/* --------------------------------------------------------------------------
   3. Cabeçalho e Navegação
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background-color: rgba(1, 50, 65, 0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(247, 239, 226, 0.08);
  transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.site-header.scrolled {
  background-color: rgba(0, 34, 44, 0.98);
  border-bottom-color: rgba(247, 239, 226, 0.14);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.header-container {
  max-width: var(--max-width-content);
  height: 100%;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

/* Marca / Logotipo Oficial */
.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
}

.brand:hover {
  opacity: 0.92;
}

.brand-mark {
  width: clamp(38px, 3.2vw, 48px);
  height: auto;
  aspect-ratio: 1;
  flex-shrink: 0;
  border-radius: 11px;
  border: 1px solid rgba(98, 220, 228, 0.22);
  box-shadow:
    0 6px 18px -8px rgba(0, 0, 0, 0.75),
    0 0 0 1px rgba(1, 27, 39, 0.35) inset;
  object-fit: cover;
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.45rem;
  line-height: 1.0;
  color: var(--color-cream);
  letter-spacing: -0.02em;
}

.brand-tagline {
  font-size: 0.68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: var(--color-aqua);
  margin-top: 3px;
}

/* Menu de Navegação Desktop */
.primary-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-cream-soft);
  text-decoration: none;
  padding: 0.5rem 0.2rem;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--color-amber);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

.nav-link:hover {
  color: var(--color-cream);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link.active {
  color: var(--color-cream);
  font-weight: 600;
}

.nav-link.active::after {
  width: 100%;
  background-color: var(--color-amber);
}

/* Destaque para link de apoio */
.nav-link-cta {
  background-color: rgba(252, 174, 38, 0.12);
  color: var(--color-amber) !important;
  border: 1px solid rgba(252, 174, 38, 0.35);
  padding: 0.45rem 1.15rem;
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
}

.nav-link-cta::after {
  display: none;
}

.nav-link-cta:hover {
  background-color: var(--color-amber);
  color: var(--color-primary) !important;
  border-color: var(--color-amber);
  box-shadow: 0 2px 10px rgba(252, 174, 38, 0.3);
}

/* Botão Hambúrguer Mobile */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid rgba(247, 239, 226, 0.15);
  border-radius: var(--radius-sm);
  padding: 9px;
  cursor: pointer;
  z-index: 1001;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.menu-toggle:hover {
  background-color: rgba(247, 239, 226, 0.08);
  border-color: rgba(247, 239, 226, 0.3);
}

.hamburger-line {
  width: 100%;
  height: 2px;
  background-color: var(--color-cream);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-fast);
}

/* Estado ativo do hambúrguer */
.menu-toggle.is-active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
}
.menu-toggle.is-active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Tablets e Telas Médias (< 992px) */
@media (max-width: 991px) {
  :root {
    --header-height: 64px;
  }

  .site-header {
    height: var(--header-height);
  }

  /* Menu Hambúrguer visível */
  .menu-toggle {
    display: flex;
  }

  .primary-nav {
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    height: 0;
    background-color: rgba(1, 50, 65, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(247, 239, 226, 0.12);
    overflow: hidden;
    transition: height var(--transition-normal);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
  }

  .primary-nav.is-open {
    height: auto;
    padding: 1.75rem 2rem 2.25rem;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 1.25rem;
  }

  .nav-link {
    font-size: 1.1rem;
    padding: 0.6rem 0;
    display: block;
    text-align: center;
  }

  .nav-link::after {
    display: none;
  }

  .nav-link.active {
    color: var(--color-amber);
  }

  .nav-link-cta {
    display: block;
    text-align: center;
    padding: 0.85rem 1.5rem;
    margin-top: 0.5rem;
  }
}

/* Celulares (Telas Menores < 640px) */
@media (max-width: 639px) {
  .header-container {
    padding: 0 1.25rem;
  }

  .brand {
    gap: 0.65rem;
  }

  .brand-mark {
    width: 36px;
    border-radius: 9px;
  }

  .brand-name {
    font-size: 1.15rem;
  }

  .brand-tagline {
    font-size: 0.6rem;
  }

}