/* ===== 5 Principi della Salute ===== */
.principi {
  padding: var(--stack-lg) 0;
  background: var(--color-surface);
}

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

.principi__title {
  font-size: var(--headline-lg-size);
  line-height: var(--headline-lg-line);
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 12px;
}

.principi__intro {
  max-width: 680px;
  margin: 0 auto 40px;
  color: var(--color-on-surface-variant);
  font-size: var(--body-lg-size);
  line-height: var(--body-lg-line);
  text-align: center;
}

.principi__percorso {
  position: relative;
  max-width: 760px;
  margin-inline: auto;
  list-style: none;
}

.principi__percorso::before {
  content: '';
  position: absolute;
  top: 28px;
  bottom: 28px;
  left: 27px;
  width: 2px;
  background: linear-gradient(
    to bottom,
    var(--color-primary),
    var(--color-saffron-energetic),
    var(--color-tertiary)
  );
}

.principi__tappa {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 20px;
  padding-bottom: 32px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.principi__tappa:last-child {
  padding-bottom: 0;
}

.principi__tappa.is-inview {
  opacity: 1;
  transform: translateY(0);
}

.principi__tappa:nth-child(2) { transition-delay: 0.2s; }
.principi__tappa:nth-child(3) { transition-delay: 0.4s; }
.principi__tappa:nth-child(4) { transition-delay: 0.6s; }
.principi__tappa:nth-child(5) { transition-delay: 0.8s; }

.principi__marker {
  position: relative;
  z-index: 1;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid currentColor;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.principi__content {
  padding-top: 4px;
}

.principi__label {
  margin-bottom: 6px;
  color: var(--color-on-surface);
  font-family: var(--font-sans);
  font-size: var(--body-lg-size);
  line-height: var(--body-lg-line);
  font-weight: var(--label-md-weight);
}

.principi__text {
  color: var(--color-on-surface-variant);
  line-height: 1.6;
}

.principi__tappa--respiro .principi__marker {
  color: var(--color-saffron-energetic);
}

.principi__tappa--relax .principi__marker {
  color: var(--color-spiritual-blue-deep);
}

.principi__tappa--alimentazione .principi__marker {
  color: var(--color-secondary);
}

.principi__tappa--pensiero .principi__marker {
  color: var(--color-tertiary);
}

@media (prefers-reduced-motion: reduce) {
  .principi__tappa {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

@media (min-width: 768px) {
  .principi__intro {
    margin-bottom: 48px;
  }

  .principi__percorso {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 24px;
    max-width: none;
  }

  .principi__percorso::before {
    top: 27px;
    right: 10%;
    bottom: auto;
    left: 10%;
    width: auto;
    height: 2px;
    background: linear-gradient(
      to right,
      var(--color-primary),
      var(--color-saffron-energetic),
      var(--color-tertiary)
    );
  }

  .principi__tappa {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding-bottom: 0;
    text-align: center;
  }

  .principi__content {
    padding-top: 0;
  }
}