fix: README links to mantle.dvflw.co, GitHub target="_blank", deprecated CSS

- README doc links now point to https://mantle.dvflw.co/docs/*
- GitHub external links get target="_blank" rel="noopener"
- word-break: break-word → overflow-wrap: anywhere (deprecated property)

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

Author: michaelmcnees

README.md

@@ -50,7 +50,7 @@ steps:
 - **Checkpoint and Resume** -- Steps checkpoint to Postgres after completion. Crash mid-workflow? Restart picks up from the last completed step.
 - **Secrets as Opaque Handles** -- Credentials are AES-256-GCM encrypted at rest and resolved at connector invocation time. Never exposed in expressions, logs, or step outputs.
 
-[How Mantle compares to Temporal, n8n, LangChain, Airflow, and others.](/docs/comparison)
+[How Mantle compares to Temporal, n8n, LangChain, Airflow, and others.](https://mantle.dvflw.co/docs/comparison)
 
 ## Quick Start
 
@@ -69,7 +69,7 @@ mantle apply examples/hello-world.yaml
 mantle run hello-world
 ```
 
-17 example workflows are included in [`examples/`](examples/). See the [Getting Started guide](/docs/getting-started) for a full walkthrough.
+17 example workflows are included in [`examples/`](examples/). See the [Getting Started guide](https://mantle.dvflw.co/docs/getting-started) for a full walkthrough.
 
 ## Connectors
 
@@ -85,7 +85,7 @@ mantle run hello-world
 | Postgres | `postgres/query` | Parameterized SQL against external databases |
 | S3 | `s3/put`, `s3/get`, `s3/list` | Put, get, list objects (S3-compatible) |
 
-Need something else? Write a [plugin](/docs/plugins). Any executable that reads JSON from stdin and writes JSON to stdout -- Python, Rust, Node, Bash.
+Need something else? Write a [plugin](https://mantle.dvflw.co/docs/plugins). Any executable that reads JSON from stdin and writes JSON to stdout -- Python, Rust, Node, Bash.
 
 ## CLI Reference
 
@@ -132,7 +132,7 @@ Need something else? Write a [plugin](/docs/plugins). Any executable that reads
 | `mantle cleanup` | Clean up old executions and artifacts |
 | `mantle version` | Print version info |
 
-See the [CLI Reference](/docs/cli-reference) for full usage and flags.
+See the [CLI Reference](https://mantle.dvflw.co/docs/cli-reference) for full usage and flags.
 
 ## Configuration
 
@@ -204,7 +204,7 @@ make clean      # Remove built binary
 
 ## Contributing
 
-Contributions are welcome. Please open an issue first to discuss what you want to change. See the [Contributing guide](/docs/contributing) for details.
+Contributions are welcome. Please open an issue first to discuss what you want to change. See the [Contributing guide](https://mantle.dvflw.co/docs/contributing) for details.
 
 ## License
 

site/src/components/Nav.astro

@@ -23,7 +23,7 @@ const isDocs = Astro.url.pathname.startsWith('/docs');
 
     <!-- Right side -->
     <div class="flex items-center gap-4">
-      <a href="https://github.com/dvflw/mantle" class="text-on-surface-variant hover:text-on-surface transition-colors" aria-label="GitHub">
+      <a href="https://github.com/dvflw/mantle" target="_blank" rel="noopener" class="text-on-surface-variant hover:text-on-surface transition-colors" aria-label="GitHub">
         <svg class="w-5 h-5" fill="currentColor" viewBox="0 0 24 24"><path d="M12 0C5.37 0 0 5.37 0 12c0 5.31 3.435 9.795 8.205 11.385.6.105.825-.255.825-.57 0-.285-.015-1.23-.015-2.235-3.015.555-3.795-.735-4.035-1.41-.135-.345-.72-1.41-1.23-1.695-.42-.225-1.02-.78-.015-.795.945-.015 1.62.87 1.845 1.23 1.08 1.815 2.805 1.305 3.495.99.105-.78.42-1.305.765-1.605-2.67-.3-5.46-1.335-5.46-5.925 0-1.305.465-2.385 1.23-3.225-.12-.3-.54-1.53.12-3.18 0 0 1.005-.315 3.3 1.23.96-.27 1.98-.405 3-.405s2.04.135 3 .405c2.295-1.56 3.3-1.23 3.3-1.23.66 1.65.24 2.88.12 3.18.765.84 1.23 1.905 1.23 3.225 0 4.605-2.805 5.625-5.475 5.925.435.375.81 1.095.81 2.22 0 1.605-.015 2.895-.015 3.3 0 .315.225.69.825.57A12.02 12.02 0 0024 12c0-6.63-5.37-12-12-12z"/></svg>
       </a>
       <a href={`${prefix}#get-started`} class="hidden sm:inline-flex px-4 py-2 bg-primary text-on-primary text-sm font-medium hover:bg-primary-dim transition-colors">
@@ -51,7 +51,7 @@ const isDocs = Astro.url.pathname.startsWith('/docs');
       <svg class="w-5 h-5" fill="none" stroke="currentColor" stroke-width="1.5" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" d="M12 6.042A8.967 8.967 0 006 3.75c-1.052 0-2.062.18-3 .512v14.25A8.987 8.987 0 016 18c2.305 0 4.408.867 6 2.292m0-14.25a8.966 8.966 0 016-2.292c1.052 0 2.062.18 3 .512v14.25A8.987 8.987 0 0018 18a8.967 8.967 0 00-6 2.292m0-14.25v14.25"/></svg>
       <span>Docs</span>
     </a>
-    <a href="https://github.com/dvflw/mantle" class="bottom-nav-item flex flex-col items-center gap-0.5 px-3 py-1 text-[11px] text-on-surface-variant hover:text-on-surface transition-colors" aria-label="GitHub">
+    <a href="https://github.com/dvflw/mantle" target="_blank" rel="noopener" class="bottom-nav-item flex flex-col items-center gap-0.5 px-3 py-1 text-[11px] text-on-surface-variant hover:text-on-surface transition-colors" aria-label="GitHub">
       <svg class="w-5 h-5" fill="currentColor" viewBox="0 0 24 24"><path d="M12 0C5.37 0 0 5.37 0 12c0 5.31 3.435 9.795 8.205 11.385.6.105.825-.255.825-.57 0-.285-.015-1.23-.015-2.235-3.015.555-3.795-.735-4.035-1.41-.135-.345-.72-1.41-1.23-1.695-.42-.225-1.02-.78-.015-.795.945-.015 1.62.87 1.845 1.23 1.08 1.815 2.805 1.305 3.495.99.105-.78.42-1.305.765-1.605-2.67-.3-5.46-1.335-5.46-5.925 0-1.305.465-2.385 1.23-3.225-.12-.3-.54-1.53.12-3.18 0 0 1.005-.315 3.3 1.23.96-.27 1.98-.405 3-.405s2.04.135 3 .405c2.295-1.56 3.3-1.23 3.3-1.23.66 1.65.24 2.88.12 3.18.765.84 1.23 1.905 1.23 3.225 0 4.605-2.805 5.625-5.475 5.925.435.375.81 1.095.81 2.22 0 1.605-.015 2.895-.015 3.3 0 .315.225.69.825.57A12.02 12.02 0 0024 12c0-6.63-5.37-12-12-12z"/></svg>
       <span>GitHub</span>
     </a>