.scroll-top-anchor {
  width: 1px;
  height: 1px;
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
}

.scroll-top {
  width: 48px;
  height: 48px;
  padding: 0;
  position: fixed;
  right: max(22px, env(safe-area-inset-right));
  bottom: max(22px, env(safe-area-inset-bottom));
  z-index: 50;
  display: grid;
  place-items: center;
  color: #eaf7ff;
  border: 1px solid rgba(119, 223, 255, .34);
  border-radius: 15px;
  background: rgba(7, 18, 34, .82);
  box-shadow: 0 16px 42px rgba(0, 0, 0, .34), inset 0 0 20px rgba(119, 223, 255, .04);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  font: 800 20px/1 Inter, ui-sans-serif, system-ui, sans-serif;
  cursor: pointer;
  text-decoration: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(.94);
  pointer-events: none;
  transition: opacity .32s ease, visibility 0s linear .32s, transform .42s cubic-bezier(.22, 1, .36, 1), border-color .32s ease, background-color .32s ease;
}

.scroll-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
  transition-delay: 0s;
}

.scroll-top .ui-icon { width: 20px; height: 20px; }

.scroll-top:hover {
  border-color: rgba(119, 223, 255, .72);
  background: rgba(15, 40, 65, .92);
  transform: translateY(-3px) scale(1.02);
}

.scroll-top:focus-visible {
  outline: 2px solid #77dfff;
  outline-offset: 3px;
}

@media (max-width: 640px) {
  .scroll-top {
    width: 44px;
    height: 44px;
    right: max(16px, env(safe-area-inset-right));
    bottom: max(16px, env(safe-area-inset-bottom));
    border-radius: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto !important; }
  .scroll-top { transition-duration: .01ms !important; }
}