/* Unified Navbar Styling */
.nk-header {transition:background-color .35s ease, box-shadow .35s ease;}

/* Pure black background & shadow after scroll/fix */
.nk-header.scrolled,
.nk-header.scrolled .header-main,
body.has-fixed.is-dark .header-main,
body.has-fixed.is-dark .header-main:before,
.nk-header.scrolled .header-navbar::before,
.nk-header.scrolled.has-fixed.is-dark .header-main,
.nk-header.scrolled.has-fixed.is-dark .header-navbar::before { 
  background:#000000 !important; 
  box-shadow:0 4px 16px -6px rgba(0,0,0,.6);
}

/* Link colors when scrolled */
.nk-header.scrolled .menu-link.nav-link,
.nk-header.scrolled .menu > li > a,
.nk-header.scrolled .header-menu a { color:#ffffff !important; }

/* Hover state */
.nk-header.scrolled .menu-link.nav-link:hover {color:#28bcfd !important;}

/* Submenu indicator visibility tweak */
.nk-header.scrolled .menu-item.has-sub > a.menu-link:after {filter:brightness(1.2);}