body{
	background-color: #e3e3e3;
	padding: 0px;
	margin: 0px;
}
[draggable]{
	user-select: none;
}
.columns{
	width: 100%;
}
.column{
	height: 100px;
	width: 100px;
	border: 1px solid black;
	float: left;
	margin: 10px;
	background-color: #d2d2d2;
	text-align: center;
	font-size: 1.25em;
}
.column div{
	width: 100%;
	height: 100%;
}
.over{
	border: 1px dashed black;
}