Fixed invalid HTML in workshop previews

app/assets/stylesheets/_application.scss

@@ -1748,19 +1748,30 @@ html[data-lingua-franca-example="html"] {
 		overflow: hidden;
 	}
 
+	.workshop-link {
+		position: static;
+
+		@include before {
+			content: '';
+			display: block;
+			position: absolute;
+			top: 0;
+			right: 0;
+			bottom: 0;
+			left: 0
+		}
+		@include after {
+			display: none;
+		}
+	}
+
 	> li {
+		position: relative;
 		margin-bottom: 1em;
 		border: 0.2em solid;
 		@include _(border-radius, 0.25em);
-
-		> a {
-			display: block;
-			color: inherit;
-
-			@include after {
-				display: none;
-			}
-		}
+		@include _(transition, box-shadow 250ms ease-in-out);
+		will-change: box-shadow;
 
 		ul {
 			padding-left: 2.5em;

app/views/workshops/_workshop_previews.html.haml

@@ -2,11 +2,11 @@
 	- workshops.sort_by{ |w| w.title.downcase }.each do |w|
 		- is_interested = w.interested?(current_user)
 		%li{class: [is_interested ? :interested : nil]}
-			= link_to view_workshop_path(w.conference.slug, w.id) do
+			= link_to view_workshop_path(w.conference.slug, w.id), class: 'workshop-link' do
 				%h4.title=w.title
-				.workshop-interest
-					- if is_interested
-						=_'articles.workshops.info.you_are_interested_count', "You and #{w.interested_count - 1} others are interested in this workshop", :vars => {:count => (w.interested_count - 1)}
-					- elsif w.interested_count > 0
-						=_'articles.workshops.info.interested_count', "#{w.interested_count} people are interested in this workshop", :vars => {:count => w.interested_count}
-				.workshop-description=w.info.html_safe
+			.workshop-interest
+				- if is_interested
+					=_'articles.workshops.info.you_are_interested_count', "You and #{w.interested_count - 1} others are interested in this workshop", :vars => {:count => (w.interested_count - 1)}
+				- elsif w.interested_count > 0
+					=_'articles.workshops.info.interested_count', "#{w.interested_count} people are interested in this workshop", :vars => {:count => w.interested_count}
+			.workshop-description=w.info.html_safe