.article-floating-back {
  position: fixed;
  z-index: 1025;
  top: max(14px, env(safe-area-inset-top));
  left: max(14px, env(safe-area-inset-left));
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid #b8d0cc;
  border-radius: 50%;
  background: #f6faf7;
  box-shadow: 0 3px 14px #10344838;
  color: #115b61;
  text-decoration: none;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity .18s ease, transform .18s ease;
}
.article-floating-back svg {
  width: 30px;
  height: 30px;
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-width: 5.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.article-floating-back.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.article-floating-back:hover,
.article-floating-back:focus-visible {
  background: #e8f2ef;
  color: #103448;
}
.article-floating-back:focus-visible { outline: 3px solid #e5b839; outline-offset: 2px; }
html.article-navigation-active { overflow-x: clip; background: #e8f2ef; }
body.article-back-dragging,
body.article-back-leaving { transform: translate3d(var(--article-drag-x, 0px), 0, 0); }
body.article-back-dragging { transition: none; }
body.article-back-leaving { transition: transform .24s cubic-bezier(.22, 1, .36, 1); }
@media (prefers-reduced-motion: reduce) {
  .article-floating-back,
  body.article-back-leaving { transition: none; }
}