/* Torna su condiviso da Home, Progetti, Materiali e CV. */
@media screen {
  body.back-to-top-page {
    padding-bottom: calc(24px + env(safe-area-inset-bottom, 0px));
  }
}

.back-to-top {
  --top-background: #c5f544;
  --top-hover: #b6e536;
  --top-text: #202526;
  --top-border: #4b6510;
  position: fixed;
  left: calc(16px + env(safe-area-inset-left, 0px));
  bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  z-index: 10;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--top-border);
  border-radius: 0;
  background: var(--top-background);
  color: var(--top-text);
  cursor: pointer;
  appearance: none;
  transition: background-color .2s, transform .18s;
}

:root[data-theme="dark"] .back-to-top {
  --top-border: #c5f544;
}

:root[data-theme="eva01"] .back-to-top {
  --top-background: #e8790c;
  --top-hover: #f58a20;
  --top-text: #000000;
  --top-border: #e8790c;
}

.back-to-top:is(:hover, :focus-visible) {
  background: var(--top-hover);
  color: var(--top-text);
}

:root[data-theme] .back-to-top:focus-visible {
  outline: 2px solid var(--top-border);
  outline-offset: 4px;
}

.back-to-top:active { transform: scale(.98); }
.back-to-top svg { display: block; width: 20px; height: 20px; }

@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  .back-to-top { transition: none; }
}

@media print {
  .back-to-top { display: none; }
}