*{
  margin:0; 
  padding:0; 	
}

#estrutura_modal{
	margin:0 auto; 
	width:866px; 
	border:2px solid black; 
	background-color:white;
	overflow:hidden;
	padding:5px;
}

#desc_site{
	width:260px; 
	float:left;
	margin:0 26px 0 20px;
}

#botao_fechar{
	margin:70px 0 0 0px; 
	border:0; 
	cursor:pointer;
}
#screens{
	width:555px; 
	border:1px solid balck; 
	background-color:#D8D8D8; 
	float:right;
	overflow:hidden;
}

#screens_img{
	     width:425px; 
		 height:435px; 
		 float:left;
		 padding:5px;
}
#portifolio li img {
	 border:1px solid #666;
	 margin-bottom:5px;
	}
	
#portifolio  {
	list-style:none;
}

.btn_anterior, .btn_proximo{
		width:49px; 
		float:left;
		padding:200px 0 0 10px; 
		cursor:pointer;
}