feat: Implement clearfix before headers

assets/styles/millironx.css

@@ -253,6 +253,22 @@ blockquote small {
     float: right;
     max-width: 50%;
   }
+
+  /*
+    Clearfix implementation
+  */
+  h1::before,
+  h2::before,
+  h3::before,
+  h4::before,
+  h5::before,
+  h6::before {
+    content: " "; /* Older browser do not support empty content */
+    visibility: hidden;
+    display: block;
+    height: 0;
+    clear: both;
+  }
 } /* end @media */
 
 @supports (animation-timeline: scroll()) {