body { 
	margin: 0;
	font-family: Arial;
}
h1, h2 {
	text-align: center;
}
.center {
	width: 50%;
	margin: 0 auto;
}
.panel-body {
	overflow-x: scroll;
}
#examples a {
	display: block;
	text-align: center;
	font-size 
}
.page {
	display: none;
}
#first {
	display: block;
}
.InputPanelItem label {
	display: inline-block;
}
#main_tab {
	display: none;
}
.req {
	color: #f00;
}
.many {
	color: #00f;
}

#spinner {
	position: absolute;
	height: 100px;
	width: 100px;
	top: 50%;
	left: 50%;
	margin-left: -50px;
	margin-top: -50px;
	z-index: 1000;
	background-size: 100%;
	
    border: 16px solid #f3f3f3; /* Light grey */
    border-top: 16px solid #3498db; /* Blue */
    border-radius: 50%;
    animation: spin 2s linear infinite;

    display: none;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

button {
	border: none;
	color: white;
	background-color: #008CBA;
	margin: 4px 2px;
    cursor: pointer;
    text-align: center;

}

button:disabled {
	background-color: #cccccc;
}