#header{
 width: 100%;
 height: 100px;
 background:rgba(42,65,95,0.45);
 position: fixed;
 top:0px;
 z-index:7;
}

.menu-toggle{
 position: fixed;
 top: 2.5rem;
 right: 2.5rem;
 color: #FFF;
 font-size: 2.5rem;
 cursor: pointer;
 z-index: 10;
 display: none;
}

#nav_menu{
 min-width: 100%;
 padding-top:20px;
 display: flex;
 justify-content: space-between;
 align-items: center;
 text-transform: uppercase;
 font-size: 1.6rem;
}

.brand{
 margin: 0 0 0 10px;
 font-size:2rem;
 transform: translateX(-77rem);
 animation: slideIn .5s forwards;
 font-family:"PyeongChangPeace-Bold","Tenada","NEXON Lv1 Gothic OTF","Noto Serif KR", "Apple SD Gothic Neo", "Malgun Gothic", serif;
}
.brand a{
color: #FFF;
}
.brand span{
 color: crimson;
}

#nav_menu ul{
 display: flex;
 margin-right: 20px;
}

#nav_menu ul li{
 list-style: none;
 transform: translateX(77rem);
 animation: slideIn .5s forwards;
}

#nav_menu ul li:nth-child(1){
 animation-delay: 0s;
}

#nav_menu ul li:nth-child(2){
 animation-delay: .33s;
}

#nav_menu ul li:nth-child(3){
 animation-delay: .65s;
}

#nav_menu ul li:nth-child(4){
 animation-delay: 1s;
}

#nav_menu ul li a{
 font-family:"Tenada","NEXON Lv1 Gothic OTF","Noto Serif KR", "Apple SD Gothic Neo", "Malgun Gothic", serif;
 font-weight: 700;
 font-size: 1.25rem;
 color: #FFF;
 padding: 12px 0 5px 0;
 margin: 0 3rem;
 position: relative;
}

#nav_menu ul li a:last-child{
 margin-right: 0;
}

#nav_menu ul li a::before,
#nav_menu ul li a::after{
 content: '';
 position: absolute;
 width: 100%;
 height: 5px;
 background-color: #FFF;
 left: 0;
 transform: scaleX(0);
 transition: all .5s;
}

#nav_menu ul li a::before{
 top: 0;
 transform-origin: left;
}

#nav_menu ul li a::after{
 bottom: 0;
 transform-origin: right;
}

.overlay{
 background-color: rgba(0,0,0,0.8);
 position: fixed;
 right: 0;
 left: 0;
 top: 0;
 bottom: 0;
 transition: opacity 650ms;
 transform: scale(0);
 opacity: 0;
 display: none;
}

#nav_menu ul li a:hover::before,
#nav_menu ul li a:hover::after{
 transform: scaleX(1);
}

@keyframes slideIn {
 from{

 }
 to{
  transform: translateX(0);
 }
}

@media screen and (max-width: 768px){
 .menu-toggle{
  display: block;
 }
 .menu-toggle i{
 position: relative;
 top:-10px;
 right:-15px;
 }
 #nav_menu{
  padding-top:50px;
  flex-direction: column;
  justify-content: space-evenly;
  align-items: center;
  text-align: center;
 }
 #nav_menu ul{
  flex-direction: column;
  margin: 50px 0 0 0;
  display: none;
 }
 #nav_menu ul li{
  margin-top: 4.5rem;
 }
 #nav_menu ul li a{
  margin:0px;
  font-size: 1.85rem !important;
 }
 .brand{
 position:absolute;
 top:33px;
 left:7px;
 font-size:2rem;
 transform: translateX(-77rem);
 animation: slideIn .5s forwards;
 font-family: 'PyeongChangPeace-Bold', sans-serif;
 }
 .overlay.menu-open,
 #nav_menu ul.menu-open{
  display: flex;
  transform: scale(1);
  opacity: 1;
 }

}