Thoughts
CSS pro-tip:
```
body {
position: absolute;
}
```
By default the body is just another block-displayed element. In some cases it can be
"pushed around" by other elements and margin and stuff. To avoid this, and achieve what I think is intuitive behavior for what is frequently used as a generic outermost container, position it absolutely. This takes it out of the normal page flow, and locks it in place.