diff --git a/kadai1.css b/kadai1.css
new file mode 100644
index 0000000..86d78b7
--- /dev/null
+++ b/kadai1.css
@@ -0,0 +1,77 @@
+.cen {
+    text-align: center;
+    padding-top: 3em;
+}
+
+.red {
+    color: red;
+    font-size: 30px;
+    font-weight: bold;
+    margin: 0;
+}
+
+.big {
+    font-size: 60px;
+    margin: 0;
+    font-weight: bold;
+}
+
+.flex {
+    display: flex;
+    flex-wrap: wrap; 
+    justify-content: center;
+}
+
+.katudou {
+    line-height: 45%;
+    padding-left: 20px;
+    padding-right: 20px;
+}
+
+.ninzuu {
+    padding-left: 20px;
+    padding-right: 20px;
+    line-height: 45%;
+}
+
+.image {
+    display: flex;
+    flex-wrap: wrap;
+    justify-content: center;
+}
+
+.sea {
+    width: 200px;
+    padding: 3px;
+}
+
+.yuuhi {
+    width: 200px;
+    padding: 3px;
+}
+
+.QR {
+    width: 100px;
+}
+
+.qr {
+    padding-right: 20px;
+    padding-left: 20px;
+}
+
+.renraku {
+    text-align: center;
+    padding-top: 20px;
+    padding-bottom: 30px;
+    font-size: 21px;
+}
+
+body {
+    background-image: url(./hatarakukatati.png);
+    background-repeat: no-repeat;    
+    background-size: cover;
+}
+
+.renraku p {
+    margin: 0;
+}