/* ============================================
   NAV — Sticky top bar + WhatsApp header CTA
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250,249,245,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0,0,0,0.04);
  transition: box-shadow var(--duration-normal) var(--ease-out);
}

.nav.is-scrolled,
.nav.is-open {
  box-shadow: var(--shadow-sm);
  background: var(--color-surface); /* Solid background when open or scrolled */
  backdrop-filter: none;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.nav__logo {
  display: flex;
  align-items: center;
}

.nav__logo img {
  height: 60px;
  width: auto;
  display: block;
  border-radius: var(--radius-sm);
}

.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-xl);
}

.nav__link {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-on-surface-variant);
  transition: color var(--duration-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav__link:hover {
  color: var(--color-primary);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__cta {
  display: none;
}

.nav__hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
  cursor: pointer;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-on-surface);
  border-radius: 2px;
  transition: all var(--duration-normal) var(--ease-out);
}

/* Mobile menu */
.nav__mobile-menu {
  display: none;
  position: fixed;
  top: 80px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-surface) !important; /* Force solid brand background */
  padding: var(--space-xl) var(--space-lg);
  z-index: 2000;
  overflow-y: auto;
  opacity: 1 !important;
  visibility: visible !important;
}

.nav__mobile-menu.is-open {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  animation: slideDown 400ms var(--ease-out);
}

.nav__mobile-link {
  font-family: var(--font-display);
  font-size: var(--text-md); /* Reduced from XL for better fit */
  font-weight: var(--weight-semibold);
  color: var(--color-on-surface);
  padding: var(--space-lg) var(--space-md);
  border-bottom: 1px solid var(--color-outline-variant);
  transition: background var(--duration-fast);
  border-radius: var(--radius-md);
}

.nav__mobile-link:hover {
  background: var(--color-surface-container-low);
  color: var(--color-primary);
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (min-width: 768px) {
  .nav__links { display: flex; }
  .nav__cta { display: inline-flex; }
  .nav__hamburger { display: none; }
}