Barbershop
CSS Styling Manual
Universal - * tag - div (example)
ID - #header-btn (can only be used once on the page)
Class - .header-btn (using a dot)
Attribute - [type], [type="button"]
Child - .header-list > .header-link (first nesting using the equal sign)
Descendant - .header-list a (for all descendants using a space)
Utility classes (for example, one class for resetting link decorations and margins with paddings)
Attribute for links against phishing rel="noopener noreferrer nofollow"
Font Fascia
Plugin to see all font styles used in a layout in Figma at once.