Explanation
CSS controls visual design: typography, color, spacing, and component styling for polished interfaces.
Code example
css:root {
--brand: #2563eb;
--ink: #0f172a;
--surface: #f8fafc;
}
body {
margin: 0;
font-family: system-ui, sans-serif;
color: var(--ink);
background: var(--surface);
line-height: 1.6;
}
.card {
max-width: 40rem;
margin: 2rem auto;
padding: 1.5rem;
border-radius: 1rem;
background: white;
box-shadow: 0 12px 30px rgb(15 23 42 / 8%);
}Helpful resources
Exercise
Style your HTML profile with a color system, typography scale, cards, and buttons.