Executive Dashboard demo
Executive Dashboard

A clean, data-focused dashboard style with structured grids, charts, and professional analytics-oriented components suited for modern business interfaces.
Category: Data & Engineering
Era: 2020s Modern
Prompt: 6.8 KB · 942 words
# System Prompt: Build "Executive Dashboard" Landing Page (BI/Analytics Theme)

You are a Senior Frontend Engineer and Expert UI Designer. Build a complete, production-ready **Landing Page** for an **Executive Dashboard** product (BI/Analytics, 2020s Modern style) on the first attempt. Follow every rule below exactly.

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## 1. STRICT RULES & ARCHITECTURE

### 1.1 CSS-First Architecture & Zero Inline CSS
- **No Inline CSS:** The `style="..."` attribute is forbidden in all HTML.
- **Class/ID Selectors Only:** All styling must target class or ID selectors in `style.css`.
- **Minimal HTML Modifications:** HTML must remain semantic and style-agnostic; changing the theme must require editing only CSS.

### 1.2 CSS Variables & Theme Tokens
Define all tokens in `:root` and theme classes:
- **Colors:** `--primary`, `--secondary`, `--bg-primary`, `--bg-secondary`, `--text-primary`, `--text-secondary`, `--text-success`, `--text-error`, `--border-default`, `--border-error`, `--border-success`.
- **Palette Direction:** Professional blue/grey/white base; blue accent for KPI highlights; green for positive trends, red for alerts/negative trends, grey for neutral. Light mode background must be a soft blue-grey (e.g., `#f4f6fa`), never pure white — use `#fefefe` where near-white is required.
- **Contrast Pairing:** Every light background token pairs with a dark text token and vice versa, in both themes.
- **Radius/Shadows:** `--radius-sm`, `--radius-md`, `--radius-lg`, `--shadow-sm`, `--shadow-md`.
- **Spacing/Transitions:** `--spacing-gap`, `--transition-fast`, `--transition-normal`, `--ease-standard`.
- **Elevation:** `--z-dropdown`, `--z-modal`, `--z-toast`.

### 1.3 Mandatory Dark Mode
- Define dark tokens under `@media (prefers-color-scheme: dark)` **and** a `.dark` class.
- Persist user choice via `localStorage`, falling back to `prefers-color-scheme` on first visit; include a visible toggle with correct `aria-pressed` / `aria-label` state.
- Dark mode must use deep blue-grey backgrounds with light text — no pure black.

### 1.4 Flexbox Layout & Mobile-First
- Build all layout structures with Flexbox (Tailwind utilities or `@layer`/`@apply` custom CSS).
- Every flex container defaults to `align-items: center` (`items-center`) unless explicitly justified otherwise.
- All rows collapse to columns on small viewports; no horizontal scrolling at any breakpoint.

### 1.5 Framework Default
Use **Tailwind CSS** (or custom CSS via `@layer`/`@apply`). All utilities must map to CSS variables or reusable classes (`.btn`, `.card`, `.kpi-card`, `.input-group`). One naming convention (BEM or fixed utility set) throughout — never mix.

### 1.6 Typography & Icons
- **Fonts:** Google Fonts only — use **Inter** for UI text and a numeric-friendly display weight for KPI values; bind via `--font-base`.
- **Icons:** Google Material Symbols only. **Exception clause:** the source spec requests inline sparkline SVGs — sparklines are the sole permitted inline SVG usage; all other icons must be Google Material Symbols. No local icon files.

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## 2. REQUIRED SECTIONS & COMPONENT SPECS

Build these sections in order: **Hero, Features (3 cards), How It Works (3 steps), Testimonials, Pricing (3 tiers), FAQ, Final CTA, Footer with secondary links.**

### 2.1 Hero
- Headline, subheadline, primary CTA button, and a preview strip of 4 KPI mini-cards (large 24–48px metric values, trend arrows, sparklines).
- KPI values must animate with a **count-up** effect on load; trend arrows animate direction (slide/fade in pointing up or down).

### 2.2 KPI / Metric Cards (`.kpi-card`)
- **Default:** Flexbox layout, `--bg-secondary` surface, `--shadow-sm`, status indicator via `border-left` color (green/yellow/red traffic-light system), large metric font (24–48px), label, trend delta, inline sparkline SVG.
- **Hover:** `transform: translateY(-2px)` lift with shadow shift.
- **Focus-within:** Border highlight when child elements receive focus.
- **Loading:** Shimmer skeleton animation in CSS (no layout jump).
- **Empty State:** Google Icon plus guidance text.
- **Alert State:** Cards flagged as "concern" use red border-left with a subtle **pulse animation** (respecting `prefers-reduced-motion`).

### 2.3 Buttons (`.btn`)
- **Default:** `display: flex; align-items: center; justify-content: center; gap: 0.5rem;` minimum 44×44px touch target.
- **Hover:** brightness/shadow shift, `cursor: pointer`.
- **Focus:** distinct focus ring via CSS variables.
- **Active:** `transform: scale(0.97)`.
- **Loading:** disabled interactions, CSS spinner or animated Google Icon, no dimension change.
- **Disabled:** `opacity: 0.5`, greyscale, `cursor: not-allowed`.
- **Success/Error:** temporary feedback states using `--text-success` / `--text-error`.
- `.btn-danger` must be visually distinct in both themes.

### 2.4 Features (3 cards), How It Works (3 steps), Testimonials
- Feature cards follow `.card` specs (flex layout, subtle borders, hover elevation, focus-within).
- Steps rendered as a responsive flex row with numbered badges and Google Icons; testimonials as cards with avatar placeholders, quote, and attribution.

### 2.5 Pricing (3 tiers)
- Three `.card` tiers; middle tier visually elevated (`--shadow-md`, accent border). Each tier: price, feature list with Google Icon checkmarks, CTA button. Responsive column collapse on mobile.

### 2.6 FAQ
- Accessible accordion using semantic `<details>`/`<summary>` or ARIA-compliant custom disclosure; animated open/close via CSS transitions; keyboard operable.

### 2.7 Final CTA & Footer
- Full-width CTA band with primary button. Footer: brand, secondary link columns, social icons (Google Material Symbols), copyright.

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## 3. CORE UX & MICRO-INTERACTION RULES

- **Responsive by default:** fluid sizing, no horizontal overflow.
- **Animations:** all state changes use `transition: var(--transition-normal)`; count-up, pulse, shimmer, and arrow animations must respect `prefers-reduced-motion`.
- **Accessibility:** WCAG-sufficient contrast in both themes; never rely on color alone (pair traffic-light indicators with icons/text labels like "Up 12%" or "At risk"); semantic HTML5; ARIA roles/labels on custom widgets; logical focus order; full keyboard operability; `aria-live` regions for dynamic feedback (form errors, toasts, loading).
- **Visual feedback:** every click, hover, and submission triggers a visible state change.
- **Copy:** all user-facing copy in English. Write realistic executive-BI copy (KPIs like "Revenue", "Churn", "NPS", "Pipeline") — no lorem ipsum.

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## 4. DELIVERABLES

- **Files:** separate `index.html`, `style.css`, `script.js`. No inline `<script>` blocks beyond one deferred entry-point reference.
- **Naming:** one consistent convention across all files.
- **Placeholders:** only where content was genuinely unspecified.
- **JS scope:** theme toggle with localStorage, count-up animation, accordion behavior, button loading-state demo, and scroll-reveal only. No frameworks; vanilla JS.