diff --git a/assets/script/theme.js b/assets/script/theme.js
index f66097a..ea53881 100644
--- a/assets/script/theme.js
+++ b/assets/script/theme.js
@@ -20,6 +20,7 @@ window.addEventListener("load", function() {
             var img = document.createElement("img");
             img.className = "tree";
             img.height = 300;
+            img.alt = "";
             img.style.position = "fixed";
             img.style.left = left + "px";
             img.style.bottom = bottom + "px";
diff --git a/assets/style/light-mode.css b/assets/style/light-mode.css
index 3b4ee1f..2e0dd83 100644
--- a/assets/style/light-mode.css
+++ b/assets/style/light-mode.css
@@ -53,7 +53,7 @@ body {
     color: white;
 }
 
-.inline-code, .inline-code-text {
+.inline-code, .inline-code-text, .inline-code-icon {
     background-color: #EEE;
 }
 object[type='image/svg+xml'] {
diff --git a/assets/style/main.css b/assets/style/main.css
index 706fdd4..d1d6f19 100644
--- a/assets/style/main.css
+++ b/assets/style/main.css
@@ -198,8 +198,8 @@ h1, h2 {
 .icon {
     -ms-interpolation-mode: nearest-neighbor;
     display: inline-block;
-    width: 16px;
-    height: 16px;
+    width: 1em;
+    height: 1em;
     background-size: 16px;
     position: relative;
     top: 3px;