# Theme's custom CSS or design tokens disappeared after saving Appearance

**What you are seeing**

My theme's custom CSS or design tokens disappeared after saving Appearance.

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## Why it happens

The theme is replaced wholesale on save; any client that sends a partial theme wipes the fields it omits.

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## What to do

When writing the theme through the API, always send the complete theme object, not just the fields you are changing.

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## Related

[Password-protected site's sign-in button does nothingPassword sign-in needs JavaScript and modern browser crypto. With JavaScript off, the form](https://help.gocapable.com/sites/password-protected-site-s-sign-in-button-does-nothing.html)

[Everyone was signed out of my protected site at onceA platform update to the sign-in mechanism invalidates all existing sessions.](https://help.gocapable.com/sites/everyone-was-signed-out-of-my-protected-site-at-once.html)

[Other problemsThe rest of this family.](https://help.gocapable.com/sites/other-problems.html)

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