Initial support for MSC2858

res/css/_components.scss

@@ -124,6 +124,7 @@
 @import "./views/elements/_RichText.scss";
 @import "./views/elements/_RoleButton.scss";
 @import "./views/elements/_RoomAliasField.scss";
+@import "./views/elements/_SSOButtons.scss";
 @import "./views/elements/_Slider.scss";
 @import "./views/elements/_Spinner.scss";
 @import "./views/elements/_StyledCheckbox.scss";

res/css/structures/auth/_Login.scss

@@ -33,12 +33,6 @@ limitations under the License.
     cursor: default;
 }
 
-.mx_AuthBody a.mx_Login_sso_link:link,
-.mx_AuthBody a.mx_Login_sso_link:hover,
-.mx_AuthBody a.mx_Login_sso_link:visited {
-    color: $button-primary-fg-color;
-}
-
 .mx_Login_loader {
     display: inline;
     position: relative;

res/css/views/elements/_SSOButtons.scss

@@ -0,0 +1,41 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+.mx_SSOButtons {
+    display: flex;
+    justify-content: center;
+
+    .mx_SSOButton {
+        position: relative;
+
+        > img {
+            object-fit: contain;
+            position: absolute;
+            left: 12px;
+            top: 12px;
+        }
+    }
+
+    .mx_SSOButton_mini {
+        box-sizing: border-box;
+        width: 50px; // 48px + 1px border on all sides
+        height: 50px; // 48px + 1px border on all sides
+
+        & + .mx_SSOButton_mini {
+            margin-left: 24px;
+        }
+    }
+}