.box-blue {
  background-color: #dff3f1;
  border: 2px solid #7fcac3;
  border-radius: 8px;
  padding: 1.2em 1em 0.5em 1em;
  margin: 1.5em 0;
  position: relative;
  box-shadow: 0 2px 8px rgba(25, 118, 210, 0.15);
}

.box-hl {
  background-color: #fff8c4;
  border: 2px solid #e6d85c;
  border-radius: 8px;
  padding: 1.2em 1em 0.5em 1em;
  margin: 1.5em 0;
  position: relative;
  box-shadow: 0 2px 8px rgba(25, 118, 210, 0.15);
}

.callout-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--bs-border-color, #ccc);
  border-radius: 999px;
  background: var(--bs-body-bg, #fff);
  color: var(--bs-body-color, #222);
  font-size: 0.95rem;
  line-height: 1.2;
  cursor: pointer;
  transition: all 0.2s ease;
}

.callout-toggle-btn:hover {
  background: rgba(0, 0, 0, 0.05);
}

.callout-toggle-btn::before {
  content: "▸";
  transition: transform 0.2s ease;
}

.callout-toggle-btn.is-expanded::before {
  content: "▾";
}

.callout-toggle-btn.is-expanded {
  background: rgba(0, 0, 0, 0.08);
}