Bootstrap 5 Custom Checkbox and Radio Cards

<section class="wdw-stage">
  <div class="container" style="max-width:760px">
    <div class="wdw-card p-4 p-md-5">
      <form>
        <div class="row g-4 g-md-5">
          <div class="col-md-6"><fieldset>
          <legend class="wdw-heading h5 mb-1">Notifications</legend>
          <p class="small text-body-secondary mb-3">Choose what lands in your inbox.</p>
          <div class="d-grid gap-3">
          <div class="position-relative">
            <input type="checkbox" class="visually-hidden mi-input" id="miOpt1" checked>
            <label class="mi-row" for="miOpt1"><span class="wdw-icon"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M3 6h18v12H3z"/><path d="m3 7 9 6 9-6"/></svg></span><span class="flex-grow-1"><span class="d-block fw-semibold text-body-emphasis">Email updates</span><span class="d-block small text-body-secondary">Product news and release notes</span></span><span class="mi-mark mi-check" aria-hidden="true"><svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3.5" stroke-linecap="round" stroke-linejoin="round"><path d="m5 12.5 4.5 4.5L19 7.500"/></svg></span></label>
          </div>
          <div class="position-relative">
            <input type="checkbox" class="visually-hidden mi-input" id="miOpt2">
            <label class="mi-row" for="miOpt2"><span class="wdw-icon"><svg width="22" height="22" 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="16" rx="2"/><path d="M3 10h18M8 3v4M16 3v4"/></svg></span><span class="flex-grow-1"><span class="d-block fw-semibold text-body-emphasis">Weekly digest</span><span class="d-block small text-body-secondary">One summary every Monday morning</span></span><span class="mi-mark mi-check" aria-hidden="true"><svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3.5" stroke-linecap="round" stroke-linejoin="round"><path d="m5 12.5 4.5 4.5L19 7.500"/></svg></span></label>
          </div>
          </div>
        </fieldset></div>
          <div class="col-md-6"><fieldset>
          <legend class="wdw-heading h5 mb-1">Make my profile public?</legend>
          <p class="small text-body-secondary mb-3">You can change this at any time.</p>
          <div class="d-grid gap-3">
          <div class="position-relative">
            <input type="radio" class="visually-hidden mi-input" name="miPublic" id="miYes" checked>
            <label class="mi-row" for="miYes"><span class="wdw-icon"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><circle cx="12" cy="12" r="9"/><path d="M3 12h18M12 3a14 14 0 0 1 0 18 14 14 0 0 1 0-18z"/></svg></span><span class="flex-grow-1"><span class="d-block fw-semibold text-body-emphasis">Yes, public</span><span class="d-block small text-body-secondary">Anyone can find and view your profile</span></span><span class="mi-mark mi-radio" aria-hidden="true"><svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3.5" stroke-linecap="round" stroke-linejoin="round"><path d="m5 12.5 4.5 4.5L19 7.500"/></svg></span></label>
          </div>
          <div class="position-relative">
            <input type="radio" class="visually-hidden mi-input" name="miPublic" id="miNo">
            <label class="mi-row" for="miNo"><span class="wdw-icon"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><rect x="4" y="11" width="16" height="10" rx="2"/><path d="M8 11V7a4 4 0 0 1 8 0v4"/></svg></span><span class="flex-grow-1"><span class="d-block fw-semibold text-body-emphasis">No, private</span><span class="d-block small text-body-secondary">Only people you approve can see it</span></span><span class="mi-mark mi-radio" aria-hidden="true"><svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3.5" stroke-linecap="round" stroke-linejoin="round"><path d="m5 12.5 4.5 4.5L19 7.500"/></svg></span></label>
          </div>
          </div>
        </fieldset></div>
        </div>
      </form>
    </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 */
:root, [data-bs-theme="light"] { --mi-on: #fff; }
[data-bs-theme="dark"] { --mi-on: #0f1117; }
.mi-row { display: flex; align-items: center; gap: 1rem; min-height: 72px; padding: .875rem 1rem; border: 1px solid var(--bs-border-color); border-radius: 1rem; background: var(--bs-body-bg); cursor: pointer; transition: border-color .2s, background-color .2s, box-shadow .2s; }
.mi-row:hover { border-color: var(--bs-primary-border-subtle); background: var(--bs-tertiary-bg); }
.mi-mark { width: 24px; height: 24px; flex: none; display: inline-flex; align-items: center; justify-content: center; border: 2px solid var(--bs-border-color); color: var(--mi-on); transition: background-color .2s, border-color .2s; }
.mi-mark svg { opacity: 0; transform: scale(.5); transition: opacity .2s, transform .2s cubic-bezier(.3,1.6,.5,1); }
.mi-radio { border-radius: 50%; }
.mi-check { border-radius: .4rem; }
.mi-input:checked + .mi-row { border-color: var(--bs-primary); background: var(--bs-primary-bg-subtle); box-shadow: 0 0 0 3px rgba(var(--bs-primary-rgb), .25); }
.mi-input:checked + .mi-row .mi-mark { background: var(--bs-primary); border-color: var(--bs-primary); }
.mi-input:checked + .mi-row .mi-mark svg { opacity: 1; transform: scale(1); }
.mi-input:checked + .mi-row .wdw-icon { background: var(--bs-primary); color: var(--mi-on); }
.mi-input:focus-visible + .mi-row { outline: 3px solid var(--bs-primary); outline-offset: 2px; }
@media (forced-colors: active) {
  .mi-input:checked + .mi-row { outline: 3px solid Highlight; }
  .mi-input:checked + .mi-row .mi-mark { forced-color-adjust: none; background: Highlight; border-color: Highlight; color: HighlightText; }
}