/* Theme tweaks layered on top of Bootstrap Flatly. */

:root {
  --brand-accent: #2c3e50; /* Flatly navbar background */
  --brand-accent-hover: #1f2d3a;
}

a {
  color: var(--brand-accent);
  text-decoration: none;
}

a:hover,
a:focus {
  color: var(--brand-accent-hover);
  text-decoration: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--brand-accent);
}

/* Pull the code-fold toggle into the left margin with a subtle pointer */
details.code-fold > summary {
  list-style: none;
  position: relative;
  margin-left: -1.5rem;
  padding-left: 1.5rem;
  cursor: pointer;
  color: transparent; /* keep text for accessibility but hide visually */
  line-height: 1.4;
}

details.code-fold > summary::-webkit-details-marker {
  display: none;
}

details.code-fold > summary::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--brand-accent);
  font-size: 0.85rem;
}

details.code-fold[open] > summary::before {
  content: "▾";
}