Add more explanation copy to Rainbow Pool pages

app/assets/stylesheets/pet_types/show.sass

@@ -2,6 +2,7 @@
 
 .rainbow-pool-list
 	--preview-base-width: 200px
+	margin-bottom: 2em
 
 	.glitched
 		cursor: help

app/views/pet_types/index.html.haml

@@ -1,6 +1,15 @@
 - title "Rainbow Pool"
 - use_responsive_design
 
+:markdown
+	Welcome, welcome! These are all the colors and species of pet we've seen
+	before. You can also check out our [NC Pet Styles][1] listings, too!
+
+	If you've seen a new kind of pet, you can enter its name on the homepage to
+	show us! Thank you so much 💖
+
+	[1]: #{alt_styles_path}
+
 = form_with method: :get, class: "rainbow-pool-filters" do |form|
 	%fieldset
 		%legend Filter by:

app/views/pet_types/show.html.haml

@@ -13,12 +13,35 @@
 	%li
 		Appearances
 
+%p
+	These are the various appearances we've seen for this pet! We've hand-labeled
+	them by their emotion and their gender expression, as best we can.
+
+%p
+	If you've seen another kind of #{@pet_type.human_name}, you can enter its
+	name on the homepage to show us! Thank you 💖
+
+- if @pet_states[:canonical].any?(&:glitched?)
+	%p
+		Some of these appearances are marked as "glitched", but it's still the
+		best sample we have. If someone models an unglitched alternative for us,
+		we'll use that instead!
+
 %ul.rainbow-pool-list
 	= render @pet_states[:canonical]
 
 - if @pet_states[:other].present?
-	%details
-		%summary Other
+	%h3 Other appearances
+
+	%p
+		These are some other appearances we've seen over time!
+		- if @pet_states[:other].any?(&:labeled?)
+			The labeled appearances here don't appear in the outfit editor by
+			default anymore, because they've been replaced by better alternatives.
+		- unless @pet_states[:other].all?(&:labeled?)
+			The unlabeled appearances here <em>might</em> be what we show in the
+			outfit editor later, once we have the chance to label them.
+
 %ul.rainbow-pool-list
 	= render @pet_states[:other]