header{background-color:#007bff;color:#fff}.container,header{padding:20px;text-align:center}img.logo{max-width:100%;height:auto}button{background-color:#007bff;color:#fff;border:none;padding:10px 20px;text-align:center;text-decoration:none;display:inline-block;font-size:16px;margin:4px 2px;cursor:pointer;border-radius:5px}