UI & Styling

Design System Overview

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Tailwind CSS 4 Setup

Tailwind CSS 4 uses the native Vite plugin (no PostCSS needed):

// vite.config.ts
import tailwindcss from '@tailwindcss/vite'
plugins: [react(), tailwindcss()]

/* styles/index.css */
@import "tailwindcss";
@import "./theme.css";
@import "./typography.css";

/* Cross-package source scanning */
@source "../../../../packages/ui/src/**/*.{js,ts,jsx,tsx}";

Utility function: cx() from @dtx/utils — combines clsx + tailwind-merge for safe class merging.

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Color Palette

Brand Colors (Purple)

Token	Value	Usage
--color-brand-25	Lightest purple	Subtle backgrounds
--color-brand-50		Hover states
--color-brand-100		Active states
--color-brand-300		Borders
--color-brand-500	rgb(158 119 237)	Primary brand
--color-brand-600		Solid backgrounds
--color-brand-700		Dark variant
--color-brand-950	Deepest purple	Dark mode primary

Semantic Colors

Category	Tokens
Text	text-primary (900 gray), text-secondary (700), text-tertiary (600), text-disabled (400), text-brand-primary (purple), text-error-primary (red)
Background	bg-primary (white), bg-secondary (50 gray), bg-brand-solid (purple-600), bg-error-primary (red-50), bg-warning-primary (orange-50), bg-success-primary (green-50)
Border	border-primary (200 gray), border-brand (purple-300), border-error (red-300), border-disabled (300 gray)

Extended Palette

Full 25–950 shade ramps for: Gray (9 variants), Error (red), Warning (orange), Success (green), Blue, Indigo, Violet, Purple, Pink, Rose, Orange, Yellow, Teal, Cyan

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Typography

Font Families

Token	Stack
--font-body	Inter, system-ui, -apple-system, sans-serif
--font-display	Inter, system-ui, -apple-system, sans-serif
--font-mono	Roboto Mono, SFMono-Regular, Menlo, Monaco, monospace

Type Scale

Name	Size	Line Height	Usage
Display 2xl	72px	90px	Hero headings
Display xl	60px	72px	Major section heads
Display lg	48px	60px	Page titles
Display md	36px	44px	Section titles
Display sm	30px	38px	Card headings
Display xs	24px	32px	Sub-headings
Body xl	20px	30px	Large body text
Body lg	18px	28px	Prominent body
Body md	16px	24px	Default body
Body sm	14px	20px	Secondary text
Body xs	12px	18px	Captions, labels

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Spacing & Radius

Border Radius

Token	Value	Usage
--radius-xxs	2px	Inline badges
--radius-xs	4px	Small elements
--radius-sm	6px	Inputs, small cards
--radius-md	8px	Cards, dropdowns
--radius-lg	10px	Modals
--radius-xl	12px	Large cards
--radius-2xl	16px	Feature cards
--radius-full	9999px	Avatars, pills

Shadows

Token	Usage
--shadow-xs	Subtle inputs
--shadow-sm	Cards, dropdowns
--shadow-md	Elevated cards
--shadow-lg	Modals
--shadow-xl	Popovers
--shadow-2xl	Page-level elevation
--shadow-3xl	Full-screen overlays

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Icons

Library: @untitledui/icons 0.0.19 + @untitledui/file-icons 0.0.9

// Via @dtx/ui re-export
import { ArrowUp, Settings } from '@dtx/ui';

// Direct import
import { Home03, Users03, Dataflow03 } from '@untitledui/icons';

// Usage
<ArrowUp className="w-4 h-4" />
<Settings size={24} />

Commonly Used Icons

Category	Icons
Navigation	Home03, BookOpen01, Settings01, LifeBuoy01
Users	Users03, Users01, Shield01
Data	Database01, Table, Link01, FolderCode, Cube01
Pipeline	Dataflow03, Dataflow04, PenTool01
Infrastructure	Server01, MessageCircle01, GitBranch01
Actions	Plus, Edit01, Trash01, Copy01, RefreshCcw01, SearchLg
Status	CheckSquare, ClipboardList, Clock, Key01
UI	ChevronSelectorVertical, HelpCircle, ArrowDown, BarChart03

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Responsive Design

Approach: Desktop-first. The app is primarily designed for desktop use.

Breakpoint	Width	Usage
xxs	320px	Mobile (minimal support)
xs	600px	Small tablet
sm	640px	Tailwind default
md	768px	Tailwind default
lg	1024px	Tailwind default
xl	1280px	Tailwind default — max container

The sidebar collapses on smaller screens. Most complex UI (designers, data tables) requires desktop resolution.

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Dark Mode

Status: Configured but not fully rolled out across all components.

Implementation: Class-based via .dark-mode CSS class:

@custom-variant dark (&:where(.dark-mode, .dark-mode *));

Usage in components:

<div className="bg-white dark:bg-gray-800 text-gray-900 dark:text-gray-100">

Monaco Editor: Dual themes — expression-light and expression-dark

No user-facing toggle is present in the current UI.

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Animations

Source	Usage
CSS (Tailwind)	animate-spin (loading), transition + duration-100 (interactions)
Custom keyframes	marquee (scrolling text, 60s), caret-blink (cursor, 1s)
Motion	Available in deps but minimal direct usage in portal

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Custom CSS Variants

Variant	Selector	Purpose
dark	.dark-mode	Dark mode styles
label	[data-label]	Label attribute targeting
focus-input-within	:has(input:focus)	Parent focus styles

Global Resets

• Font smoothing (-webkit-font-smoothing: antialiased)
• Number input spinner removal
• Search input clear button removal
• Details/summary marker hiding
• Custom scrollbar hiding utility (scrollbar-hide)