body, html {
  height: 100%;
  display: grid;
  background-color: #404040;
  font-size: 1em;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
}

input[type=submit] {
	align: center;
  border-radius: 4px;
  background-color: #00FF90;
  border: none;
  color: #000000;
  text-align: center;
  font-size: 1em;
  padding: 10px;
  width: 90%;
  transition: all 0.5s;
  cursor: pointer;
  margin: 5px;
}

input[type=submit]:hover {
  background-color: #4CFF00
}

#content {
	text-align: center;
	margin: auto;
}