/* Header-specific styles for  " ... AD ASTRA " Joanna Gołębiewska */
.header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(247, 241, 236, 0.96), rgba(247, 241, 236, 0.86));
  border-bottom: 1px solid rgba(199, 177, 165, 0.4);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  position: relative;
}

/* Site logo */
.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.25rem 0.9rem;
  border-radius: var(--radius-pill);
  background: radial-gradient(circle at 0 0, rgba(216, 156, 166, 0.18), transparent 55%),
              radial-gradient(circle at 100% 100%, rgba(212, 181, 127, 0.18), transparent 55%);
  box-shadow: 0 10px 28px rgba(60, 38, 30, 0.16);
}

.site-logo__mark {
  width: 2.15rem;
  height: 2.15rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--color-primary), #e4b9c0);
  color: #fffaf5;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
}

.site-logo__text {
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-800);
  white-space: nowrap;
}

/* Navigation base (desktop first, mobile JS-enhanced) */
.nav-centered {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  column-gap: var(--space-8);
}

.nav-centered__menu {
  display: flex;
  align-items: center;
}

.nav-centered__menu--left,
.nav-centered__menu--right {
  gap: var(--space-4);
}

.nav-link {
  font-size: var(--font-size-sm);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-600);
  padding-bottom: 0.25rem;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast), opacity var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-text);
  border-color: rgba(212, 181, 127, 0.9);
}

.nav-link--active {
  color: var(--color-text);
  border-color: rgba(216, 156, 166, 0.95);
}

.nav-link--cta {
  padding-inline: 0.15rem;
}

.nav-link--cta::after {
  content: "";
  display: block;
  height: 1px;
  margin-top: 0.15rem;
  background: linear-gradient(90deg, rgba(216, 156, 166, 0.2), rgba(212, 181, 127, 0.95));
  transform-origin: left;
  transform: scaleX(0.6);
  transition: transform var(--transition-normal);
}

.nav-link--cta:hover::after,
.nav-link--cta:focus-visible::after {
  transform: scaleX(1);
}

/* Mobile toggle button */
.header__menu-toggle {
  position: absolute;
  left: 0;
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 999px;
  border: 1px solid rgba(199, 177, 165, 0.7);
  background: rgba(255, 252, 248, 0.96);
  cursor: pointer;
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.header__menu-toggle-line {
  width: 1.25rem;
  height: 1px;
  background: var(--gray-700);
  border-radius: 999px;
  transition: transform var(--transition-fast), opacity var(--transition-fast), background-color var(--transition-fast);
}

.header__menu-toggle-line + .header__menu-toggle-line {
  margin-top: 0.3rem;
}

.header__menu-toggle:focus-visible {
  outline: 2px solid var(--color-accent-gold);
  outline-offset: 3px;
}

.header__menu-toggle.is-open {
  box-shadow: 0 16px 30px rgba(56, 38, 30, 0.18);
}

.header__menu-toggle.is-open .header__menu-toggle-line:first-child {
  transform: translateY(0.3rem) rotate(45deg);
}

.header__menu-toggle.is-open .header__menu-toggle-line:last-child {
  transform: translateY(-0.3rem) rotate(-45deg);
}

/* Mobile layout */
@media (max-width: 768px) {
  .header__inner {
    justify-content: center;
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }

  .header__menu-toggle {
    display: inline-flex;
    flex-direction: column;
    top: 20px;
    z-index: 9999;
  }

  .nav-centered {
    position: fixed;
    inset-inline: 0;
    top: 0;
    padding: 4.25rem var(--space-4) var(--space-6);
    background: linear-gradient(to bottom, rgba(247, 241, 236, 0.98), rgba(247, 241, 236, 0.96));
    border-bottom: 1px solid rgba(199, 177, 165, 0.5);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), transform var(--transition-normal), visibility var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
  }

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

  .nav-centered__logo {
    order: -1;
  }

  .nav-centered__menu--left,
  .nav-centered__menu--right {
    flex-direction: column;
    gap: var(--space-3);
  }

  .nav-link {
    font-size: 0.78rem;
    text-align: center;
  }
}

@media (min-width: 769px) {
  .nav-centered {
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
    position: static;
    padding: 0;
    background: transparent;
    border: 0;
  }
}