diff --git a/door.css b/door.css
new file mode 100644
index 0000000..746168d
--- /dev/null
+++ b/door.css
@@ -0,0 +1,54 @@
+body{
+    background: #ffffe0; color: #000000;
+}
+
+h1{
+    text-align: center;
+    color:#000000;
+    padding: 0px;
+    width: 400pt;
+    border: solid 1px;
+    margin-right: auto;
+    margin-left: auto;
+}
+
+div.memo{ 
+    background-color: #c8e7fa;
+    width: 800px;
+    margin: auto;
+    padding: 1em;
+}
+
+div.question{
+    border: dashed 1px;
+    border-color: #00008b;
+    background-color: #ffffff;
+    width: 800px;
+    margin: auto;
+    text-align: center;
+}
+
+.center{
+    text-align: center;
+    margin: 10px;
+}
+
+.success {
+    color: #ff8c00;
+    font-size: 300%;
+    text-indent: 0em;
+    text-align: center;
+    text-shadow: #ffe4b5 0 -2px, #ffe4b5 0 2px, #ffe4b5 2px 0, #ffe4b5 -2px 0;
+    font-weight: bold;
+    margin: 2em 0em;
+}
+
+p.thank{
+    font-size: 150%;
+    text-align: center;
+}
+
+.replay{
+    text-align: center;
+    margin: 10px;
+}
\ No newline at end of file