.button_container {
  position: absolute;
  top: 40px;
  left: 5%;
  height: 37px;
  width: 45px;
  cursor: pointer;
  z-index: 5001;
  -webkit-transition: opacity .25s ease;
  transition: opacity .25s ease;
}
.button_container:hover {
  opacity: .7;
}
.button_container.active .top {
  -webkit-transform: translateY(15px) translateX(0) rotate(45deg);
          transform: translateY(15px) translateX(0) rotate(45deg);
  background: #fff;
}
.button_container.active .middle {
  opacity: 0;
  background: #fff;
}
.button_container.active .bottom {
  -webkit-transform: translateY(-15px) translateX(0) rotate(-45deg);
          transform: translateY(-15px) translateX(0) rotate(-45deg);
  background: #fff;
}
.button_container span {
  background: #231F20;
  border: none;
  height: 5px;
  width: 100%;
  position: absolute;
  top: 0px;
  left: 0;
  -webkit-transition: all .35s ease;
  transition: all .35s ease;
  cursor: pointer;
}
.button_container span:nth-of-type(2) {
  top: 15px;
}
.button_container span:nth-of-type(3) {
  top: 30px;
}

#overlay {
	width:100%;
	height:100vh;
	position:fixed;
	top:0;
	left:0;
	z-index:1000;
	background:rgba(0,0,0,0.75);
	transition:all .3s;
	opacity:0;
	pointer-events:none;
}

#overlay.open {
	opacity:1;
	pointer-events:all;
}

#overlay.open .obscure {
	width:100%;
	height:100vh;
	position:fixed;
	position:fixed;
	top:0;
	left:0;
	
}
.overlay-menu {
	width:50%;
	min-width:300px;
	height:100vh;
	background:black;
	color:white;
	transition:all .3s;
	transform:translateX(-100%);
	overflow:hidden;
}


#overlay.open .overlay-menu {
	transform:translateX(0%)
}

.overlay-menu ul {
	margin:0;
	padding:15vh 18%;
	list-style-type:none;
}

.overlay-menu li {
	padding:0;
	height:7vh;
	font-size:25px;
}


    @media screen and (max-width:850px) {
		.overlay-menu li {
			font-size:18px;
		}
	}