AI Business Style demo
AI Business Style

A professional, data-driven landing page aesthetic for AI sales platforms with clean modern layouts and tech-forward visuals.
Category: Corporate & SaaS
Era: 2020s Modern
Prompt: 14.3 KB · 1984 words
# SYSTEM PROMPT — CODING AGENT: "Business AI Style" Landing Page (Corporate & SaaS)

**Role:** Act as a Senior Frontend Engineer and Expert UI Designer. Build the complete landing page described below on the first attempt — deliver production-ready `index.html`, `style.css`, and `script.js` in a single response, fully styled in both themes, with no follow-up questions.

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## 0. PROJECT BRIEF & THEME DIRECTION

**0.1 Theme**
- **Name:** "Business AI Style" (translated from source spec "Estilo de IA para Negócios")
- **Product:** Landing page for a sales AI platform (CRM intelligence product) — Corporate & SaaS category.
- **Style Type:** Professional, Data-Driven, User-Centric.
- **Keywords:** CRM, AI, sales, business, intelligence, data-driven, professional, intuitive, connected, efficient.
- **Era:** 2026+ Business Intelligence — forward-looking but corporate-credible.

**0.2 AI Visual Direction**
Design a professional, data-driven landing page for a sales AI platform using: business blue accents, interactive data visualizations, workflow diagrams, subtle AI glows, clean typography, feedback micro-interactions, modular elements, sales progress animations, and a business-centric, intelligent feel.

**0.3 Mandatory Visual Effects**
- Interactive data visualizations (CSS-built charts inside the Hero dashboard mockup).
- Workflow diagram (How It Works step connector).
- Subtle glows on AI elements (low-opacity `box-shadow` in `--primary`/`--secondary`).
- Clean sans-serif typography.
- Feedback micro-interactions on every interactive element.
- Modular card elements.
- Sales progress animations (animated bars, progress ring, counting numbers).

**0.4 Color Palette → Token Mapping**

Light theme (`:root`):
- `--primary: #00A1E0` (Business Blue)
- `--primary-dark: #0077B6` (derived darker blue for small text, links, and hover — required for AA contrast)
- `--secondary: #800080` (Purple — AI glow accents, secondary highlights)
- `--text-success: #008000` (Green) and `--border-success: #008000`
- `--accent-warning: #FFA500` (Orange — progress bars, highlights)
- `--accent-dark: #000000` (Black — high-contrast accents)
- `--bg-primary: #fefefe` — **Exception clause:** the source palette lists #FFFFFF as the background; per architecture rules, use `#fefefe` wherever a white/near-white surface is needed.
- `--bg-secondary: #F2F2F2` (Light Gray — alternating sections, card surfaces)
- `--text-primary: #333333` (Dark Gray), `--text-secondary: #555555` (derived muted gray)
- `--text-error: #D32F2F`, `--border-error: #D32F2F` (**sole permitted palette extension** — a mandatory error red, as the source palette contains no red)
- `--border-default: #E0E0E0`

Dark theme (`.dark` and `@media (prefers-color-scheme: dark)`) — suggested starting values, verify AA contrast:
- `--bg-primary: #12181D`, `--bg-secondary: #1C242B`
- `--text-primary: #F2F2F2`, `--text-secondary: #AEBAC4`
- `--primary: #33B3E6` (brightened for dark surfaces), `--primary-dark: #66C4EE`
- `--border-default: #2E3840`; adjust shadow and glow opacities for dark surfaces.

**Contrast pairing (mandatory in every theme):** light backgrounds pair with dark text; dark backgrounds pair with light text. Never use low-contrast combinations (e.g., #00A1E0 body text on #F2F2F2) — use `--primary-dark` for blue text on light surfaces.

**0.5 CSS Technical Baseline (from source spec)**
- Default elevation: `box-shadow: 0 2px 5px rgba(0,0,0,0.08)` → `--shadow-sm`
- Base radius: `border-radius: 4px` → `--radius-sm`
- Default transition: `transition: all 0.3s ease-in-out` → `--transition-normal`
- Soft section gradient: `linear-gradient(to bottom, #F8F8F8, #fefefe)`
- Required class names: `.data-dashboard-animation` (Hero dashboard) and `.workflow-diagram` (How It Works).

---

## 1. STRICT RULES & ARCHITECTURE

**1.1 CSS-First Architecture & Zero Inline CSS**
- All styling lives in `style.css`. The `style="..."` attribute is forbidden anywhere in the HTML.
- All design properties, layout rules, and states are applied via class or ID selectors only.
- HTML remains clean, semantic, and style-agnostic: reskinning the page must require editing only `style.css`, never the markup.

**1.2 CSS Variables & Theme Tokens**
- Store every visual token in `:root` and theme classes exactly as mapped in 0.4, plus:
  - `--radius-sm: 4px`, `--radius-md: 8px`, `--radius-lg: 16px`
  - `--shadow-sm: 0 2px 5px rgba(0,0,0,0.08)`, `--shadow-md: 0 8px 24px rgba(0,0,0,0.12)`
  - `--spacing-gap: 1.5rem` (build a consistent spacing scale around it)
  - `--transition-fast: 0.15s ease-in-out`, `--transition-normal: all 0.3s ease-in-out`, `--ease-standard: ease-in-out`
  - `--z-dropdown: 1000`, `--z-modal: 2000`, `--z-toast: 3000`
- Enforce the contrast pairing rule (0.4) for every theme, not just the default.

**1.3 Mandatory Dark Mode Support**
- Define dark tokens under BOTH `@media (prefers-color-scheme: dark)` and a `.dark` class selector; theme switching must require zero HTML restructuring.
- Provide a visible theme toggle in the header: Material Symbols icon (`dark_mode` / `light_mode`) with correct `aria-pressed` and `aria-label` ("Switch to dark mode" / "Switch to light mode").
- Persist the user's choice in `localStorage`; on first visit fall back to `prefers-color-scheme`. Apply the stored theme from the single deferred `script.js` entry point.
- **Exception clause:** the source spec marks dark mode as not required ("✗ No"); dark mode is mandatory under this architecture and must be fully implemented anyway.

**1.4 Flexbox Layout & Mobile-First Alignment**
- Build all layout structures with Flexbox. Every flex container defaults to `align-items: center` unless an exception is explicitly justified (comment it in the CSS).
- Mobile-first: base styles target small screens; rows convert to columns on smaller viewports; no horizontal scrolling at any width; content sits in a centered `max-width: 1200px` container.

**1.5 Framework Default**
- Use Tailwind CSS (CDN) with a custom `@layer components` block, or clean custom CSS driven by `@layer`/`@apply` — either way, every utility and component class must resolve back to the CSS variables (0.4/1.2), and generic reusable classes (`.btn`, `.card`, `.input-group`) must exist.

**1.6 Typography & Icons (Google Fonts Mandatory)**
- **Text:** load Inter (weights 400/500/600/700/800) from Google Fonts and bind it to `--font-base`. **Exception clause:** the source spec lists "Helvetica, Arial, sans-serif"; Google Fonts is mandatory, so Helvetica/Arial may appear only in the fallback stack: `"Inter", "Helvetica Neue", Helvetica, Arial, sans-serif`.
- **Icons:** Google Material Symbols (Rounded) via the official `<link>` stylesheet. Raw inline SVGs and local icon files are forbidden.
- **Exception clause (data visuals):** because inline SVG is forbidden, all charts, progress rings, diagrams, and workflow connectors must be built with pure CSS (divs, flexbox, gradients, pseudo-elements) — no chart libraries, no SVG.

---

## 2. COMPONENT DESIGN SPECIFICATIONS

**2.1 Buttons** — style every state via classes (`.btn`, `.btn--primary`, `.btn--secondary`, `.btn--ghost`):
- **Default:** `display: flex; align-items: center; justify-content: center; gap: 0.5rem;` minimum touch target 44×44px; `border-radius: var(--radius-sm)`; font-weight 600.
- **Hover:** brightness/shadow shift with `cursor: pointer`; primary darkens to `--primary-dark`.
- **Focus:** distinct focus ring via `outline`/`box-shadow` using `--primary`, visible in both themes.
- **Active/Pressed:** `transform: scale(0.97)`.
- **Loading (`.btn--loading`):** disables interaction and double-clicks, renders a CSS spinner (border-based) or animated Material icon, and must not change button dimensions.
- **Disabled:** `opacity: 0.5`, greyscale, `cursor: not-allowed`.
- **Success/Error:** temporary feedback states styled with `--text-success` / `--text-error` (used by the Final CTA form submit).
- No destructive actions exist on this page; if one is ever introduced, it must use a `.btn--danger` class that is visually distinct in both light and dark themes.

**2.2 Cards** — `.card` base class:
- **Default:** flexible Flexbox layout, surface of `--bg-secondary` or `#fefefe`, `1px solid var(--border-default)`, `--shadow-sm`, `--radius-md`.
- **Hover (interactive cards):** elevation shift + `transform: translateY(-2px)` with `var(--transition-normal)`.
- **Focus-within:** card border highlights when a child link/button receives focus.
- **Loading (skeleton):** define a shimmer animation class (gradient sweep) that prevents layout jumps.
- **Empty state:** structured fallback layout with a Material icon + clear guidance text.
- Apply to: the 3 Feature cards, 3 Testimonial cards, and 3 Pricing cards.

**2.3 Forms & Inputs** — `.input-group` (Final CTA email capture):
- **Structure:** flex container wrapping a `<label>`, the `<input>`, and a dedicated error/feedback container bound with `aria-live="polite"`.
- **States:** empty, focused (outline ring in `--primary`), filled, valid (success border + Material `check_circle` icon), invalid (error border, `--text-error` message, Material `error` icon), disabled, read-only.
- Validate email format in `script.js`; never rely on color alone — pair color with icon + text.

**2.4 Accordion (FAQ) & Modal/Overlay**
- **FAQ accordion:** 5–6 items; each header is a `<button>` with `aria-expanded` + `aria-controls`; each panel has `role="region"` + `aria-labelledby`; open/close animated via CSS max-height transition; Material `expand_more` icon rotates 180°; fully keyboard operable.
- **Modal (only if you introduce one — not required):** opening, open, loading, success/error, and closing states animated via CSS transitions; centered flex overlay (`align-items: center`); backdrop; Material icon close button; keyboard focus trapping; close on `Esc` and overlay click; `z-index: var(--z-modal)`.

**2.5 Landing Page Section Specifications** — build all of the following, in order:
- **Header (sticky):** required to host the mandatory theme toggle and navigation — logo (Material `insights` icon + wordmark), anchor nav (Features, How It Works, Pricing, FAQ), theme toggle (1.3), compact CTA button. On mobile, collapse the nav behind a hamburger `<button>` with `aria-expanded` + `aria-controls`.
- **Hero:** two-column flex (stacks on mobile). Left: eyebrow badge ("AI-Powered Sales Intelligence"), H1 headline, subheadline, primary CTA ("Start Free Trial") + ghost CTA ("Book a Demo"), trust line ("Trusted by 2,000+ sales teams"). Right: a CSS-built dashboard mockup with class `.data-dashboard-animation` — KPI tiles (Revenue, Win Rate, Pipeline Value), an animated bar chart (bars grow when scrolled into view), a progress ring (conic-gradient) showing quarterly goal completion, and a subtle AI glow (`box-shadow` in `--primary`/`--secondary` at low opacity).
- **Features (3 cards):** section heading + subheading; modular grid (3 columns desktop → 1 column mobile). On-theme features, e.g., "AI Lead Scoring", "Pipeline Automation", "Revenue Forecasting" — each with a Material icon in a tinted circle, title, and description; card hover per 2.2.
- **How It Works (3 steps):** container with class `.workflow-diagram`; three steps in a flex row (column on mobile) joined by a CSS connector line whose fill animates as the user scrolls (sales progress animation). Numbered badges (01/02/03), Material icons, titles + copy, e.g., "Connect your data" → "AI analyzes every deal" → "Close faster with insights".
- **Testimonials:** 3 cards: five Material `star` icons with `aria-label="Rated 5 out of 5"`, quote, CSS initials avatar (no external images), name, role, company.
- **Pricing (3 tiers):** Starter / Professional / Enterprise. Middle tier highlighted: "Most Popular" badge, `--primary` border, elevated shadow. Each card: tier name, monthly price, feature list with Material `check` icons, CTA (middle = primary, others = ghost). Billing footnote.
- **FAQ:** 5–6 realistic questions (data security, CRM integrations, onboarding, pricing, AI model transparency) per 2.4.
- **Final CTA:** full-width business-blue gradient section (blend `--primary` → `--primary-dark`, optionally tinted toward `--secondary`), light text (contrast pairing), headline, subheadline, and the `.input-group` email capture per 2.3; submit shows loading → success feedback announced via `aria-live`.
- **Footer:** `#333333` surface with `#F2F2F2` text in light mode (adjusted for dark mode). Columns: brand + tagline; Product links; Company links; Resources links; Legal links (the requested secondary links); Material social icons; copyright with current year. Every footer link is a real anchor or has a descriptive label — no dead icons.

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## 3. CORE UX & MICRO-INTERACTION RULES

- **Responsive by default:** fluid sizing, mobile-first breakpoints (~768px, ~1024px), zero horizontal overflow.
- **Smooth animations:** `transition: var(--transition-normal)` on all state changes; every glow, scroll-reveal, and progress animation must be disabled under `prefers-reduced-motion` (fall back to final values).
- **Accessibility (a11y):** WCAG AA contrast in both light and dark modes; never communicate state by color alone; semantic HTML5 landmarks (`header`, `nav`, `main`, `section` with `aria-labelledby`, `footer`); logical DOM/focus order; full keyboard operability; skip-to-content link; `aria-live` regions for dynamic form feedback.
- **Mandatory visual feedback:** every click, hover, and submission triggers a visible state change.
- **Scroll behavior:** IntersectionObserver-driven reveal animations (subtle staggered fade-up) and sales progress animations (bars, ring, counting numbers) triggered on view.

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## 4. DELIVERABLE & OUTPUT FORMAT

- **File structure:** separate `index.html`, `style.css`, and `script.js`. The HTML contains exactly one script reference — `<script src="script.js" defer></script>` — with no other inline scripts and no inline styles.
- **Naming convention:** BEM (`block__element--modifier`) exclusively; never mix conventions. `.data-dashboard-animation` and `.workflow-diagram` must exist as specified.
- **Copy:** all user-facing copy in English, realistic and on-theme for a sales AI/CRM product — lorem ipsum is prohibited.
- **Completeness:** generate the full code on the first attempt — every section in 2.5 fully styled in both light and dark themes, with all interactions wired (nav smooth-scroll, FAQ toggle, form validation, theme persistence, scroll animations).
- **No unrequested placeholders:** every element present in the HTML must be styled and functional; do not ship stub sections.