Please find ‘Custom css box’ under Specular > General Options. Scroll down to ‘Tracking Code / Custom CSS / Custom JS’ section (screenshot). Every css code you write here, will be saved even in case of theme update, that’s why we strongly recommend to make all css changes here.
In Appearance > Editor, you edit the style.css file directly. The changes made here will be lost in case of a theme update (updates overwrite all theme files included style.css)
