.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}.card{border:1px solid #ddd;padding:15px;border-radius:8px;background:#fff}.overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#000c;color:#fff;display:flex;align-items:center;justify-content:center;z-index:999}button{cursor:pointer;background:#39c;color:#fff;border:none;padding:10px;border-radius:4px}button:disabled{background:#ccc}input,select{display:block;width:100%;margin-bottom:10px;padding:8px}