CSS3

CSS gives HTML its look colors, spacing, layout, fonts, motion. Think of HTML as a house's structure and CSS as everything that makes it feel like YOUR house: paint, furniture arrangement, lighting. There are three ways to write CSS: inline (directly on a tag), internal (inside a <style> tag), and external (a separate .css file linked to your HTML) real projects almost always use external, because it keeps design separate from structure and can style an entire site from one file. Every topic here shows all three methods side by side, so you know exactly how each is written and when to reach for it, going from the basics of color and spacing all the way to layout systems and animation used in real, professional websites.