.fullscreenmenu button {
      border: none;
      outline:none;
  background: #00AC9A;
   }
.fullscreenmenu button:hover{
 cursor: pointer;
}
.menu, .menu span {
  display: inline-block;
  -webkit-transition: all .4s;
  transition: all .4s;
  box-sizing: border-box;
}
.menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 60px;
  height: 50px;
  z-index: 3000;
}
.menu span {
  position: absolute;
  left: 30%;
  width: 40%;
  height: 2px;
  background-color: #FFF;
  z-index: 30;
}
.menu span:nth-of-type(1) {
  top: 14px;
}
.menu span:nth-of-type(2) {
  top: 24px;
}
.menu span:nth-of-type(3) {
  bottom: 14px;
}

.menu.active span:nth-of-type(1) {
  -webkit-transform: translateY(10px) rotate(45deg);
  transform: translateY(10px) rotate(45deg);
}
.menu.active span:nth-of-type(2) {
  opacity: 0;
}
.menu.active span:nth-of-type(3) {
  -webkit-transform: translateY(-10px) rotate(-45deg);
  transform: translateY(-10px) rotate(-45deg);
}
#nav {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 1000;
  width: 100%;
  height: 100vh;
  opacity: 0;
  background-color: rgba(0,172,154,0.9);
  transition: all 0.3s ease-in-out;
  visibility: hidden;
}
#nav.active {
  right: 0;
  opacity: 1;
  -moz-transform: translateX(0);
  -webkit-transform: translateX(0);
  transform: translateX(0);
  visibility: visible;
}
#nav ul {
  margin: 10% 0 0;
  padding: 20px 0;
}
#nav ul li {
  list-style-type: none;
}
#nav ul li a {
  display: block;
  padding: 20px 0;
  transition: all 0.2s ease-in-out;
  text-align: center;
  text-decoration: none;
  color: #FFF700;
 font-size:1.4em;
}
#nav ul li a:hover {
  color: #FFFFFF;
}
#nav button{
}

@media screen and (max-width: 767px) {
#nav ul {
  margin: 20% 0 0;
  padding: 20px 0;
}
}