materio-base-d7/sites/all/modules/contrib/admin/admin_menu/admin_menu-rtl.css

#admin-menu {
  text-align: right;
}
#admin-menu .dropdown .admin-menu-users a {
  background-position: 10% center;
  padding-left: 22px;
  padding-right: 0;
}
#admin-menu .dropdown .admin-menu-action,
#admin-menu .dropdown .admin-menu-search {
  float: left;
}
#admin-menu .dropdown .admin-menu-action a {
  border-left: none;
  border-right: 1px solid #323232;
}

/* All lists */
#admin-menu a {
  text-align: right;
}
#admin-menu .dropdown a {
  border-left: 1px solid #323232;
  border-right: 0;
}
#admin-menu .dropdown .admin-menu-tab a {
  border-left: 1px solid #52565e;
  border-right: 0;
}
#admin-menu .dropdown li li a {
  border-left: 0;
}

/* All list items */
#admin-menu .dropdown li {
  float: right;
}
#admin-menu .dropdown li li {
}

/* Second-level lists */
#admin-menu .dropdown li ul {
  left: auto;
  right: auto;
}

/* Third-and-above-level lists */
#admin-menu .dropdown li li.expandable ul {
  margin-left: 0 !important;
  margin-right: 160px !important;
}

/* Lists nested under hovered list items */
#admin-menu .dropdown li.admin-menu-action:hover ul {
  left: 0 !important;
  right: auto;
}

/* Second-and-more-level hovering */
#admin-menu .dropdown li li.expandable {
  background-image: url(images/arrow-rtl.png);
  background-position: 5px 6px;
}