Bootstrap 5 Product Page with Buy Now Button

<section class="wdw-stage">
  <div class="container" style="max-width: 1080px">
    <div class="wdw-card overflow-hidden">
      <div class="row g-0">
        <div class="col-lg-6 pp-media bg-body-tertiary position-relative">
          <img src="https://images.unsplash.com/photo-1485965120184-e220f721d03e?auto=format&fit=crop&w=1000&q=80" alt="City bike leaning against a wall" class="w-100 h-100 object-fit-cover">
          <span class="badge text-bg-dark rounded-pill position-absolute top-0 start-0 m-3 px-3 py-2">New season</span>
        </div>
        <div class="col-lg-6 p-4 p-md-5">
          <span class="wdw-eyebrow">City bikes</span>
          <h1 class="wdw-heading h2 mt-1 mb-2">Tyre City Cycle 21</h1>
          <div class="d-flex align-items-center gap-2 mb-3">
            <span class="pp-stars" role="img" aria-label="Rated 4.5 out of 5">
              <svg width="16" height="16" viewBox="0 0 24 24" fill="currentColor" aria-hidden="true"><path d="M12 2l3 6.9 7.5.7-5.7 5 1.7 7.3L12 17.8 5.5 21.9l1.7-7.3-5.7-5 7.5-.7z"/></svg><svg width="16" height="16" viewBox="0 0 24 24" fill="currentColor" aria-hidden="true"><path d="M12 2l3 6.9 7.5.7-5.7 5 1.7 7.3L12 17.8 5.5 21.9l1.7-7.3-5.7-5 7.5-.7z"/></svg><svg width="16" height="16" viewBox="0 0 24 24" fill="currentColor" aria-hidden="true"><path d="M12 2l3 6.9 7.5.7-5.7 5 1.7 7.3L12 17.8 5.5 21.9l1.7-7.3-5.7-5 7.5-.7z"/></svg><svg width="16" height="16" viewBox="0 0 24 24" fill="currentColor" aria-hidden="true"><path d="M12 2l3 6.9 7.5.7-5.7 5 1.7 7.3L12 17.8 5.5 21.9l1.7-7.3-5.7-5 7.5-.7z"/></svg><svg width="16" height="16" viewBox="0 0 24 24" fill="currentColor" aria-hidden="true" class="opacity-25"><path d="M12 2l3 6.9 7.5.7-5.7 5 1.7 7.3L12 17.8 5.5 21.9l1.7-7.3-5.7-5 7.5-.7z"/></svg>
            </span>
            <span class="small wdw-muted">4.5 · 250 reviews</span>
          </div>
          <div class="d-flex align-items-baseline gap-2 mb-4">
            <span class="fs-2 fw-bold text-body-emphasis">$289</span>
            <s class="wdw-muted">$349</s>
            <span class="badge bg-success-subtle text-success-emphasis rounded-pill">Save 17%</span>
          </div>

          <ul class="nav nav-pills gap-1 mb-3" role="tablist">
            <li class="nav-item" role="presentation"><button class="nav-link active rounded-pill" id="pp-tab-d" data-bs-toggle="pill" data-bs-target="#pp-d" type="button" role="tab" aria-controls="pp-d" aria-selected="true">Details</button></li>
            <li class="nav-item" role="presentation"><button class="nav-link rounded-pill" id="pp-tab-s" data-bs-toggle="pill" data-bs-target="#pp-s" type="button" role="tab" aria-controls="pp-s" aria-selected="false">Shipping</button></li>
            <li class="nav-item" role="presentation"><button class="nav-link rounded-pill" id="pp-tab-r" data-bs-toggle="pill" data-bs-target="#pp-r" type="button" role="tab" aria-controls="pp-r" aria-selected="false">Reviews</button></li>
          </ul>
          <div class="tab-content mb-4 pp-tabs">
            <div class="tab-pane fade show active" id="pp-d" role="tabpanel" aria-labelledby="pp-tab-d" tabindex="0">
              <ul class="list-unstyled d-grid gap-2 mb-0">
                <li class="d-flex gap-2 align-items-center"><svg class="pp-ck" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M5 12.5l4.5 4.5L19 7.5"/></svg> 100% quality checked</li>
                <li class="d-flex gap-2 align-items-center"><svg class="pp-ck" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M5 12.5l4.5 4.5L19 7.5"/></svg> 12 months warranty</li>
                <li class="d-flex gap-2 align-items-center"><svg class="pp-ck" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M5 12.5l4.5 4.5L19 7.5"/></svg> Easy returns within 30 days</li>
                <li class="d-flex gap-2 align-items-center"><svg class="pp-ck" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M5 12.5l4.5 4.5L19 7.5"/></svg> Lightweight steel frame</li>
              </ul>
            </div>
            <div class="tab-pane fade" id="pp-s" role="tabpanel" aria-labelledby="pp-tab-s" tabindex="0">
              <ul class="list-unstyled d-grid gap-2 mb-0">
                <li class="d-flex gap-2 align-items-center"><svg class="pp-ck" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M5 12.5l4.5 4.5L19 7.5"/></svg> Free shipping on every order</li>
                <li class="d-flex gap-2 align-items-center"><svg class="pp-ck" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M5 12.5l4.5 4.5L19 7.5"/></svg> Normal delivery in 4 to 5 days</li>
                <li class="d-flex gap-2 align-items-center"><svg class="pp-ck" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M5 12.5l4.5 4.5L19 7.5"/></svg> Express delivery in 2 to 3 days</li>
                <li class="d-flex gap-2 align-items-center"><svg class="pp-ck" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M5 12.5l4.5 4.5L19 7.5"/></svg> Cash on delivery available</li>
              </ul>
            </div>
            <div class="tab-pane fade" id="pp-r" role="tabpanel" aria-labelledby="pp-tab-r" tabindex="0">
              <figure class="mb-0">
                <blockquote class="mb-1">Solid build and great on rough trails. Assembly took twenty minutes.</blockquote>
                <figcaption class="small wdw-muted">Ravi K., verified buyer</figcaption>
              </figure>
            </div>
          </div>

          <div class="d-flex flex-wrap gap-2">
            <div class="input-group pp-qty" role="group" aria-label="Quantity">
              <button class="btn btn-outline-secondary px-3" type="button" data-qty="-1" aria-label="Decrease quantity">−</button>
              <input type="text" class="form-control text-center px-0" value="1" id="ppQty" inputmode="numeric" aria-label="Quantity" readonly>
              <button class="btn btn-outline-secondary px-3" type="button" data-qty="1" aria-label="Increase quantity">+</button>
            </div>
            <button type="button" class="btn btn-outline-primary rounded-pill px-4 flex-fill">Add to cart</button>
            <button type="button" class="btn btn-primary rounded-pill px-4 flex-fill">Buy now</button>
          </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 */
.pp-media { min-height: 320px; }
.pp-media img { position: absolute; inset: 0; }
.pp-ck { color: var(--bs-success); flex: none; }
.pp-stars { color: #f59e0b; display: inline-flex; gap: 2px; }
.pp-qty { width: 9.5rem; flex: none; }
.pp-qty .btn { border-color: var(--bs-border-color); }
.pp-qty .form-control { border-radius: 0; }
.pp-qty .btn:first-child { border-radius: 2rem 0 0 2rem; }
.pp-qty .btn:last-child { border-radius: 0 2rem 2rem 0; }
.pp-tabs { min-height: 7.5rem; }
.nav-pills .nav-link { font-weight: 600; font-size: .875rem; }

(function () {
  function initQuantity() {
    var input = document.getElementById('ppQty');
    if (!input) return;
    document.querySelectorAll('[data-qty]').forEach(function (btn) {
      btn.addEventListener('click', function () {
        var n = parseInt(input.value, 10) + parseInt(btn.dataset.qty, 10);
        input.value = Math.min(10, Math.max(1, n));
      });
    });
  }
  initQuantity();
})();