Simple and Responsive CSS Image Grid (simple, works)
Masonry style css only photo grid - Codepen challenge (fancy, scss => css)
SCSS: Syntactically Awesome Style Sheet SCSS (Sassy CSS) is a preprocessor scripting language that is a superset of CSS. It provides additional features and functionalities that are not available in regular CSS. SCSS syntax is very similar to CSS, but it allows for the use of variables, nesting, mixins, and other programming constructs. SCSS has a file extension of .scss.