Added ability to switch between light and dark mode

static/themes/dark.css

@@ -0,0 +1,18 @@
+:root {
+    --bg: #282c34;
+    --bg-secondary: #474d57;
+    --bg-grad-1: #484e58;
+    --bg-grad-2: #4e5560;
+    --bg-grad-3: #59616d;
+    --bg-grad-4: #606a7b;
+    --bg-grad-5: #606978;
+    --input: #4e5560;
+    --fg: #ABB2BF;
+    --header: #E06C75;
+    --link: #98C379;
+    --hover: #56B6C2;
+    --glow: #C678DD;
+
+    --green: #98C379;
+    --red: #E06C75;
+}

static/themes/light.css

@@ -0,0 +1,18 @@
+:root {
+    --bg: #fff;
+    --bg-secondary: #ebebeb;
+    --bg-grad-1: #c1c1c1;
+    --bg-grad-2: #a1a1a1;
+    --bg-grad-3: #858585;
+    --bg-grad-4: #616161;
+    --bg-grad-5: #484848;
+    --input: #a9a9a9;
+    --fg: #2f2f2f;
+    --header: #514a4a;
+    --link: #df0000;
+    --hover: #4f4b489b;
+    --glow: #545454;
+    
+    --green: #98C379;
+    --red: #E06C75;
+}