Bootstrap 5 Navbar with Login Dropdown and Search

<div class="nb-page">
  <nav class="navbar navbar-expand-lg bg-body border-bottom sticky-top nb-nav">
    <div class="container">
      <a class="navbar-brand fw-bold d-flex align-items-center gap-2" href="#"><span class="nb-logo" aria-hidden="true"></span>Acme</a>
      <button class="navbar-toggler border-0" type="button" data-bs-toggle="collapse" data-bs-target="#nb-menu" aria-controls="nb-menu" aria-expanded="false" aria-label="Toggle navigation"><span class="navbar-toggler-icon"></span></button>
      <div class="collapse navbar-collapse" id="nb-menu">
        <ul class="navbar-nav me-auto mb-2 mb-lg-0">
          <li class="nav-item"><a class="nav-link active" aria-current="page" href="#">Home</a></li>
          <li class="nav-item"><a class="nav-link" href="#">Pricing</a></li>
          <li class="nav-item dropdown">
            <a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">Resources</a>
            <ul class="dropdown-menu border-0 shadow rounded-3 p-2">
              <li><a class="dropdown-item rounded-2" href="#">Documentation</a></li>
              <li><a class="dropdown-item rounded-2" href="#">Guides</a></li>
              <li><a class="dropdown-item rounded-2" href="#">Changelog</a></li>
              <li><hr class="dropdown-divider"></li>
              <li><a class="dropdown-item rounded-2" href="#">Community</a></li>
            </ul>
          </li>
        </ul>
        <form class="d-flex me-lg-3 mb-3 mb-lg-0" role="search" onsubmit="return false">
          <div class="input-group nb-search">
            <input class="form-control border-0 shadow-none bg-transparent ps-3" type="search" placeholder="Search" aria-label="Search">
            <button class="btn border-0 text-body-secondary px-3" type="submit" aria-label="Submit search"><svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" aria-hidden="true"><circle cx="11" cy="11" r="7"/><path d="M20 20l-3.5-3.5"/></svg></button>
          </div>
        </form>
        <div class="d-flex flex-column flex-lg-row align-items-stretch align-items-lg-center gap-3">
          <span class="text-body-secondary small d-none d-xl-inline">Have an account?</span>
          <div class="dropdown nb-login-wrap">
            <button class="btn btn-primary rounded-pill px-4 nb-login-btn" type="button" id="nb-login-toggle" data-bs-toggle="dropdown" data-bs-auto-close="outside" aria-expanded="false">Log in</button>
            <div class="dropdown-menu dropdown-menu-end nb-login border rounded-4 p-4" aria-labelledby="nb-login-toggle">
              <h2 class="h5 wdw-heading mb-3">Welcome back</h2>
              <div class="row g-2 mb-3">
                <div class="col-6"><button type="button" class="btn btn-outline-secondary text-body rounded-pill w-100 d-flex align-items-center justify-content-center gap-2"><svg width="18" height="18" viewBox="0 0 24 24" aria-hidden="true"><path fill="#4285F4" d="M23 12.3c0-.8-.1-1.500-.2-2.200H12v4.200h6.200a5.300 5.300 0 0 1-2.300 3.500v2.900h3.700c2.200-2 3.400-5 3.400-8.400z"/><path fill="#34A853" d="M12 24c3.100 0 5.700-1 7.600-2.800l-3.700-2.900c-1 .7-2.300 1.100-3.900 1.100-3 0-5.500-2-6.400-4.700H1.800v3A12 12 0 0 0 12 24z"/><path fill="#FBBC05" d="M5.600 14.700a7.200 7.200 0 0 1 0-4.600v-3H1.800a12 12 0 0 0 0 10.600z"/><path fill="#EA4335" d="M12 4.800c1.700 0 3.200.6 4.400 1.700l3.300-3.300A12 12 0 0 0 1.800 7.100l3.800 3C6.500 6.800 9 4.800 12 4.800z"/></svg>Google</button></div>
                <div class="col-6"><button type="button" class="btn btn-outline-secondary text-body rounded-pill w-100 d-flex align-items-center justify-content-center gap-2"><svg width="18" height="18" viewBox="0 0 24 24" fill="currentColor" aria-hidden="true"><path d="M12 .5a11.500 11.500 0 0 0-3.600 22.400c.6.100.8-.2.8-.6v-2c-3.200.7-3.900-1.500-3.900-1.500-.5-1.300-1.300-1.700-1.300-1.700-1-.7.1-.7.1-.7 1.200.1 1.800 1.200 1.800 1.200 1 1.800 2.700 1.300 3.400 1 .1-.8.4-1.300.7-1.600-2.600-.3-5.300-1.300-5.300-5.700 0-1.300.5-2.300 1.200-3.100-.1-.3-.5-1.500.1-3.100 0 0 1-.3 3.200 1.200a11 11 0 0 1 5.800 0c2.200-1.500 3.200-1.200 3.200-1.200.6 1.600.2 2.800.1 3.100.8.800 1.200 1.800 1.200 3.100 0 4.400-2.700 5.400-5.300 5.700.4.400.8 1.100.8 2.200v3.200c0 .4.200.7.800.6A11.500 11.500 0 0 0 12 .5z"/></svg>GitHub</button></div>
              </div>
              <div class="d-flex align-items-center gap-2 text-body-secondary small mb-3"><hr class="flex-grow-1 m-0"><span>or</span><hr class="flex-grow-1 m-0"></div>
              <form onsubmit="return false">
                <div class="form-floating mb-2"><input type="email" class="form-control" id="nb-email" placeholder="Email" autocomplete="email"><label for="nb-email">Email address</label></div>
                <div class="form-floating mb-2"><input type="password" class="form-control" id="nb-pass" placeholder="Password" autocomplete="current-password"><label for="nb-pass">Password</label></div>
                <div class="d-flex flex-wrap gap-2 justify-content-between align-items-center mb-3">
                  <div class="form-check"><input class="form-check-input" type="checkbox" id="nb-keep"><label class="form-check-label small" for="nb-keep">Keep me logged in</label></div>
                  <a href="#" class="small">Forgot password?</a>
                </div>
                <button type="submit" class="btn btn-primary w-100 rounded-pill">Sign in</button>
              </form>
              <p class="text-center text-body-secondary small mt-3 mb-0">New here? <a href="#" class="fw-semibold">Join us</a></p>
            </div>
          </div>
        </div>
      </div>
    </div>
  </nav>
  <header class="container nb-hero">
    <div class="row">
      <div class="col-lg-8">
        <span class="wdw-eyebrow mb-2">Navbar with sign-in</span>
        <h1 class="display-5 wdw-heading mb-3">A navigation bar that keeps sign-in one click away.</h1>
        <p class="lead text-body-secondary mb-5">Main links, a resources dropdown, search and a login panel with social buttons live together in one responsive bar.</p>
        <div class="row g-3">
          <div class="col-sm-4"><div class="wdw-card-sm p-3 h-100"><span class="wdw-icon mb-3"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><circle cx="11" cy="11" r="7"/><path d="M20 20l-3.5-3.5"/></svg></span><h2 class="h6 fw-bold mb-1">Built-in search</h2><p class="small text-body-secondary mb-0">A single pill field that collapses into the mobile menu.</p></div></div>
          <div class="col-sm-4"><div class="wdw-card-sm p-3 h-100"><span class="wdw-icon mb-3"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M4 6h16M4 12h16M4 18h10"/></svg></span><h2 class="h6 fw-bold mb-1">Resources menu</h2><p class="small text-body-secondary mb-0">A rounded dropdown for docs, guides and the changelog.</p></div></div>
          <div class="col-sm-4"><div class="wdw-card-sm p-3 h-100"><span class="wdw-icon mb-3"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><rect x="4" y="10" width="16" height="11" rx="3"/><path d="M8 10V7a4 4 0 0 1 8 0v3"/></svg></span><h2 class="h6 fw-bold mb-1">Quick sign-in</h2><p class="small text-body-secondary mb-0">Email or social login in a panel that never leaves the page.</p></div></div>
        </div>
      </div>
    </div>
  </header>
</div>

/* 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 */
.nb-logo{width:24px;height:24px;border-radius:8px;background:var(--bs-primary)}
.nb-login{min-width:340px}
.nb-page{background:var(--wdw-stage);min-height:100vh}
.nb-nav .nav-link,.nb-nav .btn{display:flex;align-items:center}
.nb-nav .btn{justify-content:center}
.nb-nav .nav-link.active{font-weight:600;color:var(--bs-emphasis-color)}
.nb-login a{text-decoration:none}
.nb-login a:hover{text-decoration:underline}
.nb-hero{padding-top:4rem;padding-bottom:4rem}
.nb-search{width:260px;max-width:100%;border:1px solid var(--bs-border-color);border-radius:50rem;overflow:hidden;background:var(--bs-body-bg);flex-wrap:nowrap}
.nb-search:focus-within{border-color:rgba(var(--bs-primary-rgb),.6);box-shadow:0 0 0 .2rem var(--bs-focus-ring-color)}
.nb-search .btn:hover{color:var(--bs-emphasis-color)}
.nb-nav .btn-primary{--bs-btn-active-bg:var(--bs-primary);--bs-btn-active-border-color:var(--bs-primary);--bs-btn-active-color:#fff}
[data-bs-theme="dark"] .nb-nav .btn-primary{--bs-btn-active-color:#0f1117}
.nb-nav .btn-primary.show,.nb-nav .btn-primary:focus-visible{box-shadow:0 0 0 .18rem rgba(var(--bs-primary-rgb),.28)}
.nb-nav .btn-primary.show{box-shadow:none}
.nb-login{box-shadow:var(--wdw-shadow)!important}
@media (max-width:575.98px){.nb-login{min-width:0}.nb-hero{padding-top:2.5rem}}
@media (max-width:991.98px){.nb-login{position:static!important;transform:none!important;inset:auto!important;width:100%;margin-top:.75rem!important}.nb-search{width:100%}.nb-login-wrap{width:100%}.nb-login-btn{width:100%}}

function initLoginPreview() {
  const toggle = document.getElementById('nb-login-toggle');
  if (!toggle) return;
  // Preview only: open the panel without moving focus, so keyboard users are never trapped in it.
  if (document.activeElement && document.activeElement !== document.body) return;
  if (window.innerWidth < 992) {
    // On phones, open the collapsed menu so search and login are visible.
    const menu = document.getElementById('nb-menu');
    if (menu) bootstrap.Collapse.getOrCreateInstance(menu, { toggle: false }).show();
    bootstrap.Dropdown.getOrCreateInstance(toggle).show();
    return;
  }
  // Open the login panel once so the component is visible at a glance.
  bootstrap.Dropdown.getOrCreateInstance(toggle).show();
}
initLoginPreview();