.scroll-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 100;
  background-color: #fff;
  border: 1px solid #ccc;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

.nav-tabs .nav-link {
color: #000;               /* testo nero */
border: none;              /* rimuove bordo standard */
border-radius: 1.5rem;     /* arrotonda gli angoli */
background-color: transparent;
padding: 0.5rem 1rem;
transition: background-color 0.3s ease;
}

.nav-tabs .nav-link:hover {
background-color: #f0f0f0; /* leggero effetto al passaggio del mouse */
}

.nav-tabs .nav-link.active {
background-color: #fff;    /* sfondo bianco per attivo */
color: #000;
box-shadow: 0 0 5px rgba(0,0,0,0.1); /* effetto leggero per rilievo */
}

.carousel-item img {
  height: 60vh; /* oppure usa un valore fisso come 500px */
  object-fit: contain;
  width: 100%;
}

/* Frecce NERE su DESKTOP (larghezza >= 768px) */
@media (min-width: 768px) {
  .carousel-control-prev-icon,
  .carousel-control-next-icon {
    filter: invert(1); /* da bianco a nero */
  }
}

/* Frecce BIANCHE su dispositivi piccoli (MOBILE/TABLET) */
@media (max-width: 767.98px) {
  .carousel-control-prev-icon,
  .carousel-control-next-icon {
    filter: none; /* mantiene bianco */
  }
}