<!DOCTYPE html>
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<head>
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<title>Model Tool - Landing Page Skills Test</title>
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<style>
/* ============================================
DESIGN SYSTEM CSS VARIABLES
Copied from brand-config.md + globals.css
============================================ */
:root {
/* === CORE BRAND COLORS === */
--color-primary: #6DC4AD; /* Teal - technology */
--color-secondary: #333333; /* Dark - primary CTA */
--color-accent: #EE7BB3; /* Pink - strategy */
--color-accent-alt: #A070A6; /* Purple - design */
--color-purple: #401877; /* Deep purple - premium */
/* === CTA COLORS === */
--color-cta: #DA85B2; /* Pink links */
--color-cta-submit: #E19379; /* Coral submit */
/* === STATISTICS ACCENTS === */
--color-stat-1: #73C1AE; /* Teal stat */
--color-stat-2: #EBA93D; /* Orange stat */
--color-stat-3: #A070A6; /* Purple stat */
/* === NEUTRAL COLORS === */
--color-foreground: #333333;
--color-muted: #A5A5A5;
--color-near-black: #1B1F24;
/* === SURFACE COLORS (LIGHT) === */
--surface-background: #E6EAF3;
--surface-card: #FFFFFF;
--surface-muted: #FAFAFA;
/* === SURFACE COLORS (DARK) === */
--surface-dark: #121D35;
--surface-dark-card: #1A2847;
--surface-dark-alt: #243356;
/* === BORDER COLORS === */
--color-border: #D0D5E0;
--color-border-light: #F1F1F1;
--color-divider: #E1E1E1;
/* === TYPOGRAPHY === */
--font-primary: 'Manrope', system-ui, sans-serif;
--font-body: 'Manrope', system-ui, sans-serif; /* Using Manrope as fallback since Graphik needs self-hosting */
--font-code: 'JetBrains Mono', monospace;
/* === LETTER SPACING === */
--ls-tight: -1.4px;
--ls-headline: -0.89px;
--ls-normal: 0;
--ls-wide: 0.4px;
--ls-wider: 2px;
--ls-widest: 4px;
/* === BORDER RADIUS (BRAND-CRITICAL) === */
--radius-badge: 2px;
--radius-card: 4px; /* NOT 8px! */
--radius-panel: 34px;
/* === SHADOWS === */
--shadow-card: 0 0 4px rgba(0,0,0,0.06);
--shadow-card-hover: 0 0 4px rgba(0,0,0,0.19);
--shadow-marquee: 0 2px 10px rgba(0,0,0,0.1);
--shadow-elevated: 0 8px 24px rgba(0,0,0,0.12);
/* === SPACING === */
--space-1: 4px;
--space-2: 8px;
--space-4: 16px;
--space-6: 24px;
--space-8: 32px;
--space-12: 48px;
--space-16: 64px;
--space-24: 96px;
}
/* === BASE RESET === */
*, *::before, *::after {
box-sizing: border-box;
margin: 0;
padding: 0;
}
body {
font-family: var(--font-body);
background: var(--surface-background);
color: var(--color-foreground);
line-height: 1.6;
}
/* === SECTION BASE === */
section {
padding: var(--space-24) 200px;
}
@media (max-width: 1200px) {
section {
padding: var(--space-16) var(--space-8);
}
}
/* ============================================
SECTION 1: HERO (2-Column Asymmetric)
Tests: Accent headline, letter-spacing,
shadow-marquee, NOT centered
============================================ */
.hero {
background: var(--surface-card);
box-shadow: var(--shadow-marquee);
min-height: 560px;
display: grid;
grid-template-columns: 55% 45%;
align-items: center;
gap: var(--space-12);
}
.hero-content {
padding-left: var(--space-16);
}
.hero-eyebrow {
font-family: var(--font-primary);
font-size: 9px;
font-weight: 700;
letter-spacing: var(--ls-widest);
text-transform: uppercase;
color: var(--color-muted);
margin-bottom: var(--space-4);
}
.hero-headline {
font-family: var(--font-primary);
font-size: 48px;
font-weight: 800;
letter-spacing: var(--ls-tight);
line-height: 1.1;
margin-bottom: var(--space-6);
}
/* Accent Headline Pattern: First word colored */
.hero-headline .accent {
color: var(--color-accent-alt);
}
.hero-headline .dark {
color: var(--color-foreground);
}
.hero-subheadline {
font-family: var(--font-body);
font-size: 18px;
font-weight: 400;
color: var(--color-muted);
margin-bottom: var(--space-8);
max-width: 480px;
}
.hero-cta-group {
display: flex;
gap: var(--space-4);
}
/* Button Hierarchy */
.btn {
font-family: var(--font-primary);
font-size: 14px;
font-weight: 600;
padding: 12px 24px;
border-radius: var(--radius-card);
border: none;
cursor: pointer;
transition: all 0.2s ease;
}
.btn-primary {
background: var(--color-secondary);
color: white;
}
.btn-primary:hover {
background: var(--color-near-black);
}
.btn-ghost {
background: transparent;
color: var(--color-secondary);
border: 1px solid var(--color-border);
}
.btn-ghost:hover {
border-color: var(--color-secondary);
}
.btn-accent {
background: var(--color-primary);
color: var(--color-secondary);
}
.btn-submit {
background: var(--color-cta-submit);
color: white;
}
.hero-visual {
background: var(--surface-dark);
border-radius: var(--radius-card);
padding: var(--space-6);
margin-right: var(--space-8);
}
.hero-code {
font-family: var(--font-code);
font-size: 13px;
color: #E6EAF3;
line-height: 1.8;
}
.hero-code .keyword { color: var(--color-primary); }
.hero-code .string { color: var(--color-accent); }
.hero-code .comment { color: var(--color-muted); }
/* ============================================
SECTION 2: PROBLEM/STAKES
Tests: Content Panel (34px radius)
============================================ */
.problem {
background: var(--surface-background);
}
.problem-panel {
background: var(--surface-muted);
border: 1px solid var(--color-border);
border-radius: var(--radius-panel);
padding: var(--space-12);
max-width: 800px;
margin: 0 auto;
}
/* Accent divider line above */
.problem-panel::before {
content: '';
display: block;
width: 60px;
height: 2px;
background: var(--color-accent-alt);
margin-bottom: var(--space-6);
}
.problem-headline {
font-family: var(--font-primary);
font-size: 38px;
font-weight: 700;
letter-spacing: var(--ls-headline);
color: var(--color-foreground);
margin-bottom: var(--space-8);
}
.problem-list {
list-style: none;
}
.problem-list li {
font-family: var(--font-body);
font-size: 17px;
color: var(--color-muted);
padding: var(--space-4) 0;
padding-left: var(--space-6);
position: relative;
display: flex;
align-items: center;
gap: var(--space-4);
}
.problem-list li i {
color: var(--color-stat-1);
width: 20px;
height: 20px;
}
/* ============================================
SECTION 3: MENTAL MODELS GRID
Tests: Feature Card (4px radius),
shadow-card-hover, NO emoji icons
============================================ */
.models {
background: var(--surface-background);
}
.models-header {
text-align: center;
margin-bottom: var(--space-12);
}
.models-headline {
font-family: var(--font-primary);
font-size: 38px;
font-weight: 700;
letter-spacing: var(--ls-headline);
margin-bottom: var(--space-4);
}
.models-headline .accent {
color: var(--color-accent);
}
.models-subheadline {
font-family: var(--font-body);
font-size: 17px;
color: var(--color-muted);
}
.models-grid {
display: grid;
grid-template-columns: repeat(3, 1fr);
gap: var(--space-8);
max-width: 1200px;
margin: 0 auto;
}
@media (max-width: 900px) {
.models-grid {
grid-template-columns: repeat(2, 1fr);
}
}
/* Feature Card Archetype */
.feature-card {
background: var(--surface-card);
border: 1px solid var(--color-border-light);
border-radius: var(--radius-card); /* 4px NOT 8px */
box-shadow: var(--shadow-card);
padding: var(--space-6);
transition: all 0.3s ease;
cursor: pointer;
}
/* BRAND-CRITICAL: Shadow intensifies on hover */
.feature-card:hover {
box-shadow: var(--shadow-card-hover);
transform: translateY(-4px);
}
.feature-card-icon {
width: 48px;
height: 48px;
background: var(--surface-background);
border-radius: var(--radius-card);
display: flex;
align-items: center;
justify-content: center;
margin-bottom: var(--space-4);
}
.feature-card-icon i {
width: 24px;
height: 24px;
color: var(--color-primary);
}
.feature-card-title {
font-family: var(--font-primary);
font-size: 21px;
font-weight: 600;
color: var(--color-accent);
margin-bottom: var(--space-2);
}
.feature-card-description {
font-family: var(--font-body);
font-size: 15px;
color: var(--color-muted);
line-height: 1.5;
margin-bottom: var(--space-4);
}
.feature-card-usecase {
font-family: var(--font-primary);
font-size: 12px;
font-weight: 500;
color: var(--color-foreground);
background: var(--surface-background);
padding: 4px 8px;
border-radius: var(--radius-badge);
display: inline-block;
}
/* Link Text Pattern */
.link-text {
font-family: var(--font-primary);
font-size: 9px;
font-weight: 700;
letter-spacing: var(--ls-wider);
text-transform: uppercase;
text-decoration: none;
color: var(--color-cta);
opacity: 0;
transform: translateY(10px);
transition: all 0.3s ease;
}
.feature-card:hover .link-text {
opacity: 1;
transform: translateY(0);
}
/* ============================================
SECTION 4: STATS MODULE (Dark Band)
Tests: Dark surfaces, 3 stat colors,
letter-spacing
============================================ */
.stats {
background: var(--surface-dark);
padding: 83px 200px;
}
.stats-grid {
display: flex;
justify-content: space-between;
align-items: center;
}
.stat-item {
flex: 1;
text-align: center;
}
.stat-divider {
width: 1px;
height: 80px;
background: rgba(151, 151, 151, 0.3);
}
.stat-number {
font-family: var(--font-primary);
font-size: 38px;
font-weight: 400;
letter-spacing: var(--ls-headline);
line-height: 42px;
}
.stat-number.stat-1 { color: var(--color-stat-1); }
.stat-number.stat-2 { color: var(--color-stat-2); }
.stat-number.stat-3 { color: var(--color-stat-3); }
.stat-description {
font-family: var(--font-primary);
font-size: 17px;
font-weight: 400;
letter-spacing: var(--ls-wide);
line-height: 27px;
color: white;
margin-top: var(--space-4);
}
/* ============================================
SECTION 5: DEMO (Code Preview)
Tests: Dark surface cards, font-code,
tabs styling
============================================ */
.demo {
background: var(--surface-background);
}
.demo-header {
text-align: center;
margin-bottom: var(--space-8);
}
.demo-headline {
font-family: var(--font-primary);
font-size: 38px;
font-weight: 700;
letter-spacing: var(--ls-headline);
margin-bottom: var(--space-4);
}
.demo-tabs {
display: flex;
justify-content: center;
gap: var(--space-2);
margin-bottom: var(--space-6);
}
.demo-tab {
font-family: var(--font-primary);
font-size: 14px;
font-weight: 500;
padding: 8px 16px;
background: var(--surface-muted);
border: 1px solid var(--color-border);
border-radius: var(--radius-card);
cursor: pointer;
transition: all 0.2s ease;
}
.demo-tab.active {
background: var(--color-primary);
color: white;
border-color: var(--color-primary);
}
.demo-panel {
background: var(--surface-dark);
border-radius: var(--radius-card);
max-width: 900px;
margin: 0 auto;
overflow: hidden;
}
.demo-panel-header {
background: var(--surface-dark-alt);
padding: var(--space-4) var(--space-6);
display: flex;
align-items: center;
gap: var(--space-2);
}
.demo-dot {
width: 12px;
height: 12px;
border-radius: 50%;
}
.demo-dot.red { background: #FF5F56; }
.demo-dot.yellow { background: #FFBD2E; }
.demo-dot.green { background: #27C93F; }
.demo-code {
padding: var(--space-6);
font-family: var(--font-code);
font-size: 14px;
color: #E6EAF3;
line-height: 1.8;
overflow-x: auto;
}
.demo-code .keyword { color: var(--color-primary); }
.demo-code .string { color: var(--color-accent); }
.demo-code .comment { color: var(--color-muted); }
.demo-code .property { color: var(--color-stat-2); }
/* ============================================
SECTION 6: STEPS (How It Works)
Tests: Badge (2px radius), numbered steps
============================================ */
.steps {
background: var(--surface-card);
}
.steps-header {
text-align: center;
margin-bottom: var(--space-12);
}
.steps-headline {
font-family: var(--font-primary);
font-size: 38px;
font-weight: 700;
letter-spacing: var(--ls-headline);
}
.steps-grid {
display: grid;
grid-template-columns: repeat(4, 1fr);
gap: var(--space-8);
max-width: 1000px;
margin: 0 auto;
}
@media (max-width: 800px) {
.steps-grid {
grid-template-columns: repeat(2, 1fr);
}
}
.step-item {
text-align: center;
}
/* Status Badge Archetype */
.step-badge {
display: inline-flex;
align-items: center;
justify-content: center;
width: 40px;
height: 40px;
background: var(--color-primary);
border-radius: var(--radius-badge); /* 2px */
font-family: var(--font-primary);
font-size: 18px;
font-weight: 700;
color: white;
margin-bottom: var(--space-4);
}
.step-title {
font-family: var(--font-primary);
font-size: 17px;
font-weight: 600;
color: var(--color-foreground);
margin-bottom: var(--space-2);
}
.step-description {
font-family: var(--font-body);
font-size: 14px;
color: var(--color-muted);
}
/* ============================================
SECTION 7: CTA BANNER (Dark)
Tests: Dark band CTA, button hierarchy,
submit color
============================================ */
.cta {
background: var(--surface-dark);
text-align: center;
}
.cta-headline {
font-family: var(--font-primary);
font-size: 38px;
font-weight: 700;
letter-spacing: var(--ls-headline);
color: white;
margin-bottom: var(--space-4);
}
.cta-subheadline {
font-family: var(--font-body);
font-size: 17px;
color: rgba(255,255,255,0.7);
margin-bottom: var(--space-8);
}
.cta-buttons {
display: flex;
justify-content: center;
gap: var(--space-4);
}
.cta .btn-submit {
padding: 16px 32px;
font-size: 16px;
}
.cta .btn-ghost {
color: white;
border-color: rgba(255,255,255,0.3);
}
.cta .btn-ghost:hover {
border-color: white;
}
/* ============================================
VALIDATION PANEL (for testing)
============================================ */
.validation {
background: var(--surface-muted);
padding: var(--space-8);
border-top: 2px solid var(--color-accent-alt);
}
.validation h3 {
font-family: var(--font-primary);
font-size: 14px;
font-weight: 700;
letter-spacing: var(--ls-wider);
text-transform: uppercase;
color: var(--color-accent-alt);
margin-bottom: var(--space-4);
}
.validation-grid {
display: grid;
grid-template-columns: repeat(3, 1fr);
gap: var(--space-6);
}
.validation-item {
font-family: var(--font-code);
font-size: 12px;
}
.validation-item .label {
color: var(--color-muted);
}
.validation-item .value {
color: var(--color-foreground);
font-weight: 500;
}
.validation-item .pass {
color: var(--color-stat-1);
}
.validation-item .fail {
color: #D52C2C;
}
</style>
</head>
<body>
<!-- SECTION 1: HERO (2-Column Asymmetric) -->
<section class="hero">
<div class="hero-content">
<p class="hero-eyebrow">THINK-MCP TOOLKIT</p>
<h1 class="hero-headline">
<span class="accent">Mental Models</span><br>
<span class="dark">for Structured Thinking</span>
</h1>
<p class="hero-subheadline">
Stop going in circles. Apply battle-tested frameworks used by top engineers, consultants, and decision-makers to reach clarity faster.
</p>
<div class="hero-cta-group">
<button class="btn btn-primary">Explore Models</button>
<button class="btn btn-ghost">See Examples</button>
</div>
</div>
<div class="hero-visual">
<pre class="hero-code"><span class="comment">// Apply First Principles thinking</span>
{
<span class="keyword">"modelName"</span>: <span class="string">"first_principles"</span>,
<span class="keyword">"problem"</span>: <span class="string">"Reduce cloud costs by 50%"</span>,
<span class="keyword">"steps"</span>: [
<span class="string">"Identify fundamentals"</span>,
<span class="string">"Question assumptions"</span>,
<span class="string">"Rebuild from ground up"</span>
]
}</pre>
</div>
</section>
<!-- SECTION 2: PROBLEM/STAKES -->
<section class="problem">
<div class="problem-panel">
<h2 class="problem-headline">Sound Familiar?</h2>
<ul class="problem-list">
<li><i data-lucide="clock"></i> Debugging the same issue for hours without progress</li>
<li><i data-lucide="brain"></i> Analysis paralysis when prioritizing tasks</li>
<li><i data-lucide="message-circle"></i> Explaining problems repeatedly but never solving them</li>
</ul>
</div>
</section>
<!-- SECTION 3: MENTAL MODELS GRID -->
<section class="models">
<div class="models-header">
<h2 class="models-headline">
<span class="accent">6 Proven</span> Mental Models
</h2>
<p class="models-subheadline">Choose the right framework for your problem type</p>
</div>
<div class="models-grid">
<div class="feature-card">
<div class="feature-card-icon">
<i data-lucide="layers"></i>
</div>
<h3 class="feature-card-title">First Principles</h3>
<p class="feature-card-description">Break down to fundamentals, rebuild from scratch. Question every assumption.</p>
<span class="feature-card-usecase">Cost Optimization</span>
<a href="#" class="link-text">Learn More ></a>
</div>
<div class="feature-card">
<div class="feature-card-icon">
<i data-lucide="pie-chart"></i>
</div>
<h3 class="feature-card-title">Pareto Principle</h3>
<p class="feature-card-description">80% of results come from 20% of causes. Focus on what matters most.</p>
<span class="feature-card-usecase">Prioritization</span>
<a href="#" class="link-text">Learn More ></a>
</div>
<div class="feature-card">
<div class="feature-card-icon">
<i data-lucide="message-circle"></i>
</div>
<h3 class="feature-card-title">Rubber Duck</h3>
<p class="feature-card-description">Explain the problem out loud step-by-step to find the answer yourself.</p>
<span class="feature-card-usecase">Debugging</span>
<a href="#" class="link-text">Learn More ></a>
</div>
<div class="feature-card">
<div class="feature-card-icon">
<i data-lucide="scale"></i>
</div>
<h3 class="feature-card-title">Opportunity Cost</h3>
<p class="feature-card-description">What are you giving up by choosing this path? Evaluate trade-offs clearly.</p>
<span class="feature-card-usecase">Trade-offs</span>
<a href="#" class="link-text">Learn More ></a>
</div>
<div class="feature-card">
<div class="feature-card-icon">
<i data-lucide="alert-triangle"></i>
</div>
<h3 class="feature-card-title">Error Propagation</h3>
<p class="feature-card-description">Understand how errors compound through a system. Prevent cascading failures.</p>
<span class="feature-card-usecase">Risk Analysis</span>
<a href="#" class="link-text">Learn More ></a>
</div>
<div class="feature-card">
<div class="feature-card-icon">
<i data-lucide="scissors"></i>
</div>
<h3 class="feature-card-title">Occam's Razor</h3>
<p class="feature-card-description">The simplest explanation is usually correct. Cut through complexity.</p>
<span class="feature-card-usecase">Simplification</span>
<a href="#" class="link-text">Learn More ></a>
</div>
</div>
</section>
<!-- SECTION 4: STATS MODULE (Dark Band) -->
<section class="stats">
<div class="stats-grid">
<div class="stat-item">
<p class="stat-number stat-1">50%+</p>
<p class="stat-description">Cost Savings<br>with First Principles</p>
</div>
<div class="stat-divider"></div>
<div class="stat-item">
<p class="stat-number stat-2">70%</p>
<p class="stat-description">Ticket Reduction<br>with Pareto Analysis</p>
</div>
<div class="stat-divider"></div>
<div class="stat-item">
<p class="stat-number stat-3">10x</p>
<p class="stat-description">Faster Debugging<br>with Rubber Duck</p>
</div>
</div>
</section>
<!-- SECTION 5: DEMO -->
<section class="demo">
<div class="demo-header">
<h2 class="demo-headline">See It In Action</h2>
</div>
<div class="demo-tabs">
<button class="demo-tab active">First Principles</button>
<button class="demo-tab">Rubber Duck</button>
<button class="demo-tab">Pareto</button>
</div>
<div class="demo-panel">
<div class="demo-panel-header">
<span class="demo-dot red"></span>
<span class="demo-dot yellow"></span>
<span class="demo-dot green"></span>
</div>
<pre class="demo-code"><span class="comment">// Cloud Infrastructure Cost Analysis</span>
{
<span class="property">"modelName"</span>: <span class="string">"first_principles"</span>,
<span class="property">"problem"</span>: <span class="string">"How can we reduce cloud costs by 50%?"</span>,
<span class="property">"steps"</span>: [
<span class="string">"Identify fundamentals: compute, storage, network"</span>,
<span class="string">"Question assumptions: Do we need 24/7 uptime?"</span>,
<span class="string">"Break down costs: 60% compute, 25% storage, 15% network"</span>,
<span class="string">"Rebuild: spot instances, auto-scaling, lifecycle policies"</span>
],
<span class="property">"conclusion"</span>: <span class="string">"55% savings achievable through spot instances (30%), auto-scaling (15%), tiered storage (10%)"</span>
}</pre>
</div>
</section>
<!-- SECTION 6: STEPS -->
<section class="steps">
<div class="steps-header">
<h2 class="steps-headline">How It Works</h2>
</div>
<div class="steps-grid">
<div class="step-item">
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