body {
  background-color: teal;
}

.embed {
  margin: 0 auto;
  padding: 0;
  font-style: normal;
  line-height: 1.2;
  width: 100%;
  height: calc(27.2vw);
}

/* separate all windows by 10px */
div.window-container > div.window:not(:last-child) {
  margin-bottom: 10px;
}

.footer {
  left: 0;
  bottom: 0;
  width: 100%;
  color: black;
  text-align: center;
}