You do not meet the exception @JotikaT2 referenced. Read the Community Property States paragraph in that reference. CA is a community property state.
Since you resided all year in CA, your income is Community Property income per California law - resulting in your wife having CA-source income. This means that you cannot file separately in CA unless you file separately on your federal return.
Note that CA uses a pro-rated method to determine a CA non-resident's CA tax. See Tax Computation Method in this reference:
https://www.ftb.ca.gov/forms/misc/1100.html
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
