/* quiz.css -- small overrides on top of Bootstrap. Add your brand tweaks here. */

.equation-display {
  letter-spacing: 2px;
}

.equation-display .blank {
  color: #999;
  border-bottom: 2px dashed #bbb;
  margin: 0 4px;
  display: inline-block;
  min-width: 34px;
}

/* Placeholder styling so empty/unconfigured ad slots don't leave visible
   gaps during development. Remove once real AdSense units are live -- the
   real <ins class="adsbygoogle"> units style themselves. */
.ad-slot:empty {
  display: none;
}