diff --git a/themes/mytheme/assets/css/common/post-single.css b/themes/mytheme/assets/css/common/post-single.css
index 213106a..553e87d 100644
--- a/themes/mytheme/assets/css/common/post-single.css
+++ b/themes/mytheme/assets/css/common/post-single.css
@@ -38,6 +38,7 @@
     font-weight: 400;
     font-family: inherit;
     color: var(--content);
+    letter-spacing: 0.1px;
 }
 
 .post-content h3,
diff --git a/themes/mytheme/assets/css/core/reset.css b/themes/mytheme/assets/css/core/reset.css
index b1131ae..2fb4dca 100644
--- a/themes/mytheme/assets/css/core/reset.css
+++ b/themes/mytheme/assets/css/core/reset.css
@@ -31,7 +31,7 @@ h3 { font-size: 16px; }
 
 body {
     font-family: "Source Sans 3", "Pretendard", sans-serif !important;
-    font-size: 16px;
+    font-size: 14px;
     line-height: 1.8;
     word-break: break-word;
     background: var(--theme);
diff --git a/themes/mytheme/layouts/partials/header.html b/themes/mytheme/layouts/partials/header.html
index b78482b..843d122 100644
--- a/themes/mytheme/layouts/partials/header.html
+++ b/themes/mytheme/layouts/partials/header.html
@@ -14,7 +14,7 @@
             </a>
             <div class="logo-switches">
                 {{- if (not site.Params.disableThemeToggle) }}
-                <button id="theme-toggle" accesskey="t">
+                <button id="theme-toggle" accesskey="t"  aria-label="Toggle Darkmode">
                     <svg id="moon" xmlns="http://www.w3.org/2000/svg" width="24" height="18" viewBox="0 0 24 24"
                         fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"
                         stroke-linejoin="round">