.ad-box {
    background: #ffffff;
    border: 1px solid #cbd3e3;
    border-radius: 10px;
    padding: 16px;
    min-height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 0.9rem;
    color: #555;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}