Layout with CSS Grid
CSS Grid is the most powerful layout system we have on the web today. A well-crafted grid lets you describe two-dimensional layouts declaratively, without fighting floats or clearing after every row.
Start by defining your grid template, then place items with line numbers or named areas. Keeping track of rows and columns as named areas makes the intent of the layout readable at a glance.
Flexbox for the details
Where Grid handles the overall page structure, Flexbox shines for distributing space along a single axis. Alignment, ordering, and growing or shrinking all become a one-liner.
Combine both systems rather than treating them as rivals. Grid for the macro layout, flexbox for the micro-interactions and component internals.
Custom properties as design tokens
CSS custom properties turn a stylesheet into a system. Centralize colors, spacing, and typography scale in one place, then reference them everywhere. They also cascade, so you get theming for free.
Because custom properties resolve at computed-value time, they can be animated and swapped without invalidating the whole style tree. That makes them ideal for theming and component variants.
Finishing thoughts
Modern CSS is fast, expressive, and worth leaning into. Grid, flexbox, and custom properties alone can replace a surprising amount of JavaScript.
Go slow, build small demos, and measure how each technique behaves in your browser of choice.