feat: rewrite home page with motivation and personal story (#139)

Add "Why This Tutorial" section — concepts before commands, structured
path, practical playbook, AI workflow foundation. Add personal origin
story in About section. Remove Quick start (duplicated Introduction
links). Rename "Selected references" to "Further Reading". Fix heading
case to title case for consistency with chapters.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: braboj

astro-site/src/pages/index.astro

@@ -4,11 +4,11 @@ import DocLayout from "../layouts/DocLayout.astro";
 const base = import.meta.env.BASE_URL;
 
 const headings = [
-  { depth: 2, slug: "what-youll-learn", text: "What you'll learn" },
+  { depth: 2, slug: "why-this-tutorial", text: "Why This Tutorial" },
+  { depth: 2, slug: "what-youll-learn", text: "What You'll Learn" },
   { depth: 2, slug: "chapters", text: "Chapters" },
-  { depth: 2, slug: "quick-start", text: "Quick start" },
   { depth: 2, slug: "about", text: "About" },
-  { depth: 2, slug: "selected-references", text: "Selected references" },
+  { depth: 2, slug: "further-reading", text: "Further Reading" },
 ];
 
 const jsonLd = {
@@ -37,12 +37,45 @@ const jsonLd = {
 >
 
   <p>
-    A hands-on tutorial that takes you from first commit to confident daily use.
-    Learn Git's concepts first, then apply them through practical exercises
-    and real-world examples.
+    Git is everywhere — in every team, every deployment pipeline, and every
+    AI coding tool. Yet most developers learn it by memorizing commands
+    without understanding what happens underneath.
   </p>
 
-  <h2 id="what-youll-learn">What you'll learn</h2>
+  <p>
+    This tutorial takes a different approach. You learn the concepts first —
+    how Git stores data, how branches actually work, what a merge really
+    does — then apply that understanding through exercises and a 17-recipe
+    playbook you can reach for every day.
+  </p>
+
+  <h2 id="why-this-tutorial">Why This Tutorial</h2>
+
+  <ul>
+    <li>
+      <strong>Concepts before commands</strong> — understand the object model,
+      references, and the index so that every command makes sense instead of
+      feeling like magic.
+    </li>
+    <li>
+      <strong>Structured learning path</strong> — not a cheat sheet, not a
+      wall of text. Nine chapters that build on each other, with exercises
+      and quizzes to check your understanding.
+    </li>
+    <li>
+      <strong>Practical playbook</strong> — 17 recipe pages covering
+      everyday tasks, branching, remotes, debugging, and more. Look up
+      what you need, copy the commands, understand why they work.
+    </li>
+    <li>
+      <strong>Foundation for AI workflows</strong> — tools like Claude Code,
+      Cursor, and Copilot use Git under the hood. AI works best when you
+      know what you're asking for — understanding Git internals helps you
+      work with these tools effectively and catch mistakes.
+    </li>
+  </ul>
+
+  <h2 id="what-youll-learn">What You'll Learn</h2>
 
   <ul>
     <li>
@@ -116,24 +149,26 @@ const jsonLd = {
     </tbody>
   </table>
 
-  <h2 id="quick-start">Quick start</h2>
-
-  <p>New to Git? Start here:</p>
+  <h2 id="about">About</h2>
 
-  <ol>
-    <li><a href={`${base}introduction/#installation`}>Install Git</a> on your machine</li>
-    <li><a href={`${base}introduction/#how-git-works`}>Understand how Git works</a> — workspace, index, repository</li>
-    <li><a href={`${base}introduction/#exercises`}>Try the exercises</a> — clone, commit, push, pull</li>
-  </ol>
+  <p>
+    This tutorial started as personal memo pages — quick notes I wrote for
+    myself because I kept forgetting how Git works. Over time, those notes grew into Markdown documents, then chapters
+    with diagrams and exercises, then an Astro site with quizzes, a
+    17-recipe playbook, and the structured tutorial you see now.
+    More than 200 hours of writing, rewriting, and refining.
+  </p>
 
-  <h2 id="about">About</h2>
+  <p>
+    If it helps you understand Git a little better, it was worth every hour.
+  </p>
 
   <ul>
     <li>Created by <a href="https://github.com/braboj">Branimir Georgiev</a> and <a href="https://github.com/marwan-rashed">Marwan Rashed</a></li>
-    <li>Part of <a href="https://codewithbranko.com">Code with Branko</a> — practical tutorials for developers</li>
+    <li>Part of <a href="https://codewithbranko.com">Code with Branko</a> — practical tutorials for developers by heart</li>
   </ul>
 
-  <h2 id="selected-references">Selected references</h2>
+  <h2 id="further-reading">Further Reading</h2>
 
   <ul>
     <li><a href="https://git-scm.com/book/en/v2">Pro Git Book</a> — the definitive reference</li>