Bootstrap 5 Contact Form with Floating Labels

<section class="wdw-stage">
  <div class="container" style="max-width: 960px;">
    <div class="wdw-card overflow-hidden" id="contact-wrap">
      <div class="row g-0">
        <aside class="col-lg-5 wdw-aurora p-4 p-md-5 d-flex flex-column justify-content-between gap-4">
          <div>
            <span class="wdw-eyebrow text-white-50">Get in touch</span>
            <h2 class="wdw-heading h3 mb-2 text-white">Contact us</h2>
            <p class="mb-0 text-white-50">Tell us about your project for a custom quote. We reply within one business day.</p>
          </div>
          <ul class="list-unstyled d-grid gap-3 mb-0">
            <li class="d-flex align-items-center gap-3"><span class="wdw-icon flex-shrink-0" aria-hidden="true"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="5" width="18" height="14" rx="2"/><path d="m3 7 9 6 9-6"/></svg></span><span><span class="d-block small text-white-50">Email</span>[email protected]</span></li>
            <li class="d-flex align-items-center gap-3"><span class="wdw-icon flex-shrink-0" aria-hidden="true"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><path d="M5 4h4l2 5-2.5 1.5a11 11 0 0 0 5 5L15 13l5 2v4a2 2 0 0 1-2 2A16 16 0 0 1 3 6a2 2 0 0 1 2-2z"/></svg></span><span><span class="d-block small text-white-50">Phone</span>+1 (555) 013-2040</span></li>
            <li class="d-flex align-items-center gap-3"><span class="wdw-icon flex-shrink-0" aria-hidden="true"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="9"/><path d="M12 7v5l3 2"/></svg></span><span><span class="d-block small text-white-50">Hours</span>Mon to Fri, 9:00 to 17:30</span></li>
          </ul>
        </aside>
        <form class="col-lg-7 p-4 p-md-5" id="contact" novalidate>
          <fieldset class="mb-4">
            <legend class="form-label fw-semibold fs-6">What is this about?</legend>
            <div class="d-flex flex-wrap gap-2">
              <input type="radio" class="btn-check" name="topic" id="tp-1" value="Project" checked><label class="btn btn-outline-primary rounded-pill" for="tp-1">Project</label>
              <input type="radio" class="btn-check" name="topic" id="tp-2" value="Support"><label class="btn btn-outline-primary rounded-pill" for="tp-2">Support</label>
              <input type="radio" class="btn-check" name="topic" id="tp-3" value="Other"><label class="btn btn-outline-primary rounded-pill" for="tp-3">Other</label>
            </div>
          </fieldset>
          <div class="row g-3">
            <div class="col-sm-6">
              <div class="form-floating"><input type="text" class="form-control" id="ct-name" name="name" placeholder="Your name" autocomplete="name" aria-describedby="ct-name-err" required><label for="ct-name">Your name</label><div class="invalid-feedback" id="ct-name-err" role="alert">Required.</div></div>
            </div>
            <div class="col-sm-6">
              <div class="form-floating"><input type="email" class="form-control" id="ct-email" name="email" placeholder="Email" autocomplete="email" aria-describedby="ct-email-err" required><label for="ct-email">Email address</label><div class="invalid-feedback" id="ct-email-err" role="alert">Valid email needed.</div></div>
            </div>
            <div class="col-sm-6">
              <div class="form-floating"><input type="tel" class="form-control" id="ct-phone" name="phone" placeholder="Phone" autocomplete="tel"><label for="ct-phone">Phone (optional)</label></div>
            </div>
            <div class="col-sm-6">
              <div class="form-floating"><input type="url" class="form-control" id="ct-site" name="website" placeholder="Website" autocomplete="url" aria-describedby="ct-site-err"><label for="ct-site">Website (optional)</label><div class="invalid-feedback" id="ct-site-err" role="alert">Enter a full URL, like https://example.com.</div></div>
            </div>
            <div class="col-12">
              <div class="form-floating"><textarea class="form-control ct-msg" id="ct-msg" name="message" placeholder="Message" aria-describedby="ct-msg-err" required></textarea><label for="ct-msg">Your message</label><div class="invalid-feedback" id="ct-msg-err" role="alert">Please write a short message.</div></div>
            </div>
            <div class="col-12"><button class="btn btn-primary rounded-pill w-100" type="submit">Send message</button></div>
          </div>
          <div class="alert alert-success d-none mt-3 mb-0" id="ct-ok" role="status">Thanks, your message is on its way.</div>
        </form>
      </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 */
#contact-wrap .form-control { border: 1.5px solid var(--bs-secondary-color); }
#contact-wrap .form-control:focus { border-color: var(--bs-primary); }
#contact-wrap .form-control.is-invalid { border-color: var(--bs-form-invalid-border-color); }
#contact-wrap .ct-msg { height: 140px; min-height: 140px; }
#contact-wrap .wdw-icon { flex: none; background: rgba(255, 255, 255, .14); color: #fff; }
#contact-wrap .btn-check:focus-visible + .btn { box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }

(function () {
  function initContact() {
    var form = document.getElementById('contact');
    if (!form) return;
    var ok = document.getElementById('ct-ok');
    form.addEventListener('submit', function (e) {
      e.preventDefault();
      var first = null;
      form.querySelectorAll('input:not([type=radio]), textarea').forEach(function (i) {
        var bad = !i.checkValidity();
        i.classList.toggle('is-invalid', bad);
        if (bad && !first) first = i;
      });
      ok.classList.toggle('d-none', !!first);
      if (first) { first.focus(); return; }
      form.reset();
    });
  }
  initContact();
})();