move theme data into one theme directory

themes/hugo-sustain/static/css/custom.css

@@ -0,0 +1,65 @@
+/* COLOURS */
+html, body {
+  border-top: 3px solid #0D76EC;
+}
+div.footer {
+  border-bottom: 5px solid #0D76EC;
+}
+.container a {
+  color: #0D76EC;
+}
+.container a:hover {
+  color: #12437A;
+}
+div.container.links .label-success {
+  background-color: rgba(92, 139, 184, 0.6);
+}
+div.container h1 {
+  font-weight: bold;
+  color: #0D76EC;
+}
+
+/* Avoid scrollbar jumps in centering 
+ * see https://css-tricks.com/eliminate-jumps-in-horizontal-centering-by-forcing-a-scroll-bar/
+ */
+div#wrap { 
+  margin-left: calc(100vw - 100%);
+}
+
+div.avatar img {
+  max-height: 190px;
+}
+.panel {
+  box-shadow: none;
+  -webkit-box-shadow: none;
+}
+
+ul.nav li.active a {
+  font-weight: bold;
+}
+
+/* Site specific settings */
+section#about p {
+  font-size: 18px;
+  margin-bottom: 20px;
+}
+
+div.contact p {
+  line-height: 1.5em;
+  margin-bottom: 30px;
+}
+
+/* transparency of tags */
+
+
+/* Scale social icons with hovering */
+.social-links li a {
+  font-size: 26px;
+}
+.social-links li a i {
+  transform: scale(0.8);
+  transition: transform .3s;
+}
+.social-links li a:hover i {
+  transform: scale(1);
+}