body{font-family:Arial,sans-serif;max-width:800px;margin:0 auto;padding:1rem}h1{text-align:center}#buttons-filter button{margin:5px;padding:10px;border-radius:5px;border:1px solid #000;cursor:pointer}#buttons-filter button:hover{background-color:#d3d3d3}#buttons-filter button.clicked{background-color:gray;color:#fff}a{color:blue;text-decoration:underline}a:hover{color:#00008b}.row{display:flex;flex-direction:row}.row>div{flex-wrap:wrap;margin-right:5px}