Form Submit button size

Site URL: https://www.scastillo.com/contact

In the form of my website the submit button appears like a huge black button. How can I fix this? I deleted the from and added it again but  it din't work.

Thanks

https://www.scastillo.com/contact

Try going to Site Styles > Find button...

Or you can add this to Home > Design > Custom CSS to fix temporarily

input.button.sqs-system-button.sqs-editable-button {
    padding: 1em;
}