body {
    color: #1f2937;
}

.stat-card {
    border: 1px solid #e5e7eb;
    border-radius: 8px;
}

.table td,
.table th {
    vertical-align: middle;
}

.qr-preview {
    max-width: 220px;
    width: 100%;
    height: auto;
}