diff --git a/assets/scss/partials/highlight/common.scss b/assets/scss/partials/highlight/common.scss
index c680fa4..e2fabbf 100644
--- a/assets/scss/partials/highlight/common.scss
+++ b/assets/scss/partials/highlight/common.scss
@@ -52,12 +52,18 @@
 
 /* LineNumbersTable */
 .chroma .lnt {
-    margin-right: 0.4em;
+    margin-right: 0;
+    user-select: none;
     padding: 0 0.4em 0 0.4em;
     color: #7f7f7f;
     display: block;
 }
 
+/* Optimise code block selection experience */
+span.line {
+    margin-left: 0.4em;
+}
+
 /* LineNumbers */
 .chroma .ln {
     margin-right: 0.4em;