.adsbygoogle {
    margin: 20px 0;
    text-align: center;
    height: 100px;
}

.card.blue .card-header {
    background: linear-gradient(135deg, #1e90ff, #00bfff);
}

.card.green .card-header {
    background: linear-gradient(135deg, #32cd32, #98fb98);
}

.card.red .card-header {
    background: linear-gradient(135deg, #ff6347, #ff4500);
}

.card.orange .card-header {
    background: linear-gradient(135deg, #ff8c00, #ffa500);
}

.card.purple .card-header {
    background: linear-gradient(135deg, #6a11cb, #2575fc);
}