body{background:#f7f7f7}#app,body{margin:0;padding:0}#app{-webkit-box-sizing:border-box;box-sizing:border-box}.flex_center{-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center}.flex_center,.flex_start{display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center}.flex_start{-webkit-box-pack:start;-ms-flex-pack:start;justify-content:flex-start}.flex_end{-webkit-box-pack:end;-ms-flex-pack:end;justify-content:flex-end}.flex_around,.flex_end{display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center}.flex_around{-ms-flex-pack:distribute;justify-content:space-around}.flex_between{display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-pack:justify;-ms-flex-pack:justify;justify-content:space-between;-webkit-box-align:center;-ms-flex-align:center;align-items:center}