/* ============================================================
   DELTA LOGÍSTICA — VOLVER ARRIBA
   Réplica exacta del botón usado en index.php
   ============================================================ */

.back-to-top{
  position:fixed;
  bottom:28px;
  right:28px;
  z-index:999;
  width:46px;
  height:46px;
  border-radius:50%;
  background:#000099;
  color:#fff;
  border:none;
  font-size:16px;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  pointer-events:none;
  transform:translateY(20px);
  transition:opacity .3s,transform .3s,visibility .3s;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 4px 20px rgba(0,0,153,.4);
}

.back-to-top.is-visible{
  opacity:1;
  visibility:visible;
  pointer-events:auto;
  transform:translateY(0);
}

.back-to-top:hover{
  background:#0000cc;
  transform:translateY(-2px);
}

.back-to-top:focus-visible{
  outline:3px solid rgba(216,0,29,.35);
  outline-offset:3px;
}

.cookie-notice.is-visible ~ .back-to-top{
  opacity:0!important;
  visibility:hidden!important;
  pointer-events:none!important;
}

@media(prefers-reduced-motion:reduce){
  .back-to-top{transition:none}
}