Back to CSS Mega Menus Noir Editorial CSS + JS
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HTML 
<nav class="mm-noi" aria-label="Noir Editorial main menu">
  <ul class="nav-bar" role="menubar">

    <!-- WOMEN -->
    <li class="nav-item" role="none">
      <button type="button" class="nav-trigger" role="menuitem" aria-haspopup="true" aria-expanded="false">Women</button>
      <div class="mega cols-3-img" role="menu">
        <div class="mega-img">
          <img src="https://images.unsplash.com/photo-1539109136881-3be0616acf4b?w=600&q=80" alt="" loading="lazy" />
          <span class="mega-img-overlay" aria-hidden="true"></span>
          <div class="mega-img-label">
            <span class="eyebrow">SS 2026 Collection</span>
            <span class="headline">The Quiet<br />Luxury Edit</span>
          </div>
        </div>
        <div class="mega-col">
          <div class="mega-col-title">Ready to Wear</div>
          <ul class="mega-links">
            <li><a href="#" role="menuitem">Jackets &amp; Coats</a></li>
            <li><a href="#" role="menuitem">Dresses <span class="badge">New</span></a></li>
            <li><a href="#" role="menuitem">Trousers</a></li>
            <li><a href="#" role="menuitem">Knitwear</a></li>
            <li><a href="#" role="menuitem">Blouses</a></li>
            <li><a href="#" role="menuitem">Skirts</a></li>
          </ul>
        </div>
        <div class="mega-col">
          <div class="mega-col-title">Accessories</div>
          <ul class="mega-links">
            <li><a href="#" role="menuitem">Handbags</a></li>
            <li><a href="#" role="menuitem">Shoes</a></li>
            <li><a href="#" role="menuitem">Belts</a></li>
            <li><a href="#" role="menuitem">Scarves</a></li>
            <li><a href="#" role="menuitem">Fine Jewellery</a></li>
          </ul>
          <div class="promo-block">
            <p class="promo-text">Complimentary monogramming on all leather goods this season.</p>
            <a href="#">Discover More</a>
          </div>
        </div>
        <div class="mega-footer-strip">
          <span>Free delivery on orders over &pound;500</span>
          <a href="#">View All Women</a>
        </div>
      </div>
    </li>

    <!-- MEN -->
    <li class="nav-item" role="none">
      <button type="button" class="nav-trigger" role="menuitem" aria-haspopup="true" aria-expanded="false">Men</button>
      <div class="mega cols-3-img" role="menu">
        <div class="mega-img">
          <img src="https://images.unsplash.com/photo-1490578474895-699cd4e2cf59?w=600&q=80" alt="" loading="lazy" />
          <span class="mega-img-overlay" aria-hidden="true"></span>
          <div class="mega-img-label">
            <span class="eyebrow">The Modern Gentleman</span>
            <span class="headline">Tailored<br />Restraint</span>
          </div>
        </div>
        <div class="mega-col">
          <div class="mega-col-title">Clothing</div>
          <ul class="mega-links">
            <li><a href="#" role="menuitem">Suits &amp; Tailoring</a></li>
            <li><a href="#" role="menuitem">Outerwear</a></li>
            <li><a href="#" role="menuitem">Shirts <span class="badge">New</span></a></li>
            <li><a href="#" role="menuitem">Trousers</a></li>
            <li><a href="#" role="menuitem">Knitwear</a></li>
            <li><a href="#" role="menuitem">Denim</a></li>
          </ul>
        </div>
        <div class="mega-col">
          <div class="mega-col-title">Accessories</div>
          <ul class="mega-links">
            <li><a href="#" role="menuitem">Shoes &amp; Boots</a></li>
            <li><a href="#" role="menuitem">Bags &amp; Pouches</a></li>
            <li><a href="#" role="menuitem">Wallets</a></li>
            <li><a href="#" role="menuitem">Ties &amp; Pocket Squares</a></li>
            <li><a href="#" role="menuitem">Fragrance</a></li>
          </ul>
          <div class="promo-block">
            <p class="promo-text">Bespoke tailoring appointments now available in all flagship stores.</p>
            <a href="#">Book a Session</a>
          </div>
        </div>
        <div class="mega-footer-strip">
          <span>New arrivals every Thursday</span>
          <a href="#">View All Men</a>
        </div>
      </div>
    </li>

    <!-- COLLECTIONS -->
    <li class="nav-item" role="none">
      <button type="button" class="nav-trigger" role="menuitem" aria-haspopup="true" aria-expanded="false">Collections</button>
      <div class="mega cols-editorial" role="menu">
        <div class="mega-img">
          <img src="https://images.unsplash.com/photo-1558769132-cb1aea458c5e?w=700&q=80" alt="" loading="lazy" />
          <span class="mega-img-overlay" aria-hidden="true"></span>
          <div class="mega-img-label">
            <span class="eyebrow">Limited Edition</span>
            <span class="headline">Archive<br />Reissues</span>
          </div>
        </div>
        <div class="mega-col">
          <div class="mega-col-title">By Season</div>
          <ul class="mega-links">
            <li><a href="#" role="menuitem">Spring/Summer 2026 <span class="badge">Live</span></a></li>
            <li><a href="#" role="menuitem">Resort 2026</a></li>
            <li><a href="#" role="menuitem">Autumn/Winter 2025</a></li>
            <li><a href="#" role="menuitem">Pre-Fall 2025</a></li>
            <li><a href="#" role="menuitem">Couture Archive</a></li>
          </ul>
        </div>
        <div class="mega-col">
          <div class="mega-col-title">Capsules</div>
          <ul class="mega-links">
            <li><a href="#" role="menuitem">Hotel Series</a></li>
            <li><a href="#" role="menuitem">The Night Edit</a></li>
            <li><a href="#" role="menuitem">Linen &amp; Light</a></li>
            <li><a href="#" role="menuitem">Collaboration</a></li>
          </ul>
          <div class="promo-block">
            <p class="promo-text">Members receive early access to all limited-release capsule drops.</p>
            <a href="#">Join The Circle</a>
          </div>
        </div>
        <div class="mega-footer-strip">
          <span>Exclusive to maison members</span>
          <a href="#">Explore All Collections</a>
        </div>
      </div>
    </li>

    <!-- MAISON -->
    <li class="nav-item" role="none">
      <button type="button" class="nav-trigger" role="menuitem" aria-haspopup="true" aria-expanded="false">Maison</button>
      <div class="simple-drop" role="menu">
        <a href="#" role="menuitem">Our History</a>
        <a href="#" role="menuitem">The Ateliers</a>
        <a href="#" role="menuitem">Craftsmanship</a>
        <a href="#" role="menuitem">Sustainability</a>
        <a href="#" role="menuitem">Press &amp; Editorial</a>
        <a href="#" role="menuitem">Careers</a>
      </div>
    </li>

    <!-- STORES -->
    <li class="nav-item" role="none">
      <button type="button" class="nav-trigger" role="menuitem" aria-haspopup="true" aria-expanded="false">Stores</button>
      <div class="simple-drop" role="menu">
        <a href="#" role="menuitem">Find a Store</a>
        <a href="#" role="menuitem">Paris Flagship</a>
        <a href="#" role="menuitem">New York</a>
        <a href="#" role="menuitem">London</a>
        <a href="#" role="menuitem">Tokyo</a>
        <a href="#" role="menuitem">Online Boutique</a>
      </div>
    </li>

  </ul>
</nav>
CSS 
/* ─── 01 Noir Editorial — dark luxury fashion mega menu ─────────────
   Imports Cormorant Garamond + Montserrat from Google Fonts. All
   styles are scoped under .mm-noi so global resets and body styles
   from the host page never leak in. */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;1,300;1,400&family=Montserrat:wght@200;300;400;500&display=swap');

.mm-noi {
  --mm-noi-ink: #0a0a0a;
  --mm-noi-bone: #f0ead8;
  --mm-noi-gold: #c9a84c;
  --mm-noi-gold-dim: #8a6f2e;
  --mm-noi-cream: #e8dfc8;
  --mm-noi-line: rgba(201, 168, 76, 0.2);

  position: relative;
  background: var(--mm-noi-ink);
  font-family: 'Montserrat', system-ui, sans-serif;
  width: 100%;
  min-height: 560px;
  padding: 0;
  overflow: hidden;
  box-sizing: border-box;
}

.mm-noi *,
.mm-noi *::before,
.mm-noi *::after { box-sizing: border-box; }

.mm-noi .nav-bar {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  background: var(--mm-noi-ink);
  border-bottom: 1px solid var(--mm-noi-line);
  position: relative;
  z-index: 2;
}

.mm-noi .nav-item { position: relative; list-style: none; }

.mm-noi .nav-trigger {
  display: block;
  padding: 22px 26px;
  color: var(--mm-noi-bone);
  font-family: 'Montserrat', system-ui, sans-serif;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  background: transparent;
  border: 0;
  cursor: pointer;
  user-select: none;
  transition: color 0.3s ease;
  position: relative;
}

.mm-noi .nav-trigger::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 80%;
  height: 1px;
  background: var(--mm-noi-gold);
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.mm-noi .nav-item:hover .nav-trigger,
.mm-noi .nav-item.mm-open .nav-trigger {
  color: var(--mm-noi-gold);
}
.mm-noi .nav-item:hover .nav-trigger::after,
.mm-noi .nav-item.mm-open .nav-trigger::after {
  transform: translateX(-50%) scaleX(1);
}

/* ── Mega Panel ── */
.mm-noi .mega {
  position: absolute;
  top: calc(100% + 1px);
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  width: min(900px, calc(100vw - 32px));
  max-width: calc(100% + 320px);
  background: var(--mm-noi-ink);
  border: 1px solid var(--mm-noi-line);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  display: grid;
  overflow: hidden;
  z-index: 5;
}

.mm-noi .mega.cols-3-img    { grid-template-columns: 2fr 1fr 1fr; }
.mm-noi .mega.cols-editorial { grid-template-columns: 1.8fr 1fr 1fr; }

.mm-noi .nav-item:hover .mega,
.mm-noi .nav-item.mm-open .mega {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}

/* ── Image Column ── */
.mm-noi .mega-img {
  position: relative;
  overflow: hidden;
  min-height: 360px;
}
.mm-noi .mega-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(30%) contrast(1.1);
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), filter 0.6s ease;
}
.mm-noi .nav-item:hover .mega-img img,
.mm-noi .nav-item.mm-open .mega-img img {
  transform: scale(1.04);
  filter: grayscale(0%) contrast(1.05);
}
.mm-noi .mega-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 10, 10, 0.8) 0%, rgba(10, 10, 10, 0.1) 50%, transparent 100%);
}
.mm-noi .mega-img-label {
  position: absolute;
  bottom: 24px;
  left: 24px;
  right: 24px;
}
.mm-noi .mega-img-label .eyebrow {
  display: block;
  font-family: 'Montserrat', system-ui, sans-serif;
  font-size: 8px;
  font-weight: 400;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--mm-noi-gold);
  margin-bottom: 6px;
}
.mm-noi .mega-img-label .headline {
  display: block;
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 28px;
  font-weight: 300;
  font-style: italic;
  color: var(--mm-noi-bone);
  line-height: 1.1;
}

/* ── Link Column ── */
.mm-noi .mega-col {
  padding: 36px 28px;
  border-left: 1px solid var(--mm-noi-line);
}
.mm-noi .mega-col-title {
  font-family: 'Montserrat', system-ui, sans-serif;
  font-size: 8px;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--mm-noi-gold);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--mm-noi-line);
}
.mm-noi .mega-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.mm-noi .mega-links li a {
  display: block;
  padding: 9px 0;
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 17px;
  font-weight: 300;
  color: var(--mm-noi-cream);
  text-decoration: none;
  letter-spacing: 0.03em;
  transition: color 0.25s ease, padding-left 0.3s ease;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  position: relative;
}
.mm-noi .mega-links li a::before {
  content: '\2014';
  position: absolute;
  left: -18px;
  opacity: 0;
  color: var(--mm-noi-gold);
  font-size: 12px;
  transition: opacity 0.25s ease, left 0.3s ease;
}
.mm-noi .mega-links li a:hover {
  color: var(--mm-noi-gold);
  padding-left: 14px;
}
.mm-noi .mega-links li a:hover::before {
  opacity: 1;
  left: 0;
}
.mm-noi .mega-links li a .badge {
  display: inline-block;
  font-family: 'Montserrat', system-ui, sans-serif;
  font-size: 7px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--mm-noi-ink);
  background: var(--mm-noi-gold);
  padding: 2px 6px;
  margin-left: 8px;
  vertical-align: middle;
}
.mm-noi .promo-block {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--mm-noi-line);
}
.mm-noi .promo-block .promo-text {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 13px;
  font-style: italic;
  font-weight: 300;
  color: rgba(240, 234, 216, 0.5);
  line-height: 1.6;
  margin: 0;
}
.mm-noi .promo-block a {
  display: inline-block;
  margin-top: 10px;
  font-family: 'Montserrat', system-ui, sans-serif;
  font-size: 8px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mm-noi-gold);
  text-decoration: none;
  border-bottom: 1px solid var(--mm-noi-gold-dim);
  padding-bottom: 2px;
  transition: border-color 0.3s, color 0.3s;
}
.mm-noi .promo-block a:hover {
  color: var(--mm-noi-bone);
  border-color: var(--mm-noi-bone);
}

/* ── Footer strip across whole panel ── */
.mm-noi .mega-footer-strip {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: rgba(201, 168, 76, 0.06);
  border-top: 1px solid var(--mm-noi-line);
}
.mm-noi .mega-footer-strip span {
  font-family: 'Montserrat', system-ui, sans-serif;
  font-size: 8px;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(240, 234, 216, 0.4);
}
.mm-noi .mega-footer-strip a {
  font-family: 'Montserrat', system-ui, sans-serif;
  font-size: 8px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mm-noi-gold);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: gap 0.3s;
}
.mm-noi .mega-footer-strip a::after { content: '\2192'; }
.mm-noi .mega-footer-strip a:hover { gap: 14px; }

/* ── Simple dropdown for Maison / Stores ── */
.mm-noi .simple-drop {
  position: absolute;
  top: calc(100% + 1px);
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  width: 240px;
  background: var(--mm-noi-ink);
  border: 1px solid var(--mm-noi-line);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 20px 0;
  z-index: 5;
}
.mm-noi .nav-item:hover .simple-drop,
.mm-noi .nav-item.mm-open .simple-drop {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}
.mm-noi .simple-drop a {
  display: block;
  padding: 10px 28px;
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 16px;
  font-weight: 300;
  color: var(--mm-noi-cream);
  text-decoration: none;
  letter-spacing: 0.03em;
  transition: color 0.25s, background 0.25s, padding-left 0.3s;
}
.mm-noi .simple-drop a:hover {
  color: var(--mm-noi-gold);
  background: rgba(201, 168, 76, 0.04);
  padding-left: 38px;
}

/* ── Stagger animation for links on open ── */
.mm-noi .nav-item:hover .mega-links li,
.mm-noi .nav-item.mm-open .mega-links li {
  animation: mm-noi-fade 0.4s ease both;
}
.mm-noi .nav-item:hover .mega-links li:nth-child(1),
.mm-noi .nav-item.mm-open .mega-links li:nth-child(1) { animation-delay: 0.05s; }
.mm-noi .nav-item:hover .mega-links li:nth-child(2),
.mm-noi .nav-item.mm-open .mega-links li:nth-child(2) { animation-delay: 0.09s; }
.mm-noi .nav-item:hover .mega-links li:nth-child(3),
.mm-noi .nav-item.mm-open .mega-links li:nth-child(3) { animation-delay: 0.13s; }
.mm-noi .nav-item:hover .mega-links li:nth-child(4),
.mm-noi .nav-item.mm-open .mega-links li:nth-child(4) { animation-delay: 0.17s; }
.mm-noi .nav-item:hover .mega-links li:nth-child(5),
.mm-noi .nav-item.mm-open .mega-links li:nth-child(5) { animation-delay: 0.21s; }
.mm-noi .nav-item:hover .mega-links li:nth-child(6),
.mm-noi .nav-item.mm-open .mega-links li:nth-child(6) { animation-delay: 0.25s; }

@keyframes mm-noi-fade {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (max-width: 760px) {
  .mm-noi .nav-trigger { padding: 18px 14px; font-size: 9px; }
  .mm-noi .mega { width: calc(100vw - 24px); }
  .mm-noi .mega.cols-3-img,
  .mm-noi .mega.cols-editorial { grid-template-columns: 1fr; }
  .mm-noi .mega-img { min-height: 180px; }
  .mm-noi .mega-col { border-left: 0; border-top: 1px solid var(--mm-noi-line); }
}

@media (prefers-reduced-motion: reduce) {
  .mm-noi .mega,
  .mm-noi .simple-drop,
  .mm-noi .mega-img img,
  .mm-noi .mega-links li a,
  .mm-noi .mega-footer-strip a { transition: none; animation: none; }
  .mm-noi .nav-item:hover .mega-img img,
  .mm-noi .nav-item.mm-open .mega-img img { transform: none; }
}
JS 
(() => {
  document.querySelectorAll('.mm-noi .nav-item, .mm-cyb .nav-item, .mm-bio .nav-item, .mm-dep .nav-item, .mm-typ .nav-item, .mm-dea .nav-item').forEach(item => {
    const trigger = item.querySelector('.nav-trigger');
    if (!trigger) return;

    // Mouse + keyboard: toggle open on click / Enter / Space
    trigger.addEventListener('click', e => {
      e.preventDefault();
      const isOpen = item.classList.contains('mm-open');
      // Close any sibling that's open so only one panel shows at a time
      item.parentElement?.querySelectorAll('.nav-item.mm-open').forEach(other => {
        if (other !== item) other.classList.remove('mm-open');
        const otherBtn = other.querySelector('.nav-trigger');
        if (otherBtn) otherBtn.setAttribute('aria-expanded', 'false');
      });
      item.classList.toggle('mm-open', !isOpen);
      trigger.setAttribute('aria-expanded', String(!isOpen));
    });
  });

  // Outside-click closes all open panels
  document.addEventListener('click', e => {
    document.querySelectorAll('.mm-noi .nav-item.mm-open, .mm-cyb .nav-item.mm-open, .mm-bio .nav-item.mm-open, .mm-dep .nav-item.mm-open, .mm-typ .nav-item.mm-open, .mm-dea .nav-item.mm-open').forEach(item => {
      if (!item.contains(e.target)) {
        item.classList.remove('mm-open');
        const btn = item.querySelector('.nav-trigger');
        if (btn) btn.setAttribute('aria-expanded', 'false');
      }
    });
  });

  // Escape closes the currently open panel
  document.addEventListener('keydown', e => {
    if (e.key !== 'Escape') return;
    document.querySelectorAll('.mm-noi .nav-item.mm-open, .mm-cyb .nav-item.mm-open, .mm-bio .nav-item.mm-open, .mm-dep .nav-item.mm-open, .mm-typ .nav-item.mm-open, .mm-dea .nav-item.mm-open').forEach(item => {
      item.classList.remove('mm-open');
      const btn = item.querySelector('.nav-trigger');
      if (btn) btn.setAttribute('aria-expanded', 'false');
    });
  });
})();