.button_container {
  position: fixed;
  top: 2%;
  right: 2%;
  height: 30px;
  width: 30px;
  cursor: pointer;
  z-index: 9999;
  transition: opacity .16.6s ease;
    transform-origin: center center; 
    mix-blend-mode: exclusion;
}
.button_container:hover {
  opacity: .7;
}
.button_container.active {

    transition: 0.3s;
}
.button_container span {
  background: #fff;
  border: none;
  height: 3px;
  width: 100%;
  position: absolute;
  top: 0;
  left: 0;
  transition: all .35s ease;
  cursor: pointer;
}
.button_container span:nth-of-type(2) {
  top: 9px;
}
.button_container span:nth-of-type(3) {
  top: 19px;
}

.button_container.active .top {
  transform: translateY(8px) translateX(0) rotate(45deg);
  background: #FFF;
}
.button_container.active .middle {
  opacity: 0;
  background: #FFF;
}
.button_container.active .bottom {
  transform: translateY(-11px) translateX(0) rotate(-45deg);
  background: #FFF;
}


.overlay {
  position: fixed;
  background: #000;
  top: 0;
  left: 0;
  width: 100%;
  height: 0%;
  opacity: 0;
  visibility: hidden;
  transition: opacity .35s, visibility .35s, height .35s;
  overflow: hidden;
  z-index: 999;
}
.overlay.open {
  background: rgba(0,0,0,0.7);
  opacity: 1;
  visibility: visible;
  height: 100%;
}
.overlay.open li {
  animation: fadeInRight .5s ease forwards;
  animation-delay: .35s;
}
.overlay.open li:nth-of-type(2) {
  animation-delay: .4s;
}
.overlay.open li:nth-of-type(3) {
  animation-delay: .45s;
}
.overlay.open li:nth-of-type(4) {
  animation-delay: .50s;
}
.overlay nav {
  position: relative;
  height: 70%;
    top: 50%;
    -webkit-transform: translateY(-50%);
    transform: translateY(-50%);    
    font-size: 1.5em;
  font-weight: 400;
  text-align: center;
    text-transform: uppercase;
}
.overlay ul {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  display: inline-block;
  position: relative;
  height: 100%;
  width: 50%;
  opacity: 0.7;
}
.overlay ul li {
  display: block;
  height: 16.6%;
  vertical-align: middle;
  height: calc(100% / 6);
  min-height: 50px;
  position: relative;
  opacity: 0;
}
.overlay ul li a {
  display: block;
  position: relative;
  color: #FFF;
  text-decoration: none;
  overflow: hidden;
    transition: 0.3s;
  vertical-align: middle; 
    top: 50%;
    -webkit-transform: translateY(-50%);
    transform: translateY(-50%);  
    font-size: 35px;
}

.overlay ul li.socials a {
    display: inline-block;
    margin: 0px 10px;
}

.overlay ul li a:hover:after, .overlay ul li a:focus:after, .overlay ul li a:active:after {
  width: 100%;
}

.overlay ul li a:hover {
    opacity: 1;
}

biography.overlay{
	background-color: yellow; 
}

@keyframes fadeInRight {
  0% {
    opacity: 0;
    left: 20%;
  }
  100% {
    opacity: 1;
    left: 0;
  }
}