.centeralign {
  text-align: center;
}

.mdl-layout__header {
  background-color: #000;
}

a {
  text-decoration: none;
  color: #000;
}

a:hover {
  text-decoration: none;
  color: gray;
}

a:focus {  text-decoration: none;
  color: #000;
}

a:active {
  text-decoration: none;
  color: #D32F2F;
}

img {
  margin: 0 auto;
}