.course-list{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;display:grid}.loading-indicator{text-align:center;color:#888;padding:20px}.filters{flex-wrap:wrap;gap:20px;margin-bottom:20px;font-size:1.1em;display:flex}.filters label{align-items:center;display:flex}.filters input[type=checkbox]{margin-right:10px}.filters select{margin-left:10px}.filters input[type=range]{width:150px;margin:0 10px}