[css-position-3] Move section, adjust headings

Author: fantasai

css-position-3/Overview.bs

@@ -184,8 +184,8 @@ Value Definitions</h3>
 <!-- End section: Values -->
 <!-- End section Introduction -->
 
-<h3 id="position-property">
-Choosing A Positioning Scheme: 'position' property</h3>
+<h2 id="position-property">
+Choosing A Positioning Scheme: 'position' property</h2>
 
 	<pre class="propdef">
 	Name: position
@@ -202,7 +202,7 @@ Choosing A Positioning Scheme: 'position' property</h3>
 	The 'position' property determines which of the positioning schemes
 	is used to calculate the position of a box.
 	Values other than ''static'' make the box a <dfn export lt="positioned box|positioned">positioned box</dfn>,
-	and cause the box to establish an [=absolute positioning containing block=] for its descendants.
+	and cause it to establish an [=absolute positioning containing block=] for its descendants.
 	Values have the following meanings:
 
 <dl dfn-for="position" dfn-type="value">
@@ -375,33 +375,6 @@ Containing Blocks of Positioned Boxes</h3>
 	(i.e., that generated by "div1").
 </div>
 
-<h3 id="breaking">
-Fragmenting Absolutely-positioned Elements</h3>
-
-	In paged media, an absolutely positioned element is positioned relative to its
-	containing block ignoring any page breaks (as if the document were continuous). The
-	element may subsequently be broken over several pages.
-
-	For absolutely positioned content that resolves to a position on a page other than the
-	page being laid out (the current page), or resolves to a position on the current page
-	which has already been rendered for printing, printers may place the content:
-
-	<ul>
-		<li>on the current page,</li>
-		<li>on a subsequent page, or</li>
-		<li>may omit it altogether.</li>
-	</ul>
-
-<p class="note">
-	Note, a block-level element that is split over several pages may have a different width
-	on each page and that there may be device-specific limits.
-</p>
-
-	User agents must not paginate the content of fixed boxes.
-
-	Note: User agents might print invisible content in other ways.
-	See [[CSS-PAGE-3#content-outside-box]].
-
 <!-- End section: Containing blocks -->
 
 <h3 id="rel-pos">
@@ -637,6 +610,33 @@ Absolute positioning</h3>
 	Though absolutely positioned boxes may have margins,
 	those margins do not <a href="https://www.w3.org/TR/CSS2/box.html#collapsing-margins">collapse</a> with any other margins.
 
+<h2 id="breaking">
+Fragmenting Absolutely-positioned Elements</h2>
+
+	In paged media, an absolutely positioned element is positioned relative to its
+	containing block ignoring any page breaks (as if the document were continuous). The
+	element may subsequently be broken over several pages.
+
+	For absolutely positioned content that resolves to a position on a page other than the
+	page being laid out (the current page), or resolves to a position on the current page
+	which has already been rendered for printing, printers may place the content:
+
+	<ul>
+		<li>on the current page,</li>
+		<li>on a subsequent page, or</li>
+		<li>may omit it altogether.</li>
+	</ul>
+
+<p class="note">
+	Note, a block-level element that is split over several pages may have a different width
+	on each page and that there may be device-specific limits.
+</p>
+
+	User agents must not paginate the content of fixed boxes.
+
+	Note: User agents might print invisible content in other ways.
+	See [[CSS-PAGE-3#content-outside-box]].
+
 <!-- End section: Absolute positioning -->
 
 <h3 id="fixed-pos">
@@ -747,8 +747,8 @@ Fixed positioning</h3>
 
 <!-- End section: Choosing a positioning scheme: 'position' property -->
 
-<h3 id="box-offsets-trbl">
-Box offsets: 'top', 'right', 'bottom', 'left'</h3>
+<h2 id="box-offsets-trbl">
+Box offsets: 'top', 'right', 'bottom', 'left'</h2>
 
 	An element is said to be <a>positioned</a>
 	if its 'position' property has a value other than ''static''.