.navigation-clean .navbar-collapse, .navigation-clean .navbar-form {
  border-top-color: #ddd;
}

.navigation-clean.navbar .navbar-nav > li > a {
  padding-left: 18px;
  padding-right: 18px;
}

.navbar .navbar-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

.navbar .navbar-collapse {
  text-align: center;
}

.navbar-nav {
  float: none;
}