body{font-family:Arial,Helvetica,sans-serif;background:#f7f7f7;color:#333;margin:0;padding:20px;display:flex;align-items:center;justify-content:center;min-height:100vh}
.container{max-width:800px;width:100%;background:#fff;padding:24px;border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,.06);text-align:center}
.qr-grid{display:flex;gap:24px;flex-wrap:wrap;justify-content:center;margin-top:16px}
.qr-item{display:flex;flex-direction:column;align-items:center}
.qr-item img{max-width:320px;width:100%;height:auto;border:1px solid #e6e6e6;padding:8px;border-radius:6px;background:#fff}
.qr-item figcaption{margin-top:8px;font-size:14px;color:#444}

.qr-placeholder{max-width:320px;width:100%;height:320px;border-radius:6px;background:#fff;display:flex;align-items:center;justify-content:center}
.qr-placeholder-inner{display:flex;flex-direction:column;align-items:center;justify-content:center;border:2px dashed #eee;padding:28px;border-radius:6px;width:90%;height:90%;box-sizing:border-box;background:linear-gradient(180deg,rgba(255,255,255,0.9),rgba(255,255,255,0.95))}
.qr-placeholder-inner svg{opacity:0.9}
.qr-placeholder-text{margin-top:10px;color:#9aa0a6;font-size:14px}