/* ==========================================================================
   iDARIS — Header / Nawigacja
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  padding-block: 1.4rem;
  transition: padding var(--dur-base) var(--ease-premium),
    background var(--dur-base) var(--ease-premium),
    border-color var(--dur-base) var(--ease-premium),
    box-shadow var(--dur-base) var(--ease-premium);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  padding-block: 0.85rem;
  background: rgba(10, 10, 11, 0.78);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--border-hairline);
  box-shadow: 0 10px 30px -20px rgba(0, 0, 0, 0.8);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.logo svg {
  width: 30px;
  height: 30px;
  color: var(--c-red-bright);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
}

.main-nav__list {
  display: flex;
  gap: var(--sp-4);
}

.main-nav__list a {
  position: relative;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding-bottom: 4px;
  transition: color var(--dur-fast) var(--ease-out);
}

.main-nav__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1.5px;
  width: 0;
  background: var(--c-red-bright);
  transition: width var(--dur-base) var(--ease-premium);
}

.main-nav__list a:hover,
.main-nav__list a.is-active {
  color: var(--text-primary);
}

.main-nav__list a.is-active::after,
.main-nav__list a:hover::after {
  width: 100%;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

.site-header__actions .phone-link {
  font-size: 0.9rem;
}

/* --- Przełącznik języka (PL / EN) --- */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  border: 1px solid var(--border-hairline-strong);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.55rem;
}

.lang-switch__option {
  color: var(--text-muted);
  transition: color var(--dur-fast) var(--ease-out);
}

.lang-switch__option:hover {
  color: var(--text-primary);
}

.lang-switch__option.is-active {
  color: var(--c-red-bright);
  font-weight: 600;
}

.lang-switch__sep {
  color: var(--border-hairline-strong);
}

/* --- Hamburger (mobile) --- */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border-hairline-strong);
  border-radius: var(--radius-sm);
  background: transparent;
  position: relative;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 18px;
  height: 1.5px;
  background: var(--text-primary);
  transform: translate(-50%, -50%);
  transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
}

.nav-toggle span::before {
  transform: translate(-50%, -7px);
}

.nav-toggle span::after {
  transform: translate(-50%, 7px);
}

.nav-toggle[aria-expanded="true"] span {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] span::before {
  transform: translate(-50%, -50%) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span::after {
  transform: translate(-50%, -50%) rotate(-45deg);
}

@media (max-width: 960px) {
  .main-nav__list {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: min(320px, 80vw);
    background: var(--c-charcoal);
    border-left: 1px solid var(--border-hairline);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: var(--sp-6);
    gap: var(--sp-4);
    transform: translateX(100%);
    transition: transform var(--dur-base) var(--ease-premium);
  }

  .main-nav__list.is-open {
    transform: translateX(0);
  }

  .main-nav__list a {
    font-size: 1.05rem;
  }

  .site-header__actions .phone-link span {
    display: none;
  }

  .lang-switch {
    padding: 0.25rem 0.45rem;
    font-size: 0.72rem;
  }

  .nav-toggle {
    display: block;
  }
}