ZeroToDev — In-Post Website Demo & Playground

Purpose: This demo is for learning and experimenting only. It shows a small multi-page website (Home, About, Services, Contact) running inside a single Blogger post (SPA). Do not use this as-is for real deployment — it’s intentionally simplified for teaching.

How to use: edit HTML / CSS / JS panels below, click Run, then preview or download the bundle. Use Load buttons to quickly open the Home/About/Services/Contact templates.

HTML (single-file SPA template)

<!doctype html>
<html>
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width,initial-scale=1" />
  <title>ZeroToDev — Demo</title>
</head>
<body>
  <!-- SPA container -->
  <div id="app">
    <!-- Nav (will be styled by CSS) -->
    <header class="site-header">
      <nav class="nav">
        <a href="#home" class="brand">ZeroToDev</a>
        <ul class="menu">
          <li><a href="#home" data-page="home">Home</a></li>
          <li><a href="#about" data-page="about">About</a></li>
          <li><a href="#services" data-page="services">Services</a></li>
          <li><a href="#contact" data-page="contact">Contact</a></li>
        </ul>
      </nav>
    </header>

    <!-- Pages (content for each page) -->
    <main id="page-root">
      <section id="home" class="page page-active">
        <div class="container">
          <h1>Build real projects — Zero to Dev</h1>
          <p>Learn by doing. Hands-on tutorials and demo projects.</p>
          <a class="cta" href="#services" data-page="services">See Services</a>

          <div class="cards">
            <article class="card">
              <h3>Mini Projects</h3>
              <p>Create small projects to level up.</p>
            </article>
            <article class="card">
              <h3>Tutorials</h3>
              <p>Step-by-step coding lessons.</p>
            </article>
            <article class="card">
              <h3>Resources</h3>
              <p>Cheatsheets, templates and starter packs.</p>
            </article>
          </div>
        </div>
      </section>

      <section id="about" class="page" style="display:none">
        <div class="container">
          <h1>About ZeroToDev</h1>
          <p>ZeroToDev is a learning demo showing how pages can be built and switched inside a single container. It’s for practice only.</p>
          <a class="cta" href="#home" data-page="home">Back Home</a>
        </div>
      </section>

      <section id="services" class="page" style="display:none">
        <div class="container">
          <h1>Services</h1>
          <ul>
            <li>Project Tutorials</li>
            <li>Starter Templates</li>
            <li>Code Reviews</li>
          </ul>
          <a class="cta" href="#contact" data-page="contact">Get in touch</a>
        </div>
      </section>

      <section id="contact" class="page" style="display:none">
        <div class="container">
          <h1>Contact</h1>
          <p>Email: <a href="mailto:support@example.com">support@example.com</a></p>
          <form id="contactForm">
            <label>Name<br><input name="name" required></label><br/><br/>
            <label>Email<br><input name="email" type="email" required></label><br/><br/>
            <label>Message<br><textarea name="message" required>

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