.menu_btn{
    top: 60px !important;
}

.menu_btn span {
    background: #000 !important;
}
.menu_btn.open span{
    background-color: #fff !important;
}

.header_list li a {
    color: #000 !important;
}

.global_nav{
    position: inherit;
}

@media screen and (max-width: 500px) {
.menu_btn{
    top: 50px !important;
}
}