Enhance styles for body and octocat image

Modified CSS tags and selectors

Author: LG-GitHub-Red

styles.css

@@ -14,4 +14,18 @@ p {
   width: 400px;
   margin: 50px auto;
   font: 30px Monaco,"Courier New","DejaVu Sans Mono","Bitstream Vera Sans Mono",monospace;
+  color: #333;
+  line-height: 1.5;
+  text-align: center;
+}
+
+body {
+  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+  background-color: #f8f9fa;
+}
+
+#octocat img {
+  display: block;
+  width: 100%;
+  height: auto;
 }