.group:hover .dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .main-nav .active {
    color: var(--brand-primary) !important;
    font-weight: 600;
    position: relative;
  }

  .header-nav .main-nav .active::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 2px;
    background-color: var(--brand-primary);
    border-radius: 1px;
  }

  #ai_header {
    transition: all 200ms ease;
    background-color: rgba(255, 255, 255, 0.85) !important;
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid rgba(243, 244, 246, 0.8) !important;
  }
  body.scrolled #ai_header {
    background-color: rgba(255, 255, 255, 0.95) !important;
    box-shadow: 0 1px 0 rgba(0,0,0,0.04);
  }

  .nav-link:hover { color: var(--brand-dark) !important; }
  .main-nav .active { color: var(--brand-primary) !important; }

  .header-cta {
    box-shadow: 0 1px 2px rgba(13, 148, 136, 0.2);
  }
  .header-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(13, 148, 136, 0.25);
  }