fix: differentiate landing page title from tagline

Author: codesoda

docs/src/content/docs/index.mdx

@@ -1,9 +1,9 @@
 ---
 title: Write tests in plain English. An AI agent runs them.
-description: Write tests in plain English. An AI agent runs them.
+description: A CLI test harness that drives AI agents through plain-English test plans. Structured pass/fail results, built-in infrastructure, full audit trail.
 template: splash
 hero:
-  tagline: Write test steps in plain English. An AI agent executes them. You get structured pass/fail results.
+  tagline: Describe what to test in a TOML file. Bugatti handles setup, drives an AI agent through each step, and gives you structured OK/WARN/ERROR results with a full audit trail.
   actions:
     - text: Get Started
       link: /getting-started/