added cactus theme files

hugo-content/themes/cactus/assets/scss/partial/footer.scss

@@ -0,0 +1,66 @@
+#footer {
+  position: absolute;
+  bottom: 0;
+  margin-bottom: 10px;
+  width: 100%;
+  color: $color-meta;
+  vertical-align: top;
+  text-align: center;
+  font-size: 11px;
+
+  ul {
+    margin: 0;
+    padding: 0;
+    list-style: none;
+  }
+  li {
+    display: inline-block;
+    margin-right: 15px;
+    border-right: 1px solid;
+    border-color: $color-border;
+    vertical-align: middle;
+
+    a {
+      margin-right: 15px;
+    }
+  }
+  li:last-child {
+    margin-right: 0;
+    border-right: 0;
+
+    a {
+      margin-right: 0;
+    }
+  }
+  a {
+    color: $color-meta;
+    text-decoration: underline;
+    background-image: none;
+  }
+  a:hover {
+    color: lighten($color-meta, 20%);
+  }
+  .footer-left {
+    height: 20px;
+    vertical-align: middle;
+    line-height: 20px;
+  }
+}
+@media (min-width: 39rem) {
+  #footer {
+    display: flex;
+    flex-flow: row wrap;
+    justify-content: space-between;
+    align-items: center;
+    align-content: center;
+    margin-bottom: 20px;
+
+    .footer-left {
+      align-self: flex-start;
+      margin-right: 20px;
+    }
+    .footer-right {
+      align-self: flex-end;
+    }
+  }
+};