Runtime fingerprintToken readout from the active provider chain.
Live DS
Runtime
PlatformRottay
Rottay / ModernPlatform Flagship
Primary
#FFFFFFSecondary #A0A0A5
Radius
Compact runtime evidence across 3+ token signals.
Published DS package · Component Layer · Rottay / modernShared route metadata for the active runtime, kept inline so the shell reads like a thin header band.
Palette
#FFFFFFRottay
Chrome
Modernrenderer posture
Radius
14pxsurface shape
Density
normalPlatform Flagship
Reference summaryFlexbox layout container with gap and alignmentLayout primitives should create consistent rhythm and adaptability before product-specific styling appears.
How to read this pageUse the showroom switchers in the sidebar to change engine and tenant, then judge this primitive in the live preview before styling around it locally.
At a glanceThe meta cards below are the quickest read on how this primitive behaves across the current runtime.
LayoutFoundational layout tools that make everything else look considered rather than improvised.
Best paired with
all tiersEscalate to patterns or surfaces when workflow logic starts dominating.
Use it when
assembling sections
creating page rhythm
defining responsive shells
Review checklist
spacing systems
alignment
responsive adaptation
Common pairings
all tiers
surface recipes
content-heavy pages
Live preview
Compare the same primitive across engines
Sidebar controls drive thisFlex
This is the primary runtime verification surface for the component. Engine and tenant changes should land in the rendered DS primitive itself, not in showroom-local wrapper styling.
Preview heuristics
Compare hierarchy, spacing, and interaction feedback before any page-level styling.
The rendered primitive should carry the engine and tenant differences by itself.
If it only looks right inside local wrapper chrome, the primitive or preview needs more work.
Engine comparisonEngine comparisonThe active tenant stays real while the same component is rendered by every engine. The wrapper stays intentionally quiet so engine differences come from the DS itself.
Rottay3 live engines
Consumption
Import and usage
Keep the primitive contract visible. These snippets are meant to help teams consume the base component before they wrap or escalate it.Browse all Layout
Adoption postureStart with Flex, not a wrapperImport directly from the design system package, verify the base behavior across 3 engines here, and only wrap when workflow logic starts repeating.
The primitive should stay legible before any page-specific chrome is layered on top.
Usage notes
Import directly from the design system package and keep composition simple first.
Use category-appropriate props before creating wrapper APIs that hide the base contract.
Escalate to patterns or surfaces only when workflow logic clearly outweighs local UI concerns.
API surface
Props
Curated reference for fast browsing. Verify edge-case props against the source until this table is extracted directly from the DS.
Reference scan5 documented props1 required and 4 optional rows are listed here so teams can review the contract without digging through source immediately.
Confirm uncommon edge cases against the component implementation until this table is extracted automatically.
Reference disciplineThe table below is tuned for quick scanning in docs. For unusual composition or engine-specific behavior, treat the DS source as the final authority.
Flex propsProp contracts stay readable across dark-first and light-first tenants.
5 props1 required4 optional
Required
Optional
Optional
Optional
Optional
Related components
Continue within Layout
If Flex is close but not quite right, scan nearby primitives in the same tier before jumping to a heavier surface or pattern abstraction.Browse all Layout
Next moveStay within Layout firstCategory siblings usually solve adjacent states while preserving the same primitive contract level and runtime expectations.
Escalate to patterns or surfaces only when the interaction model itself changes.
Published entrypoint@rottay/design-systemUse the shared package surface as the default import path for Flex. It keeps adoption readable and future extraction work straightforward.
Base tier: Layout
EntrypointKeep imports directReach for the published DS export first so teams can read the contract at a glance.
ImportPublished package entrypoint, ready to copy.
tsx
1 line
Consumption
Runtime-aware snippet
Baseline exampleStart with FlexUse the smallest valid composition first, then layer in product-specific wrappers only when the workflow truly needs them.
UsagePaste-ready example that shows the base contract first.
tsx
4 lines
Consumption
Runtime-aware snippet
Fast readStart with required props, then scan defaults before dropping to per-row details.
Contract postureThis reference stays intentionally concise so the primitive contract remains scannable.
Name
Type
Default
Required
Description
children
ReactNode
none
Layout children arranged by the component.
gap
number | string
none
Spacing between child elements.
align
string
none
Cross-axis alignment for layout primitives that support it.
className
string
none
Additional CSS class names.
style
CSSProperties
none
Inline style overrides.
childrenRequired
ReactNodenone
Layout children arranged by the component.
gapOptional
number | stringnone
Spacing between child elements.
alignOptional
stringnone
Cross-axis alignment for layout primitives that support it.
classNameOptional
stringnone
Additional CSS class names.
styleOptional
CSSPropertiesnone
Inline style overrides.
Also in Layout3 engines
BoxGeneric layout box replacing raw div
Peer primitive within the same category set.Open detail
Also in Layout3 engines
CollapseExpandable/collapsible content panel
Peer primitive within the same category set.Open detail
Also in Layout3 engines
ContainerMax-width centered content wrapper
Peer primitive within the same category set.Open detail
B
C
Runtime fingerprint
Runtime
PlatformRottay
Rottay / ModernPlatform Flagship
Primary
#FFFFFFSecondary #A0A0A5
Radius
14pxxl 18px
Compact runtime evidence across 2+ token signals.
Note
Check rhythm, spacing, and whether the component creates obvious structure rather than empty scaffolding.
A
B
C
Runtime fingerprint
Runtime
PlatformRottay
Rottay / ModernPlatform Flagship
Primary
#FFFFFFSecondary #A0A0A5
Radius
Compact runtime evidence across 2+ token signals.
Note
Check rhythm, spacing, and whether the component creates obvious structure rather than empty scaffolding.
B
C
Runtime fingerprint
Runtime
PlatformRottay
Rottay / ModernPlatform Flagship
Primary
#FFFFFFSecondary #A0A0A5
Radius
Compact runtime evidence across 2+ token signals.
Note
Check rhythm, spacing, and whether the component creates obvious structure rather than empty scaffolding.