.learning-share-theme-toggle {
  position: fixed;
  z-index: 10000;
  top: 16px;
  right: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 9px 14px;
  border: 1px solid #bdc8d8;
  border-radius: 999px;
  background: #fff;
  color: #182230;
  box-shadow: 0 4px 16px rgb(24 34 53 / 16%);
  font: 600 1rem/1.2 system-ui, -apple-system, "Segoe UI", sans-serif;
  cursor: pointer;
}

.learning-share-theme-toggle:hover {
  box-shadow: 0 6px 20px rgb(24 34 53 / 22%);
}

.learning-share-theme-toggle:focus-visible {
  outline: 3px solid #5b8def;
  outline-offset: 3px;
}

html[data-theme="dark"] {
  color-scheme: dark;
  background: #141a24;
}

/* Invert page colors to give the site's varied standalone pages a consistent dark palette. */
html[data-theme="dark"] body {
  filter: invert(.92) hue-rotate(180deg);
}

html[data-theme="dark"] :is(img, video, canvas, .learning-share-theme-toggle) {
  filter: invert(.92) hue-rotate(180deg);
}

@media (max-width: 520px) {
  .learning-share-theme-toggle {
    top: 10px;
    right: 10px;
  }
}