/* ============================================================
   NAVIGATION — Premium Sticky Navbar
   ============================================================ */

/* ─── Nav Base ────────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Transparent state (over hero) */
#navbar.nav-transparent {
  background: transparent;
  border-bottom: 1px solid transparent;
}

/* Scrolled state */
#navbar.nav-scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(203, 213, 225, 0.4);
  box-shadow: 0 4px 32px rgba(26, 111, 191, 0.1);
  height: 70px;
}

/* Dark page navbars (non-hero) */
#navbar.nav-solid {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(203, 213, 225, 0.4);
  box-shadow: 0 4px 32px rgba(26, 111, 191, 0.08);
}

/* ─── Nav Inner ───────────────────────────────────────────── */
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding-inline: var(--container-pad);
  max-width: var(--container-wide);
  margin-inline: auto;
}

/* ─── Logo ────────────────────────────────────────────────── */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity var(--transition-base);
}

.nav-logo:hover {
  opacity: 0.85;
}

.nav-logo-icon {
  width: 42px;
  height: 42px;
  background: var(--sky-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(26,111,191,0.3);
  transition: all var(--transition-spring);
}

.nav-logo-icon i {
  font-size: 1.2rem;
  color: white;
}

.nav-logo:hover .nav-logo-icon {
  transform: scale(1.05) rotate(-3deg);
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-logo-name {
  font-family: var(--font-secondary);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  transition: color var(--transition-base);
}

.nav-logo-subtitle {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.65;
  transition: color var(--transition-base);
}

/* Transparent nav — white text */
.nav-transparent .nav-logo-name,
.nav-transparent .nav-logo-subtitle {
  color: var(--white);
}

/* Scrolled nav — dark text */
.nav-scrolled .nav-logo-name,
.nav-solid .nav-logo-name {
  color: var(--charcoal);
}

.nav-scrolled .nav-logo-subtitle,
.nav-solid .nav-logo-subtitle {
  color: var(--text-muted);
}

/* ─── Nav Links ───────────────────────────────────────────── */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-link {
  position: relative;
  display: block;
  padding: 0.5rem 1rem;
  font-family: var(--font-secondary);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

/* Underline indicator */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--sky-blue);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

/* Transparent state */
.nav-transparent .nav-link {
  color: rgba(255, 255, 255, 0.85);
}

.nav-transparent .nav-link:hover {
  color: var(--white);
  background: rgba(255,255,255,0.12);
}

.nav-transparent .nav-link.active {
  color: var(--white);
  background: rgba(255,255,255,0.15);
}

.nav-transparent .nav-link::after {
  background: var(--white);
}

/* Scrolled / Solid state */
.nav-scrolled .nav-link,
.nav-solid .nav-link {
  color: var(--text-secondary);
}

.nav-scrolled .nav-link:hover,
.nav-solid .nav-link:hover {
  color: var(--sky-blue);
  background: var(--sky-blue-soft);
}

.nav-scrolled .nav-link.active,
.nav-solid .nav-link.active {
  color: var(--sky-blue);
  background: var(--sky-blue-soft);
}

.nav-scrolled .nav-link::after,
.nav-solid .nav-link::after {
  background: var(--sky-blue);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: calc(100% - 2rem);
}

/* ─── Nav CTA ─────────────────────────────────────────────── */
.nav-cta {
  font-size: var(--text-sm);
  padding: 0.6rem 1.5rem;
}

/* ─── Mobile Menu Toggle ──────────────────────────────────── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  cursor: pointer;
  background: transparent;
  border: none;
  transition: background var(--transition-base);
  gap: 5px;
  padding: 8px;
}

.nav-transparent .nav-toggle:hover {
  background: rgba(255,255,255,0.1);
}

.nav-scrolled .nav-toggle:hover,
.nav-solid .nav-toggle:hover {
  background: var(--light-grey);
}

.nav-toggle-bar {
  width: 24px;
  height: 2px;
  border-radius: 2px;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: center;
}

.nav-transparent .nav-toggle-bar {
  background: var(--white);
}

.nav-scrolled .nav-toggle-bar,
.nav-solid .nav-toggle-bar {
  background: var(--charcoal);
}

/* Toggle animation — open state */
.nav-toggle.is-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-toggle.is-open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ─── Mobile Drawer ───────────────────────────────────────── */
.nav-drawer {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(32px);
  -webkit-backdrop-filter: blur(32px);
  border-top: 1px solid rgba(203, 213, 225, 0.4);
  box-shadow: 0 20px 60px rgba(26, 111, 191, 0.12);
  padding: var(--space-xl) var(--container-pad);
  transform: translateY(-10px);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: calc(var(--z-nav) - 1);
  max-height: calc(100vh - var(--nav-height));
  overflow-y: auto;
}

.nav-drawer.is-open {
  transform: translateY(0);
  opacity: 1;
}

.nav-drawer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-xl);
}

.nav-drawer-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-lg);
  font-family: var(--font-secondary);
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--charcoal);
  text-decoration: none;
  transition: all var(--transition-base);
  border: 1px solid transparent;
}

.nav-drawer-link:hover,
.nav-drawer-link.active {
  background: var(--sky-blue-soft);
  color: var(--sky-blue);
  border-color: rgba(26,111,191,0.1);
}

.nav-drawer-link i {
  font-size: var(--text-xs);
  opacity: 0.5;
}

.nav-drawer-cta {
  display: flex;
  gap: var(--space-md);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--light-grey);
}

.nav-drawer-cta .btn {
  flex: 1;
  justify-content: center;
}

/* ─── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .nav-desktop {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-drawer {
    display: block;
  }
}