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feat(examples): add ease-nod — element nods up and down once #17499

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feat(examples): add ease-nod — element nods up and down once #17499

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32 changes: 32 additions & 0 deletions submissions/examples/ease-nod/README.md
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# ease-nod

## What does it do?
Element bobs downward then back up, like nodding in agreement. One-shot 0.4s animation perfect for confirmation micro-interactions.

## Features
- `translateY(0) → translateY(6px) → translateY(0)`
- One-shot animation (runs once per hover)
- 0.4s ease-in-out timing
- Pure CSS, no JavaScript

## Usage
```css
.element:hover {
animation: nod 0.4s ease-in-out;
}

@keyframes nod {
0% { transform: translateY(0); }
50% { transform: translateY(6px); }
100% { transform: translateY(0); }
}
```

## Browser Support
- Chrome 1+, Firefox 3.5+, Safari 3.1+

## Tech Stack
- HTML + CSS only, no JavaScript

## Preview
Open `demo.html` directly in browser.
34 changes: 34 additions & 0 deletions submissions/examples/ease-nod/demo.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>ease-nod — EaseMotion CSS</title>
<link rel="stylesheet" href="style.css">
<style>
body { padding: 2rem; background: #0f0f0f; color: #d1d5db; font-family: system-ui, sans-serif; max-width: 700px; margin: 0 auto; text-align: center; }
h1 { color: #ffffff; font-size: 1.75rem; margin-bottom: 0.25rem; }
p.subtitle { line-height: 1.7; margin-bottom: 2rem; color: #9ca3af; }
section { background: #1a1a1a; border: 1px solid #2a2a2a; border-radius: 12px; padding: 1.5rem; margin-bottom: 1.5rem; }
h2 { color: #ffffff; font-size: 1.1rem; margin: 0 0 0.5rem; }
.sec-desc { font-size: 0.85rem; color: #9ca3af; margin-bottom: 1rem; }
code { background: #2a2a2a; padding: 0.15em 0.4em; border-radius: 4px; font-size: 0.9em; }
</style>
</head>
<body>
<h1>ease-nod</h1>
<p class="subtitle">Subtle vertical nod — like nodding in agreement. Great for confirmation micro-interactions.</p>

<section>
<h2>Demo</h2>
<p class="sec-desc">The card nods once on hover</p>
<div class="nod-card">Yes!</div>
<p style="color:#6b7280;font-size:0.8rem;margin-top:1rem;">Hover again to replay.</p>
</section>

<section>
<h2>How It Works</h2>
<p>A one-shot <code>translateY(0) → translateY(6px) → translateY(0)</code> animation triggered by <code>:hover</code>, running for 0.4s.</p>
</section>
</body>
</html>
29 changes: 29 additions & 0 deletions submissions/examples/ease-nod/style.css
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/* ============================================================
EaseMotion CSS — ease-nod
Subtle vertical nod animation
============================================================ */

.nod-card {
width: 240px;
height: 120px;
margin: 1.5rem auto;
display: flex;
align-items: center;
justify-content: center;
background: linear-gradient(135deg, #6366f1, #a78bfa);
border-radius: 14px;
font-weight: 600;
color: #ffffff;
font-size: 1.1rem;
cursor: pointer;
}

.nod-card:hover {
animation: nod 0.4s ease-in-out;
}

@keyframes nod {
0% { transform: translateY(0); }
50% { transform: translateY(6px); }
100% { transform: translateY(0); }
}
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