diff --git a/blog/content/edition-3/posts/01-minimal-kernel/index.md b/blog/content/edition-3/posts/01-minimal-kernel/index.md
index eda58131..16978208 100644
--- a/blog/content/edition-3/posts/01-minimal-kernel/index.md
+++ b/blog/content/edition-3/posts/01-minimal-kernel/index.md
@@ -468,7 +468,7 @@ The start address specifies the memory address of our `_start` function.
 Here the function name `_start` becomes important.
 If we rename the function to something else (e.g., `_start_here`) and recompile, we see that no start address is set in the ELF file anymore:
 
-```hl_lines=5
+```bash,hl_lines=5
 ❯ rust-objdump -f target/x86_64-unknown-none/debug/kernel
 
 target/x86_64-unknown-none/debug/kernel:	file format elf64-x86-64
diff --git a/blog/sass/css/edition-3/main.scss b/blog/sass/css/edition-3/main.scss
index d765e03e..2eb09451 100644
--- a/blog/sass/css/edition-3/main.scss
+++ b/blog/sass/css/edition-3/main.scss
@@ -263,6 +263,20 @@ pre {
     overflow: auto;
     word-wrap: normal;
     background-color: var(--code-background-color);
+    &.language-rust, &.language-toml {
+        padding-left: 15px;
+        mark {
+            border-left: 3px solid rgba(0, 200, 0, 1);
+            margin-left: -10px;
+            padding-left: 7px;
+            font-weight: bold;
+        }
+    }
+    &.language-bash mark {
+        font-weight: bold;
+        text-decoration: underline;
+        text-decoration-color: rgba(255, 255, 155, 1);
+    }
 }
 pre code {
     padding: 0;
@@ -275,8 +289,8 @@ pre mark {
     display: block;
     // use the code color (instead of black)
     color: inherit;
-    // override the background color (instead of black)
-    background-color: rgba(0, 255, 0, 0.1) !important;
+    // override the hardcoded background color (set to black by the theme)
+    background-color: transparent !important;
 }
 
 .highlight {