/* Back to top — Floor ICT */
.back-to-top{
  position:fixed;z-index:60;
  right:16px;bottom:20px;
  width:40px;height:40px;min-width:40px;min-height:40px;
  border-radius:999px;
  border:1px solid var(--color-line, #2a3a42);
  background:var(--bg, #0A0A0A);color:var(--paper, #f4f7f8);
  box-shadow:0 10px 28px #00000055;
  display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;padding:0;opacity:0;transform:translateY(8px);
  pointer-events:none;transition:opacity .2s ease, transform .2s ease, border-color .15s ease;
}
.back-to-top.is-visible{opacity:.9;transform:none;pointer-events:auto}
.back-to-top:hover{border-color:var(--teal, #2dd4bf);opacity:1;color:var(--teal, #2dd4bf)}
.back-to-top:focus-visible{outline:2px solid var(--teal, #2dd4bf);outline-offset:3px}
.back-to-top[hidden]{display:none!important}
@media (max-width:720px){
  .back-to-top{right:12px;bottom:18px;width:44px;height:44px}
  /* lift above cookie bar when open */
  body:has(.cookie-bar:not([hidden])) .back-to-top{bottom:110px}
}
@media (prefers-reduced-motion:reduce){
  .back-to-top{transition:none}
}