.zw-dif {
  background: #eaeaea;/*var(--zw-white);*/
  color: var(--zw-dark);
  padding: clamp(2.5rem, 6vw, 4rem) 0 clamp(3rem, 7vw, 4.5rem);
}

.zw-dif__head {
  position: relative;
  isolation: isolate;
  max-width: 52rem;
  margin: 0 auto clamp(2rem, 5vw, 3rem);
  text-align: center;
}

/* Marca de agua detrás del titular; isolation en __head la mantiene sobre el fondo. */
.zw-dif__watermark {
  position: absolute;
  top: 52%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: -1;
  width: clamp(11rem, 27vw, 19rem);
  height: auto;
  max-width: 80%;
  object-fit: contain;
  opacity: 0.14;
  pointer-events: none;
  user-select: none;
}

.zw-dif__sample {
  display: block;
  width: auto;
  max-width: min(60%, 13rem);
  height: auto;
  max-height: 5.5rem;
  margin: 0 auto 0.35rem;
  object-fit: contain;
}

.zw-dif__brand {
  margin: 0;
  font-size: clamp(1.5rem, 4vw, 2.05rem);
  font-weight: var(--zw-weight-title);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--zw-orange);
}

.zw-dif__title {
  margin: 0.15rem 0 0;
  font-size: clamp(1.55rem, 4.4vw, 2.3rem);
  font-weight: var(--zw-weight-title);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--zw-dark);
}

.zw-dif__title-accent {
  position: relative;
  display: inline-block;
  padding-bottom: 0.22em;
  white-space: nowrap;
}

.zw-dif__title-accent::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: var(--zw-orange);
  border-radius: 2px;
}

.zw-dif__intro {
  margin: clamp(1rem, 2.5vw, 1.4rem) auto 0;
  max-width: 44rem;
  font-size: clamp(0.9rem, 1.9vw, 1rem);
  line-height: 1.6;
  color: #8a8a8a;
}

.zw-dif__body {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.5rem);
  align-items: center;
}

.zw-dif__col {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.75rem);
  align-content: center;
}

.zw-dif__visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.zw-dif__stage {
  position: relative;
  width: 100%;
  max-width: 24rem;
}

.zw-dif__panel {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
}

.zw-dif__panel--layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
  pointer-events: none;
  transform: scale(0.97);
}

@media (prefers-reduced-motion: no-preference) {
  .zw-dif__panel--layer {
    transition: opacity 420ms var(--zw-ease), transform 420ms var(--zw-ease);
  }
}

.zw-dif__panel--layer.is-in {
  opacity: 1;
  transform: none;
}

.zw-dif__item {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(0.85rem, 2vw, 1.15rem);
  align-items: start;
  cursor: pointer;
}

.zw-dif__trigger {
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  font: inherit;
  line-height: 0;
}

/* Toda la fila es pulsable: el área del botón cubre el ítem. */
.zw-dif__trigger::after {
  content: '';
  position: absolute;
  inset: 0;
}

.zw-dif__trigger:focus-visible {
  outline: 2px solid var(--zw-orange);
  outline-offset: 4px;
  border-radius: 999px;
}

.zw-dif__icon {
  width: clamp(3.25rem, 7vw, 4.15rem);
  height: clamp(3.25rem, 7vw, 4.15rem);
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #9a9a9a;
  color: var(--zw-white);
  transition: background-color 300ms var(--zw-ease);
}

.zw-dif__icon svg,
.zw-dif__icon img {
  width: 58%;
  height: 58%;
  display: block;
  object-fit: contain;
}

.zw-dif__item.is-active .zw-dif__icon,
.zw-dif__item:hover .zw-dif__icon,
.zw-dif__item:focus-within .zw-dif__icon {
  background: var(--zw-orange);
}

.zw-dif__item-title {
  margin: 0.2rem 0 0.3rem;
  font-size: clamp(1.02rem, 2.1vw, 1.18rem);
  font-weight: var(--zw-weight-title);
  line-height: 1.2;
  color: #8f8f8f;
  transition: color 300ms var(--zw-ease);
}

.zw-dif__item.is-active .zw-dif__item-title,
.zw-dif__item:hover .zw-dif__item-title,
.zw-dif__item:focus-within .zw-dif__item-title {
  color: var(--zw-dark);
}

.zw-dif__item-text {
  margin: 0;
  font-size: clamp(0.86rem, 1.8vw, 0.95rem);
  line-height: 1.5;
  color: #8e8e8e;
  font-weight: 100;
}

@media (min-width: 960px) {
  .zw-dif__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr) minmax(0, 1fr);
    gap: clamp(1.25rem, 3vw, 2.25rem);
  }

  .zw-dif__stage {
    max-width: 100%;
  }
}

@media (max-width: 959px) {
  .zw-dif__head {
    margin-bottom: clamp(1.35rem, 4vw, 1.85rem);
  }

  .zw-dif__body {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.35rem;
  }

  .zw-dif__col {
    max-width: 30rem;
    margin-inline: auto;
    width: 100%;
    gap: 1.15rem;
  }

  /* Sándwich: Speed/Comfort → diagrama → Smart/Easy. El orden del HTML ya es ese. */
  .zw-dif__visual {
    margin-block: 0.15rem;
  }

  .zw-dif__stage {
    max-width: min(19.5rem, 88%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .zw-dif__icon,
  .zw-dif__item-title,
  .zw-dif__panel--layer {
    transition: none;
  }

  .zw-dif__panel--layer {
    transform: none;
  }
}