Accessible Disclosure Pattern

<!-- Block disclosure (closed by default) -->
<details class="disclosure">
  <summary>
    Show shipping details
    <svg class="disclosure-icon" aria-hidden="true">
      <!-- Chevron icon that rotates when open -->
    </svg>
  </summary>
  <div class="disclosure-content">
    <p>Hidden content revealed on expand.</p>
  </div>
</details>

<!-- Open by default: add the open attribute -->
<details class="disclosure" open>
  <summary>Open by default</summary>
  <div class="disclosure-content">
    <p>Visible when the page loads.</p>
  </div>
</details>

<!-- Inline "read more" inside a paragraph -->
<p>
  A short summary sentence.
  <details class="inline-disclosure">
    <summary>Read more</summary>
    <span> The rest of the text continues here
      with more detail.</span>
  </details>
</p>

.disclosure {
  border: 1px solid #d1d5db;
  border-radius: 0.75rem;
  overflow: hidden;
}

/* Remove the default disclosure triangle */
.disclosure summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  /* SC 2.5.8: minimum 24x24 target */
  min-height: 2.75rem;
}

.disclosure summary::-webkit-details-marker {
  display: none;
}

.disclosure summary::marker {
  content: "";
}

.disclosure summary:hover {
  background: #f8f9fa;
}

/* Focus style: SC 2.4.13 compliant */
.disclosure summary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Chevron rotates when section is open */
.disclosure-icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
  transition: transform 200ms ease;
}

.disclosure details[open] .disclosure-icon,
details.disclosure[open] .disclosure-icon {
  transform: rotate(180deg);
}

.disclosure-content {
  padding: 0 1.5rem 1.5rem;
}

/* Inline "read more" variant */
.inline-disclosure {
  display: inline;
}

.inline-disclosure summary {
  display: inline;
  cursor: pointer;
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.inline-disclosure summary::-webkit-details-marker {
  display: none;
}

.inline-disclosure[open] summary {
  display: none;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .disclosure-icon {
    transition: none;
  }
}