/* ==========================================================================
   Section: Header
   Transparente sobre o hero, deixando a foto correr até o topo da tela.
   Ao rolar, vira barra branca com filete de 1px para o conteúdo não
   passar por trás. Sem pílula, sem vidro, sem sombra.
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  background-color: transparent;
  border-bottom: 1px solid transparent;
  padding-top: env(safe-area-inset-top);
  transition: background-color var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out);
}

/* Rolou: a barra materializa e separa header de conteúdo */
.site-header.is-scrolled {
  background-color: var(--surface);
  border-bottom-color: var(--line);
}

/* Menu mobile aberto: o painel é branco, então o header acompanha para a
   logo e o botão de fechar não flutuarem sobre a foto.
   Classe aplicada por JS — :has() ainda não tem suporte universal. */
.site-header.is-menu-aberto {
  background-color: var(--surface);
}

.site-header__shell {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
  height: 72px;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-left: max(var(--gutter), env(safe-area-inset-left));
  padding-right: max(var(--gutter), env(safe-area-inset-right));
}

/* --------------------------------------------------------------------------
   Marca
   -------------------------------------------------------------------------- */

.brand {
  display: inline-flex;
  align-items: center;
  flex: none;
  transition: opacity var(--dur-fast) var(--ease-out);
}

.brand:hover {
  opacity: 0.7;
}

.brand__img {
  height: 42px;
  width: auto;
}

/* --------------------------------------------------------------------------
   Navegação desktop
   -------------------------------------------------------------------------- */

.nav {
  display: none;
  margin-inline: auto;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--sp-7);
}

.nav__link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding-block: var(--sp-2);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  /* Tinta cheia: sobre a foto do hero o cinza médio perde contraste */
  color: var(--ink);
  white-space: nowrap;
  position: relative;
  transition: color var(--dur-fast) var(--ease-out);
}

/* Filete que cresce a partir da esquerda — no lugar de fundo em pílula */
.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
  width: 100%;
  background-color: var(--green-600);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-out);
}

.nav__link:hover,
.nav__item.is-open > .nav__link {
  color: var(--brand-navy);
}

.nav__link:hover::after,
.nav__item.is-open > .nav__link::after {
  transform: scaleX(1);
}

.nav__link .icone {
  width: 0.85em;
  height: 0.85em;
  color: var(--ink-3);
  transition: transform var(--dur-base) var(--ease-out);
}

.nav__item.is-open > .nav__link .icone {
  transform: rotate(180deg);
}

/* --------------------------------------------------------------------------
   Mega menu (Produtos)
   -------------------------------------------------------------------------- */

.nav__item--mega {
  position: relative;
}

.mega {
  position: absolute;
  top: calc(100% + var(--sp-5));
  left: 50%;
  width: min(660px, calc(100vw - var(--sp-8)));
  padding: var(--sp-2);
  background-color: var(--surface-panel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-panel);

  opacity: 0;
  visibility: hidden;
  transform: translate3d(-50%, -8px, 0);
  transition: opacity var(--dur-base) var(--ease-out),
    transform var(--dur-base) var(--ease-out),
    visibility var(--dur-base) var(--ease-out);
}

.nav__item--mega.is-open .mega {
  opacity: 1;
  visibility: visible;
  transform: translate3d(-50%, 0, 0);
}

/* Ponte invisível: evita que o menu feche ao atravessar o vão com o mouse */
.mega::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: calc(var(--sp-5) * -1);
  height: var(--sp-5);
}

.mega__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}

.mega__link {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  padding: var(--sp-4);
  border-radius: var(--r-md);
  transition: background-color var(--dur-fast) var(--ease-out);
}

.mega__link:hover {
  background-color: var(--mist);
}

.mega__icone {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: none;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  color: var(--brand-navy);
  transition: color var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out);
}

.mega__link:hover .mega__icone {
  color: var(--green-600);
  border-color: var(--green-200);
}

.mega__icone .icone {
  width: 18px;
  height: 18px;
}

.mega__titulo {
  display: block;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--ink);
  margin-bottom: 3px;
}

.mega__descricao {
  display: block;
  font-size: var(--fs-xs);
  line-height: 1.45;
  color: var(--ink-3);
}

/* --------------------------------------------------------------------------
   Ações do header
   -------------------------------------------------------------------------- */

.site-header__acoes {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin-left: auto;
  flex: none;
}

.site-header__tel {
  display: none;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  /* Tinta cheia: sobre a foto o cinza médio ficava em 4,65:1, sem margem
     para uma troca de imagem. */
  color: var(--ink);
}

.site-header__cta {
  display: none;
}

/* --------------------------------------------------------------------------
   Botão hambúrguer
   -------------------------------------------------------------------------- */

.nav-toggle {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-right: calc(var(--sp-3) * -1);
  color: var(--brand-navy);
}

.nav-toggle__box {
  display: block;
  position: relative;
  width: 20px;
  height: 12px;
}

.nav-toggle__bar {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background-color: currentColor;
  transition: transform var(--dur-base) var(--ease-out);
}

.nav-toggle__bar:nth-child(1) {
  top: 0;
}

.nav-toggle__bar:nth-child(2) {
  bottom: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translate3d(0, 5px, 0) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  transform: translate3d(0, -5px, 0) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Painel de navegação mobile
   -------------------------------------------------------------------------- */

.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  display: flex;
  flex-direction: column;
  padding-top: calc(var(--header-h) + var(--sp-4) + env(safe-area-inset-top));
  padding-bottom: max(var(--sp-8), env(safe-area-inset-bottom));
  padding-inline: max(var(--gutter), env(safe-area-inset-left));
  background-color: var(--surface);
  overflow-y: auto;
  overscroll-behavior: contain;

  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-base) var(--ease-out),
    visibility var(--dur-base) var(--ease-out);
}

.mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav__list {
  display: flex;
  flex-direction: column;
}

/* Cada item é uma linha separada por filete — estrutura de índice */
.mobile-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: var(--sp-5) 0;
  border-top: 1px solid var(--line);
  font-size: 1.375rem;
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-title);
  color: var(--ink);

  opacity: 0;
  transform: translate3d(0, 12px, 0);
}

.mobile-nav.is-open .mobile-nav__link {
  animation: ox-rise var(--dur-slow) var(--ease-out) forwards;
  animation-delay: calc(50ms + var(--i, 0) * 40ms);
}

.mobile-nav__link .icone {
  width: 17px;
  height: 17px;
  color: var(--ink-3);
}

/* Sublinha de categorias */
.mobile-nav__sub {
  display: flex;
  flex-direction: column;
  padding-bottom: var(--sp-3);
}

.mobile-nav__sub-link {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) 0 var(--sp-3) var(--sp-5);
  font-size: var(--fs-sm);
  font-weight: var(--fw-regular);
  color: var(--ink-2);

  opacity: 0;
  transform: translate3d(0, 12px, 0);
}

.mobile-nav.is-open .mobile-nav__sub-link {
  animation: ox-rise var(--dur-slow) var(--ease-out) forwards;
  animation-delay: calc(50ms + var(--i, 0) * 40ms);
}

.mobile-nav__sub-link .icone {
  width: 16px;
  height: 16px;
  color: var(--green-600);
}

/* Rodapé do painel: ações de conversão */
.mobile-nav__rodape {
  margin-top: auto;
  padding-top: var(--sp-8);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);

  opacity: 0;
  transform: translate3d(0, 12px, 0);
}

.mobile-nav.is-open .mobile-nav__rodape {
  animation: ox-rise var(--dur-slow) var(--ease-out) forwards;
  animation-delay: 300ms;
}

.mobile-nav__contato {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--ink-3);
}

.mobile-nav__contato .icone {
  width: 15px;
  height: 15px;
}

@media (prefers-reduced-motion: reduce) {
  .mobile-nav__link,
  .mobile-nav__sub-link,
  .mobile-nav__rodape {
    opacity: 1;
    transform: none;
    animation: none !important;
  }
}

/* ==========================================================================
   Breakpoints
   ========================================================================== */

@media (min-width: 768px) {
  .site-header__cta {
    display: inline-flex;
  }
}

@media (min-width: 1024px) {
  .site-header__shell {
    height: 80px;
  }

  .brand__img {
    height: 48px;
  }

  .nav {
    display: block;
  }

  .nav-toggle {
    display: none;
  }

  .site-header__tel {
    display: inline-flex;
  }

  .mobile-nav {
    display: none;
  }
}