#heading-dropdown {
  background: #f3f3f3;
  position: absolute;
  display: block;
  z-index: 100;
  text-align: center;
}

.heading-dropdown-h2 {
  font-size: 0.9rem;
}
.heading-dropdown-h3 {
  font-size: 0.8rem;
}
.heading-dropdown-h4 {
  font-size: 0.7rem;
}
.heading-dropdown-h5 {
  font-size: 0.6rem;
}
.heading-dropdown-h6 {
  font-size: 0.5rem;
}

.grav-mdeditor-navbar ul #heading-dropdown a {
  padding: 0 0.9rem;
}
.grav-mdeditor-navbar ul #heading-dropdown a:hover {
  background: #fbfbfb;
}