Change font

searx/static/themes/pix-art/less/search.less

 	border: 1px solid @color-search-border;
 	color: @color-search-font;
 	font-size: 16px;
+	font-family: "Courier New", Courier, monospace;
 	height: 28px;
 	margin: 0;
 	outline: medium none;

searx/static/themes/pix-art/less/style.less

 // Main LESS-Code
 
 html {
-	font-family: sans-serif;
+	font-family: "Courier New", Courier, monospace;
 	font-size: 0.9em;
 	.text-size-adjust;
 	color: @color-font;
 	}
 }
 
-input[type="button"] {
+input[type="button"], 
+input[type="submit"] {
+	font-family: "Courier New", Courier, monospace;
 	padding: 4px 12px;
 	margin: 2px 4px;
 	display: inline-block;