1 files changed, 35 insertions, 0 deletions
diff --git a/src/style.ts b/src/style.ts
new file mode 100644
index 0000000..93ce355
--- /dev/null
+++ b/src/style.ts
@@ -0,0 +1,35 @@
+type GmailCSSClass = string;
+
+const TOOLS_PANEL: GmailCSSClass = 'bAw';
+const SIDEBAR: GmailCSSClass = 'aeN';
+const MESSAGE_PAGER: GmailCSSClass = 'AO';
+
+
+type GmailCSSDefinitions = { [selector in GmailCSSClass]: string };
+
+var css: GmailCSSDefinitions = {};
+css[TOOLS_PANEL] = 'display: none;';
+css[MESSAGE_PAGER] = 'filter: invert(100%);';
+
+function construct_css(css: GmailCSSDefinitions): string {
+	var joined = '';
+
+	for (var selector in css) {
+		joined += `.${selector} { ${css[selector]} }`;
+	}
+
+	return joined;
+}
+
+function append_css(css: string): void {
+	var s = document.createElement('style');
+	var t = document.createTextNode(css);
+
+	s.appendChild(t);
+
+	document.head.appendChild(s);
+}
+
+append_css(
+	construct_css(css)
+);