/* ============================================================
   Wspólna nawigacja dla wszystkich stron (index / offer / contact).
   Jedno źródło prawdy — zmiana tutaj zmienia menu na całej stronie.

   Warianty tła (klasa na <nav class="nav-header ...">):
     .overlay  → przezroczyste, nałożone na hero (strona główna)
     .solid    → ciemny pasek (podstrony)

   Zależy od zmiennych z :root strony (--bg, --cream, --gold, --line,
   --panel, --serif), które są zdefiniowane w main/offer/contact.css.
   ============================================================ */

.nav-header {
  width: 100%;
  z-index: 5;
}
.nav-header.overlay {
  position: absolute;
  top: 0;
  left: 0;
}
.nav-header.solid {
  position: relative;
  background: linear-gradient(to bottom, #1d1712, var(--bg));
  border-bottom: 1px solid var(--line);
}

.nav-container {
  display: flex;
  height: 90px;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1410px;
  margin: 0 auto;
  padding: 0 2rem;
}

.nav-header .logo {
  display: flex;
  align-items: center;
  height: 60px;
  flex-shrink: 0;
}
.nav-header .logo img {
  height: 100%;
  width: auto;
  border-radius: 8px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  font-family: var(--serif);
}
.nav-item a {
  position: relative;
  display: block;
  padding: 0.75rem 1.4rem;
  font-size: 1.35rem;
  letter-spacing: 0.01em;
  color: var(--cream);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.3s ease;
}
.nav-item a[aria-current="page"] {
  color: var(--gold);
}
.nav-item a::after {
  content: "";
  position: absolute;
  left: 1.4rem;
  right: 1.4rem;
  bottom: 0.45rem;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}
.nav-item a:hover {
  color: var(--gold);
}
.nav-item a:hover::after,
.nav-item a[aria-current="page"]::after {
  transform: scaleX(1);
}

/* Burger (ukryty na desktopie) */
.burger {
  display: none;
  z-index: 6;
  padding: 10px;
  background: transparent;
  border: 0;
  cursor: pointer;
}
.hamburger-box {
  width: 26px;
  height: 18px;
  display: inline-block;
  position: relative;
}
.hamburger-inner {
  width: 100%;
  height: 2px;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  position: absolute;
  background: var(--cream);
}
.hamburger-inner::before,
.hamburger-inner::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--cream);
  transition: all 0.4s ease;
}
.hamburger-inner::before {
  top: -8px;
}
.hamburger-inner::after {
  top: 8px;
}
.burger.active .hamburger-inner {
  background-color: transparent;
}
.burger.active .hamburger-inner::after {
  transform: translateY(-8px) rotate(-45deg);
  background-color: var(--gold);
}
.burger.active .hamburger-inner::before {
  transform: translateY(8px) rotate(45deg);
  background-color: var(--gold);
}

/* ============ Mobile: menu jako wysuwana szuflada ============ */
@media (max-width: 1100px) {
  .burger {
    display: block;
  }
  .nav-link {
    position: fixed;
    right: 0;
    top: 0;
    z-index: 5;
    flex-direction: column;
    justify-content: center;
    gap: 1rem;
    background: var(--panel);
    padding: 6rem 1.5rem 2rem;
    width: min(70%, 320px);
    height: 100vh;
    border-left: 1px solid var(--line);
    transform: translateX(100%);
    transition: transform 0.5s ease;
  }
  .nav-link.active {
    transform: translateX(0);
  }
  .nav-item {
    width: 100%;
  }
  .nav-item a {
    font-size: 1.6rem;
    padding: 1rem 1.5rem;
    text-align: center;
  }
  .nav-item a::after {
    display: none;
  }
}

@media (max-width: 700px) {
  .nav-container {
    padding: 0 1rem;
  }
  .nav-header .logo {
    height: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nav-link {
    transition: none;
  }
}