CSS3 development services
Modern CSS does work that used to require JavaScript — layout, animation, theming and responsive behaviour. Getting it right is the difference between a site that feels smooth and one that feels heavy.
Where we use CSS3
CSS3 is part of the stack on these 3 services. Each page covers how we work, what you get and what it costs to start.
CSS3 in practice
Modern CSS handles work that used to require JavaScript: layout with grid and flexbox, theming with custom properties, animation on the compositor, and container queries that let a component respond to its own space rather than the viewport. Every problem solved in CSS is a bundle you do not ship, parse and execute.
The performance difference is not academic. Compositor-driven animation runs off the main thread, so it stays smooth while JavaScript is busy — which is exactly when a JavaScript-driven animation stutters. On mid-range phones, that gap is what users perceive as the difference between a polished product and a slow one.
What we build with CSS3
Grid and flexbox layouts built from container-aware rules rather than a stack of breakpoint patches.
Custom properties for colour, type and spacing, so a brand change is a token edit instead of a search across the codebase.
Transitions, scroll-driven effects and reveals that run on the compositor and stay smooth on mid-range devices.
Is CSS3 right for you?
Ask usA good fit when
- Every project — the only question is how it is organised
- Design systems where tokens must be enforced rather than trusted
- Theming, dark mode and white-labelling at runtime
- Motion and interaction that must stay smooth on mid-range devices
Probably not when
- Nothing, though the organisation of it — Tailwind, modules, plain — is a real per-project choice.
What we run alongside CSS3
The rest of the setup, and why each piece is there. We keep this list short on purpose — every dependency is something someone has to maintain.
- Custom properties
- Runtime theming and design tokens, which no build-time approach can match.
- Grid and flexbox
- Layout without the wrapper divs and float hacks that preceded them.
- Container queries
- Components that adapt to their own container, not just the viewport.
- prefers-reduced-motion
- Respecting the accessibility setting, which is a requirement, not a nicety.
- Tailwind or CSS modules
- Scoping strategy, chosen per project rather than by habit.
Why CSS3
Let’s talkRuns off the main thread
Compositor-driven animation keeps interfaces responsive where JavaScript animation stutters.
Theming without a framework
Custom properties make light and dark modes, white-labelling and brand variants a runtime concern.
Less JavaScript to ship
Every layout or animation problem solved in CSS is a bundle you do not download, parse and execute.
What we get called in to fix
Get a second opinionStylesheets nobody can delete from
Thousands of lines where no one knows what is still used, so everything is added and nothing removed.
Specificity wars
!important layered on !important. Usually a symptom of missing scoping rather than of CSS itself.
Layout shift
Images and embeds without reserved space, which damages both experience and Core Web Vitals.
Animation that stutters
Animating properties that force layout instead of transform and opacity, which the compositor can handle.
CSS3 or the alternative
The comparisons we are actually asked to make, answered the way we would answer them on a call.
CSS-in-JS gives dynamic styling with a runtime cost. Plain or utility CSS ships nothing extra, which shows on slower devices.
Custom properties are live at runtime, so theming and white-labelling work. Preprocessor variables are compiled away.
Grid for two-dimensional layout, flexbox for one. Most real interfaces use both, on purpose.
Android
Angular
Flutter
HTML5
Ionic
Kotlin
React
Swift
XamarinGot an idea? Let’s make it real.
Tell us the short version
This could be the first step towards a new and successful collaboration. A one-line idea and a finished spec are both fine — tell us the problem, the deadline you’re working to and what’s in your way.
Keep looking
Frequently asked questions
Both, depending on the project. Product frontends often justify Tailwind; marketing sites are usually leaner as hand-written CSS.
Custom properties plus a media query and an explicit override, so the system setting and the user’s own choice both work.
To whatever the analytics justify. We agree the support target before the build rather than after a bug report.
Scoping — components, modules or utilities — plus tokens for the values. Unbounded growth is a structural problem, not a discipline problem.
Where the product wants it. Done with custom properties it costs little; retrofitted onto hard-coded colours it costs a great deal.