MediaWiki:Common.css

Note: After publishing, you may have to bypass your browser's cache to see the changes.

• Firefox / Safari: Hold Shift while clicking Reload, or press either Ctrl-F5 or Ctrl-R (⌘-R on a Mac)
• Google Chrome: Press Ctrl-Shift-R (⌘-Shift-R on a Mac)
• Edge: Hold Ctrl while clicking Refresh, or press Ctrl-F5.

/* CSS placed here will be applied to all skins */
/* Remove default underline on h3/h4 */
.mw-parser-output h3, .mw-parser-output h4 {
  border-bottom: none !important;
  box-shadow: none !important;
  position: relative;
  padding-bottom: 6px; /* matches the 4x line, tweak as needed */
}

/* Custom pixel border for h3/h4 using border-image */
.mw-parser-output h3,
.mw-parser-output h4 {
  border-bottom: 20px solid transparent; /* 20px = 4x your original 5px height */
  border-image-source: url(https://wiki.hoodedhorse.com/images/mbhh_hisc/5/50/Border_line.png?20250801202922); /* update to your path */
  border-image-slice: 0 40 0 40 fill;    /* 40px = 4x 10px (cap), fill for repeat in center */
  border-image-width: 0 0 20px 0;        /* only bottom border gets image */
  border-image-repeat: stretch round;    /* caps stretched, middle repeated */
  border-image-outset: 0;
}