hugo-theme-termlite/assets/css/099_site_header.css

/*************************
 # COMPONENT: SITE HEADER
 *************************/

.site-header__container {
  .site-header__title {
    font-family: var(--font-family-heading);
  }

  .site-header__nav {
    font-size: smaller;
    font-weight: normal;
  }
}

.site-header__container,
.site-footer__container {
  /* Center the content and ensure a minimum margin. The calculation in the
   * second argument does what `auto` would do if it could be used in max(). */
  margin-inline: max(var(--space-s), 50% - var(--content-width) / 2);
  max-width: var(--content-width);
}