.aut-blocco {
  --rientro: calc(clamp(12px, 2.6vw, 38px) + clamp(36px, 3.6vw, 48px) + clamp(10px, 1.6vw, 24px));
  padding-block: var(--spazio-sez) 0;
}

.aut-passi {
  list-style: none;
  max-width: var(--contenitore);
  margin: 0 auto;
  padding: 0 var(--rientro);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(28px, 3.4vw, 52px) clamp(24px, 3vw, 46px);
  counter-reset: passo;
}

.aut-passo {
  position: relative;
  padding-top: clamp(14px, 1.6vw, 22px);
  border-top: 1px solid rgba(11, 80, 152, .22);
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: clamp(10px, 1vw, 16px);
  align-items: baseline;
}

.aut-passo__num {
  grid-column: 1;
  font-family: var(--font-etichette);
  font-weight: 700;
  font-size: clamp(34px, 3.9vw, 53px);
  line-height: 1;
  letter-spacing: 0;
  color: var(--blu);
}

.aut-passo__titolo {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-titoli);
  font-weight: 800;
  font-size: clamp(17px, 1.6vw, 23px);
  line-height: 1.2;
  letter-spacing: .01em;
  color: var(--blu);
}

.aut-passo p {
  grid-column: 1 / -1;
  margin: clamp(10px, 1.1vw, 16px) 0 0;
  font-size: clamp(14px, 1.15vw, 16px);
  line-height: 1.55;
  color: var(--nero);
}

.aut-passo:nth-child(2).is-visible { transition-delay: .07s; }
.aut-passo:nth-child(3).is-visible { transition-delay: .14s; }
.aut-passo:nth-child(4).is-visible { transition-delay: .21s; }
.aut-passo:nth-child(5).is-visible { transition-delay: .28s; }
.aut-passo:nth-child(6).is-visible { transition-delay: .35s; }

.aut-cassetta {
  --rientro: calc(clamp(12px, 2.6vw, 38px) + clamp(36px, 3.6vw, 48px) + clamp(10px, 1.6vw, 24px));
  padding: var(--spazio-sez) var(--rientro) clamp(56px, 7vw, 104px);
}

.aut-cassetta__riquadro {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
  max-width: calc(var(--contenitore) - 2 * var(--rientro));
  margin-inline: auto;
  padding: clamp(32px, 4.4vw, 64px);
  border-radius: var(--raggio);
  background: var(--grigio-chiaro);
}

.aut-cassetta__titolo {
  margin: 0 0 clamp(8px, 1vw, 14px);
  font-size: var(--fs-title);
  line-height: 1.15;
  color: var(--blu);
}

.aut-cassetta__testo {
  margin: 0;
  max-width: 34em;
  font-size: var(--fs-desc);
  line-height: 1.5;
}

@media (max-width: 1000px) {
  .aut-passi { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .aut-passi { padding-inline: clamp(24px, 8.3vw, 120px); }
  .aut-cassetta { padding-inline: clamp(24px, 8.3vw, 120px); }
  .aut-cassetta__riquadro { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .aut-passi { grid-template-columns: 1fr; gap: 26px; }
}

@media (prefers-reduced-motion: reduce) {
  .aut-passo.is-visible { transition-delay: 0s; }
}

@media (min-width: 1100px) {
  .hero-std--quadro.is-esploso .hero-std__media--3d model-viewer {
    margin-top: -14%;
    height: 122%;
  }
}