main.css

/**
 * Copyright 2017 Google Inc. All Rights Reserved.
 *
 * 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.
 */

.mdl-card {
  width: 100%;
}

#demo-sign-in-card > .mdl-card__title {
  height: 125px;
}

#demo-create-message-result {
  margin-left: 10px;
}

.mdl-textfield, .mdl-textfield > textarea {
  width: 100%;
  resize: none;
}

h5 {
  margin: 20px 5px;
}

button:not(:first-child) {
  margin-left: 5px;
}

li:hover {
  background-color: rgba(158,158,158,.2);
  cursor: pointer;
}

li.selected {
  background-color: rgba(158,158,158,.4);
}

.demo-create-message {
  padding: 10px;
}

.demo-message-list,
.demo-message-details {
  padding-left: 10px;
}

.demo-message-list > ul {
  height: 335px;
  overflow: auto;
}

.demo-message-details > pre {
  height: 400px;
  overflow: auto;
}