diff --git a/public/hint.css b/public/hint.css
new file mode 100644
index 0000000..6b1bc50
--- /dev/null
+++ b/public/hint.css
@@ -0,0 +1,51 @@
+#searchMirror {
+  position: absolute;
+  height: 0px;
+  margin-top: 1px;
+}
+
+#searchMirror > span {
+  opacity: 0;
+  white-space:nowrap;
+  overflow: hidden;
+}
+
+#searchMirror > ul {
+  color: white;
+  margin: 0;
+  text-indent: 0;
+  display: inline-block;
+  background-color: #496000;
+  opacity: 0;
+  padding: 0;
+  padding-top: 5px;
+  padding-bottom: 10px;
+  border-bottom-left-radius: 10px;
+  border-bottom-right-radius: 10px;
+}
+
+#searchMirror > ul > li {
+  list-style-type: none;
+  list-style-position: outside;
+  padding: 3pt 10pt;
+  text-shadow: none;
+}
+
+#searchMirror > ul > li > span {
+  float: right;
+  margin-left: 30pt;
+  text-align: right;
+  font-style: italic;
+  color: #7ba400;
+}
+
+/* like sidebar ul li.active */
+#searchMirror > ul > li.active {
+  background-color: #7ba400;
+  text-shadow: 1px 1px rgba(0, 0, 0, 0.4);
+}
+
+#searchMirror > ul > li.active > span {
+  color: #496000;
+  text-shadow: none;
+}
\ No newline at end of file