# ui.css.unknown-unit

> Talos 0.7 · Since 0.6

a unit the engine does not support

| | |
|---|---|
| Severity | `error` |

## Meaning

a unit the engine does not support

## Fix

use `ui` for sizes the player reads, `px` for hairlines and `%` of the parent; `em`, `rem`, `vw` and `vh` are refused