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


.caption{
	padding:10px;
	color:red;
}

#main {
  margin: auto;
  width: 200px;
  padding: 10px;
  margin-top:50px;
  text-align: center;
  font-family: Arial, Helvetica, sans-serif;
}

input[type=password] {
  width: 198px;
  padding: 12px 20px;
  margin: 8px 0;
  box-sizing: border-box;
}

input[type=button], input[type=submit], input[type=reset] {
  background-color: #000000;
  border: none;
  color: white;
  padding: 5px 10px;
  text-decoration: none;
  cursor: pointer;
  margin:0 auto;
}