add custom styles

Author: pigr2

app/styles.css

@@ -0,0 +1,20 @@
+section {
+    margin-left: 2rem;
+    margin-right: 2rem;
+}
+proximity-selector, search-box {
+    display: flex;
+    flex-direction: column;
+    padding-bottom: 1.2rem;
+}
+proximity-selector.disabled {
+    color: #b9b9b9;
+}
+div.row {
+    margin-top: 1.6rem;
+}
+.state {
+    font-family: monospace;
+    font-size: smaller;
+    color: darkorange;
+}