body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}input,textarea,button{border:1px solid #ccc;border-radius:4px;padding:6px 10px;font-size:14px}button{cursor:pointer}button:hover{opacity:.85}h1,h2,h3{margin:8px 0}