.platform-back-top {
  position: fixed;
  right: max(20px, env(safe-area-inset-right));
  bottom: calc(20px + env(safe-area-inset-bottom));
  z-index: 40;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 46px;
  padding: 12px 17px;
  border: 1px solid #456657;
  border-radius: 999px;
  background: #173f34;
  color: #fff;
  box-shadow: 0 4px 18px #173f3426;
  font: 600 14px/1.3 Inter, system-ui, sans-serif;
  cursor: pointer;
}
.platform-back-top[hidden] { display: none; }
.platform-back-top:hover { background: #2b5848; }
.platform-back-top:focus-visible { outline: 3px solid #d8ee9d; outline-offset: 3px; }
@media (min-width: 801px) {
  .product-hero-content { align-items: start; padding-bottom: 48px; }
  .product-hero-copy, .product-hero-preview { transform: none; }
  .product-hero h1 {
    font-size: clamp(2.5rem, 3.6vw, 3.5rem);
    font-weight: 600;
    line-height: 1.12;
    letter-spacing: -0.045em;
  }
  .product-hero h1 span { color: #183f34; }
  .product-hero h1 span::after { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html:has(.platform-back-top) { scroll-behavior: auto; }
}