/* ==========================================================================
   Header — cabeçalho e menu de navegação principal.
   Não depende da estrutura exata do HTML: estiliza por classe.
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  width: 100%;
  background: transparent;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
}

.site-logo {
  font-size: var(--font-size-lg);
  font-weight: bold;
  color: #ffffff;
}

.site-logo__img {
  height: 128px;
  width: auto;
  display: block;
  mix-blend-mode: screen;
}

.main-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.main-nav__list {
  display: flex;
  gap: var(--space-md);
}

.main-nav__list a {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.85);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.4rem;
  line-height: 1;
  padding: 0.4rem 0.6rem;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
    z-index: 110;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(16, 12, 9, 0.97);
    padding: var(--space-md);
    transform: translateY(-110%);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    pointer-events: none;
  }

  .main-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .main-nav__list {
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
  }

  .main-nav__list a {
    font-size: 1.1rem;
  }
}