* {
	font-family: Arial;
}
html {
	position: absolute;
	height: 100%;
	width: 100%;
}
span {
	font-family: Monospace;
	font-size: 140%;
}
.content {
	width: 600px;
	margin: 0 auto;
}
.part {
	width:50%; float: left;
}
.top {
	text-align: center;
}
.center {
	width: 250px;
	margin-top: 100px;
}
.bottom {
	width: 250px;
	margin-top: 100px;
}
.button, .input, .select {
	margin: 0;
	margin-top: 2px;
	margin-bottom: 3px;
	height: 35px;
}
.input {
	border: 2px solid lightgray;
	padding: 0;
	width: calc(100% - 4px);
}
.button {
	font-weight: bold;
	border: 0;
	width: 100%;
}
.select {
	border: 2px solid lightgray;
	padding: 0;
	width: 100%;
}
@media screen and (max-width: 900px) {
	.content {
		width: 450px;
	}
}
@media screen and (max-width: 450px) {
	.content {
		width: 300px;
	}
	.part {
		width: 100%;
	}
}
.hidden {
	display: none;
}