:root { --card-radius: 16px; }
body { background: #f6f7fb; }
.navbar-brand { font-weight: 700; letter-spacing: .2px; }
.card { border-radius: var(--card-radius); }
.table td, .table th { vertical-align: middle; }
.small-muted { color: #6c757d; font-size: .9rem; }
.preview-box { background: #fff; border: 1px solid #e8e9ef; border-radius: 16px; overflow: hidden; }