body,
html {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.ad {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}



footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 80px;
  background-color: #FFF1E2;
  color: #000;
  font-weight: bold;
  text-align: center;
  font-size: 1.7em;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  font-family: Arial, sans-serif;
}