I obsess over structure, spacing, and the invisible systems that make interfaces feel right. This page is both a manifesto and a specimen sheet.
Every element earns its place. If it doesn’t communicate, it’s noise.
Grids, tokens, and systems aren’t constraints—they’re the foundation for creative decisions.
A 1px adjustment, the right easing curve, proper kerning—small things build trust at scale.
Good design is iterative. Pixel-perfection comes from real feedback, not imagination.
Satoshi
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0123456789 !@#$%&;
DM Sans
ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz
0123456789 !@#$%&;
JetBrains Mono
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The quick brown fox jumps over the lazy dog
300The quick brown fox jumps over the lazy dog
400The quick brown fox jumps over the lazy dog
500The quick brown fox jumps over the lazy dog
600The quick brown fox jumps over the lazy dog
700The quick brown fox jumps over the lazy dog
800The quick brown fox jumps over the lazy dog
900Good design is invisible. It removes friction so the user can focus on what matters most.
Good design is invisible. It removes friction so the user can focus on what matters most.
Good design is invisible. It removes friction so the user can focus on what matters most.
Good design is invisible. It removes friction so the user can focus on what matters most.
Good design is invisible. It removes friction so the user can focus on what matters most.
Typography & Spacing
Typography & Spacing
Typography & Spacing
Typography & Spacing
Typography & Spacing
Typography & Spacing
The quick brown fox
The quick brown fox
The quick brown fox
The quick brown fox
THE QUICK BROWN FOX
the quick brown fox
Good design is not just about aesthetics. It's about solving problems, reducing friction, and making complex things feel effortless. Every pixel, every interaction, every transition should serve a purpose.
Typography is the craft of endowing human language with a durable visual form. It shapes how we read, how we feel, and how we understand. The right typeface at the right weight with the right spacing can make content breathe — or suffocate it.
Consistency in typographic rhythm — line height, letter spacing, and vertical cadence — builds the invisible scaffolding that lets content speak for itself.
Inline code like font-heading should feel embedded, not disruptive. Monospaced fragments within body text need enough contrast to stand out while maintaining reading flow.
Typography must hold up across surfaces. On dark backgrounds, lighter weights and slightly increased letter spacing improve legibility and reduce visual vibration.
A minimal card with clear hierarchy and breathing room.
Individual elements
Card transition
Analytics overview with real-time metrics.
Linear bars
Animated
Spinners
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Default
Design tokens are the primitive values — colors, spacing, radii, typography — that feed every component. They ensure visual consistency across the entire system and make global updates trivial.
Create a new component when a pattern appears in two or more features. Until then, keep the code colocated with the feature that owns it. Premature abstraction is worse than duplication.
The palette switches at the root via a CSS class. Every token has a light and dark value. Components reference tokens, never raw hex values, so the swap is automatic.
Open a proposal issue describing the component, its use cases, and expected API. Once approved, build it against the token system and submit a PR with specimens for this page.
Minimal
Design tokens are the primitive values — colors, spacing, radii, typography — that feed every component. They ensure visual consistency across the entire system and make global updates trivial.
Create a new component when a pattern appears in two or more features. Until then, keep the code colocated with the feature that owns it. Premature abstraction is worse than duplication.
The palette switches at the root via a CSS class. Every token has a light and dark value. Components reference tokens, never raw hex values, so the swap is automatic.
Plus / Minus (multi-open)
Design tokens are the primitive values — colors, spacing, radii, typography — that feed every component. They ensure visual consistency across the entire system and make global updates trivial.
Create a new component when a pattern appears in two or more features. Until then, keep the code colocated with the feature that owns it. Premature abstraction is worse than duplication.
The palette switches at the root via a CSS class. Every token has a light and dark value. Components reference tokens, never raw hex values, so the swap is automatic.
Basic
A personal design system built with Next.js, Tailwind CSS, and TypeScript. Every token, component, and pattern is documented on this page.
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Dark / White
16.5:1
Dark / Surface
15.2:1
Primary / White
3.9:1
White / Dark
16.5:1
Light / Primary
3.6:1
Muted / White
7.2:1
| Level | Normal text | Large text |
|---|---|---|
| AA | 4.5 : 1 | 3 : 1 |
| AAA | 7 : 1 | 4.5 : 1 |
Below 640px — mobile-first default. No prefix needed.
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Default
| Name | Category | Weight | License | Status |
|---|---|---|---|---|
| Inter | Sans-serif | 400–700 | Open | active |
| JetBrains Mono | Monospace | 400–600 | Open | active |
| Instrument Serif | Serif | 400 | Open | active |
| SF Pro | Sans-serif | 100–900 | Restricted | deprecated |
| Fira Code | Monospace | 300–700 | Open | review |
Striped
| Token | Value | Usage |
|---|---|---|
| spacing-xs | 4px | Tight gaps, icon padding |
| spacing-sm | 8px | Inline spacing, small gaps |
| spacing-md | 16px | Default component padding |
| spacing-lg | 24px | Section gaps |
| spacing-xl | 32px | Card padding, large gaps |
| spacing-2xl | 48px | Section padding |
Underline
High-level summary of the design system, its purpose, and guiding principles.
Pill
High-level summary of the design system, its purpose, and guiding principles.
Segmented
Vertical
High-level summary of the design system, its purpose, and guiding principles.
Aspect Ratios
1:1
Avatars, thumbnails
4:3
Cards, previews
16:9
Hero images, banners
21:9
Cinematic, wide banners
Treatments
Rounded
Standard border radius for contained images
Circle crop
Profile photos and avatars
Border
Subtle border for low-contrast images
Shadow
Elevated images for emphasis
Overlays
Guidelines
Use rounded-xl or rounded-2xl
Consistent with component system radii
Prefer 4:3 or 16:9 ratios
Predictable layout, avoids CLS
Add ring-1 on light backgrounds
Defines image edge when contrast is low
Use object-cover, never stretch
Maintains subject composition
Data visualizations constructed with Echarts, using configurations referenced from the feon-cloud charts implementation.