body{background:#f5f7fb;font-family:Inter, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial}
.navbar-brand{font-weight:700;letter-spacing:0.6px}
.card{border-radius:12px;box-shadow:0 8px 30px rgba(17,24,39,0.06)}
.btn{border-radius:8px}
.table td, .table th{vertical-align:middle}
#couponArea img{max-width:220px;border-radius:8px}