html, body {
  margin: 0;
  padding: 0;
  
  
}
canvas {
  display: block;
}

header{
  text-align: center;
  font-size: large;
  font-family:'HGP行書体';
}
main p{
  text-align: center;
  font-family:'HGP行書体';
}

canvas {
  
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  margin: auto;
}

#field{
  text-align:center;
}

#button1{
  text-align:center;
}