.m-nav-flex-y,
.m-nav-flex-x,
.m-nav-flex-xy,
.m-nav-flex-space {
  display: flex;
  flex-wrap: wrap;
}
.m-nav-flex-xy,
.m-nav-flex-y {
  align-items: center;
}
.m-nav-flex-xy,
.m-nav-flex-x {
  justify-content: center;
}
.m-nav-flex-space {
  justify-content: space-between;
}
.m-nav-flex-nowrap {
  flex-wrap: nowrap;
}