/*
CSE 190 M, Homework 7 (Fifteen Puzzle)
*/

body, button {
	font-family: cursive;
	font-size: 14pt;
	text-align: center;
}

/* The area that holds the 15 puzzle pieces. */
#puzzlearea {
	font-size: 40pt;
	width: 400px;
	height: 400px;
	margin-left: auto;
	margin-right: auto;
	position: relative;
}

/* This class should be applied to each of the 15 puzzle pieces. */
.puzzlepiece {
	border: 5px solid black;
	width: 90px;
	height: 90px;
	position: absolute;
}

/* This class should be applied to a puzzle piece that can be moved. */
.movablepiece:hover {
	border-color: red;
	color: red;
}

#throbber {
	visibility: hidden;
	height: 30px;
	width: 30px;
	vertical-align: middle;
}



/* grading styles -- for TAs only; not required by students */
#gradingarea {
	position: fixed;
	right: 0px;
	top: 0px;
	z-index: 999999;
}

.valid {
	background-color: #bfb;
}

.invalid {
	background-color: #f88;
}