Langfuse — design system & UI screens

AI · 1 screen · 13 sections · https://langfuse.com/

An open-source AI engineering platform for building, deploying, and monitoring AI agents. This is a full-length landing page with a prominent hero section featuring the platform's value proposition, followed by feature showcases, comparison sections, and integration details arranged in vertical sections with alternating layouts of text, diagrams, and screenshots.

Open in Mozaika →

This is a static, crawlable rendering for search & AI engines. The interactive version — filters, live decode console, copy & export — is at https://mozaika.design/website/langfuse.

Decoded design system

Langfuse's decoded design system: background #EDEDE8, text #020817, accent #1863DC, link #020817, primary #1863DC; type scale h1 68px / h2 32px / body 18px; 4px spacing base; 2px base radius. The single interactive/action color is #1863DC — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Role	Value
bg	`#EDEDE8`
surface	`#DEDFDB`
border	`#C9CAC8`
text	`#020817`
text_muted	`#5B5F66`
primary	`#1863DC`
accent	`#1863DC`
link	`#020817`
secondary	`#4E4B66`
button_bg	`#1863DC`
button_text	`#FFFFFF`

Using these colors

Action color #1863DC — the single interactive color; only on things you click or must notice, never large fills.
primary, accent, button_bg are all #1863DC — one role, not several (the action color).
accent #1863DC — THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed.
link #020817 — inline text links and link-styled controls.
secondary #4E4B66 — optional secondary accent — LOW decode confidence; use rarely (a status color or a single decorative moment) or omit it entirely. Prefer one accent unless the reference clearly shows two.

Typography

Heading: Inter
Body: Inter
Mono: geistMono
h1: 68px
h2: 32px
body: 18px

Spacing

base unit: 4px
scale: 3px, 4px, 5px, 6px, 8px, 10px, 12px, 14px, 16px, 18px

Radii

base: 2px
button: 2px

Shadows (elevation)

card: rgba(172, 171, 171, 0.3) 0px -1px 10px 0px

Motion

Micro-interactions run at 150ms (dominant) with ease.

durations: 150ms · 180ms · 200ms
easings: ease · cubic-bezier(0.4, 0, 0.2, 1)
animated properties: border-color, color, background-color, outline-color

Native design tokens

Token	Value
`--color-purple-200`	`lab(87.8405% 13.4282 -18.7159)`
`--text-code-orange`	`#c17e2e`
`--color-rose-200`	`lab(86.806% 19.1909 4.07754)`
`--color-slate-200`	`lab(91.7353% -.998765 -4.76968)`
`--color-orange-600`	`lab(57.1026% 64.2584 89.8886)`
`--color-red-900`	`lab(28.5139% 44.5539 29.0463)`
`--color-orange-800`	`lab(37.1566% 46.6433 50.5562)`
`--color-fd-secondary`	`#ededed`
`--color-purple-800`	`lab(30.6017% 56.7637 -64.4751)`
`--color-orange-900`	`lab(30.2951% 36.0434 37.671)`

…and 110 more measured on the page.

Layout (measured)

container max-width: 840px
nav: 60px sticky, backdrop blur(12px)
common grid: 2 columns

Motion choreography (measured)

Load order: p.font-sans×4 → div.flex×2 → div.flex×2 → div.group → section.mx-auto×2 → a.focus-visible:outline-no

Scroll reveal: 6 elements rest at opacity 0, animate in over 0.7s ease.

Responsive (measured)

breakpoints: 768px · 1012px · 1400px
mobile (390px): hero 32px · nav inline

Full design system, per-section tokens & DESIGN.md / Tailwind / CSS exports →

Screens

Open Source AI Engineering Platform - Landing Page