chrome/renderer/resources/plugins/plugin_placeholders.css

/* Copyright (c) 2012 The Chromium Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file. */

html, body {
  -webkit-user-select: none;
  font-family: sans-serif;
  height: 100%;
  margin: 0;
  overflow: hidden;
  text-align: center;
  width: 100%;
}

h1 {
  display: none;
  font-size: 10pt;
  font-weight: normal;
  padding: 0pt 10pt;
}

p {
  font-size: 8pt;
  padding: 0pt 14pt;
}

#t {
  background-color: #f7f7f7;
  color: #646464;
}

#outer {
  align-items: center;
  box-sizing: border-box;
  display: flex;
  height: 100%;
  justify-content: center;
  position: absolute;
  width: 100%;
  flex-direction: column;
}

.icon {
  max-height: 100%;
  max-width: 100%;
  opacity: .3;
}

@media (orientation: landscape) and (min-height: 2em) and (min-width: 14em) {
  #outer {
    flex-direction: row;
  }
  .icon {
    max-height: 100%;
    max-width: 50%;
  }
  h1 {
    display: block;
  }
}

@media (min-height: 7em) and (min-width: 6em) {
  #outer {
    flex-direction: column;
  }
  .icon {
    max-height: 50%;
    max-width: 100%;
  }
  h1 {
    display: block;
  }
}