/* Home-page banner.
   UELer_icon_wide.png is a transparent PNG whose wordmark is mostly black, so it
   is illegible against the slate (dark) scheme.  The transparency is kept as-is
   in light mode; only in dark mode does the logo get a light panel behind it. */
[data-md-color-scheme="slate"] .ueler-banner img {
  background: #ffffff;
  border-radius: 12px;
  padding: 14px;
}