Implement the new invite modal designs

src/Toast.module.css

@@ -0,0 +1,38 @@
+/*
+Copyright 2023 New Vector Ltd
+
+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.
+*/
+
+.toast {
+  color: var(--cpd-color-text-on-solid-primary);
+  background: var(--cpd-color-alpha-gray-1200);
+  padding-inline: var(--cpd-space-3x);
+  padding-block: var(--cpd-space-1x);
+  border: none;
+  border-radius: var(--cpd-radius-pill-effect);
+  box-shadow: var(--small-drop-shadow);
+  display: flex;
+  align-items: center;
+  gap: var(--cpd-space-1x);
+}
+
+.toast > h3 {
+  margin: 0;
+}
+
+.toast > svg {
+  color: var(--cpd-color-icon-on-solid-primary);
+  flex-shrink: 0;
+  margin-inline-end: calc(-1 * var(--cpd-space-1x));
+}