|
|
|
|
|
|
by postmodest
720 days ago
|
|
|
The circular reference is because em and ex are relative to the font size of the surrounding context, and you need to pick a physical (or derivable-from-physical) unit for the root context. em and ex always refer to the M and x height because that's how fonts work in the old "lead type" world. |
|
|