.ad-placeholder{align-items:center;background:#f0f0f0;border:2px dashed #ccc;border-radius:8px;color:#999;display:flex;font-size:14px;justify-content:center;min-height:250px;padding:2rem 1rem;text-align:center}@media (max-width:991px){.sidebar{margin-top:2rem}}@media (max-width:768px){.sidebar{margin-top:1.5rem}}