/* ============================================================
   NCLI — Modern Refresh (safe, additive, no layout changes)
   Load order: style.css -> ui-polish.css -> modern-refresh.css -> dark-mode-fixes.css
   Only refines design tokens, shadows, radii, buttons, cards, inputs.
   Dark mode is handled by dark-mode-fixes.css (loaded after this).
============================================================ */

:root {
  /* Layered shadow ladder for depth */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 18px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 14px 34px rgba(15, 23, 42, 0.10);
  --shadow-blue: 0 10px 24px rgba(37, 99, 235, 0.20);

  /* Radius scale */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 999px;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Screen-reader-only utility (visually hidden, accessible to AT) */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Smooth, consistent micro-interactions (only safe props) */
a,
.btn-primary,
.btn-outline,
.btn-white,
.course-card, .service-card, .product-card, .blog-card,
.facility-card, .team-card, .pricing-card, .ds-card, .gj-card,
.job-card, .location-card, .mv-card, .gs-card {
  transition: transform 0.25s var(--ease),
              box-shadow 0.25s var(--ease),
              background-color 0.25s var(--ease),
              border-color 0.25s var(--ease),
              color 0.2s var(--ease);
}

/* ---------- Buttons ---------- */
.btn-primary {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.22);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-blue);
}

.btn-outline:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ---------- Cards: unified soft radius + layered shadow + lift ---------- */
.course-card, .service-card, .product-card, .blog-card,
.facility-card, .team-card, .pricing-card, .ds-card, .gj-card,
.job-card, .location-card, .mv-card, .gs-card {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.course-card:hover, .service-card:hover, .product-card:hover, .blog-card:hover,
.facility-card:hover, .team-card:hover, .pricing-card:hover, .ds-card:hover,
.gj-card:hover, .job-card:hover, .location-card:hover, .mv-card:hover, .gs-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Featured course card keeps a subtle brand glow */
.course-card.featured {
  box-shadow: var(--shadow-sm), 0 10px 28px rgba(37, 99, 235, 0.12);
}

/* ---------- Inputs / selects / textareas ---------- */
input:not([type="checkbox"]):not([type="radio"]):not([type="submit"]):not([type="button"]),
select,
textarea {
  border-radius: var(--radius-sm);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

input:not([type="checkbox"]):not([type="radio"]):focus,
select:focus,
textarea:focus {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* ---------- Headings: slightly tighter, modern ---------- */
.section-title {
  letter-spacing: -0.5px;
}

/* ---------- Images: gentle rounding on content media ---------- */
.product-card img,
.blog-card img,
.gallery-item img {
  border-radius: var(--radius-md);
}

/* ============================================================
   MODERN HEADER & NAVBAR
============================================================ */

/* Glassy header with smooth scrolled state */
.header {
  background: rgba(255, 255, 255, 0.82);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
  transition: box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 6px 24px rgba(15, 23, 42, 0.08);
}

/* Gradient logo mark with subtle pop on hover */
.logo-icon {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.28);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.logo:hover .logo-icon {
  transform: translateY(-1px) rotate(-4deg) scale(1.05);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.38);
}

.logo-main {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Pill-shaped nav links with animated underline */
.navbar {
  gap: 4px;
}

.nav-link {
  position: relative;
  border-radius: var(--radius-full);
  padding: 9px 16px;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

/* growing underline pill on hover */
.nav-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 5px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, #2563eb, #1d4ed8);
  transform: translateX(-50%);
  transition: width 0.25s var(--ease);
}

.nav-link:hover {
  background: #eff6ff;
  color: #2563eb;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 22px;
}

/* Active link = filled gradient pill */
.nav-link.active {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #fff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.nav-link.active::after {
  display: none;
}

/* Chevron in dropdown toggles */
.nav-dropdown-toggle .fa-chevron-down {
  font-size: 10px;
  margin-left: 2px;
  transition: transform 0.25s var(--ease);
}

.nav-dropdown:hover .nav-dropdown-toggle .fa-chevron-down {
  transform: rotate(180deg);
}

/* ---------- Dropdown menu: modern card + slide-fade ---------- */
.dropdown-menu {
  border-radius: 14px;
  padding: 8px;
  min-width: 210px;
  border: 1px solid rgba(226, 232, 240, 0.9);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.14);
}

.dropdown-menu a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 13.5px;
  color: #475569;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), transform 0.18s var(--ease);
}

/* icon chip before each dropdown item */
.dropdown-menu a .dd-ico {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: #eff6ff;
  color: #2563eb;
  font-size: 13px;
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.dropdown-menu a:hover {
  background: #eff6ff;
  color: #2563eb;
  transform: translateX(3px);
}

.dropdown-menu a:hover .dd-ico {
  background: #2563eb;
  color: #fff;
}

/* Smoother dropdown reveal (overrides the older keyframe timing) */
.dropdown-menu {
  animation: ddReveal 0.22s var(--ease) !important;
}

@keyframes ddReveal {
  from { opacity: 0; transform: translateY(-6px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* Modern theme toggle + CTA */
.theme-toggle {
  border-radius: var(--radius-full);
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.theme-toggle:hover {
  transform: translateY(-1px) rotate(-10deg);
}

.header-cta.btn-primary {
  border-radius: var(--radius-full);
  padding-left: 20px;
  padding-right: 20px;
}

/* Dark mode header glass */
body.dark .header {
  background: rgba(15, 23, 42, 0.78);
  border-bottom-color: rgba(51, 65, 85, 0.7);
}

body.dark .header.scrolled {
  background: rgba(15, 23, 42, 0.9);
}

body.dark .nav-link:hover {
  background: rgba(37, 99, 235, 0.18);
}