Everything important and useful to know about CSS Custom Properties. Like that they are often referred to as “CSS Variables” but that’s not their real name. A custom property is most commonly thought of as a variable in CSS. .card { --spacing: 1.2rem; padding: var(--spacing); margin-bottom: var(--spacing); } Above, --spacing is the custom property with 1.2rem as the value and var(--spacing) is the