/* ==========================================================================
   Utilitários compartilhados por todas as dobras
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.section {
  padding-block: var(--space-3xl);
  position: relative;
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.section-header {
  max-width: 720px;
  margin-bottom: var(--space-xl);
}

.section-header--center {
  margin-inline: auto;
  text-align: center;
}

/* Placeholder de imagem — substituir por asset real do cliente */
.img-placeholder {
  position: relative;
  aspect-ratio: var(--ratio, 1 / 1);
  width: 100%;
  overflow: hidden;
  background: linear-gradient(150deg, var(--color-surface) 0%, var(--color-bg-alt) 55%, var(--color-wood) 130%);
  display: flex;
  align-items: flex-end;
}

.img-placeholder span {
  padding: var(--space-sm);
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

@media (max-width: 640px) {
  .section {
    padding-block: var(--space-2xl);
  }
}