upd

assets/sass/_content.scss

@@ -4,6 +4,7 @@ body {
     min-height: 100%;
     padding-bottom: 20px;
     font-family: $sansfont;
+    font-weight: normal;
 
     background-color: $background-color;
     color: $text-color;
@@ -19,7 +20,7 @@ header {
         margin-bottom: 12px;
 
         #title {
-            font-size: 2em;
+            font-size: 2.5em;
             color: $text-color;
 
             &:hover {
@@ -29,6 +30,12 @@ header {
     }
 }
 
+footer {
+    margin-top: 24px;
+    margin-bottom: 40px;
+    text-align: center;
+}
+
 small {
     color: $small-text-color;
 }

layouts/_default/baseof.html

@@ -30,7 +30,7 @@
             {{ block "content" . }}{{ end }}
         </div>
 
-        <div style="text-align: center; font-weight: 200; margin-bottom: 40px;">
+        <footer>
             <p style="margin: 0;">
                 blog code licensed under <a href="https://www.gnu.org/licenses/gpl-3.0.txt" target="_blank">gpl3</a>.
                 post contents licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/legalcode.txt">cc by-sa 4.0</a>.
@@ -38,6 +38,6 @@
                 written by michael zhang.
                 <a href="https://git.mzhang.io/michael/blog" class="colorlink" target="_blank">source</a>
             </p>
-        </div>
+        </footer>
     </body>
 </html>