/* Back button styles */
.back-btn{position:fixed;left:18px;top:84px;z-index:2000;display:inline-flex;align-items:center;gap:8px;
  padding:8px 12px;border-radius:999px;border:1px solid rgba(255,255,255,.22);
  background:rgba(0,0,0,.38);backdrop-filter:blur(8px);
  color:#fff;text-decoration:none;font-weight:600;font-size:14px;letter-spacing:.2px}
.back-btn:hover{transform:translateY(-1px);border-color:rgba(255,255,255,.35)}
.back-btn svg{width:18px;height:18px;flex:0 0 auto}
@media (max-width: 640px){.back-btn{left:12px;top:72px;padding:8px 10px}}