--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/options/options.css	Fri Dec 07 23:00:41 2018 +0100
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2018 Guido Berhoerster <guido+feed-preview@berhoerster.name>
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+@import url("chrome://browser/content/extension.css");
+@import url("../web_resources/style/photon-colors.css");
+
+:root {
+  --blue-50-a30: rgba(10, 132, 255, 0.3);
+  --red-50-a30: rgba(255, 0, 57, 0.3);
+  --selection-item-background-color: var(--grey-90-a10);
+  --selection-selected-background-color: var(--blue-50);
+  --selection-selected-color: var(--white-100);
+  --text-input-border-color: var(--grey-90-a30);
+  --text-input-hover-border-color: var(--grey-90-a50);
+  --text-input-focus-border-color: var(--blue-50);
+  --text-input-invalid-border-color: var(--red-50);
+  --secondary-color: var(--grey-50);
+  --text-input-shadow: 0 0 0 4px var(--blue-50-a30);
+  --invalid-shadow: 0 0 0 4px var(--red-50-a30);
+  --selection-border: 1px solid var(--grey-90-a30);
+}
+
+body {
+  padding: 0 4px;
+}
+
+h1 {
+  margin: 0 0 16px 0;
+  font-size: 1.29em;
+  font-weight: bold;
+}
+
+input[type="text"] {
+  border-radius: 2px;
+  font-size: 15px;
+  padding: 8px;
+  min-height: 32px;
+}
+
+.browser-style > input[type=text] {
+  border-color: var(--text-input-border-color);
+  box-shadow: none;
+}
+
+.browser-style > input[type=text]:hover {
+  border-color: var(--text-input-hover-border-color);
+  box-shadow: none;
+}
+
+.browser-style > input[type=text]:focus,
+.browser-style > input[type=text]:focus:hover {
+  border-color: var(--text-input-focus-border-color);
+  box-shadow: var(--text-input-shadow);
+}
+
+.browser-style > input[type=text]:invalid,
+.browser-style > input[type=text]:invalid:hover,
+.browser-style > input[type=text]:invalid:focus:hover,
+.browser-style > input[type=text]:invalid:focus {
+  border-color: var(--text-input-invalid-border-color);
+  box-shadow: var(--invalid-shadow);
+}
+
+button.browser-style {
+  border-radius: 2px;
+  padding: 2px 16px;
+}
+
+#feed-reader-selection {
+  margin: 4px 0;
+  padding: 0;
+  border: var(--selection-border);
+  border-radius: 2px;
+  width: 100%;
+  height: 10em;
+  overflow: auto;
+}
+
+#feed-reader-selection:focus-within {
+  border: 1px dotted var(--selection-selected-background-color);
+}
+
+.feed-reader-item {
+  list-style: none;
+}
+
+.feed-reader-item label {
+  position: relative;
+}
+
+.feed-reader-item input[type=radio] {
+  /*
+   * take the actual radio button out of the page flow and make it invisible
+   * without hiding it (using "display: none" or "visibility: hidden") so that
+   * keyboard focus handling keeps working as expected
+   */
+  position: absolute;
+  -moz-appearance: none;
+  appearance: none;
+  width: 0;
+  height: 0;
+  opacity: 0;
+}
+
+.feed-reader-item input[type=radio]:checked + .feed-reader-content {
+  background-color: var(--selection-selected-background-color);
+  color: var(--selection-selected-color);
+}
+
+.feed-reader-content {
+  padding: 4px 8px;
+  white-space: nowrap;
+}
+
+.feed-reader-item:nth-child(even) .feed-reader-content {
+  background-color: var(--selection-item-background-color);
+}
+
+.feed-reader-content .feed-reader-title,
+.feed-reader-content .feed-reader-url-template {
+  display: inline-block;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.feed-reader-content .feed-reader-title {
+  width: 30%;
+}
+
+.feed-reader-content .feed-reader-url-template {
+  width: 70%;
+}
+
+.button-box {
+  border: none;
+  padding: 0;
+  margin: 4px 0 0 0;
+  text-align: right;
+}
+
+.button-box button + button {
+  margin-left: 8px;
+}
+
+#add-feed-reader label {
+  display: block;
+  font-size: 13px;
+  margin: 4px 0;
+}
+
+#add-feed-reader input[type="text"] {
+  display: block;
+  width: 100%;
+}
+
+.caption {
+  font-size: 11px;
+  margin: 4px 0;
+  color: var(--secondary-color);
+}