.page-back{
  position:fixed;
  top:16px;
  left:16px;
  z-index:10001;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:10px 18px;
  border-radius:12px;
  background:rgba(255,255,255,.96);
  color:#334155;
  font-weight:800;
  font-size:14px;
  font-family:Inter,Arial,sans-serif;
  text-decoration:none;
  box-shadow:0 4px 20px rgba(0,0,0,.12);
  border:2px solid #e5e7eb;
  cursor:pointer;
  transition:.2s;
  -webkit-tap-highlight-color:transparent;
}
button.page-back{
  appearance:none;
  margin:0;
}
.page-back:hover{
  background:#fff;
  color:#4f46e5;
  border-color:#c7d2fe;
  transform:translateY(-1px);
}
@media(max-width:600px){
  .page-back{
    top:12px;
    left:12px;
    padding:8px 14px;
    font-size:13px;
  }
}