menu.css

@charset "utf-8";
/* CSS Document */

.menu{
	box-shadow: 0 1px 3px 0 rgba(0, 0, 0, .12), 0 1px 2px 0 rgba(0, 0, 0, .24);
	background-color: #738e30;
	font-family: 'Cormorant Infant', serif;
	padding-left: 100px;
}

.menu__list{
  text-align: center;
  padding-left: 0;
  margin-top: 0;
  margin-bottom: 0;
  list-style: none;  
}

.menu__link{
	display: block;
	will-change: color;
 	transition: color .25s ease-out;  
	font-weight: 700;
	color: #414141;
	text-decoration: none;
	text-transform: uppercase;
	padding-top: 10px;
	padding-bottom: 10px;
}

@media (min-width: 601px){

  .menu__list{
    display: flex;  
  }

  .menu__group{
    flex-grow: 1;
  }

  .menu__link{
    position: relative;
    overflow: hidden;
  }

  .menu__link:before, .menu__link:after{
    content: "";
    width: 0;
    height: 3px;
    background-color: rgb(186, 184, 143);
    will-change: width;
    transition: width .05s ease-out;
    position: absolute;
    bottom: 0;
	color: #414141;
  }

  .menu__link:before{
    left: 50%;
    transform: translateX(-50%); 
  }

  .menu__link:after{
    right: 50%;
    transform: translateX(50%); 
  }

  .menu__link:hover:before, .menu__link:hover:after{
    width: 100%;
    transition-duration: .15s;
  }
  
}

.menu:hover .menu__link:not(:hover){
  color: #414141;
}