Remove "panel" class from div surrounding form, change body background color to $vapor in scss partial.
Move instructions div to sidebar, merging the instructions with the legend. Refactor form, reducing number of columns of surrounding div, wrapping form inputs in row. This keeps the input form field to 6 columns, while putting the input button on the same row.
Moved legend and instructions together in a single div, now a panel spanning width of body above visualization and sidebar. Removed panel class from #detail sidebar.
Style svg "text" elements in data_viz js by styling font size to fit to bubble radius. Move text-anchor styling to css.

 - Font-size is set to the smaller of two values: twice the radius, or else in relation to the predicted length of the text compared to the radius of the circle.
 - Set text-anchor to "middle" to center the text in the bubble in css file.