How to Understand and Create CSS Rules – CSS Tutorial 2025–2026
Learning how to understand and create CSS rules (also called rulesets) is the single most important skill in any CSS tutorial — CSS rules are the fundamental instructions that tell the browser exactly how to style and position HTML elements. Every color, size, spacing, font, layout, hover effect, animation, and responsive behavior on the modern web starts with a CSS rule. In this guide, you’ll write your first CSS rule, break down every single part (selector, declaration block, property, value), and see it instantly applied in the browser using your css-practice project from the previous lesson.
