arca-ui

Under construction - theme in development.

Hard Edge Stack Theme

Neo-brutalist design with sharp edges and bold black shadows. A striking aesthetic that commands attention.

Arca UI overview
Why this project exists

Arca UI started as a side project from an AI site-building agent experiment. Here we explore how AI can craft highly consistent, beautifully styled pages. Multiple designers will iterate on the system over time, with a long-term goal of dozens of themes plus a full agent and workflow stack that makes elegant page building dramatically easier.

Under construction
Hard Edge Stack is still in active development.

We are locking in the core component stack. Sidebar navigation is temporarily disabled while the system is finalized.

Design Philosophy
What makes Hard Edge Stack unique

Hard Edge Stack embraces neo-brutalism with unapologetic bold design choices. Sharp 90-degree corners, thick borders, and strong offset shadows create a layered, architectural feel that stands out from conventional interfaces.

Component Showcases

1
arca-uiTheme v9No blur. Hard shadow.
Hard-Edge Stack
Tactile neo‑brutalism for product UIs. Part of the arca-ui multi-theme collection.
2px carbon borders on everything
Offset shadows (0 blur) for structure
Oatmeal canvas + pure-white surfaces
2
Theme Pack
Popular
Freeopen source
Buttons + forms
Cards + dialogs
Table + charts
3
arca-ui
4
Build statusPASS

Cut a release candidate.

Keep the UI crisp: borders first, shadows second, blur never.

5
AU
arca-ui Team
Component Library
⭐︎ 5.0

"It feels like real paper UI — every layer is legible, every action is satisfying."

ReadableFastTactile
6
Join arca-uiWeekly
7
8
Export78%

Hard shadows keep progress readable on paper-like backgrounds.

9
ShortcutsPro
Search
⌘K
Save
⌘S
Deploy
⇧⌘D
1
arca-uiLive
2
Downloads
24.8k
+12.4%
Themes
5
arca-ui
Contributors
12
ALBNCRDS
3
Theme Usage
Hard-edge charts, crisp tooltip.
Last 6 months+18%
4
ComponentStatusThemeSize
ButtonStableHard-Edge2.4 KB
CardStableHard-Edge1.8 KB
DialogBetaHard-Edge3.2 KB
TableStableHard-Edge4.1 KB
5
Activity24h
Theme released
2m ago
Component added
14m ago
New contributor
1h ago
Bug fixed
3h ago
6
Range
7
AU
arca-ui
Team
8
1
arca-uiNew
Hard-Edge Theme Pack
A tactile UI pack inspired by index cards — bold borders, hard shadows, zero blur.
Preview1280×720
Freeopen source
1,248
2
Theme Pack2 items
Hard-Edge ThemeFree
Pro LicenseFree
Total$0.00
Instant download after payment
3
Theme Pack
Popular
Freeopen source
Buttons + forms
Cards + dialogs
Table + charts
4
FAQ

5
REVIEWToday

"Finally a brutalist theme from arca-ui that still feels premium."

— arca-ui Team
6
10% OFF
7
PromoOptional