Bootstrap 5 Welcome Email Template

<section class="wdw-stage mail-stage">
  <div class="container" style="max-width:640px">
    <article class="wdw-card overflow-hidden mail" data-bs-theme="light">
      <div class="mail-hero wdw-aurora text-center px-4 pt-4 pb-4">
        <div class="d-inline-flex align-items-center gap-2 fw-bold mb-3">
          <span class="mail-logo" aria-hidden="true"><svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.25" stroke-linecap="round" stroke-linejoin="round"><path d="M4 12l5 5L20 6"/></svg></span>
          Northwind
        </div>
        <svg class="d-block mx-auto mb-2" width="72" height="72" viewBox="0 0 72 72" fill="none" aria-hidden="true"><circle cx="36" cy="36" r="30" fill="rgba(255,255,255,.14)"/><rect x="17" y="24" width="38" height="26" rx="5" fill="#fff"/><path d="M19 28l17 12 17-12" stroke="#4f46e5" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/><circle cx="53" cy="22" r="7" fill="#ec4899"/><path d="M50 22l2 2 4-4" stroke="#fff" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>
        <h1 class="h2 fw-bold mb-2">Welcome aboard, Nick</h1>
        <p class="mb-3 mx-auto opacity-75" style="max-width:420px">Your account is ready. Sign in to finish setting up your workspace and invite your team.</p>
        <a href="#" class="btn btn-light rounded-pill px-4 fw-bold">Access your account</a>
      </div>
      <div class="mail-body px-4 py-4 px-md-5">
        <span class="wdw-eyebrow">Account active</span>
        <h2 class="h5 wdw-heading mt-1 mb-2">Three steps for your first week</h2>
        <ol class="list-unstyled row g-3 my-0">
          <li class="col-md-4 d-flex gap-2 flex-md-column"><span class="wdw-icon mail-step fw-bold">1</span><div><strong class="d-block">Complete your profile</strong><span class="small wdw-muted">Add a photo and your role.</span></div></li>
          <li class="col-md-4 d-flex gap-2 flex-md-column"><span class="wdw-icon mail-step fw-bold">2</span><div><strong class="d-block">Connect your tools</strong><span class="small wdw-muted">Link calendar, chat and storage.</span></div></li>
          <li class="col-md-4 d-flex gap-2 flex-md-column"><span class="wdw-icon mail-step fw-bold">3</span><div><strong class="d-block">Invite your team</strong><span class="small wdw-muted">Collaborate from day one.</span></div></li>
        </ol>
        <p class="small wdw-muted mt-3 mb-0">Need a hand? Just reply to this email and a real person will get back to you.</p>
      </div>
      <footer class="mail-footer text-center small px-4 py-3">
        <p class="mb-1">You received this email because you created an account at Northwind.</p>
        <p class="mb-0"><a href="#" class="link-body-emphasis fw-semibold">Unsubscribe</a> · <a href="#" class="link-body-emphasis fw-semibold">Privacy</a> · <a href="#" class="link-body-emphasis fw-semibold">Help centre</a></p>
      </footer>
    </article>
    <p class="text-center small wdw-muted mt-3 mb-0">Layout preview. Production email needs inlined, table-based markup.</p>
  </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 */
.mail-stage { padding-block: 1.25rem; }
.mail-logo { width: 32px; height: 32px; border-radius: 10px; display: inline-flex; align-items: center; justify-content: center; background: rgba(255,255,255,.18); }
.mail-hero .btn-light { --bs-btn-bg: #fff; --bs-btn-hover-bg: #eef2ff; --bs-btn-color: #4338ca; --bs-btn-hover-color: #3730a3; --bs-btn-active-color: #3730a3; --bs-btn-border-color: #fff; --bs-btn-hover-border-color: #eef2ff; }
.mail-step { width: 2.25rem; height: 2.25rem; border-radius: 50%; font-size: .9rem; flex: none; }
.mail-footer { background: #eceef5; border-top: 1px solid #d5d8e6; color: #475467; }
.mail-footer a { text-decoration: underline; }
.mail .wdw-muted { color: #475467; }
.mail-body { background: var(--bs-body-bg); }
.mail { color: var(--bs-body-color); }