.spoilers-body {
	border: 1px dashed #000;
	background-color: #EEE;
	padding: 3px;
}

.spoilers-button-container {
	padding: 1px 0;
}

.spoilers-button {
	background: #AAA;
	background: -moz-linear-gradient(top, #EEE, #AAA);
	background: -webkit-gradient(left top, left bottom, color-stop(0%, #EEE), color-stop(100%, #AAA));
	background: -webkit-linear-gradient(top, #EEE, #AAA);
	background: -o-linear-gradient(top, #EEE, #AAA);
	background: -ms-liner-gradient(top, #EEE, #AAA);
	background: linear-gradient(to bottom, #EEE, #AAA);
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#EEE', endColorstr='#AAA',GradientType=0 );
	border: 1px solid #999;
	border-radius: 5px;
	padding: 3px 10px;
	transition: 0.1s background-position linear;
}

.spoilers-button:hover {
	background-position: 0 -6px;
	cursor: pointer;
}

.spoilers-body {
	border: 1px dashed #000;
	background-color: #EEE;
	padding: 3px;
	display: none;
}

.spoilers-button-container {
	padding: 1px 0;
}

.spoilers-button {
	background: #AAA;
	background: -moz-linear-gradient(top, #EEE, #AAA);
	background: -webkit-gradient(left top, left bottom, color-stop(0%, #EEE), color-stop(100%, #AAA));
	background: -webkit-linear-gradient(top, #EEE, #AAA);
	background: -o-linear-gradient(top, #EEE, #AAA);
	background: -ms-liner-gradient(top, #EEE, #AAA);
	background: linear-gradient(to bottom, #EEE, #AAA);
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#EEE', endColorstr='#AAA',GradientType=0 );
	border: 1px solid #999;
	border-radius: 5px;
	padding: 3px 10px;
	transition: 0.1s background-position linear;
}

.spoilers-button:hover {
	background-position: 0 -6px;
	cursor: pointer;
}

.spoilers-hide {
	display: none;
}

Use CSS to hide by default.
Use CSS to hide by default.