:root {
  --site-font-size: 12.5px;
}

body, h1, h2, h3, h4, h5, h6, p, pre, code, li, td, th, input, textarea, a {
  font-size: var(--site-font-size) !important;
}

@media only screen and (max-device-width: 500px) {
  * { font-size: var(--site-font-size) !important; }
}

li.font-size-controls {
  display: inline;
  margin-left: 10px;
}

.font-size-controls button {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: var(--site-font-size) !important;
  color: inherit;
  opacity: 0.5;
  padding: 0;
  margin: 0;
  line-height: 1;
}

.font-size-controls button:hover:not(:disabled) {
  opacity: 1;
}

.font-size-controls button:disabled {
  opacity: 0.2;
  cursor: default;
}