:root {
  font-family: 'Poppins', sans-serif;
  margin: 0 auto;
  display: table;
  height: 100%;
}
* {
box-sizing: border-box;
  padding: 0;
line-height: 1.5;
}
h1 {
  text-align: center;
}
footer {
background-color: #dedede;
color: #333;
font-size: 20px;
text-align: center;
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
}
@media (max-width: 500px) {
  footer a {
    display: block;
  }
}