/* ============================================================
   Navbar — Glassmorphism Sticky Navigation
   ============================================================
   Apple-inspired navigation with transparent→frosted transition,
   animated underlines, mega dropdowns, and mobile overlay menu.
   ============================================================ */

/* ── Top Utility Bar ──────────────────────────────────────── */
.top-bar {
  background-color: var(--color-dark);
  color: var(--color-text-inverse);
  padding-block: var(--space-sm);
  font-size: var(--text-caption);
  position: relative;
  z-index: var(--z-sticky);
}

.top-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.top-bar__contacts {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.top-bar__contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-text-inverse);
  opacity: 0.85;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.top-bar__contact-item:hover {
  opacity: 1;
  color: var(--color-accent);
}

.top-bar__contact-item svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  color: var(--color-accent);
}

.top-bar__right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.top-bar__socials {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.top-bar__social-link {
  color: var(--color-text-inverse);
  opacity: 0.7;
  transition: opacity var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
}

.top-bar__social-link:hover {
  opacity: 1;
  color: var(--color-accent);
}

.top-bar__social-link svg {
  width: 14px;
  height: 14px;
}

.top-bar__badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--color-accent);
  color: var(--color-dark);
  font-size: var(--text-badge);
  font-weight: var(--weight-bold);
  border-radius: var(--radius-pill);
  letter-spacing: var(--tracking-wide);
}

/* ── Main Navbar ──────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  padding-block: var(--space-sm);
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: background 0.5s var(--ease-apple-fluid),
              box-shadow 0.5s var(--ease-apple-fluid),
              padding 0.5s var(--ease-apple-fluid),
              border-color 0.4s var(--ease-apple-fluid);
}

.navbar--scrolled {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(28px) saturate(190%);
  -webkit-backdrop-filter: blur(28px) saturate(190%);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  padding-block: var(--space-xs);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* ── Brand ────────────────────────────────────────────────── */
.navbar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  flex-shrink: 0;
  max-width: 80%;
}

.navbar__brand-icon {
  width: 38px;
  height: 38px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-inverse);
  flex-shrink: 0;
  transition: transform 0.4s var(--ease-apple-bounce);
}

@media (min-width: 768px) {
  .navbar__brand-icon {
    width: 42px;
    height: 42px;
  }
}

.navbar__brand:hover .navbar__brand-icon {
  transform: scale(1.08) rotate(-3deg);
}

.navbar__brand-icon svg {
  width: 20px;
  height: 20px;
}

.navbar__brand-text {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.navbar__brand-name {
  font-family: var(--font-primary);
  font-size: 1.15rem;
  font-weight: var(--weight-extrabold);
  color: var(--color-primary);
  line-height: var(--leading-none);
  letter-spacing: var(--tracking-tight);
}

.navbar__brand-tagline {
  font-size: 0.6rem;
  color: var(--color-text-muted);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-top: 2px;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}

@media (max-width: 480px) {
  .navbar__brand-tagline {
    display: none; /* Hide tagline on very narrow screens for clean brand */
  }
}

/* ── Desktop Nav Links ────────────────────────────────────── */
.navbar__menu {
  display: none;
  align-items: center;
  gap: var(--space-xs);
}

@media (min-width: 992px) {
  .navbar__menu {
    display: flex;
  }
}

.navbar__link {
  position: relative;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-secondary);
  font-size: var(--text-small);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color 0.3s var(--ease-apple-fluid),
              background 0.3s var(--ease-apple-fluid);
}

.navbar__link:hover,
.navbar__link--active {
  color: var(--color-primary);
}

/* Animated underline */
.navbar__link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-pill);
  transition: transform 0.4s var(--ease-apple-spring);
}

.navbar__link:hover::after,
.navbar__link--active::after {
  transform: translateX(-50%) scaleX(1);
}

/* ── Dropdown ─────────────────────────────────────────────── */
.navbar__dropdown {
  position: relative;
}

.navbar__dropdown-trigger {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  cursor: pointer;
}

.navbar__dropdown-trigger svg {
  width: 14px;
  height: 14px;
  transition: transform 0.35s var(--ease-apple-bounce);
}

.navbar__dropdown[aria-expanded="true"] .navbar__dropdown-trigger svg {
  transform: rotate(180deg);
}

.navbar__dropdown-menu {
  position: absolute;
  top: calc(100% + var(--space-sm));
  left: 50%;
  transform: translateX(-50%) translateY(14px) scale(0.95);
  filter: blur(8px);
  min-width: 220px;
  padding: var(--space-sm);
  background: var(--color-glass-strong);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.35s var(--ease-apple-fluid),
              transform 0.35s var(--ease-apple-fluid),
              filter 0.35s var(--ease-apple-fluid),
              visibility 0.35s;
  z-index: var(--z-dropdown);
}

.navbar__dropdown[aria-expanded="true"] .navbar__dropdown-menu,
.navbar__dropdown:hover .navbar__dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0px) scale(1);
  filter: blur(0);
}

.navbar__dropdown[aria-expanded="true"] .navbar__dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.navbar__dropdown-item {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}

.navbar__dropdown-item:hover {
  background: var(--color-primary-subtle);
  color: var(--color-primary);
}

/* ── Nav CTA ──────────────────────────────────────────────── */
.navbar__cta {
  margin-left: var(--space-md);
}

/* ── Mobile Toggle ────────────────────────────────────────── */
.navbar__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast) var(--ease-out);
  z-index: calc(var(--z-overlay) + 1);
  flex-shrink: 0;
}

.navbar__toggle:hover {
  background: var(--color-background);
}

@media (min-width: 992px) {
  .navbar__toggle {
    display: none;
  }
}

.navbar__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: var(--radius-pill);
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-normal) var(--ease-out);
}

.navbar__toggle-bar:nth-child(1) {
  margin-bottom: 5px;
}

.navbar__toggle-bar:nth-child(3) {
  margin-top: 5px;
}

/* Toggle active → X morph */
.navbar__toggle--active .navbar__toggle-bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar__toggle--active .navbar__toggle-bar:nth-child(2) {
  opacity: 0;
}

.navbar__toggle--active .navbar__toggle-bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Mobile Overlay Menu ──────────────────────────────────── */
.navbar__mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: var(--z-overlay);
  display: flex;
  flex-direction: column;
  padding: calc(80px + var(--space-xl)) var(--container-padding) var(--space-2xl);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-10px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out),
              visibility var(--duration-slow);
  overflow-y: auto;
}

.navbar__mobile-menu--open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.navbar__mobile-link {
  display: block;
  padding: var(--space-md) 0;
  font-family: var(--font-primary);
  font-size: 1.5rem;
  font-weight: var(--weight-bold);
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-light);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}

.navbar__mobile-menu--open .navbar__mobile-link {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered animation */
.navbar__mobile-menu--open .navbar__mobile-link:nth-child(1) { transition-delay: 80ms; }
.navbar__mobile-menu--open .navbar__mobile-link:nth-child(2) { transition-delay: 130ms; }
.navbar__mobile-menu--open .navbar__mobile-link:nth-child(3) { transition-delay: 180ms; }
.navbar__mobile-menu--open .navbar__mobile-link:nth-child(4) { transition-delay: 230ms; }
.navbar__mobile-menu--open .navbar__mobile-link:nth-child(5) { transition-delay: 280ms; }
.navbar__mobile-menu--open .navbar__mobile-link:nth-child(6) { transition-delay: 330ms; }
.navbar__mobile-menu--open .navbar__mobile-link:nth-child(7) { transition-delay: 380ms; }

.navbar__mobile-link:hover,
.navbar__mobile-link--active {
  color: var(--color-primary);
}

/* Mobile dropdown sub-items */
.navbar__mobile-sub {
  padding-left: var(--space-lg);
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--duration-normal) var(--ease-out);
}

.navbar__mobile-sub--open {
  max-height: 300px;
}

.navbar__mobile-sub-link {
  display: block;
  padding: var(--space-sm) 0;
  font-size: 1rem;
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.navbar__mobile-sub-link:hover {
  color: var(--color-primary);
}

.navbar__mobile-cta {
  margin-top: auto;
  padding-top: var(--space-xl);
}