Implemented theme switcher (light/dark)

styles/blog.css

@@ -1,3 +1,3 @@
-.main img {
+#mesh {
   display: none;
 }

styles/style.css

@@ -65,6 +65,7 @@ footer {
   font-size: 1.3rem;
   line-height: 2rem;
   max-width: 120ch;
+  overflow-y: auto;
 }
 
 a,
@@ -95,7 +96,7 @@ a:focus {
   font-size: 2rem
 }
 
-.main img {
+#mesh {
   position: absolute;
   bottom: 5rem;
   right: 0;
@@ -115,4 +116,13 @@ a:focus {
   display: flex;
   flex-direction: row;
   align-items: center;
+}
+
+button {
+  font-style: italic;
+  font-weight: lighter;
+  border: none;
+  background: var(--bg);
+  color: var(--text);
+  margin: 0 4rem 0 0;
 }