/** back top**/

.back-top { bottom: 100px; right: 10px; margin-bottom: 0; display: block; position: fixed; display: scroll; display: none;
opacity: 1; z-index: 999;
/* For IE 5-7 */
filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=100); }
.back-top a { width: 40px; nowhitespace: afterproperty; height: 40px; /*display: none; */ display: block;  text-align: center; text-transform: uppercase; text-decoration: none; background: rgb(69, 90, 100)  url("../images/btn_backtotop.png") no-repeat center center; border-radius: 5px; /* transition */ -webkit-transition: 1s;-moz-transition:1s;transition:1s; ; }

.back-top a:hover { /* background-color: #c8252c */ background: rgb(19, 135, 164) url("../images/btn_backtotop.png") no-repeat center center; } /* arrow icon (span tag) */

.back-top span { width: 40px; nowhitespace: afterproperty; height: 40px; display: block; border-radius: 10px; /* transition */ -webkit-transition: 1s;-moz-transition:1s;transition:1s; ; }

.back-top img{ width:40px ; height:40px}


@media (max-width: 768px) {
	.back-top a { 
		width: 30px; 
		height: 30px;
	}
}