doc.silverstripe.org/sapphire/css/FileIFrameField.css

/*
typography.css has been removed from sapphire, why shall we still has this? a dynamic typographp.css should be used by
server side call, like Requirements::css(); 
@import url("typography.css");
*/

html,body {
	padding: 0;
	margin: 0;
	border-style: none;
	height: 100%;
	overflow: hidden;
}

form {
	margin: 0; padding: 0;
}

h2 {
	margin: 0;
	font-size: 1.4em;
}

/**
 * Selection Groups
 */
.SelectionGroup {
	padding: 0;
	margin: 10px 0 0 0;
}
.SelectionGroup li {
	list-style-type: none;
	margin: 0 0 4px;
}
.SelectionGroup li label {
	font-size: 11px;
}
.SelectionGroup li input.selector {
	width: 20px;
	margin-top: 0;
}


.SelectionGroup li div.field {
	display: none;
}
.SelectionGroup li.selected div.field {
	display: block;
	margin-left: 30px;
	margin-bottom: 1em;
	margin-top: 4px;
}
.mainblock .SelectionGroup li.selected div.field {
	margin-left: 27px;
	margin-bottom: 4px;
}

.SelectionGroup li.selected label.selector {
	font-weight: bold;
}



/**
 * TreeDropdownField stying
 */
.SelectionGroup div.TreeDropdownField {
	width: 241px;
	padding: 0;
}
html>body div.TreeDropdownField {
	position:relative;
}

.SelectionGroup div.TreeDropdownField span.items {
	display: block;
	height: 100%;
	border: 1px #7f9db9 solid;
	cursor: pointer;
	width: 214px;
	float: left;
	padding-top: 2px;
	padding-bottom: 2px;
	background-color: white;
}

.SelectionGroup div.TreeDropdownField div.tree_holder {
	clear: left;
	cursor: default;
	border: 1px black solid;
	margin: 0;
	height: 180px;
	overflow: auto;
	background-color: white;
	/**
	 * HACK IE6, see http://www.hedgerwow.com/360/bugs/css-select-free.html
	 */
	position:absolute;
	z-index:10;
	width:238px;/*must have for any value*/
}

html>body div.TreeDropdownField div.tree_holder {
	top: 20px;
	left: 0px;
	z-index: 1000;
}

/**
 * HACK IE6, see http://www.hedgerwow.com/360/bugs/css-select-free.html
 */
.SelectionGroup div.TreeDropdownField div.tree_holder iframe {
	display:none;/* IE5*/
	display/**/:block;/* IE5*/
	position:absolute;
	top:0;
	left:0;
	z-index:-1;
	filter:mask();
	width:180px; /*must have for any big value*/
	height:200px/*must have for any big value*/;
	border: 0;
}

div.TreeDropdownField a.editLink {
	border-width: 1px 1px 1px 0;
	background: url(../../sapphire/images/TreeDropdownField_button.gif) left top no-repeat;
	width: 19px;
	height: 21px;
	margin: 0;
	padding: 0;
	float: left;
	clear: right;
	z-index: 0;
	overflow: hidden;
}

/* added block/width so tree values don't disappear in ie7 */
.SelectionGroup div.TreeDropdownField ul.tree li {
	display: block;
	width: 100%;
}

.Actions {
	text-align: right;
	margin: 0;
	position: absolute;
	right: 5px;
	bottom: 5px;
}

.mainblock {
	float: left;
	border: 1px solid #ccc; 
	padding: 5px;
	margin-right: 5px;
	height: 140px;
	position: relative;
}
	.mainblock.editform {
		width: 275px;
	}
	.mainblock.attached {
		position: absolute;
		left: 270px;
		width: 100px;
	}

.mainblock form fieldset {
	border: none;
}

.mainblock form div.Actions input {
	font-size: 11px;
}