.site-scroll-top {
  position: fixed;
  right: 1rem;
  bottom: 4.5rem;
  z-index: 54;
  width: 3rem;
  height: 3rem;
  border: 1px solid rgb(209 213 219);
  border-radius: var(--ggg-radius-btn, 9999px);
  background: rgb(249 250 251);
  color: rgb(31 41 55);
  box-shadow: 0 8px 24px rgb(0 0 0 / 0.16);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 0;
  font-size: 1.375rem;
  line-height: 1;
  transition: opacity 0.2s ease, transform 0.2s ease, filter 0.2s ease;
}

[data-theme="dark"] .site-scroll-top {
  border-color: rgb(75 85 99);
  background: rgb(31 41 55);
  color: rgb(229 231 235);
}

.site-scroll-top:hover {
  filter: brightness(1.04);
}

.site-scroll-top:active {
  filter: brightness(0.96);
}

.site-scroll-top--hidden {
  opacity: 0;
  transform: translateY(0.25rem);
  pointer-events: none;
}

.site-scroll-top i {
  display: block;
  line-height: 1;
}