I’m using the minimal mistakes github pages starter (https://github.com/mmistakes/mm-github-pages-starter) and I’ve built the site locally. Everything seems fine so far but I can’t make .css code to work (I’m a total newbie with html/css). I want to be able to center images and preview them locally. I tried creating a main.scss/main.css file in the /assets folder. I copied the /_sass folder from the original minimal mistakes theme and tried adding the css code there at the minimal-mistakes.scss file. I’ve also tried to create a custom.css file and add the css code there, to no sucess.