/* ==========================================================================
   HEADER — Navegação principal
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  height: 72px;
  display: flex;
  align-items: center;
  background-color: rgba(19, 19, 19, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background-color var(--transition);
}

.site-header.is-scrolled {
  background-color: rgba(19, 19, 19, 0.97);
  border-color: var(--color-outline-variant);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  width: 100%;
}

/* ── Logo ───────────────────────────────────────────────────────────────────── */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo img {
  height: 54px;
  width: auto;
}

.site-logo__text {
  font-family: var(--font-headline);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-on-surface);
  line-height: 1.1;
}

.site-logo__text span {
  color: var(--color-primary-container);
}

/* ── Nav principal ───────────────────────────────────────────────────────────── */
.primary-nav--desktop {
  display: flex;
  align-items: center;
  gap: 0;
}

.primary-nav--mobile {
  display: none;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: 0;
}

.primary-nav__list > li {
  position: relative;
}

.primary-nav__list > li > a {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-on-surface-variant);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.primary-nav__list > li > a:hover,
.primary-nav__list > li.current-menu-item > a,
.primary-nav__list > li.current-menu-ancestor > a {
  color: var(--color-primary-container);
}

.primary-nav__list > li.current-menu-item > a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: var(--space-4);
  right: var(--space-4);
  height: 2px;
  background-color: var(--color-primary-container);
  border-radius: var(--radius-full);
}

/* Botão chevron do submenu: oculto no desktop */
.submenu-chevron-btn {
  display: none;
}

/* ── Sub-menu (dropdown) ─────────────────────────────────────────────────────── */
.primary-nav__list .sub-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  background-color: var(--color-surface-container);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  padding: var(--space-2);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
  z-index: var(--z-overlay);
}

.primary-nav__list li:hover > .sub-menu,
.primary-nav__list li:focus-within > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.primary-nav__list .sub-menu a {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-on-surface-variant);
  border-radius: var(--radius);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.primary-nav__list .sub-menu a:hover {
  background-color: var(--color-surface-high);
  color: var(--color-primary-container);
}

/* ── CTA no header ───────────────────────────────────────────────────────────── */
.header-cta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* ── Mobile toggle ───────────────────────────────────────────────────────────── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--space-2);
  cursor: pointer;
  background: none;
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius);
  transition: border-color var(--transition-fast);
}

.nav-toggle:hover {
  border-color: var(--color-primary-container);
}

.nav-toggle__line {
  display: block;
  width: 100%;
  height: 1.5px;
  background-color: var(--color-on-surface);
  border-radius: var(--radius-full);
  transform-origin: center;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.is-active .nav-toggle__line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-toggle.is-active .nav-toggle__line:nth-child(2) {
  opacity: 0;
}
.nav-toggle.is-active .nav-toggle__line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ── Responsive ──────────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .nav-toggle {
    display: flex;
  }

  .primary-nav--desktop {
    display: none;
  }

  /* Painel principal mobile */
  .primary-nav--mobile {
    display: flex;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    width: 100%;
    height: calc(100vh - 72px);
    height: calc(100dvh - 72px);
    background-color: var(--color-surface-low);
    border-top: 1px solid var(--color-outline-variant);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-6) var(--space-4);
    overflow: hidden;
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: var(--z-modal);
  }

  .primary-nav--mobile.is-open {
    transform: translateX(0);
  }

  /* Quando subpainel está aberto, desliza o conteúdo principal para a esquerda */
  .primary-nav--mobile.nav--sub-open > .primary-nav__list,
  .primary-nav--mobile.nav--sub-open > .header-cta {
    transform: translateX(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }

  .primary-nav--mobile > .primary-nav__list,
  .primary-nav--mobile > .header-cta {
    transition: transform var(--transition), opacity var(--transition);
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
    flex: 1;
    overflow-y: auto;
  }

  .primary-nav__list > li > a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--text-base);
    padding: var(--space-4);
    border-radius: var(--radius);
    border: none;
  }

  .primary-nav__list > li > a:hover {
    background-color: var(--color-surface-container);
  }

  .primary-nav__list > li.current-menu-item > a,
  .primary-nav__list > li.current-menu-ancestor > a {
    color: var(--color-primary-container);
  }

  /* Esconde sub-menu no mobile (exibido via painel secundário) */
  .primary-nav__list .sub-menu {
    display: none;
  }

  /* Oculta o indicador keyboard_arrow_down no mobile */
  .primary-nav__list > li.menu-item-has-children > a .submenu-indicator {
    display: none;
  }

  /* Item pai: flex para alinhar link + botão chevron */
  .primary-nav__list > li.menu-item-has-children {
    display: flex;
    align-items: center;
  }

  .primary-nav__list > li.menu-item-has-children > a {
    flex: 1;
  }

  /* Botão chevron dedicado (só mobile) */
  .submenu-chevron-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    flex-shrink: 0;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-on-surface-variant);
    border-radius: var(--radius);
    transition: color var(--transition-fast), background-color var(--transition-fast);
  }

  .submenu-chevron-btn:hover {
    background-color: var(--color-surface-container);
    color: var(--color-primary-container);
  }

  .submenu-chevron-btn .material-symbols-outlined {
    font-size: 1.4rem;
    line-height: 1;
  }

  .header-cta {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-outline-variant);
    flex-shrink: 0;
    flex-direction: row;
  }

  .header-cta .btn {
    flex: 1;
    justify-content: center;
  }

  /* ── Painel secundário (segunda tela de submenu) ──────────────────────────── */
  .nav-sub-panel {
    position: absolute;
    inset: 0;
    background-color: var(--color-surface-low);
    display: flex;
    flex-direction: column;
    padding: var(--space-4);
    transform: translateX(100%);
    transition: transform var(--transition);
    overflow-y: auto;
    z-index: 1;
  }

  .nav-sub-panel.is-visible {
    transform: translateX(0);
  }

  /* Botão voltar */
  .nav-sub-panel__back {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-on-surface-variant);
    font-size: var(--text-sm);
    font-family: var(--font-body);
    padding: var(--space-3) var(--space-2);
    border-radius: var(--radius);
    margin-bottom: var(--space-4);
    align-self: flex-start;
    transition: color var(--transition-fast), background-color var(--transition-fast);
  }

  .nav-sub-panel__back:hover {
    color: var(--color-primary-container);
    background-color: var(--color-surface-container);
  }

  .nav-sub-panel__back .material-symbols-outlined {
    font-size: 1.2rem;
  }

  .nav-sub-panel__back-label {
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: var(--text-xs);
    font-weight: 600;
  }

  /* Lista de itens do submenu */
  .nav-sub-panel__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    flex: 1;
  }

  .nav-sub-panel__list a {
    display: block;
    padding: var(--space-4);
    font-size: var(--text-base);
    color: var(--color-on-surface);
    border-radius: var(--radius);
    transition: background-color var(--transition-fast), color var(--transition-fast);
  }

  .nav-sub-panel__list a:hover {
    background-color: var(--color-surface-container);
    color: var(--color-primary-container);
  }

  /* Botões CTA no fundo do painel — lado a lado igual ao painel principal */
  .nav-sub-panel__cta {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-outline-variant);
    display: flex;
    flex-direction: row;
    gap: var(--space-3);
  }

  .nav-sub-panel__cta .btn {
    flex: 1;
    justify-content: center;
  }
}

/* Offset do conteúdo pelo header fixo */
.header-offset {
  padding-top: 72px;
}