/* =========================================================
   Component — Header / Navegação principal
   ========================================================= */

.site-header {
  position: absolute;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: var(--z-sticky);
  padding-block: var(--space-5);
  color: var(--text-inverse);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: inherit;
}

/* Logo principal "Arts by Cambur" (assets/logo/arts-logo.svg) */
.brand__logo {
  height: clamp(2.25rem, 3vw, 2.75rem);
  width: auto;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-5), 3vw, var(--space-8));
}

/* Lista de seções: só aparece no overlay mobile (ver media query abaixo) */
.primary-nav__sections { display: none; }

.primary-nav__link {
  position: relative;
  font-size: var(--fs-sm);
  font-weight: var(--fw-regular);
  letter-spacing: var(--ls-wide);
  padding-block: var(--space-2);
  transition: opacity var(--dur-base) var(--ease-std);
}

.primary-nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-base) var(--ease-out);
}
.primary-nav__link:hover::after,
.primary-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  flex-direction: column;          /* as 3 barras empilhadas (e não em linha) */
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 2.5rem; height: 2.5rem;
  color: inherit;
}
.nav-toggle__bar {
  display: block;
  width: 22px; height: 1.5px;
  background: currentColor;
  transition: transform var(--dur-base) var(--ease-std),
              opacity var(--dur-base) var(--ease-std);
}

/* Aberto → vira "X" (barra do meio some, externas giram e se cruzam) */
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

@media (max-width: 768px) {
  /* Header mobile: só o logo, centralizado (o hambúrguer foi p/ o nav de seções).
     Margin superior p/ respiro; padding inferior compacto p/ não crescer a altura. */
  .site-header { padding-block: var(--space-6) var(--space-2); }
  .site-header__inner { justify-content: center; }
  .brand__logo { height: 3.25rem; }

  .nav-toggle {
    display: flex;
    position: relative;
    z-index: calc(var(--z-modal) + 1);   /* o X fica acima do overlay p/ poder fechar */
  }

  .primary-nav {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);              /* cobre o conteúdo e a barra inferior */
    background: var(--color-night-deep);
    display: grid;
    place-items: center;
    transform: translateX(100%);
    transition: transform var(--dur-slow) var(--ease-out);
  }
  .primary-nav[data-open="true"] { transform: translateX(0); }
  .primary-nav__link { font-size: var(--fs-lg); }

  /* Mobile: hambúrguer exibe os links do NAV DE SEÇÕES (não os externos) */
  .primary-nav__list { display: none; }
  .primary-nav__sections {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
  }
}