body {
    font-family: 'Vazir', Tahoma, sans-serif;
    background-color: #f4f6f9;
}
.bg-gradient-primary { background: linear-gradient(135deg, #0d6efd, #6610f2); }
.bg-gradient-success { background: linear-gradient(135deg, #198754, #20c997); }
.bg-gradient-info { background: linear-gradient(135deg, #0dcaf0, #0d6efd); }
.bg-gradient-warning { background: linear-gradient(135deg, #ffc107, #fd7e14); }

.card { border-radius: 1rem; transition: transform 0.2s; }
.card:hover { transform: translateY(-3px); }
.btn { border-radius: 10px; }
.form-control { border-radius: 10px; }
#ad-result { background: #fff; padding: 20px; border-radius: 12px; box-shadow: 0 0 10px rgba(0,0,0,0.05); }