.mega-nav {
  background: #fff;
  border-bottom: 2px solid #e5e7eb;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.mega-nav__root {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.mega-nav__root > li {
  position: relative;
}

.mega-nav__root > li > a {
  display: block;
  padding: 16px 20px;
  color: #374151;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.3s, color 0.3s;
}

.mega-nav__root > li > a:hover {
  background: #f3f4f6;
  color: #667eea;
}

.mega-nav__root > li.has-sub > a::after {
  content: ' ▾';
  font-size: 12px;
  margin-left: 4px;
}

.mega-nav__root > li .submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  min-width: 220px;
  z-index: 100;
  padding: 8px 0;
}

.mega-nav__root > li:hover .submenu {
  display: block;
}

.submenu {
  list-style: none;
  padding: 0;
  margin: 0;
}

.submenu li {
  margin: 0;
}

.submenu li a {
  display: block;
  padding: 10px 16px;
  color: #374151;
  text-decoration: none;
  transition: background 0.2s;
}

.submenu li a:hover {
  background: #f3f4f6;
  color: #667eea;
}

.submenu .empty {
  padding: 10px 16px;
  color: #9ca3af;
  font-style: italic;
}

@media (max-width: 768px) {
  .mega-nav__root {
    flex-direction: column;
    align-items: flex-start;
  }

  .mega-nav__root > li {
    width: 100%;
  }

  .mega-nav__root > li .submenu {
    position: relative;
    box-shadow: none;
    border: none;
    border-left: 3px solid #667eea;
    padding-left: 12px;
  }
}