/* Scroll-to-top button */
.scroll-top{
  position:fixed; right:1rem; bottom:1rem; z-index:1050;
  opacity:0; transform:translateY(12px); pointer-events:none;
  transition:opacity .25s ease, transform .25s ease;
  border-radius:5px; width:3rem; height:3rem; padding:0; display:inline-flex; align-items:center; justify-content:center;
}
.scroll-top .bi{ font-size:1.25rem }
.scroll-top.visible{ opacity:1; transform:none; pointer-events:auto }
/* Colores de fondo/hover vienen de .btn-accent */
@media (min-width: 992px){ .scroll-top{ right:1.25rem; bottom:1.25rem } }