Bootstrap 5 Registration Form with Password Strength

<section class="wdw-stage">
  <div class="container" style="max-width: 880px;">
    <div class="wdw-card overflow-hidden">
      <div class="row g-0">
        <div class="col-md-5 wdw-aurora p-4 p-md-5 d-flex flex-column justify-content-between gap-4 reg-brand">
          <span class="reg-logo" aria-hidden="true">
            <svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 3l2.4 5.6L20 11l-5.6 2.4L12 19l-2.4-5.6L4 11l5.6-2.4z"/></svg>
          </span>
          <div>
            <h2 class="h3 fw-bold mb-2">Start your free workspace</h2>
            <p class="mb-0 opacity-75">Join 12,000 teams planning, shipping and celebrating together. No credit card needed.</p>
          </div>
        </div>
        <div class="col-md-7 p-4 p-md-5">
          <span class="wdw-eyebrow">New account</span>
          <h1 class="h3 wdw-heading mt-1 mb-4">Create your account</h1>
          <form class="d-grid gap-3" id="regForm" novalidate>
            <div class="form-floating">
              <input type="text" class="form-control" id="regName" placeholder="Full name" autocomplete="name" required>
              <label for="regName">Full name</label>
              <div class="invalid-feedback">Please enter your name.</div>
            </div>
            <div class="form-floating">
              <input type="email" class="form-control" id="regEmail" placeholder="Email address" autocomplete="email" required>
              <label for="regEmail">Email address</label>
              <div class="invalid-feedback">Enter a valid email address.</div>
            </div>
            <div class="row g-3">
              <div class="col-sm-6">
                <div class="form-floating position-relative">
                  <input type="password" class="form-control pe-5" id="regPass" placeholder="Password" autocomplete="new-password" minlength="8" required>
                  <label for="regPass">Password</label>
                  <button type="button" class="btn btn-link reg-eye text-body-secondary" data-reg-toggle aria-label="Show password" aria-pressed="false">
                    <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M1 12s4-7 11-7 11 7 11 7-4 7-11 7S1 12 1 12z"/><circle cx="12" cy="12" r="3"/></svg>
                  </button>
                  <div class="invalid-feedback">At least 8 characters.</div>
                </div>
              </div>
              <div class="col-sm-6">
                <div class="form-floating">
                  <input type="tel" class="form-control" id="regPhone" placeholder="Phone number" autocomplete="tel">
                  <label for="regPhone">Phone (optional)</label>
                </div>
              </div>
            </div>
            <div class="progress" style="height:6px" role="progressbar" aria-label="Password strength" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0" id="regMeter">
              <div class="progress-bar" style="width:0"></div>
            </div>
            <div class="form-check">
              <input class="form-check-input" type="checkbox" id="regTerms" required>
              <label class="form-check-label small wdw-muted" for="regTerms">I agree to the <a href="#">Terms</a> and <a href="#">Privacy Policy</a></label>
            </div>
            <button type="submit" class="btn btn-primary rounded-pill">Create account
              <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="M5 12h14M13 6l6 6-6 6"/></svg>
            </button>
            <p class="text-center small wdw-muted mb-0">Already registered? <a href="#" class="fw-semibold">Sign in</a></p>
          </form>
        </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 */
.reg-brand { min-height: 220px; }
.reg-logo { width: 2.75rem; height: 2.75rem; border-radius: .875rem; background: rgba(255,255,255,.16); display: inline-flex; align-items: center; justify-content: center; backdrop-filter: blur(6px); }
.reg-eye { position: absolute; top: 50%; right: .25rem; transform: translateY(-50%); min-height: 40px; width: 40px; padding: 0; z-index: 5; }
#regMeter .progress-bar { transition: width .3s, background-color .3s; }

function initRegistration() {
  const form = document.getElementById('regForm');
  if (!form) return;
  const pass = document.getElementById('regPass');
  const meter = document.getElementById('regMeter');
  const bar = meter.querySelector('.progress-bar');
  const toggle = form.querySelector('[data-reg-toggle]');
  toggle.addEventListener('click', () => {
    const show = pass.type === 'password';
    pass.type = show ? 'text' : 'password';
    toggle.setAttribute('aria-pressed', String(show));
    toggle.setAttribute('aria-label', show ? 'Hide password' : 'Show password');
  });
  pass.addEventListener('input', () => {
    const v = pass.value;
    let score = 0;
    if (v.length >= 8) score++;
    if (/[A-Z]/.test(v) && /[a-z]/.test(v)) score++;
    if (/\d/.test(v)) score++;
    if (/[^A-Za-z0-9]/.test(v)) score++;
    const colors = ['', 'bg-danger', 'bg-warning', 'bg-success', 'bg-success'];
    bar.className = 'progress-bar ' + colors[score];
    bar.style.width = (score * 25) + '%';
    meter.setAttribute('aria-valuenow', score * 25);
  });
  form.addEventListener('submit', (e) => {
    e.preventDefault();
    form.classList.add('was-validated');
  });
}
initRegistration();