/* Fixed header. All page heroes are green (.theme-invert), so nav text is cream;
   on scroll it gains a solid green background. */

.nav {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: var(--z-nav);
  color: var(--cream);
  transition: background var(--dur-fast) ease, box-shadow var(--dur-fast) ease;
}
.nav.is-scrolled {
  background: var(--green-900);
  box-shadow: 0 1px 0 rgb(250 247 242 / 0.08);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  height: 4.75rem;
}

.nav-logo img { height: 2.1rem; width: auto; }

.nav-links {
  display: flex;
  gap: var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
}
.nav-links a {
  position: relative;
  padding-block: 0.35rem;
}
.nav-links a::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform var(--dur-med) var(--ease-out);
}
.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after { transform: scaleX(1); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.nav-lang {
  font-size: var(--text-sm);
  font-weight: 600;
  opacity: 0.85;
  padding: 0.35rem 0.5rem;
}
.nav-lang:hover { opacity: 1; text-decoration: underline; }

.nav-cta {
  background: var(--cream);
  color: var(--green);
}
.nav-cta:hover { background: var(--cream-dim); }

.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  align-items: center;
}
.nav-burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur-fast) ease, opacity var(--dur-fast) ease;
}
.nav-burger[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* Full-screen mobile menu */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: var(--green-900);
  display: grid;
  align-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-med) var(--ease-out), visibility 0s linear var(--dur-med);
}
.nav.is-open .nav-overlay {
  opacity: 1;
  visibility: visible;
  transition-delay: 0s;
}
.nav-overlay-links {
  display: grid;
  gap: var(--space-3);
  font-size: var(--text-2xl);
  font-weight: 800;
  margin-block-end: var(--space-5);
}
[lang="ar"] .nav-overlay-links { font-weight: 700; }
.nav-overlay-links a { opacity: 0.9; }
.nav-overlay-links a:hover,
.nav-overlay-links a[aria-current="page"] { opacity: 1; text-decoration: underline; }

@media (max-width: 60rem) {
  .nav-desktop, .nav-cta { display: none; }
  .nav-burger { display: flex; }
}
@media (min-width: 60.01rem) {
  .nav-overlay { display: none; }
}

body.nav-locked { overflow: hidden; }