diff --git a/cal.css b/cal.css
index 2cdf928..38c59f5 100644
--- a/cal.css
+++ b/cal.css
@@ -23,27 +23,3 @@
 td.sun {color: red;}
 td.sat {color: blue;}
 td.holiday {color: red;}
-
-
-
-/*課題3*/
-th {text-align: center;
-    width: 50px;
-    font-family: "serif";
-    font-weight: hold;}
-th:first-child {background: red;}
-th:first-child + th {background-color: pink;}
-th:first-child + th + th {background-color: orange;}
-th:first-child + th + th + th {background-color: aqua;}
-th:first-child + th + th + th + th {background-color: maroon;}
-th:first-child + th + th + th + th + th {background-color: yellow;}
-th:first-child + th + th + th + th + th + th {background-color: blue;}
-
-td {text-align: right;
-    width: 50px;
-    font-family: Georgia, serif;
-    font-weight: lighter;}
-    
-td:first-child {color: red;}
-td:last-child {color: blue;}
-td.holiday {color: red;}