.mexpo-return {
  position: fixed;
  top: max(18px, env(safe-area-inset-top));
  left: max(18px, env(safe-area-inset-left));
  z-index: 10001;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 16px;
  box-sizing: border-box;
  border: 1px solid #ba9768;
  border-radius: 8px;
  background: #3f2a1ee6;
  color: #fff4df;
  font: 14px Arial, 'Malgun Gothic', sans-serif;
  text-decoration: none;
  box-shadow: 0 3px 12px #0005;
}
.mexpo-return:hover { background: #63442cf2; }
.mexpo-return:focus-visible { outline: 2px solid #ffe198; outline-offset: 3px; }
@media (max-width: 600px) {
  .mexpo-return { left: max(10px, env(safe-area-inset-left)); padding: 0 12px; font-size: 13px; }
}