/******************************************************************
 * ================================================================
 * STYLESHEET: NAVEGAÇÃO PRINCIPAL (10-nav.css)
 * ================================================================
 * Descrição: Estilos para a barra de navegação superior, seguindo
 * o padrão retangular e com destaque na marca. As cores de
 * destaque são controladas por variáveis de '00-vars.css'.
 ******************************************************************/


/***************************************************
 * 1. ESTRUTURA GERAL DA NAVEGAÇÃO
 ***************************************************/

.site-top {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  padding: 12px 24px;
  background: transparent;
}

.nav-shell {
  width: 100%;
  max-width: 1200px;
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;

  /* Estilo visual retangular */
  background: rgba(12, 16, 28, .8);
  backdrop-filter: blur(var(--blur, 14px));
  border: 1px solid color-mix(in oklab, var(--brand) 40%, var(--border));
  border-radius: 14px;
  box-shadow: 0 0 20px rgba(0,0,0,0.5);
}


/***************************************************
 * 2. MARCA, LINKS E AÇÕES
 ***************************************************/

/* Destaque para a marca, como um botão */
.brand {
  display: flex;
  align-items: center;
  padding: .5rem 1rem;
  background-color: var(--bg);
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  transition: all 0.2s ease;
}

.brand:hover {
  background-color: color-mix(in oklab, var(--bg) 80%, var(--brand));
  color: var(--brand-light);
}

.brand__text {
  text-shadow: 0 0 8px var(--brand-glow-subtle);
}

/* Container do menu (links e ações) */
.nav__menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav__link {
  padding: .5rem .8rem;
  border-radius: 8px;
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav__link:hover {
  color: var(--text);
  background-color: rgba(255,255,255,0.05);
}

.nav__link.is-active {
  color: var(--brand-light);
}

/* Botão de Alto Contraste */
#contrastBtn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  background-color: var(--bg);
  color: var(--text);
  border: 1.5px solid var(--border);
  transition: all .2s ease;
}

#contrastBtn:hover {
  border-color: var(--brand);
  color: var(--brand-light);
}


/***************************************************
 * 3. MODO MOBILE E BREAKPOINT
 ***************************************************/

.nav__toggle {
  display: none; /* Escondido por padrão em telas grandes */
  background: transparent;
  border: 1px solid var(--brand-glow-medium);
  border-radius: 10px;
  padding: .45rem;
  cursor: pointer;
}

.nav__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  margin: 4px 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Animação para o 'X' do botão mobile */
.nav__toggle[aria-expanded="true"] .nav__bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__bar:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] .nav__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Estilos para telas de 850px ou menores */
@media (max-width: 850px) {
  /* No mobile, o menu volta a ser uma pílula compacta */
  .nav-shell {
    border-radius: 999px;
    padding: 8px 16px;
  }

  /* Remove o fundo de destaque da marca no mobile para economizar espaço */
  .brand {
    background-color: transparent;
    padding: .5rem .2rem;
  }

  .nav__menu { display: none; }
  .nav__toggle { display: block; margin-left: auto; }

  /* Estilos do menu dropdown quando aberto (via JS) */
  .nav__menu.is-open {
    display: flex;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: max-content;
    min-width: 200px;
    flex-direction: column;
    gap: 10px;
    padding: 12px 14px;
    background: rgba(12, 16, 28, .92);
    backdrop-filter: blur(14px);
    border: 1px solid var(--brand);
    border-radius: 14px;
    box-shadow: 0 8px 28px rgba(0, 0, 0, .45), 0 0 26px var(--brand-glow-medium);
    z-index: 999;
  }

  .nav__menu.is-open .nav__list {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: 8px;
  }

  .nav__menu.is-open .nav__actions {
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px solid var(--brand-glow-subtle);
    width: 100%;
  }
}


/***************************************************
 * 4. ACESSIBILIDADE
 ***************************************************/

/* Estilos para o modo de Alto Contraste (quando ativado) */
[data-contrast="high"] #contrastBtn {
  background-color: #fff;
  color: #000;
  border-color: #fff;
}

/* Desativa animações para usuários que preferem movimento reduzido */
@media (prefers-reduced-motion: reduce) {
  .brand,
  .nav__link,
  #contrastBtn,
  .nav__bar {
    transition: none !important;
  }
}