MediaWiki:Common.css

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/* CSS placed here will be applied to all skins */
/* Remove default border line on headings */
.mw-parser-output h2,
.mw-parser-output h3,
.mw-parser-output h4 {
  border-bottom: none !important;
  box-shadow: none !important;
  position: relative;
  padding-bottom: 5px;
}

/* Add pixel-art border under headings using background shorthand */
.mw-parser-output h2::after,
.mw-parser-output h3::after,
.mw-parser-output h4::after {
  content: "";
  display: block;
  height: 5px;
  width: 100%;
  margin-top: 4px;

  background:
    no-repeat left center / auto 5px url(/images/mbhh_hisc/0/0c/Border_line_left.png?20250801175416),
    repeat-x center center / auto 5px url(/images/mbhh_hisc/2/2b/Border_line_middle.png?20250801175434),
    no-repeat right center / auto 5px url(/images/mbhh_hisc/b/b3/Border_line_right.png?20250801175454);
}