Bootstrap 5 Contact Modal with Floating Label Form

<section class="wdw-stage">
  <div class="container" style="max-width:980px">
    <div class="wdw-card overflow-hidden">
      <div class="row g-0">
        <div class="col-md-6 p-4 p-md-5 d-flex flex-column justify-content-center">
          <span class="wdw-eyebrow">Contact</span>
          <h1 class="display-6 wdw-heading mt-1 mb-3">Let’s talk about your project</h1>
          <p class="wdw-muted mb-4">Tell us a little about what you need and we’ll reply within one business day.</p>
          <div>
            <button type="button" class="btn btn-primary btn-lg rounded-pill px-4" data-bs-toggle="modal" data-bs-target="#cfModal">Contact details</button>
          </div>
        </div>
        <div class="col-md-6 wdw-aurora p-4 p-md-5 d-flex flex-column justify-content-center gap-4">
          <div class="d-flex gap-3 align-items-center"><span class="cf-ico"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><rect x="3" y="5" width="18" height="14" rx="3"/><path d="m4 7 8 6 8-6"/></svg></span><div><div class="small opacity-75">Email</div><div class="fw-semibold">[email protected]</div></div></div>
          <div class="d-flex gap-3 align-items-center"><span class="cf-ico"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><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><div><div class="small opacity-75">Phone</div><div class="fw-semibold">+1 (555) 014-2290</div></div></div>
          <div class="d-flex gap-3 align-items-center"><span class="cf-ico"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M12 21s7-6.2 7-11a7 7 0 1 0-14 0c0 4.800 7 11 7 11z"/><circle cx="12" cy="10" r="2.500"/></svg></span><div><div class="small opacity-75">Studio</div><div class="fw-semibold">48 Harbour Street, Portland</div></div></div>
        </div>
      </div>
    </div>
  </div>
  <div class="modal fade" id="cfModal" tabindex="-1" aria-labelledby="cfTitle" aria-hidden="true">
    <div class="modal-dialog modal-dialog-centered">
      <div class="modal-content border-0 shadow-lg" style="border-radius:1.25rem">
        <div class="modal-header border-0 pb-0 px-4 pt-4">
          <div><h2 class="modal-title h4 wdw-heading" id="cfTitle">Send us a message</h2><p class="small wdw-muted mb-0">We usually reply within a day.</p></div>
          <button type="button" class="btn-close align-self-start" data-bs-dismiss="modal" aria-label="Close"></button>
        </div>
        <form id="cfForm" novalidate>
          <div class="modal-body p-4">
            <div class="form-floating mb-3"><input type="text" class="form-control" id="cfName" placeholder="Name" autocomplete="name" required><label for="cfName">Full name</label><div class="invalid-feedback">Please tell us your name.</div></div>
            <div class="form-floating mb-3"><input type="email" class="form-control" id="cfEmail" placeholder="Email" autocomplete="email" required><label for="cfEmail">Email address</label><div class="invalid-feedback">Enter a valid email.</div></div>
            <div class="form-floating"><textarea class="form-control" id="cfMsg" placeholder="Message" style="height:130px" required></textarea><label for="cfMsg">How can we help?</label><div class="invalid-feedback">Write a short message.</div></div>
          </div>
          <div class="modal-footer border-0 px-4 pb-4 pt-0">
            <button type="button" class="btn btn-outline-secondary rounded-pill" data-bs-dismiss="modal">Cancel</button>
            <button type="submit" class="btn btn-primary rounded-pill px-4">Send message</button>
          </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 */
.cf-ico { width: 2.75rem; height: 2.75rem; flex: none; display: inline-flex; align-items: center; justify-content: center; border-radius: .875rem; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.22); }
#cfModal .form-control { min-height: 58px; }
#cfModal textarea.form-control { height: 130px; min-height: 130px; }

(function () {
  function initContactModal() {
    var form = document.getElementById('cfForm');
    var modalEl = document.getElementById('cfModal');
    if (!form || !modalEl) return;
    form.addEventListener('submit', function (e) {
      e.preventDefault();
      form.querySelectorAll('.form-control').forEach(function (i) { i.classList.toggle('is-invalid', !i.checkValidity()); });
      if (!form.checkValidity()) return;
      bootstrap.Modal.getInstance(modalEl).hide();
      form.reset();
    });
    modalEl.addEventListener('hidden.bs.modal', function () {
      form.querySelectorAll('.is-invalid').forEach(function (i) { i.classList.remove('is-invalid'); });
    });
  }
  initContactModal();
})();