#header{
	position: sticky;
    top: 0;
    background: #fff986;
}
.container-for-text{
	text-align: center;
	margin: 10px;
	overflow: auto;
}
.line-valid{
	font-family: monospace;
    font-size: larger;
}
.line-not-valid{
	font-family: monospace;
    font-size: larger;
    background: lightcoral;
}
body{
	background-image: url('/images/background.png');
	background-repeat: no-repeat;
	background-attachment: fixed;
}