#nav_menu {
          list-style: none;
          margin: 0;
          padding: 0;
        }
        #nav_menu:after {
          content: "";
          display: table;
          clear: both;
        }
        .left-item {float: left;}
        .right-item {float: right;}
        .navbar-logo {
          position: absolute;
          left: 50%;
          top: 50%;
          transform: translate(-50%,-50%);
        }
        #nav_menu a {
          text-decoration: none;
          display: block;
          line-height: 40px;
          padding: 0 20px;
          font-size: 18px;
          letter-spacing: 2px;
          /*font-family: 'Arimo', sans-serif;*/
          font-weight: bold;
          color: #474747f6;
          transition: .3s linear;
        }
        
        #nav_menu a:hover {background: rgba(131, 196, 218, 0.5);} /* rgba(96, 96, 86, 0.3)*/
		/*
        @media (max-width: 830px) {
        #nav_menu {

          text-align: center;
        }

        #nav_menu li {
          float: none;
          display: inline-block;
        }
        #nav_menu a {
          line-height: normal;
          padding: 20px 15px;
          font-size: 16px;
        }
        }
*/
        
        @media (max-width: 630px) {
        #nav_menu li {display: block;}
        }