Add stylesheets for pdf header/footer

_layouts/ebook/page.html

 {% extends "layout.html" %}
 
+{% block style %}
+    <link rel="stylesheet" href="{{ "ebook.css"|resolveAsset }}">
+    <link rel="stylesheet" href="{{ "pdf.css"|resolveAsset }}">
+    {{ super() }}
+{% endblock %}
+
 {% block body %}
 <div class="page">
     {% block page %}

_layouts/ebook/pdf_footer.html

-{% extends "layout.html" %}
+{% extends "./page.html" %}
 
 {% block body %}
 <div class="pdf-footer">

_layouts/ebook/pdf_header.html

-{% extends "layout.html" %}
+{% extends "./page.html" %}
 
 {% block body %}
 <div class="pdf-header">

_layouts/layout.html

@@ -10,7 +10,6 @@
         {% if book.author %}<meta name="author" content="{{ book.author }}">{% endif %}
         {% if book.isbn %}<meta name="identifier" content="{{ book.isbn }}" scheme="ISBN">{% endif %}
         {% block style %}
-            <link rel="stylesheet" href="{{ "style.css"|resolveAsset }}">
             {% for resource in plugins.resources.css %}
                 {% if resource.url %}
                 <link rel="stylesheet" href="{{ resource.url }}">

_layouts/website/page.html

@@ -19,6 +19,10 @@
     {% endif %}
 {% endblock %}
 
+{% block style %}
+    <link rel="stylesheet" href="{{ "style.css"|resolveAsset }}">
+    {{ super() }}
+{% endblock %}
 
 {% block javascript %}
     <script src="{{ "app.js"|resolveAsset }}"></script>