Bootstrap 5 Accordion with Hover Effect

<section class="wdw-stage">
  <div class="container" style="max-width: 1040px;">
    <div class="row g-4 align-items-stretch">
      <div class="col-lg-5">
        <div class="wdw-aurora rounded-4 p-4 p-md-5 h-100 d-flex flex-column justify-content-between gap-4">
          <div>
            <span class="wdw-eyebrow text-white-50">FAQ</span>
            <h1 class="h2 wdw-heading mt-1 mb-2 text-white">Questions, answered</h1>
            <p class="mb-0 text-white-50">Hover a row to preview it, click to keep it open.</p>
          </div>
          <div class="bg-white bg-opacity-10 rounded-4 p-4">
            <p class="fw-bold mb-1">Still stuck?</p>
            <p class="small text-white-50 mb-3">Our support team replies within a few hours.</p>
            <a href="#" class="btn btn-light rounded-pill px-4 fw-semibold">Contact support</a>
          </div>
        </div>
      </div>
      <div class="col-lg-7">
        <div class="accordion hover-acc d-grid gap-3" id="hoverAcc">
          <div class="accordion-item wdw-card-sm overflow-hidden">
            <h2 class="accordion-header">
              <button class="accordion-button" type="button" data-bs-toggle="collapse" data-bs-target="#ha1" aria-expanded="true" aria-controls="ha1">
                <span class="wdw-icon me-3"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><rect x="3" y="5" width="18" height="14" rx="2"/><path d="M3 10h18"/></svg></span>
                How does billing work?
              </button>
            </h2>
            <div id="ha1" class="accordion-collapse collapse show" data-bs-parent="#hoverAcc">
              <div class="accordion-body wdw-muted">You are billed monthly or yearly, and can switch plans at any time. Unused time is credited automatically to your next invoice.</div>
            </div>
          </div>
          <div class="accordion-item wdw-card-sm overflow-hidden">
            <h2 class="accordion-header">
              <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#ha2" aria-expanded="false" aria-controls="ha2">
                <span class="wdw-icon me-3"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M17 21v-2a4 4 0 0 0-4-4H7a4 4 0 0 0-4 4v2"/><circle cx="10" cy="7" r="4"/><path d="M21 21v-2a4 4 0 0 0-3-3.9M16 3.1a4 4 0 0 1 0 7.8"/></svg></span>
                Can I invite my team?
              </button>
            </h2>
            <div id="ha2" class="accordion-collapse collapse" data-bs-parent="#hoverAcc">
              <div class="accordion-body wdw-muted">Yes. Add unlimited teammates, assign roles, and control who can view or edit each project from the settings page.</div>
            </div>
          </div>
          <div class="accordion-item wdw-card-sm overflow-hidden">
            <h2 class="accordion-header">
              <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#ha3" aria-expanded="false" aria-controls="ha3">
                <span class="wdw-icon me-3"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z"/></svg></span>
                Is my data safe?
              </button>
            </h2>
            <div id="ha3" class="accordion-collapse collapse" data-bs-parent="#hoverAcc">
              <div class="accordion-body wdw-muted">Everything is encrypted in transit and at rest, backed up daily, and you can export or delete your data whenever you like.</div>
            </div>
          </div>
          <div class="accordion-item wdw-card-sm overflow-hidden">
            <h2 class="accordion-header">
              <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#ha4" aria-expanded="false" aria-controls="ha4">
                <span class="wdw-icon me-3"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M3 12a9 9 0 1 0 3-6.7L3 8"/><path d="M3 3v5h5"/></svg></span>
                Can I get a refund?
              </button>
            </h2>
            <div id="ha4" class="accordion-collapse collapse" data-bs-parent="#hoverAcc">
              <div class="accordion-body wdw-muted">Cancel within 30 days of purchase and we will refund you in full, no questions asked.</div>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</section>

/* Web Designer Wall library style — shared base for every Bootstrap 5 snippet.
   Indigo accent, Plus Jakarta Sans, soft cards, pill buttons. Works in light and dark. */
@import url("https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap");

:root,
[data-bs-theme="light"] {
  --wdw-font: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --bs-body-font-family: var(--wdw-font);
  --bs-primary: #4f46e5;
  --bs-primary-rgb: 79, 70, 229;
  --bs-primary-text-emphasis: #3730a3;
  --bs-primary-bg-subtle: #eef2ff;
  --bs-primary-border-subtle: #c7d2fe;
  --bs-link-color: #4f46e5;
  --bs-link-color-rgb: 79, 70, 229;
  --bs-link-hover-color: #4338ca;
  --bs-link-hover-color-rgb: 67, 56, 202;
  --bs-focus-ring-color: rgba(79, 70, 229, 0.25);
  --bs-border-radius: 0.75rem;
  --bs-border-radius-lg: 1rem;
  --bs-border-radius-xl: 1.25rem;
  --wdw-radius-card: 1.25rem;
  --wdw-shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 16px 40px -16px rgba(16, 24, 40, 0.22);
  --wdw-shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06), 0 4px 12px -4px rgba(16, 24, 40, 0.12);
  --wdw-stage: #f5f6fb;
}

[data-bs-theme="dark"] {
  --bs-primary: #818cf8;
  --bs-primary-rgb: 129, 140, 248;
  --bs-primary-text-emphasis: #c7d2fe;
  --bs-primary-bg-subtle: rgba(129, 140, 248, 0.14);
  --bs-primary-border-subtle: rgba(129, 140, 248, 0.35);
  --bs-link-color: #a5b4fc;
  --bs-link-color-rgb: 165, 180, 252;
  --bs-link-hover-color: #c7d2fe;
  --bs-link-hover-color-rgb: 199, 210, 254;
  --bs-focus-ring-color: rgba(129, 140, 248, 0.35);
  --wdw-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 16px 40px -16px rgba(0, 0, 0, 0.7);
  --wdw-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 12px -4px rgba(0, 0, 0, 0.5);
  --wdw-stage: #0f1117;
}

body { font-family: var(--wdw-font); -webkit-font-smoothing: antialiased; }

/* Bootstrap compiles its blue into these components; point them at the accent. */
.btn-primary {
  --bs-btn-bg: var(--bs-primary); --bs-btn-border-color: var(--bs-primary);
  --bs-btn-hover-bg: #4338ca; --bs-btn-hover-border-color: #4338ca;
  --bs-btn-active-bg: #3730a3; --bs-btn-active-border-color: #3730a3;
  --bs-btn-disabled-bg: var(--bs-primary); --bs-btn-disabled-border-color: var(--bs-primary);
  --bs-btn-focus-shadow-rgb: var(--bs-primary-rgb);
}
[data-bs-theme="dark"] .btn-primary { --bs-btn-color: #0f1117; --bs-btn-hover-bg: #a5b4fc; --bs-btn-hover-border-color: #a5b4fc; --bs-btn-hover-color: #0f1117; --bs-btn-active-color: #0f1117; }
.btn-outline-primary {
  --bs-btn-color: var(--bs-primary); --bs-btn-border-color: var(--bs-primary);
  --bs-btn-hover-bg: var(--bs-primary); --bs-btn-hover-border-color: var(--bs-primary);
  --bs-btn-active-bg: var(--bs-primary); --bs-btn-active-border-color: var(--bs-primary);
  --bs-btn-focus-shadow-rgb: var(--bs-primary-rgb);
}
.btn { --bs-btn-font-weight: 600; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: .5rem; }
.btn-sm { min-height: 36px; }
.form-control, .form-select { min-height: 44px; border-radius: .75rem; }
.form-control:focus, .form-select:focus, .form-check-input:focus { border-color: rgba(var(--bs-primary-rgb), .6); box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }
.form-check-input:checked { background-color: var(--bs-primary); border-color: var(--bs-primary); }
.nav-pills { --bs-nav-pills-link-active-bg: var(--bs-primary); }
.nav { --bs-nav-link-color: var(--bs-secondary-color); --bs-nav-link-hover-color: var(--bs-emphasis-color); }
.pagination { --bs-pagination-active-bg: var(--bs-primary); --bs-pagination-active-border-color: var(--bs-primary); --bs-pagination-color: var(--bs-body-color); --bs-pagination-focus-box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }
.progress, .progress-stacked { --bs-progress-bar-bg: var(--bs-primary); }
.list-group { --bs-list-group-active-bg: var(--bs-primary); --bs-list-group-active-border-color: var(--bs-primary); }
.dropdown-menu { --bs-dropdown-link-active-bg: var(--bs-primary); border-radius: .875rem; box-shadow: var(--wdw-shadow-sm); }
.accordion { --bs-accordion-active-bg: var(--bs-primary-bg-subtle); --bs-accordion-active-color: var(--bs-primary-text-emphasis); --bs-accordion-btn-focus-box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }
.badge { font-weight: 600; }

/* Library building blocks — use these instead of re-inventing them per snippet. */
.wdw-stage { min-height: 100vh; display: flex; align-items: center; background: var(--wdw-stage); padding-block: 3rem; }
.wdw-card { background: var(--bs-body-bg); border: 1px solid var(--bs-border-color-translucent); border-radius: var(--wdw-radius-card); box-shadow: var(--wdw-shadow); }
.wdw-card-sm { background: var(--bs-body-bg); border: 1px solid var(--bs-border-color-translucent); border-radius: 1rem; box-shadow: var(--wdw-shadow-sm); }
.wdw-aurora { position: relative; color: #fff; background: radial-gradient(60% 55% at 100% 0, #818cf8 0, transparent 70%), radial-gradient(65% 60% at 0 100%, #ec4899 0, transparent 65%), #1e1b4b; }
.wdw-eyebrow { display: inline-block; font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--bs-primary); }
.wdw-heading { font-weight: 800; letter-spacing: -.02em; color: var(--bs-emphasis-color); }
.wdw-muted { color: var(--bs-secondary-color); }
.wdw-icon { width: 2.75rem; height: 2.75rem; flex: none; display: inline-flex; align-items: center; justify-content: center; border-radius: .875rem; background: var(--bs-primary-bg-subtle); color: var(--bs-primary); }

/* Component */
.hover-acc .accordion-item { --bs-accordion-border-width: 0; --bs-accordion-btn-padding-x: 1.25rem; --bs-accordion-btn-padding-y: 1.1rem; --bs-accordion-body-padding-x: 1.25rem; --bs-accordion-body-padding-y: 0; transition: transform .25s, box-shadow .25s, background-color .25s; }
.hover-acc .accordion-item:hover { transform: translateY(-2px); box-shadow: var(--wdw-shadow); }
.hover-acc .accordion-item:has(.show), .hover-acc .accordion-item:has(.collapsing) { background: var(--bs-primary-bg-subtle); }
.hover-acc .accordion-body { padding-left: 4.1rem; padding-bottom: 1.25rem; }
.hover-acc .accordion-button { background: transparent; box-shadow: none; font-weight: 700; color: var(--bs-emphasis-color); }
.hover-acc .accordion-button:not(.collapsed) { background: transparent; color: var(--bs-primary-text-emphasis); }
.hover-acc .accordion-button::after { transition: transform .25s; }
.hover-acc .accordion-item:hover .accordion-button::after, .hover-acc .accordion-button:not(.collapsed)::after { filter: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%236366f1' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m2 5 6 6 6-6'/%3E%3C/svg%3E"); }
.hover-acc .accordion-item .wdw-icon { transition: background-color .25s, color .25s; }
.hover-acc .accordion-item:hover .wdw-icon, .hover-acc .accordion-button:not(.collapsed) .wdw-icon { background: var(--bs-primary); color: #fff; }
.hover-acc .accordion-button:focus-visible { box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }
@media (prefers-reduced-motion: reduce) { .hover-acc .accordion-item, .hover-acc .accordion-button::after { transition: none; } }

function initHoverAccordion() {
  const acc = document.getElementById('hoverAcc');
  if (!acc || !window.matchMedia('(hover: hover)').matches) return;
  acc.querySelectorAll('.accordion-item').forEach((item) => {
    const panel = item.querySelector('.accordion-collapse');
    const btn = item.querySelector('.accordion-button');
    let pinned = false;
    let timer = 0;
    btn.addEventListener('click', () => { pinned = !panel.classList.contains('show') && !panel.classList.contains('collapsing'); });
    item.addEventListener('mouseenter', () => {
      clearTimeout(timer);
      timer = setTimeout(() => {
        if (!panel.classList.contains('show')) bootstrap.Collapse.getOrCreateInstance(panel, { parent: acc }).show();
      }, 140);
    });
    item.addEventListener('mouseleave', () => {
      clearTimeout(timer);
      if (item.contains(document.activeElement) && document.activeElement.matches(':focus-visible')) return;
      if (!pinned && panel.classList.contains('show')) bootstrap.Collapse.getOrCreateInstance(panel, { toggle: false }).hide();
    });
  });
}
initHoverAccordion();