restructure: main.css is the manifest, 01-asw.css is the framework

- asw.css → main.css (just imports, no theming :root)
- 01-tokens.css → 01-asw.css (this IS the ASW design system)
- Removed empty :root {} theming block
- Updated deploy.sh PostCSS path

deploy.sh

@@ -4,6 +4,6 @@ set -euo pipefail
 cd ~/projects/asw
 git pull origin main --ff-only
 npm ci --prefer-offline 2>/dev/null
-npx postcss assets/css/asw.css -o assets/css/asw-built.css
+npx postcss assets/css/main.css -o assets/css/asw-built.css
 hugo
 echo "[$(date -u +%Y-%m-%dT%H:%M:%SZ)] Deploy complete" >> /tmp/asw-deploy.log