/*
 * Correção isolada do cabeçalho.
 * A tarja SEO permanece no fluxo; o menu gruda no topo sem reservar espaço ao rolar.
 */
.header {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  width: 100%;
  margin-top: 0 !important;
  padding: 14px 0 !important;
  background-color: rgba(11, 12, 14, 0.96);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-100%);
  transition: opacity .35s var(--ease-premium), transform .35s var(--ease-premium), visibility 0s linear .35s;
}

.header.header-scrolled {
  top: 0 !important;
  padding: 14px 0 !important;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  transition-delay: 0s;
}

@media (prefers-reduced-motion: reduce) {
  .header {
    transition-duration: 0.01ms;
  }
}