style: reduce font sizes for better readability

- Body text: 1.05rem to 0.95rem
- H1: 2.5rem to 2rem
- H2: 2rem to 1.6rem
- H3: 1.5rem to 1.3rem
- H4: 1.25rem to 1.15rem
- Subtitle: 1.1rem to 1rem
- Mobile H1: 2rem to 1.75rem
- Mobile H2: 1.75rem to 1.4rem
- Mobile H3: 1.35rem to 1.2rem
- Line heights adjusted proportionally

Author: prabha-git

docs/stylesheets/extra.css

@@ -65,8 +65,8 @@ body {
 .md-typeset {
     font-family: "Courier Prime", monospace !important;
     font-weight: 400 !important;
-    font-size: 1.05rem !important;
-    line-height: 1.75 !important;
+    font-size: 0.95rem !important;
+    line-height: 1.7 !important;
     letter-spacing: 0.01em;
 }
 
@@ -76,7 +76,7 @@ code {
 
 /* Heading hierarchy */
 .md-typeset h1 {
-    font-size: 2.5rem !important;
+    font-size: 2rem !important;
     line-height: 1.3 !important;
     margin-top: 0 !important;
     margin-bottom: 1.5rem !important;
@@ -85,23 +85,23 @@ code {
 }
 
 .md-typeset h2 {
-    font-size: 2rem !important;
+    font-size: 1.6rem !important;
     line-height: 1.35 !important;
     margin-top: 3rem !important;
     margin-bottom: 1.25rem !important;
     font-weight: 700 !important;
 }
 
 .md-typeset h3 {
-    font-size: 1.5rem !important;
+    font-size: 1.3rem !important;
     line-height: 1.4 !important;
     margin-top: 2.5rem !important;
     margin-bottom: 1rem !important;
     font-weight: 700 !important;
 }
 
 .md-typeset h4 {
-    font-size: 1.25rem !important;
+    font-size: 1.15rem !important;
     line-height: 1.45 !important;
     margin-top: 2rem !important;
     margin-bottom: 0.75rem !important;
@@ -111,13 +111,13 @@ code {
 /* Paragraph spacing */
 .md-typeset p {
     margin-bottom: 1.25rem !important;
-    line-height: 1.75 !important;
+    line-height: 1.7 !important;
 }
 
 /* Subtitle spacing (first paragraph after h1) */
 .md-typeset h1 + p {
     margin-top: 0.5rem !important;
-    font-size: 1.1rem !important;
+    font-size: 1rem !important;
     color: var(--md-default-fg-color--light);
     margin-bottom: 2rem !important;
 }
@@ -511,15 +511,15 @@ button:focus-visible {
 
     /* Adjust typography for mobile */
     .md-typeset h1 {
-        font-size: 2rem !important;
+        font-size: 1.75rem !important;
     }
 
     .md-typeset h2 {
-        font-size: 1.75rem !important;
+        font-size: 1.4rem !important;
     }
 
     .md-typeset h3 {
-        font-size: 1.35rem !important;
+        font-size: 1.2rem !important;
     }
 
     /* Reduce spacing */