amp-story-player.css

/**
 * Copyright 2020 The AMP HTML Authors. 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.
 */

amp-story-player {
  width: 360px;
  height: 600px;
  position: relative;
  display: block;
}

amp-story-player a:first-of-type {
  width: 100%;
  height: 100%;
  background: var(--story-player-poster, lightgrey);
  background-size: 100% 100%;
  display: block;
}

amp-story-player a:not(:first-of-type) {
  visibility: hidden;
}

amp-story-player::after {
  content: " ";
  position: absolute;
  box-sizing: border-box;
  top: calc(50% - 32px);
  left: calc(50% - 32px);
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 6px solid #fff;
  border-color: #fff transparent #fff transparent;
  filter: drop-shadow(0px 1px 3px rgba(0, 0, 0, 0.25));
  animation-name: i-amphtml-story-player-spinner;
  animation-duration: 4400ms;
  animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  animation-iteration-count: infinite;
}

@keyframes i-amphtml-story-player-spinner {
  12.5% { transform: rotate(135deg) }
  25%   { transform: rotate(270deg) }
  37.5% { transform: rotate(405deg) }
  50%   { transform: rotate(540deg) }
  62.5% { transform: rotate(675deg) }
  75%   { transform: rotate(810deg) }
  87.5% { transform: rotate(945deg) }
  to    { transform: rotate(1080deg) }
}

.i-amphtml-story-player-loaded::after {
  visibility: hidden;
}