html, body {
    height: 100%;
    width: 100%;
    padding: 0;
    margin: 0;
  background: #000000;
}

body {
    display: flex;
    flex-direction: column;
}

header {
    height: 290px;
}

main {
    flex: auto;
}

footer {
  color: #fff;
  height: 20px;
  text-align: center;
  margin-top: 0px;
font-size: 12px;
}

object.displayed {
    width: 45%;
    display: block;
    margin-left: auto;
    margin-right: auto }

img.displayed {
    display: block;
    margin-left: auto;
    margin-right: auto }