Add dark theme

public/global.css

@@ -5,30 +5,12 @@ html, body {
 }
 
 body {
-	color: #333;
 	margin: 0;
 	padding: 8px;
 	box-sizing: border-box;
 	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
 }
 
-a {
-	color: rgb(0,100,200);
-	text-decoration: none;
-}
-
-a:hover {
-	text-decoration: underline;
-}
-
-a:visited {
-	color: rgb(0,80,160);
-}
-
-label {
-	display: block;
-}
-
 input, button, select, textarea {
 	font-family: inherit;
 	font-size: inherit;
@@ -36,14 +18,11 @@ input, button, select, textarea {
 	padding: 0.4em;
 	margin: 0.5em;
 	box-sizing: border-box;
-	border: 1px solid #ccc;
+	border-width: 1px;
+	border-style: solid;
 	border-radius: 2px;
 }
 
-input:disabled {
-	color: #ccc;
-}
-
 /* Chrome, Safari, Edge, Opera */
 input::-webkit-outer-spin-button,
 input::-webkit-inner-spin-button {
@@ -55,21 +34,3 @@ input::-webkit-inner-spin-button {
 input[type=number] {
   -moz-appearance: textfield;
 }
-
-button {
-	color: #333;
-	background-color: #f4f4f4;
-	outline: none;
-}
-
-button:disabled {
-	color: #999;
-}
-
-button:not(:disabled):active {
-	background-color: #ddd;
-}
-
-button:focus {
-	border-color: #666;
-}