.page-back-to-top {
  position: fixed;
  right: max(18px, env(safe-area-inset-right));
  bottom: calc(96px + env(safe-area-inset-bottom));
  z-index: 1000;
  border: 1px solid #fff;
  border-radius: 24px;
  padding: 12px 18px;
  min-height: 44px;
  background: #14265f;
  color: #fff;
  font: 600 14px/1.3 system-ui, sans-serif;
  box-shadow: 0 4px 16px rgba(0,0,0,.2);
  cursor: pointer;
}
.page-back-to-top[hidden] { display: none !important; }
.page-back-to-top:hover { background: #0b6675; }
.page-back-to-top:focus-visible { outline: 3px solid #f4c257; outline-offset: 3px; }