body { background:#f4f6fb; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.card-header { font-weight:600; background:#fafbfd; }
.balance-card .balance-amount { font-size:1.6rem; font-weight:700; }
pre { white-space: pre-wrap; word-break: break-all; max-height: 400px; overflow:auto; }
.qr-img { max-width: 320px; image-rendering: pixelated; border: 8px solid #fff; box-shadow:0 4px 18px rgba(0,0,0,.12); border-radius:8px; }
.toast { min-width:280px; }
table.small td, table.small th { font-size: .85rem; }
.tab-pane .card-header i { margin-right:.4rem; }
.copy-btn { cursor:pointer; }