add css for share bar

_sass/jekyll-theme-modernist.scss

@@ -327,3 +327,94 @@ footer {
     content:'at https://github.com/';
   }
 }
+
+#share-bar {
+  font-size: 20px;
+}
+
+/* Title */
+#share-bar h4 {
+  margin-bottom: 10px;
+  font-weight: 500;
+}
+
+/* All buttons */
+.share-buttons {
+}
+
+/* Each button */
+.share-button {
+  margin: 0px;
+  margin-bottom: 10px;
+  margin-right: 3px;
+  border: 1px solid #D3D6D2;
+  padding: 5px 10px 5px 10px;
+}
+.share-button:hover {
+  opacity: 1;
+  color: #ffffff;
+}
+
+/* Facebook button */
+.fa-facebook-official {
+  color: #3b5998;
+}
+.fa-facebook-official:hover {
+  background-color: #3b5998;
+}
+
+/* Twitter button */
+.fa-twitter {
+  color: #55acee;
+}
+.fa-twitter:hover {
+  background-color: #55acee;
+}
+
+/* Google-PLus button */
+.fa-google-plus {
+  color: #dd4b39;
+}
+.fa-google-plus:hover {
+  background-color: #dd4b39;
+}
+
+/* Pinterest button */
+.fa-pinterest-p {
+  color: #cb2027;
+}
+.fa-pinterest-p:hover {
+  background-color: #cb2027;
+}
+
+/* Tumblr button */
+.fa-tumblr {
+  color: #32506d;
+}
+.fa-tumblr:hover {
+  background-color: #32506d;
+}
+
+/* Reddit button */
+.fa-reddit-alien {
+  color: #ff4500;
+}
+.fa-reddit-alien:hover {
+  background-color: #ff4500;
+}
+
+/* LinkedIn button */
+.fa-linkedin {
+  color: #007bb5;
+}
+.fa-linkedin:hover {
+  background-color: #007bb5;
+}
+
+/* Email button */
+.fa-envelope {
+  color: #444444;
+}
+.fa-envelope:hover {
+  background-color: #444444;
+}