.back-to-top {
  position: fixed;
  z-index: 35;
  right: max(16px, calc((100vw - 1090px) / 2));
  bottom: calc(88px + env(safe-area-inset-bottom));
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, .55);
  border-radius: 50%;
  background: var(--forest, #173f34);
  color: #fff;
  box-shadow: 0 4px 18px rgba(18, 56, 46, .22);
  touch-action: manipulation;
}
.back-to-top svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.back-to-top:hover { background: #20594a; }
.back-to-top:focus-visible { outline: 3px solid #ed9a4d; outline-offset: 3px; }
.back-to-top[hidden], .age-pending .back-to-top { display: none; }