style: redesign Kits PDF cover per MIT Press guidance

- Remove background image (was too similar to main textbook)
- Use teal (#0d9488) solid color cover with white text
- Update author attribution: 'Marcelo Rovai, with Vijay Janapa Reddi'
- Add 'A Companion to Introduction to Machine Learning Systems' tagline
- Creates distinct visual identity while maintaining series connection

kits/config/_quarto-pdf.yml

@@ -83,38 +83,36 @@ format:
       \let\Needspace\needspace
 
     # Cover page configuration
+    # Clean typographic cover - distinct from main textbook
+    # No background image - uses teal color accents instead
     coverpage: true
     coverpage-title: "Machine Learning Systems"
-    coverpage-bg-image: "assets/images/covers/cover-image-transparent.png"
-    coverpage-author: ["Marcelo Rovai", "Vijay Janapa Reddi"]
+    coverpage-author: ["Marcelo Rovai", "with Vijay Janapa Reddi"]
     coverpage-footer: "Hands-On Labs for"
     coverpage-theme:
       page-text-align: "center"
-
-      bg-image-left: "0.225\\paperwidth"
-      bg-image-bottom: 7
-      bg-image-rotate: 0
-      bg-image-opacity: 1.0
+      page-color: "0d9488"
+      page-fontcolor: "FFFFFF"
 
       author-style: "plain"
       author-sep: "newline"
-      author-fontsize: 20
+      author-fontsize: 18
       author-align: "right"
-      author-bottom: "0.132\\paperwidth"
+      author-bottom: "0.15\\paperwidth"
       author-left: 7in
       author-width: 6in
 
       header-style: "none"
       date-style: "none"
 
-      title-fontsize: 50
+      title-fontsize: 48
       title-left: "0.075\\paperwidth"
-      title-bottom: "0.31\\paperwidth"
+      title-bottom: "0.30\\paperwidth"
       title-width: "0.9\\paperwidth"
 
-      footer-fontsize: 22
+      footer-fontsize: 24
       footer-left: "0.075\\paperwidth"
-      footer-bottom: "0.38\\paperwidth"
+      footer-bottom: "0.40\\paperwidth"
       footer-width: "0.9\\paperwidth"
       footer-align: "left"
 
@@ -123,9 +121,11 @@ format:
     titlepage-theme:
       elements: ["\\titleblock",
                  "Marcelo Rovai",
-                 "Vijay Janapa Reddi",
-                 "\\vspace{80mm}",
-                 "Hands-on embedded ML laboratories for the Machine Learning Systems textbook.",
+                 "with Vijay Janapa Reddi",
+                 "\\vspace{60mm}",
+                 "Hands-on embedded ML laboratories accompanying the Machine Learning Systems textbook.",
+                 "\\vspace{10mm}",
+                 "A Companion to Introduction to Machine Learning Systems",
                  "\\vfill",
                  "{{< meta date >}}",
                  "\\vfill"]