Added the hero headline

content/_index.md

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++++
+layout = "wide"
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+
+{{< hextra/hero-container cols="1">}}
+
+{{< hextra/hero-badge >}}
+  <div class="hx:w-2 hx:h-2 hx:rounded-full hx:bg-primary-400"></div>
+  <span>An open-source learning project</span>
+  {{< icon name="book-open" attributes="height=14" >}}
+{{< /hextra/hero-badge >}}
+
+<div class="hx:mt-6 hx:mb-6">
+{{< hextra/hero-headline >}}
+  Build computing from the ground up
+{{< /hextra/hero-headline >}}
+
+{{< hextra/hero-section heading="h3" >}}
+  *From bits and gates to OSes & beyond*
+{{< /hextra/hero-section >}}
+</div>
+
+<div class="hx:mb-12">
+{{< hextra/hero-subtitle >}}
+  An open-source learning suite that reveals how complexity arises from
+  simplicity.
+  <br>
+  A complete journey through the foundations of computer architecture for
+  students, educators, and the endlessly curious.
+{{< /hextra/hero-subtitle >}}
+</div>
+
+<div class="hx:mb-6">
+{{< hextra/hero-button text="Get Started" link="docs" >}}
+</div>
+
+{{< /hextra/hero-container >}}