Bootstrap 5 Responsive Footer with Newsletter

<section class="wdw-stage">
  <div class="container" style="max-width:1100px">
  <footer class="wdw-card overflow-hidden">
    <div class="p-4 p-md-5">
      <div class="row g-4 g-lg-5">
        <div class="col-12 col-lg-5">
          <div class="footer-brand wdw-aurora rounded-4 p-4 h-100">
            <a href="#" class="d-inline-flex align-items-center gap-2 text-white text-decoration-none fw-bold fs-5 mb-3">
              <span class="wdw-icon footer-logo"><svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="m12 3 9 5-9 5-9-5z"/><path d="m3 13 9 5 9-5"/></svg></span>
              Northwind
            </a>
            <p class="mb-4 opacity-75">Tools and guides that help small teams ship better websites, faster.</p>
            <form class="footer-news d-flex gap-2" novalidate>
              <label for="footerEmail" class="visually-hidden">Email address</label>
              <input id="footerEmail" type="email" class="form-control" placeholder="[email protected]" required aria-describedby="footerStatus">
              <button class="btn btn-primary rounded-pill px-3" type="submit">Subscribe</button>
            </form>
            <p id="footerStatus" class="small mt-2 mb-0" role="status" aria-live="polite"></p>
          </div>
        </div>
        <div class="col-6 col-md-4 col-lg-2">
          <h2 class="h6 fw-bold mb-3">Product</h2>
          <ul class="list-unstyled d-grid gap-2 mb-0">
            <li><a class="footer-link" href="#">Features</a></li>
            <li><a class="footer-link" href="#">Pricing</a></li>
            <li><a class="footer-link" href="#">Integrations</a></li>
            <li><a class="footer-link" href="#">Changelog</a></li>
          </ul>
        </div>
        <div class="col-6 col-md-4 col-lg-2">
          <h2 class="h6 fw-bold mb-3">Company</h2>
          <ul class="list-unstyled d-grid gap-2 mb-0">
            <li><a class="footer-link" href="#">About</a></li>
            <li><a class="footer-link" href="#">Careers</a></li>
            <li><a class="footer-link" href="#">Blog</a></li>
            <li><a class="footer-link" href="#">Contact</a></li>
          </ul>
        </div>
        <div class="col-12 col-md-4 col-lg-2">
          <h2 class="h6 fw-bold mb-3">Resources</h2>
          <ul class="list-unstyled d-grid gap-2 mb-0">
            <li><a class="footer-link" href="#">Docs</a></li>
            <li><a class="footer-link" href="#">Help centre</a></li>
            <li><a class="footer-link" href="#">Status</a></li>
            <li><a class="footer-link" href="#">Videos</a></li>
          </ul>
        </div>
      </div>
      <hr class="my-4">
      <div class="d-flex flex-column flex-md-row justify-content-between align-items-center gap-3">
        <small class="wdw-muted">© 2026 Northwind Inc. All rights reserved.</small>
        <ul class="list-unstyled d-flex gap-2 mb-0">
          <li><a class="footer-social" href="#" aria-label="X"><svg width="16" height="16" viewBox="0 0 24 24" fill="currentColor" aria-hidden="true"><path d="M18.2 2.3h3.3l-7.2 8.3 8.5 11.2h-6.7l-5.2-6.8-6 6.8H1.6l7.7-8.8L1.2 2.3H8l4.7 6.2zm-1.2 17.5h1.8L7 4.2H5z"/></svg></a></li>
          <li><a class="footer-social" href="#" aria-label="Instagram"><svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" aria-hidden="true"><rect x="3" y="3" width="18" height="18" rx="5"/><circle cx="12" cy="12" r="4"/><circle cx="17.5" cy="6.5" r="1" fill="currentColor"/></svg></a></li>
          <li><a class="footer-social" href="#" aria-label="GitHub"><svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M15 22v-4a4.8 4.8 0 0 0-1-3.5c3 0 6-2 6-5.5.1-1.300-.4-2.600-1.300-3.600.3-1.100.3-2.400-.1-3.500 0 0-1.100-.3-3.600 1.400a12 12 0 0 0-6.200 0C6.200 2.200 5.100 2.500 5.100 2.500c-.4 1.100-.4 2.400-.1 3.500A5.400 5.400 0 0 0 3.700 9.500c0 3.500 3 5.500 6 5.500-.4.400-.7 1-.8 1.800V22"/><path d="M9 18c-4.500 2-5-2-7-2"/></svg></a></li>
          <li><a class="footer-social" href="#" aria-label="Email"><svg width="16" height="16" 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 7 9 6 9-6"/></svg></a></li>
        </ul>
      </div>
    </div>
  </footer>
  </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 */
.footer-logo { width: 2.25rem; height: 2.25rem; border-radius: .65rem; background: rgba(255,255,255,.16); color: #fff; }
.footer-link { color: var(--bs-secondary-color); text-decoration: none; transition: color .15s, padding-left .15s; }
.footer-link:hover, .footer-link:focus-visible { color: var(--bs-primary); padding-left: .25rem; }
.footer-social { width: 2.5rem; height: 2.5rem; display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; color: var(--bs-secondary-color); background: var(--bs-tertiary-bg); transition: background .15s, color .15s; }
.footer-social:hover, .footer-social:focus-visible { background: var(--bs-primary); color: var(--bs-white); }
[data-bs-theme="dark"] .footer-social:hover, [data-bs-theme="dark"] .footer-social:focus-visible { color: var(--bs-black); }
.footer-news input { flex: 1 1 auto; min-width: 0; }
.footer-news .btn { flex: none; white-space: nowrap; }
.footer-news input.is-invalid { border-color: #fda4af; }
#footerStatus { min-height: 1.25rem; color: #fff; }
#footerStatus.is-error { color: #fecdd3; }
@media (max-width: 575.98px) { .footer-news { flex-direction: column; } }

(function initFooterNewsletter() {
  var form = document.querySelector('.footer-news');
  if (!form) return;
  var input = form.querySelector('input');
  var btn = form.querySelector('button');
  var status = document.getElementById('footerStatus');
  form.addEventListener('submit', function (e) {
    e.preventDefault();
    if (!input.value.trim() || !input.checkValidity()) {
      input.classList.add('is-invalid');
      input.setAttribute('aria-invalid', 'true');
      status.classList.add('is-error');
      status.textContent = 'Please enter a valid email address.';
      input.reportValidity();
      input.focus();
      return;
    }
    input.classList.remove('is-invalid');
    input.removeAttribute('aria-invalid');
    status.classList.remove('is-error');
    status.textContent = 'Thanks! Check your inbox to confirm.';
    btn.textContent = 'Subscribed';
    btn.disabled = true;
    input.value = '';
  });
  input.addEventListener('input', function () {
    input.classList.remove('is-invalid');
    input.removeAttribute('aria-invalid');
  });
})();