 18px;
  color: #818181;
  display: block;
  transition: 0.3s;
}

.sidebar a:hover {
  color: #f1f1f1;
}

.sidebar .closebtn {
  position: absolute;
  top: 10px;
  right: 10px;
}

.openbtn {
  width: 19vw;
  height: 60px;
  cursor: pointer;
  border: none;
  background: url(../images/icons/mobile-menu.png) no-repeat center;
}

.openbtn:hover {
  background-color: #444;
}

/* On smaller screens, where height is less than 450px, change the style of the sidenav (less padding and a smaller font size) */
@media screen and (max-height: 450px) {
  .sidebar {
    padding-top: 15px;
  }

  .sidebar a {
    font-size: 18px;
  }
}
