/**
 * NAV — Nawigacja główna + mobilne menu
 *
 * Mobile menu jest osobnym elementem poza <nav>, dzięki czemu
 * backdrop-filter na nav::before nie tworzy containing block dla menu.
 */

/* ── Nav bar ── */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: transparent;
}

/* Blur tła jako pseudoelement — nie wpływa na containing block dzieci */
.nav::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(244, 241, 234, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(107, 142, 110, 0.18);
  transition: background 0.25s ease, box-shadow 0.25s ease;
  z-index: 0;
}

.nav__inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-width-wide);
  margin-inline: auto;
  padding-inline: var(--space-8);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ── Logo ── */
.nav__logo {
  font-family: var(--font-script);
  font-size: var(--text-script-lg);
  color: var(--color-primary);
  letter-spacing: var(--tracking-normal);
  line-height: 1;
  transition: color var(--ease-fast);
  position: relative;
  z-index: 1;
}
.nav__logo:hover { color: var(--color-primary-hover); }

/* ── Desktop links ── */
.nav__links {
  display: flex;
  list-style: none;
  gap: 0;
}

.nav__links a {
  display: block;
  color: var(--color-text);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  padding: var(--space-2) var(--space-4);
  transition: color var(--ease-fast);
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: var(--space-4);
  right: var(--space-4);
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--ease-mid);
  transform-origin: left;
}

.nav__links a:hover            { color: var(--color-primary); }
.nav__links a:hover::after     { transform: scaleX(1); }

/* ── Hamburger ── */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  cursor: pointer;
  background: transparent;
  border: none;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.2s ease;
  transform-origin: center;
}

.nav__hamburger.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.is-active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav__hamburger.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }


/* ══════════════════════════════════════════════
   MOBILE MENU OVERLAY
   Osobny element poza <nav> — niezależny od backdrop-filter
══════════════════════════════════════════════ */
.mobile-menu {
  display: none; /* ukryty na desktopie */
}

@media (max-width: 900px) {

  /* Schowaj desktop linki */
  .nav__links { display: none; }

  /* Pokaż hamburger */
  .nav__hamburger { display: flex; }

  /* ── Mobile overlay ── */
  .mobile-menu {
    display: block;
    position: fixed;
    inset: 0;
    background: var(--palette-forest);
    z-index: 99; /* poniżej .nav (100), ale ponad resztą */

    /* Stan zamknięty */
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.25s ease, visibility 0.25s ease;
  }

  .mobile-menu.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .mobile-menu__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    gap: 0;
    padding-top: var(--nav-height); /* kompensacja za pasek nav */
    margin: 0;
  }

  .mobile-menu__list li {
    width: 100%;
    text-align: center;
  }

  .mobile-menu__list li + li {
    border-top: 1px solid rgba(244, 241, 234, 0.08);
  }

  .mobile-menu__list a {
    display: block;
    color: rgba(244, 241, 234, 0.82);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    padding: var(--space-4) var(--space-6);
    transition: color 0.18s ease, background 0.18s ease;
  }

  .mobile-menu__list a:hover,
  .mobile-menu__list a:focus-visible {
    color: var(--palette-cream);
    background: rgba(255, 255, 255, 0.06);
  }

  /* Nav bar ciemnieje gdy menu otwarte — X widoczny na ciemnym tle */
  body.menu-open .nav::before {
    background: var(--palette-forest);
    box-shadow: none;
  }

  /* Logo kremowe gdy menu otwarte */
  body.menu-open .nav__logo { color: var(--palette-cream); }

  /* Hamburger paski kremowe gdy menu otwarte */
  .nav__hamburger.is-active span { background: var(--palette-cream); }

  /* Zablokuj scroll pod menu */
  body.menu-open { overflow: hidden; }

}