.circle{display:inline-block;width:50px;height:50px;line-height:50px;margin:5px;text-align:center;font-size:20px;font-weight:700;border-radius:50%;background-color:#f0f0f0;border:2px solid #333;color:#333}h2{font-size:24px;color:#444}button{margin:10px;padding:10px 20px;font-size:16px;cursor:pointer}