h1, h2, h3, h4, h5, h6 {
  color: var(--md-primary-fg-color) !important;
}


/* Style horizontal rules as short dividers */
.md-typeset hr {
  width: 40%;              /* make it shorter */
  margin: 1.5em auto;      /* center it */
  border: none;            /* remove default */
  border-top: 3px solid var(--md-primary-fg-color); /* match theme color */
  border-radius: 2px;
}