.qr-card { transition: .2s ease; }
.qr-card:hover { transform: translateY(-2px); box-shadow: 0 .5rem 1rem rgba(0,0,0,.08); }
.qr-preview { min-height: 220px; display:flex; align-items:center; justify-content:center; background:#fff; border:1px solid #eee; border-radius:12px; padding:16px; }
.stat-card { border:0; border-radius:14px; }
.hero { border-radius:20px; }