Make the layout adjust to narrow viewports better

Below about 600px (phones and small windowed browsers) the sidebar
starts breaking the layout. Moving it inline helps a lot; with
modern CSS (flex layout) we can also shuffle it after the main content.
Older browsers that don't do one of the 4 variants of flex layout
will just display it above the main content, which is annoying
but not too bad.

blueview also has a minimum width set so that it won't become
ridiculously small with small fonts, but that means it gets
scrollbars below about 850px; stop enforcing the minimum width
if necessary.

Finally, blueview's relatively generous margins look good in a
desktop browser, but are just too space-hungry on a phone.
Turn them off below 600px.

1 files changed, 31 insertions, 0 deletions

diff --git a/doc/style.css b/doc/style.css
index 4c48e5c7b..18bf531a6 100644
--- a/doc/style.css
+++ b/doc/style.css
@@ -548,3 +548,34 @@ a.openid_large_btn:focus {
 .trailsep {
 	display: none;
 }
+
+/* mobile/small-screen-friendly layout */
+@media (max-width: 600px) {
+	.sidebar {
+		width: auto;
+		float: none;
+		margin-top: 0;
+	}
+
+	/* if the mobile browser is new enough, use flex layout to shuffle
+	 * the sidebar to the end */
+	.page {
+		display: -webkit-box;
+		display: -ms-flexbox;
+		display: -webkit-flex;
+		display: flex;
+		flex-direction: column;
+	}
+	#pageheader {
+		-webkit-box-ordinal-group: -1;
+		-ms-flex-order: -1;
+		-webkit-order: -1;
+		order: -1;
+	}
+	.sidebar, #footer {
+		-webkit-box-ordinal-group: 1;
+		-ms-flex-order: 1;
+		-webkit-order: 1;
+		order: 1;
+	}
+}