.developer-portal-return {
  position: fixed;
  top: max(16px, env(safe-area-inset-top));
  right: max(16px, env(safe-area-inset-right));
  z-index: 2147483647;
  padding: 12px 18px;
  border: 1px solid #8eacff;
  border-radius: 10px;
  background: #162544;
  color: #fff;
  font: 600 15px/1.4 system-ui, sans-serif;
  text-decoration: none;
  box-shadow: 0 3px 16px #0005;
}
.developer-portal-return:focus-visible { outline: 3px solid #fff; outline-offset: 3px; }