/* ============================================================
   nav.css – Nawigacja: sticky, przezroczysta → solid przy scrollu
   Premier Motors v2.0
   ============================================================ */

/* ── Bazowe style nawigacji ── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 500;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--transition-base), box-shadow var(--transition-base), backdrop-filter var(--transition-base);
}

/* Stan domyślny: przezroczysty (na hero) */
.site-nav.transparent {
  background: transparent;
}

/* Stan po scrollu > 80px: ciemne tło z blur */
.site-nav.scrolled {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--color-border-subtle);
}

/* Podstrony (bez hero): zawsze ciemne tło */
.site-nav.solid {
  background: rgba(10, 10, 10, 0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border-subtle);
}

/* ── Wewnętrzna struktura nawigacji ── */
.nav-inner {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* ── Logo ── */
.nav-logo {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-white);
  transition: color var(--transition-fast);
  flex-shrink: 0;
}

.nav-logo span {
  color: var(--color-gold);
}

.nav-logo:hover {
  color: var(--color-white);
}

/* ── Menu desktopowe ── */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
  justify-content: center;
}

.nav-link {
  position: relative;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-white-dim);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast);
}

/* Animowany podkreślnik linka */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  right: 50%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
  border-radius: var(--radius-full);
  transition: left var(--transition-base), right var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-white);
}

.nav-link:hover::after,
.nav-link.active::after {
  left: var(--space-3);
  right: var(--space-3);
}

/* ── Przyciski akcji w nav ── */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.nav-phone {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-white-dim);
  transition: color var(--transition-fast);
  padding: var(--space-2) var(--space-3);
}

.nav-phone:hover {
  color: var(--color-gold);
}

.nav-cta {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  white-space: nowrap;
}

/* ── Hamburger (mobile) ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 4px;
  justify-content: center;
  align-items: flex-end;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 600;
}

.hamburger-line {
  display: block;
  height: 2px;
  background: var(--color-white);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base), width var(--transition-base);
}

.hamburger-line:nth-child(1) { width: 24px; }
.hamburger-line:nth-child(2) { width: 18px; }
.hamburger-line:nth-child(3) { width: 24px; }

/* Animacja hamburgera → X */
.nav-hamburger.open .hamburger-line:nth-child(1) {
  width: 24px;
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.open .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-hamburger.open .hamburger-line:nth-child(3) {
  width: 24px;
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Menu mobilne (overlay) ── */
.nav-mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 510;
  background: rgba(10, 10, 10, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-20px);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base);
  padding: var(--space-8);
}

.nav-mobile-overlay.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Linki w mobilnym menu */
.nav-mobile-overlay .nav-link {
  font-size: var(--text-3xl);
  font-weight: 800;
  color: #f5f5f5 !important;
  padding: var(--space-3) var(--space-6);
  min-height: 64px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.nav-mobile-overlay .nav-link::after {
  display: none;
}

.nav-mobile-overlay .nav-link:hover {
  color: var(--color-gold) !important;
  transform: scale(1.05);
}

/* Stagger animacja wejścia linków mobilnych */
.nav-mobile-overlay .nav-link {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease, color var(--transition-fast);
}

.nav-mobile-overlay.open .nav-link {
  opacity: 1;
  transform: translateY(0);
}

.nav-mobile-overlay.open .nav-link:nth-child(1) { transition-delay: 0.05s; }
.nav-mobile-overlay.open .nav-link:nth-child(2) { transition-delay: 0.10s; }
.nav-mobile-overlay.open .nav-link:nth-child(3) { transition-delay: 0.15s; }
.nav-mobile-overlay.open .nav-link:nth-child(4) { transition-delay: 0.20s; }
.nav-mobile-overlay.open .nav-link:nth-child(5) { transition-delay: 0.25s; }
.nav-mobile-overlay.open .nav-link:nth-child(6) { transition-delay: 0.30s; }
.nav-mobile-overlay.open .nav-link:nth-child(7) { transition-delay: 0.35s; }

.nav-mobile-contact {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.nav-mobile-contact a {
  font-size: var(--text-lg);
  color: rgba(245, 245, 245, 0.7);
  transition: color var(--transition-fast);
}

.nav-mobile-contact a:hover {
  color: var(--color-gold);
}

/* ── Scroll-spy – aktywny link podświetlony ── */
.nav-link[data-section].active {
  color: var(--color-gold);
}

.nav-link[data-section].active::after {
  left: var(--space-3);
  right: var(--space-3);
  background: var(--color-gold);
}

/* ── Responsywność ── */
@media (max-width: 1024px) {
  .nav-menu {
    gap: 0;
  }
  .nav-link {
    padding: var(--space-2) var(--space-2);
    font-size: 0.7rem;
  }
}

@media (max-width: 900px) {
  .nav-menu {
    display: none;
  }
  .nav-phone {
    display: none;
  }
  .nav-hamburger {
    display: flex;
  }
  .nav-cta {
    display: none;
  }
}

@media (max-width: 480px) {
  .nav-mobile-overlay .nav-link {
    font-size: var(--text-2xl);
  }
}