.mm-menu {
  display: none; }

.open_nav_mobile {
  text-align: center; }

.open_nav_mobile {
  background: #777;
  font-size: 16px;
  font-weight: bold;
  color: #fff;
  line-height: 40px;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  width: 100%;
  height: 40px;
  padding: 0 50px; }

.open_nav_mobile.fixed {
  position: fixed;
  top: 0;
  left: 0; }