body { background-color: #f5f6f8; }
.card-stat { text-align: center; }
.card-stat .value { font-size: 2rem; font-weight: 700; }
.card-stat .label { color: #6c757d; text-transform: uppercase; font-size: .75rem; letter-spacing: .05em; }
.table-responsive { background: #fff; border-radius: .5rem; }
pre.email-preview { background: #fff; padding: 1rem; border: 1px solid #dee2e6; border-radius: .5rem; }