Upload style.css

style.css

@@ -17,12 +17,37 @@
 /* ========================
    テーマ別背景画像
 ======================== */
-.aquarium_day {
-  background-image: url("https://cdn.pixabay.com/photo/2016/11/29/02/02/aquarium-1867283_1280.jpg");
+.default {
+  background-image: url("https://i.ibb.co/XzP6K2Y/room-day.png");
+}
+
+.room_night {
+  background-image: url("https://i.ibb.co/d5m821p/room-night.png");
+}
+
+.beach_sunset {
+  background-image: url("https://i.ibb.co/Q9r56s4/beach-sunset.png");
+}
+
+.festival_night {
+  background-image: url("https://i.ibb.co/3zdJ6Bw/festival-night.png");
+}
+
+.shrine_day {
+  background-image: url("https://i.ibb.co/L51Jd3x/shrine-day.png");
+}
+
+.cafe_afternoon {
+  background-image: url("https://i.ibb.co/yQxG4vs/cafe-afternoon.png");
 }
 
 .aquarium_night {
-  background-image: url("https://cdn.pixabay.com/photo/2017/06/20/20/45/fish-2424369_1280.jpg");
+  background-image: url("https://i.ibb.co/dK5r5rc/aquarium-night.png");
+}
+
+/* 以下は元々あったクラス定義 */
+.aquarium_day {
+  background-image: url("https://cdn.pixabay.com/photo/2016/11/29/02/02/aquarium-1867283_1280.jpg");
 }
 
 .forest_day {