Landing Page Builder

Build high-quality, deployment-ready landing pages by extracting branding and content from client websites and documents, then producing a responsive HTML/CSS page with verified images and clean structure.

This skill exists because landing pages require careful coordination of branding, content, images, and responsive design — and the most common failure mode is treating source documents as text-only, missing the images that carry half the marketing message.

The Golden Rules

1. Images are content, not decoration. When a marketing PDF shows a classroom photo next to a paragraph about student wellbeing, that photo IS the message. A landing page without those images is incomplete regardless of how good the copy is. Extract and integrate images in the first pass, every time.

2. Keep styling maintainable within the chosen stack. For a static page, put CSS in styles.css, not inline in HTML. For an existing framework project, preserve its established CSS modules, component styles, utility classes, or token system. Do not migrate styling architecture without a reason.

3. Never invent content. Use only what the source document provides. Do not make up image captions, visual directions, testimonial quotes, statistics, or client names. If content is missing, flag it and ask — do not fill gaps with AI-generated placeholder copy.

4. Use the frontend stack deliberately. Before coding, load the available supporting skills named below. They are complementary roles, not duplicate instructions to paste together blindly. If a named skill is unavailable, continue with the available stack and record the gap; never pretend it ran.

Frontend Skill Stack (Required Routing)

The screenshot-provided frontend tools map to this landing-page workflow as follows. Read references/frontend-skill-stack.md for the complete routing and conflict rules.

frontend-design — establish the subject-specific visual thesis, typography, palette, layout concept, signature element, and motion intent. Use for new builds and meaningful visual reshaping.
design-taste-frontend — apply anti-slop implementation discipline, responsive layout mechanics, accessible interaction states, component choices, performance checks, and the final design pre-flight.
imagegen-frontend-web — use when generated visual references would materially reduce ambiguity: unknown visual direction, image-led campaigns, custom illustration/art direction, or a user asking for mockups. It generates references; it does not replace real brand assets or implementation.
design-taste-frontend-v1 — legacy fallback only. Use it when an existing project explicitly depends on v1 behaviour; do not load v1 and current Design Taste together.
imagegen-frontend-mobile — not part of a website landing-page build. Use only for a separate mobile-app screen deliverable, never as the page's responsive-web design step.
Aidesigner Frontend — if this exact skill becomes installed and discoverable, use it as an optional second critique of the approved art direction. It is not currently assumed available and must never block the workflow.

Do not run every tool for ceremony. The minimum new-landing-page stack is frontend-design + current design-taste-frontend + landing-page. Add imagegen-frontend-web when visual-reference generation is justified. Responsive mobile web remains part of the implementation and QA; it is not delegated to the mobile-app image skill.

Required pre-code design gate

Before implementation, produce an internal build brief containing:

the page's audience, single conversion goal, and source-of-truth content;
one coherent visual thesis tied to the actual subject, not a generic SaaS aesthetic;
palette and typography roles with licensing/availability checked;
section order and the job of every section;
asset map: preserve, obtain, generate, or omit;
one signature visual idea and a restrained motion plan;
desktop, tablet, and mobile behaviour for the first fold and complex sections;
explicit avoid-list based on the brand and reference audit.

If the user supplied a reference, extract principles without cloning its identity. If the source is an existing client site or approved template, preserve approved copy, brand assets, component grammar, and section order unless the user explicitly authorises a redesign.

Anti-Slop Rules (MANDATORY)

These patterns make AI-generated pages look cheap and generic. NEVER use them:

Banned Copy Patterns

"Revolutionize", "Transform your", "Unleash the power of", "Leverage", "Empower"
"Cutting-edge", "Next-generation", "State-of-the-art", "Best-in-class"
"Seamlessly", "Effortlessly", "Supercharge"
"In today's fast-paced world", "In an era of"
Starting paragraphs with "Imagine..." or "Picture this..."
Generic CTAs like "Learn More" or "Get Started" without context — use specific CTAs: "Get Instant Quote", "Book a Demo", "See Pricing"

Banned Visual Patterns

Gradient mesh blobs or aurora backgrounds (the #1 tell of AI-generated pages)
Purple-to-blue gradients as primary design language
Floating 3D objects with no connection to the product
Generic abstract geometric patterns as hero backgrounds
Overly rounded cards (border-radius > 1.5rem) with heavy drop shadows
Identical card layouts repeated 3+ times with only icon changes
Stock photo hero images that don't match the business (e.g., generic handshake photos)

Banned Code Patterns

Inline styles in HTML elements
Using !important in CSS (except for utility overrides)
Hardcoded pixel values for font sizes — use clamp() or rem
Missing alt attributes on images
Using <div> when semantic elements exist (<section>, <article>, <nav>, <header>, <footer>)

Workflow Overview

The build follows seven phases. Resolve obvious facts from supplied sources instead of asking the user to repeat them. Ask only when a missing decision materially changes the result.

Context & Research — Read project/client instructions, meeting decisions, brief, approval state, live brand, references, copy, and design grammar
Content Extraction — Pull all approved text and images from supplied sources
Asset Verification — Build a provenance-aware inventory of usable media
Frontend Direction & Blueprint — Apply Frontend Design and Design Taste; lock conversion flow, tokens, responsive behaviour, assets, and acceptance checks; generate web references only when justified
Build — Use the simplest stack that satisfies the brief and implement complete production code
Browser QA — Build/test, inspect screenshots at desktop/tablet/mobile, fix defects, and repeat
Deploy & Live Verify — Deploy only when requested, then inspect the real URL and report the verified alias

Phase 1: Context & Research

Before writing code, read the nearest project/client instructions, approved brief, meeting decisions, and source links. Then understand the client's existing brand and collect every asset you'll need.

Brand Extraction

Fetch the client's website and extract:

Colors: Inspect CSS custom properties, computed styles on key elements (headings, buttons, backgrounds, accents). Record as hex values.
Fonts: Check Google Fonts links, font-family declarations, and @font-face rules. Do not assume — many sites use fonts that look like common ones but aren't.
Logo: Find the logo image URL (usually in the header or footer). Get the highest-resolution version available.
Design language: Note spacing patterns, border-radius usage, shadow styles, section background treatments.

Asset Collection

This is critical. Crawl the site's image directories to build a complete catalog:

Fetch the homepage and key pages, extract all <img> src attributes and CSS background-image URLs
Look for patterns in the image paths (e.g., /wp-content/uploads/YYYY/MM/ for WordPress sites)
For each image, record:
- Full URL
- Descriptive name (what does the image show?)
- Dimensions (from the filename or by fetching headers)
- Category (photo, illustration, icon, logo, sticker)

Save this catalog — you'll reference it throughout the build.

Example catalog entry:

URL: https://example.com/wp-content/uploads/2023/08/image-13-1024x768.jpeg
Description: Students working together in classroom
Dimensions: 1024x768
Category: photo
Use for: Problem section, Gallery

Phase 2: Content Extraction

When the user provides a PDF, Word doc, or other content document:

Text Content

Extract all headings, body copy, statistics, quotes, and CTAs
Preserve the document's section structure — it usually maps to page sections
Note any specific phrasing that should be kept verbatim (taglines, endorsed claims, testimonial quotes)

Image Content (DO NOT SKIP THIS)

Identify every image in the document
For each image, determine what it shows and which section it belongs to
Match document images to actual hosted URLs from the client's website (from your Phase 1 catalog)
If a document image doesn't match any cataloged URL, note it as "needs source" and ask the user

The reason this matters: marketing documents use images strategically. A PDF that shows character illustrations alongside brain science content is telling you those illustrations belong in the Brain Science section of the landing page. Ignoring them produces a text-heavy page that misses the point.

Phase 3: Image Catalog & Verification

Before building anything, verify every image URL you plan to use.

Verification Process

For each image URL:

Fetch the URL and check the HTTP status code
A 200 response with correct content-type means it's good
A 404 or other error means the URL is wrong

Fixing Broken URLs

When an image URL returns 404:

Go back to the live site and search for the image by partial filename
Fetch the page source that originally contained the image
Look for the correct path — filenames often have slight variations (e.g., GYM_Kid-at-Desk-300x295.png vs GYM_Kid_AtDesk-222x300.png)
Never guess filenames. Always verify against the actual server.

Final Catalog

Produce a verified list mapping each content section to its images:

Hero: logo.png (verified), character-teaching.png (verified), sticker-owl.png (verified)
Problem: classroom-photo.jpeg (verified)
Brain Science: character-1.png (verified), character-2.png (verified), character-3.png (verified), character-4.png (verified)
Shift: school-kits.jpg (verified), home-products.jpeg (verified)
Gallery: classroom.jpeg, confidence.png, founders.jpeg (all verified)

Phase 4: Frontend Direction & Blueprint

Load the required frontend skill stack and complete the pre-code design gate from the top of this file. Decide whether generated web reference images are useful. Lock the conversion flow, section jobs, visual tokens, media plan, motion intent, responsive behaviour, and acceptance checks before implementation.

Self-reject the direction if it could be reused unchanged for an unrelated client. One coherent art direction is better than averaging several skill aesthetics.

Phase 5: Build

Choose the implementation stack

Do not force every landing page into one technology. Choose based on the actual project:

Existing repository or template: preserve its framework, runtime, components, routing, and asset pipeline unless migration is explicitly requested.
Static campaign page: semantic HTML, external CSS, and minimal JavaScript are preferred when no component architecture or app behaviour is needed.
Component-led or interactive page: React/Vite, Next.js, or the repository's existing stack is valid when reusable components, integrations, state, or complex motion justify it.
Verify dependencies before importing them. Prefer existing project libraries over adding fashionable packages.

The old default below applies only to a genuinely new static page.

Static-page file structure

Keep it simple — a single directory with two files:

project-name/
├── index.html
└── styles.css

For a simple static page, avoid unnecessary build tools and framework dependencies. This is a default, not a prohibition against using the project's real stack.

Design System Setup (styles.css)

Start the stylesheet with the extracted brand system:

:root {
  /* Brand colors — extracted from client site */
  --primary: #0f4661;
  --primary-dark: #0a3347;
  --accent: #f37b78;
  --accent-hover: #e06560;
  /* ... all brand colors as custom properties */

  /* Neutral scale — always define these */
  --gray-50: #f8f9fa;
  --gray-100: #f0f2f5;
  --gray-200: #e2e5ea;
  --gray-300: #c8cdd5;
  --gray-400: #9ca3b0;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Utility tokens */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.16);
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;

  /* Transitions */
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

body {
  font-family: 'ExtractedFont', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--gray-700);
  background: var(--white, #ffffff);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

Typography Rules (CRITICAL)

Bad typography is the #1 reason AI pages look amateur. Follow these strictly:

/* Minimum sizes — NEVER go below these */
body { font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem); } /* 16-18px */
h1 { font-size: clamp(2.25rem, 1.5rem + 3vw, 4rem); }       /* 36-64px */
h2 { font-size: clamp(1.75rem, 1.25rem + 2vw, 3rem); }       /* 28-48px */
h3 { font-size: clamp(1.25rem, 1rem + 1vw, 1.75rem); }       /* 20-28px */

/* Line heights */
h1, h2 { line-height: 1.15; letter-spacing: -0.02em; }
h3 { line-height: 1.3; }
p { line-height: 1.7; max-width: 65ch; } /* Readable line length */

/* Font weights — use contrast */
h1 { font-weight: 500; }  /* Start restrained; use heavier only when the brand calls for it */
h2 { font-weight: 500; }
h3 { font-weight: 500; }
body { font-weight: 400; } /* Regular for body */

Use BEM naming: .section__element--modifier. This keeps specificity flat and styles predictable.

Animation & Motion

Add subtle scroll-reveal animations. These make pages feel polished without being distracting:

/* Scroll reveal — add .reveal class to sections */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children with delay classes */
.reveal--delay-1 { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }

/* Button hover — subtle lift */
.btn { transition: transform var(--transition), box-shadow var(--transition); }
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

/* Image hover for galleries */
.gallery__item img { transition: transform 0.5s ease; }
.gallery__item:hover img { transform: scale(1.05); }

Add this JavaScript at the bottom for scroll reveals:

const observer = new IntersectionObserver((entries) => {
  entries.forEach(entry => {
    if (entry.isIntersecting) {
      entry.target.classList.add('revealed');
    }
  });
}, { threshold: 0.1 });
document.querySelectorAll('.reveal').forEach(el => observer.observe(el));

Conversion structure, not a section template

Choose sections because each answers a real conversion question. Do not mechanically include all sections or repeat identical card rows. A common flow is:

Header — Sticky nav with logo, section links, and primary CTA button
Hero — Headline, subheadline, CTA buttons, and a visual element (character illustration, product image, or background)
Trust Bar — Stats, endorsements, partner logos (builds immediate credibility)
Problem — Pain points the audience faces. Use a 2-column grid: text on one side, supporting photo on the other. Images here make the problem feel real, not abstract.
Approach/Solution — How the product/service addresses the problem. Cards or feature blocks work well.
Vision — The desired future state. Emotionally driven, often with a background image.
Evidence/Science — Data, research, methodology. If character illustrations or graphics exist, place them here — they make dry content approachable.
Testimonials — Social proof from real users. Cards with quotes, names, and roles.
Offer/Pricing — What the user gets. If there are two tiers, use a "Two Paths" comparison layout. Highlight the recommended option.
Gallery — If images are available, a masonry or grid gallery showcases the product/service in action.
Contact/CTA — Final conversion section. Form, email, phone, or booking link.
Footer — Logo, links, copyright, social media.

Image Integration Rules

This is where most landing page builds fail. Follow these rules:

Problem section: Always pair problem text with a relevant photo (classroom, workplace, real-world context). A 2-column grid (60% text, 40% image) works well.
Evidence/Science section: If the client has character illustrations, mascots, or infographics, place them here. Use a horizontal flex row showing 3-4 characters with labels.
Offer section: Show product photos or kit photos alongside the offer description.
Gallery: Use a CSS grid (3 columns desktop, 2 tablet, 1 mobile) with object-fit: cover and consistent heights. Add hover zoom effects.

The general principle: every section that makes a claim should have a supporting image. "Our program is used in real classrooms" needs a classroom photo. "Kids love our characters" needs character illustrations.

Responsive Design

Build mobile-first with these breakpoints:

/* Tablet */
@media (max-width: 1024px) {
  /* 2-column grids → stack or reduce
     Character images → smaller (100px)
     Gallery → 2 columns */
}

/* Mobile */
@media (max-width: 768px) {
  /* Everything single column
     Character images → 80px
     Gallery → single column
     Hamburger menu active
     Hero → stack vertically */
}

Key responsive patterns:

Side-by-side grids stack vertically on mobile
Image heights reduce at each breakpoint (desktop 300px → tablet 260px → mobile 220px)
Font sizes use clamp() for fluid scaling
Container padding increases slightly on mobile for comfortable reading

HTML Template

The HTML should follow this structure:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>[Page Title] — [Brand Name]</title>
  <link rel="preconnect" href="https://fonts.googleapis.com">
  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
  <link href="https://fonts.googleapis.com/css2?family=[Font]:[weights]&display=swap" rel="stylesheet">
  <link rel="stylesheet" href="styles.css">
</head>
<body>
  <!-- Each section clearly commented -->
  <!-- ==================== HEADER ==================== -->
  <header class="header">...</header>

  <!-- ==================== HERO ==================== -->
  <section class="hero">...</section>

  <!-- ... remaining sections ... -->

  <!-- Minimal JS for hamburger menu and smooth scroll -->
  <script>
    // Hamburger toggle
    // Smooth scroll for anchor links
    // Sticky header shadow on scroll
  </script>
</body>
</html>

Phase 6: Browser QA

After building, verify everything works before presenting to the user. This catches the silent failures (broken images, layout breaks) that undermine trust.

Image Verification

Use the preview server to check every image:

Start a local server (npx serve or equivalent)
Take a screenshot to check overall appearance
For each image, check if it loaded:
- In the preview, evaluate: document.querySelectorAll('img').forEach(img => { if (img.naturalWidth === 0) console.log('BROKEN:', img.src) })
- Any image with naturalWidth === 0 is broken — fix the URL
Force reload (location.reload()) before each screenshot to avoid stale cache

Responsive and interaction check

Resize the viewport and verify at three widths:

Desktop (1440px or the user's actual viewport): verify hierarchy, section rhythm, media crops, and maximum line lengths
Tablet (768px): verify deliberate reflow rather than accidental wrapping
Mobile (390px and 375px where practical): verify first fold, menu, CTA visibility, readable type, media crops, and touch targets
Exercise menus, accordions, forms, anchors, carousels, and reduced-motion behaviour rather than checking screenshots alone
Check horizontal overflow, console errors, broken media, focus visibility, and keyboard operation

Fix Before Presenting

If any image is broken or any layout is wrong, fix it BEFORE showing the user. The user should see a polished result, not a work-in-progress. The typical fixes:

Broken image → fetch correct URL from live site
Layout overflow → add overflow: hidden or adjust grid
Text overflow → reduce font size at breakpoint

Phase 7: Deploy & Live Verify

Vercel Deployment

When the user wants to deploy:

cd project-directory
npx vercel --yes --name [project-name] --prod

If the user wants a specific subdomain, use --name to set it (e.g., --name growyourmind-redesign creates growyourmind-redesign.vercel.app).

Post-Deployment Verification

After deployment, verify the live URL:

Fetch the exact production/preview alias and confirm status, title, and expected page marker
Open the live URL in a real browser and capture desktop plus mobile screenshots
Check images/video, navigation, forms, console errors, overflow, and responsive behaviour on the deployed build
Confirm the alias points to this deployment; HTTP 200 alone is not proof that the correct project/version is live
Never claim deployment success from CLI output alone when browser verification is still blocked

Common Pitfalls & How to Avoid Them

These are lessons from real projects. Each one caused a round of rework when missed.

Pitfall	Prevention
Treating PDFs as text-only	Extract images in the same pass as text. Map each image to its section.
Guessing image filenames	Never construct URLs from memory. Fetch the live page and extract actual `src` attributes.
Not verifying image URLs	Check every URL before using it. A 404 in production looks unprofessional.
Stale preview cache	Force `location.reload()` before every verification screenshot.
Missing responsive images	Test at 375px, 768px, and 1280px. Images that look fine at desktop can overflow on mobile.
Text-heavy sections	If a section makes a visual claim, it needs an image. "Real classroom results" without a classroom photo falls flat.
Assuming the font	Check the live site's actual font-family. Poppins and Inter look similar but aren't interchangeable.

Reference Files

For detailed section templates and CSS patterns, see:

references/section-patterns.md — HTML/CSS templates for each section type
references/verification-checklist.md — Step-by-step QA checklist

SEO Essentials

Every landing page MUST include these. Missing them means the page is invisible to search engines:

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>[Primary Keyword] — [Brand Name] | [Value Prop]</title>
  <meta name="description" content="[150-160 char description with primary keyword naturally included]">
  <link rel="canonical" href="https://[domain]/[page]">

  <!-- Open Graph for social sharing -->
  <meta property="og:title" content="[Title]">
  <meta property="og:description" content="[Description]">
  <meta property="og:image" content="[Hero image URL — 1200x630px ideal]">
  <meta property="og:url" content="[Canonical URL]">
  <meta property="og:type" content="website">

  <!-- Favicon -->
  <link rel="icon" href="[favicon URL]" type="image/png">
</head>

Additional SEO rules:

Use ONE <h1> per page (the hero headline)
Use <h2> for section titles, <h3> for subsection titles — proper hierarchy
All images must have descriptive alt attributes (not "image1" or "photo")
Use semantic HTML: <header>, <nav>, <main>, <section>, <footer>
Add loading="lazy" to images below the fold
Add loading="eager" to the hero image

Performance Rules

These prevent the page from being slow:

Images: Use Unsplash/source images with w= parameter for proper sizing. Never load a 4000px image for a 600px container.
Fonts: Maximum 2 font families. Load only the weights you use (e.g., wght@400;600;700 not [email protected]).
CSS: For a new static page, keep styles in one external file and avoid adding a CSS framework without a real benefit. In an existing project, preserve the established styling system.
JavaScript: Use minimal JavaScript for a static page. React/Next/Vite are valid when the existing repository or required interactions justify them; do not add a framework merely to render static copy.
Above the fold: The hero section must render without waiting for external resources. Use font-display: swap and preconnect to Google Fonts.

Quick Start Checklist

When you receive a landing page request, run through this mentally:

Perguntar na sua IA favorita

Documentação