Smart CSS
All the CSS on this site (and all my websites) are coded to make it incredibly simple to use custom styling sitewide.
Custom details are triggered by universal elements, like how tall a section is, what kind of page it is, or how much space is between two specific elements. Even the colors and fonts use variables, so any changes to colors, fonts, or buttons made in the Squarespace Style Editor are automatically reflected in the code—no editing or re-writing necessary!