* {
    padding: 0;
    margin: 0;
}

body, html {
  background: #FFF;
  color: #333;
  overflow: hidden;
}

.image-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  max-width: 400px;
}

.image-cover {
  position: relative;
  top: 0;
  left: 0;
  right: 0;
  margin: auto;
  width: 100%;
}

.iframe {
  width: 100vw;
  height: 100vh;
  border: none;
}