.model-section {
  padding-block: clamp(28px, 5vw, 64px);
}

.model-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.model-heading p {
  color: var(--color-text-muted);
  margin-top: 10px;
  line-height: 1.6;
  max-width: 540px;
}

.model-kicker {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.model-stage {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 24px;
  background: radial-gradient(ellipse at 50% 45%, var(--color-surface), var(--color-placeholder-bg));
}

.model-stage model-viewer {
  display: block;
  width: 100%;
  height: clamp(360px, 57vh, 620px);
  --progress-bar-color: transparent;
  --progress-bar-height: 0;
  --poster-color: transparent;
}

/* Barra de carregamento do modelo 3D oculta (slot "progress-bar" vazio no HTML). */
.model-status {
  color: var(--color-text-muted);
  font-size: 13px;
  text-align: center;
  pointer-events: none;
}

/* Carregamento: silhueta provisória + progresso real do download; some ao carregar. */
.model-loading {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 16px;
  padding: 24px;
  pointer-events: none;
  transition: opacity 200ms var(--ease-out), visibility 0s linear 200ms;
}

.model-stage.is-loaded .model-loading {
  opacity: 0;
  visibility: hidden;
}

.model-loading-shape {
  width: min(52%, 320px);
  aspect-ratio: 1;
  border-radius: 50%;
  opacity: .7;
}

.model-progress {
  width: min(40%, 180px);
  height: 3px;
  overflow: hidden;
  border-radius: 99px;
  background: var(--skeleton-base, rgb(0 0 0 / .08));
}

.model-progress span {
  display: block;
  height: 100%;
  background: var(--gradient-brand);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 200ms var(--ease-out);
}

.model-stage.is-error :is(.model-loading-shape,.model-progress) {
  display: none;
}

/* O modelo aparece suave quando termina de carregar. */
.model-stage model-viewer {
  transition: opacity 400ms var(--ease-out);
}

.model-stage:not(.is-loaded) model-viewer {
  opacity: 0;
}

@media (max-width: 767px) {
  .model-heading {
    display: block;
  }

  .model-stage {
    border-radius: 18px;
  }

  .model-stage model-viewer {
    height: 420px;
    max-height: 65svh;
  }
}