first commit

src/App.css

@@ -0,0 +1,70 @@
+.height_40 {
+    height: 40px;
+}
+
+.height_40_center {
+    height: 40px;
+    line-height: 40px;
+}
+
+.display_inline_block {
+    display: inline-block;
+}
+
+.text_center {
+    text-align: center;
+}
+
+.width_300 {
+    width: 300px;
+}
+
+.width_400 {
+    width: 400px;
+}
+
+.margin_3_0 {
+    margin: 3px 0;
+}
+
+.margin_10_20 {
+    margin: 10px 20px;
+}
+
+.margin_10_0 {
+    margin: 10px 0;
+}
+
+.margin_0_20 {
+    margin: 0 20px;
+}
+
+.margin_0_10 {
+    margin: 0 10px;
+}
+
+.margin_10_10 {
+    margin: 10px;
+}
+
+.margin_20_10 {
+    margin: 20px 10px;
+}
+
+.margin_0_5 {
+    margin: 0 5px;
+}
+
+.width_600 {
+    width: 600px;
+}
+
+.margin_left_600 {
+    margin-left: 600px;
+}
+
+.right-align-container {
+    margin-left: auto;
+    display: flex;
+    align-items: center;
+}