.nav_col{
     color: rgba(39, 129, 38, 0.998);
     background-color: rgba(0, 255, 255, 0);
    
}
.nav_col ul{
    height: auto;
}
nav {
     background-color: rgba(0, 0, 0, 0.744);
}    
button span{
     background-image: url(../photo/nav-symb.svg);
}
.nav_col li{
     padding-left: 20px;
}
@media screen and (max-width: 768px) {
     .nav_col ul {
          height: 115px;
     }

}