fix: tune blog article typography

Author: Yusaku01

src/pages/blog/[...slug].astro

@@ -158,6 +158,11 @@ const locale = 'ja';
     word-break: break-word;
   }
 
+  .blog-article-content :where(p, li) {
+    font-size: var(--fs-body);
+    line-height: 1.9;
+  }
+
   .blog-article-content :where(:not(pre) > code) {
     overflow-wrap: anywhere;
     white-space: normal;
@@ -616,7 +621,7 @@ const locale = 'ja';
   }
 
   .toc-sidebar-title {
-    font-size: 1rem;
+    font-size: 1.125rem;
     font-weight: 700;
     color: #111827;
     margin-bottom: 0.75rem;
@@ -705,7 +710,7 @@ const locale = 'ja';
     display: inline-flex;
     align-items: center;
     gap: 0.375rem;
-    font-size: 0.8125rem;
+    font-size: 1rem;
     font-weight: 600;
     color: #374151;
     background: none;

src/pages/en/blog/[...slug].astro

@@ -173,6 +173,11 @@ const estimatedReadingTimeMinutes = getEstimatedReadingTimeMinutes(post.body ??
     word-break: break-word;
   }
 
+  .blog-article-content :where(p, li) {
+    font-size: var(--fs-body);
+    line-height: 1.9;
+  }
+
   .blog-article-content :where(:not(pre) > code) {
     overflow-wrap: anywhere;
     white-space: normal;
@@ -631,7 +636,7 @@ const estimatedReadingTimeMinutes = getEstimatedReadingTimeMinutes(post.body ??
   }
 
   .toc-sidebar-title {
-    font-size: 1rem;
+    font-size: 1.125rem;
     font-weight: 700;
     color: #111827;
     margin-bottom: 0.75rem;
@@ -720,7 +725,7 @@ const estimatedReadingTimeMinutes = getEstimatedReadingTimeMinutes(post.body ??
     display: inline-flex;
     align-items: center;
     gap: 0.375rem;
-    font-size: 0.8125rem;
+    font-size: 1rem;
     font-weight: 600;
     color: #374151;
     background: none;