update elements and fix some bugs

lib/src/prism/plugins/show-language/prism-show-language.css

Index: lib/src/prism/plugins/show-language/prism-show-language.css
diff --git a/lib/src/prism/plugins/show-language/prism-show-language.css b/lib/src/prism/plugins/show-language/prism-show-language.css
index 4a3c2f29f6650b403941e02ecb8991af66f4f0b5..9fddc2b2c495ad190c6ed8810eb362fc72a23fb2 100644
--- a/lib/src/prism/plugins/show-language/prism-show-language.css
+++ b/lib/src/prism/plugins/show-language/prism-show-language.css
@@ -1,16 +1,29 @@
-pre[class*='language-'] {
+div.prism-show-language {
 	position: relative;
 }
-pre[class*='language-'][data-language]::before {
-	content: attr(data-language);
+
+div.prism-show-language > div.prism-show-language-label[data-language] {
 	color: black;
 	background-color: #CFCFCF;
 	display: inline-block;
 	position: absolute;
+	bottom: auto;
+	left: auto;
 	top: 0;
 	right: 0;
+	width: auto;
+	height: auto;
 	font-size: 0.9em;
 	border-radius: 0 0 0 5px;
 	padding: 0 0.5em;
 	text-shadow: none;
-}
+	z-index: 1;
+	-webkit-box-shadow: none;
+	-moz-box-shadow: none;
+	box-shadow: none;
+	-webkit-transform: none;
+	-moz-transform: none;
+	-ms-transform: none;
+	-o-transform: none;
+	transform: none;
+}