body {
  background-color: rgb(0, 0, 0);
  color: rgb(255, 255, 255);
  font-family: Arial;
  text-align: center;
}

header {
  height: 150px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  width: 100%;
}

footer {
  height: 150px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  position: fixed;
  width: 100%;
}


header { top: 0; }
footer { bottom: 0; }


header img, footer img {
  height: 100%;
  width: auto;
  image-rendering: pixelated;
}

@media (max-width: 600px) { 
  header { height: 100px; } 
}

@media (max-width: 400px) { 
  header { height: 80px; } 
}