Created main js and css files. Added some of the iniitialization for the ui

main.css

@@ -0,0 +1,39 @@
+body {
+	margin:0;
+}
+
+#root {
+	height: 100vh;
+	width: 100vw;
+	margin: 0;
+	display: flex;
+	flex-direction: column;
+	justify-items: stretch;
+	align-items: stretch;
+}
+
+#navigation {
+	height: 50px;
+	box-shadow: inset 0 -2px 3px 0 #888;
+}
+
+#view {
+	flex: 1;
+	display: grid;
+	grid-template-columns: 1fr 1fr 1fr 1fr;
+	grid-template-rows: 1fr 1fr 1fr 1fr;
+	grid-gap: 5%;
+	padding: 5%;
+}
+
+.pecSlot {
+	border: solid 3px #666;
+	border-radius: 6px;
+	user-select: none;	
+}
+
+.empty {
+	color: #666;
+	font-size: 300%;
+	text-align: center;
+}