In Lightning, we're getting some additional styles added to our body tag:

```
html body.sfdcBody {
    font-family: 'Helvetica';
    color: #3c3d3e;
    background: none transparent;
    margin: 0;
    padding: 10px 20px 0 20px;
    height: 100%;
    overflow: auto;
    -webkit-overflow-scrolling: touch;
}

```

Coming from AuraAlohaContentFrame.css.

[I raised an issue with the Lightning design guys](https://github.com/salesforce-ux/design-system/issues/74), but they tell me it's not their doing.

> 
> the AuraAlohaContentFrame.css is not related to the Lightning Design System's CSS. I'm unsure of whether that may change or not.
> 
> 
> 

We're reluctant to overwrite SF styles out of hand. 

Would anyone have any extra information on these styles and why they're taking effect?