body {
	background: #1b1b1b ; 
	color: #fff ;
}

h1 {
	text-align: center ;
	color:yellow ;
}
img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  max-width: 100%;
  height: auto;
}

.button-row {
  text-align: center;
  margin: 2rem 0;