body {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  padding-top: 1rem !important;
}

main {
  flex: 1;
}

/* Enable Bootstrap nav sub-menus  */
.dropdown-menu li {
  position: relative;
}
.dropdown-menu .dropdown-submenu {
  display: none;
  position: absolute;
  left: 100%;
  top: -7px;
}
.dropdown-menu .dropdown-submenu-left {
  right: 100%;
  left: auto;
}
.dropdown-menu > li:hover > .dropdown-submenu {
  display: block;
}