--- a/css/main.css	Thu Jan 31 19:00:48 2019 +0900
+++ b/css/main.css	Fri Feb 01 10:28:05 2019 +0900
@@ -21,54 +21,43 @@
   }*/
 
 nav{
-	position: relative;
-	border-bottom: 5px solid #aaa;
-	width: 100%;
-	top: 0;
-	z-index: 100;
+  border-top: 2px solid orange;
+  border-bottom: 2px solid orange;
 }
-
 nav ul{
-	position: absolute;
-	left:10%;
-	display: table;
-	margin: 0 auto;
-	padding: 0;
-	width: 80%;
-	text-align: center;
+  display: table;
+  margin: 0 auto;
+  padding: 0;
+  width: 80%;
+  text-align: center;
 }
-
 nav ul li{
-	display: table-cell;
-	width: 50px;
+  display: table-cell;
+  min-width: 50px;
+  border-right: 2px solid orange;
 }
-
+nav ul li:first-child{
+  border-left: 2px solid orange;
+}
 nav ul li a{
-	display: block;
-	width: 100%;
-	height: 100%;
-	padding: 10px 0;
-	text-decoration: none;
-	color: #111;
-}
-
-nav ul li.current{
-	font-weight: bold;
-	border-top: 5px solid #00B0F0;
+  display: block;
+  width: 100%;
+  padding: 10px 0;
+  text-decoration: none;
+  color: #000;
+  font-size: large;
 }
-
-nav ul li.current a{
-	color: #00B0F0;
+nav ul li a:hover{
+  background-color:#F8E750;
+  border-bottom: 0 solid #F8E750;
 }
-
-nav ul li a:hover{
-	color: #0089BB;
-	background-color: #FBFBDD;
+nav ul li.current{
+  font-weight: bold;
 }
-
-nav ul li:hover{
-	border-top: 5px solid #F8E750;
-} 
+nav ul li.current a{
+  border-bottom: 5px solid #00B0F0;
+  color: #00B0F0;
+}
 
 .contents{
 	margin: 60px 10px 60px 10px;