html, body {
  height: 100%;
  width: 100%;
  background-color: #004cff;
}

table,td {
  background-color: blue;
  margin-left: auto; 
  margin-right: auto;
  width:50 ;
  height:50 ;
}

h1 {
  color: red;
  font-family:Arial, Helvetica;
  font-weight: 900;
}

button {
  background-color: yellow;
  color: red;
  font-family: sans-serif;
  font-weight: 900; 
  font-size: 16px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

p, div {
  font-family:Roboto;
  color: yellow;
  margin-left: auto;
  margin-right: auto;
}