/* Estilos para o componente de cabeçalho (header)
 * Implementa: navegação fixa, menu responsivo e estados interativos
 * Adapta-se a diferentes tamanhos de tela com menu mobile
 */
 .header {
  background-color: var(--dark-light);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  width: 100%;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
}

.design-logo {
  width: 60px;
  cursor: pointer;
}

/* Controle do menu mobile */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--secondary);
  cursor: pointer;
  z-index: var(--z-header);
}

.nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--gray-100);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.nav-list li {
  margin: 0 var(--spacing-md);
  position: relative;
}

.nav-link {
  color: var(--gray-700);
  text-decoration: none;
  font-weight: 400;
  padding: var(--spacing-sm) var(--spacing-lg);
  transition: color 0.3s ease, background-color 0.3s ease;
  border-radius: var(--radius-sm);
  display: block;
}

/* Efeito de hover */
.nav-link:hover {
  color: var(--white);
  background-color: var(--accent);
}

/* Estado ativo controlado por JS com base na seção visível */
.nav-link.active {
  color: var(--white);
  background-color: var(--accent);
}

.mobile-title {
  display: none;
  font-weight: 500;
  color: var(--gray-700);
  margin: 0 0 var(--spacing-md) 0;
}

.mobile-menu-close {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--gray-700);
  cursor: pointer;
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  z-index: var(--z-header);
}

.mobile-menu-close:hover {
  color: var(--accent);
}

/* Overlay para o menu mobile */
.menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.446);
  z-index: calc(var(--z-header) - 1);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease;
}

.menu-overlay.open {
  opacity: 1;
  visibility: visible;
}

.menu-logo {
  margin: 10px;
  width: 100px;
  display: none;
}

/* Responsividade */
@media (max-width: 768px) {
  .header-content {
    padding: var(--spacing-md) 0;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 90%;
    max-width: 250px;
    height: 100vh;
    background-color: var(--white);
    z-index: var(--z-header);
    transition: right 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
    border-radius: 30px 0px 0px 30px;
  }

  .nav.open {
    right: 0;
  }

  .nav-list {
    flex-direction: column;
    padding: var(--spacing-lg);
    background-color: var(--white);
    box-shadow: none;
    width: 100%;
    align-items: center;
  }

  .nav-list li {
    margin: var(--spacing-sm) 0;
    width: 100%;
  }

  .nav-link {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: center;
    background-color: var(--gray-100);
    width: 100%;
  }

  .nav-link:hover {
    color: var(--white);
    background-color: var(--accent);
  }

  .nav-link.active {
    color: var(--white);
    background-color: var(--accent);
  }

  .mobile-title {
    display: block;
    text-align: center;
  }

  .mobile-menu-close {
    display: block;
  }

  .menu-logo {
    display: block;
  }

  body.menu-open {
    overflow: hidden;
  }
}