* {
	padding:0;
	margin:0;
	-webkit-box-sizing:border-box;
	-moz-box-sizing:border-box;
	box-sizing:border-box;
}
#efecto{
 

  
    -webkit-transition: width  0.9s, background  0.9s;
    -moz-transition: width  0.9s, background 0.9s;
    -o-transition: width  0.9s, background  0.9s;
    transition: width  0.9s, background  0.9s;
  
     -webkit-transition-timing-function: linear;
    -moz-transition-timing-function: linear;
    -o-transition-timing-function: linear;
    transition-timing-function: linear;
}

#efecto:hover {
    width: 100px;
    background: #428bca;
}




.menu_bar {
	display:none;
}



header nav {
	background:darkorange;
	width: 100%;
	height: 80px;
	position: fixed;
	z-index: 11;
	top:0;
	box-shadow: 0 0 32px rgba(0,0,0,0.5);
	

}

header nav ul {
	list-style:none;
	float:right;
	margin: auto;
	font-weight: bold;
}

header nav ul li {
	display:inline-block;
	/*La razon por la que no usamos floar en vez de inline-block es
	porque no vamos a poder usar overflows en el header nav ul*/
	position: relative;
	
}


header nav ul li a {
	color:white;
	font-size: 18px;
	font-family: sans-serif;
	text-decoration: none;
	display: inline-block;
	padding:30px 6px 0px 6px;
	margin-left: auto;
	margin-right: auto;
	height: 80px;



}

header nav ul li:hover {
	background:#555555e3;
	border-radius: 10px;

	 color: white;
    
    -webkit-transition: width 0.9s, background 0.9s;
    -moz-transition: width 0.9s, background 0.9s;
    -o-transition: width 0.9s, background 0.9s;
    transition: width 0.9s, background 0.9s;
  
	
}

/*efecto de linea*/
.container {
  display: flex;
  z-index:10;

}



.item:before {
  content: "";
  display: block;
  width: 0;
  height: 3px;
  background: #fff;
  position: absolute;
  bottom: 0;
  transition: all 0.9s;
}

.item:hover:before {
  width: 100%;
}



.tres:before {
  left: 50%;
}

.tres:hover:before {
  left: 0;
  
}
/*efecto de linea*/


header nav ul li span {
	margin-right:10px;
}
#logo{
	height: 77px;
	width: 330px;

}


/*responsive*/



@media screen and (max-width:640px) {
	
  
	.menu_bar {
		width: 100%;
		background:darkorange;
		display: block;
		position: fixed;
		top:0;
		z-index: 100;
	}
	.menu_bar .bt-menu {
		display: block;
		padding: 15px;
		color:#fff;
		overflow: hidden;
		font-size:20px;
		font-weight:bold;
		text-decoration: none;
	}
	.menu_bar span {
		float: right;
		font-size: 40px;
	}
	header nav {
		margin: 0;
		height: auto;
		position:fixed;
		right: 100%;
		overflow: hidden;
		margin-top:70px;
		background:#808080;
	}
	header nav ul li a {
		color:#DCDCDC;
		text-align: center;
		font-size: 13.5px;
	    border-bottom: 4px solid darkorange;
	    padding-top: 10px;
	 	height: 40px;
	 	width: 100%;
	}
	header nav ul  {
		width: 100%;	
	}
	header nav ul li  {
		display: block;
	}
	header nav ul li a:hover {
		color:white;
	}

	#logo{
		display: none;
	}

	
}
@media screen and (max-width:1024px) and (min-width:640px) {
    .menu_bar {
		width: 100%;
		background:darkorange;
		display: block;
		position: fixed;
		top:0;
		z-index: 100;
	}
	.menu_bar .bt-menu {
		display: block;
		padding: 20px;
		color:#fff;
		overflow: hidden;
		font-size:20px;
		font-weight:bold;
		text-decoration: none;
	}
	.menu_bar span {
		float: right;
		font-size: 40px;
	}
	header nav {
		margin: 0;
		height: auto;
		position:fixed;
		right: 100%;
		overflow: hidden;
		margin-top:82px;
		background:#808080;
	}
	header nav ul li a {
		color:#DCDCDC;
		text-align: center;
		font-size: 15px;
	    border-bottom: 4px solid darkorange;
	    padding-top: 10px;
	 	height: 50px;
	 	width: 100%;
	}
	header nav ul  {
		width: 100%;	
	}
	header nav ul li  {
		display: block;
	}
	header nav ul li a:hover {
		color:white;
	}

	#logo{
		display: none;
	}
}

@media screen and (max-width: 1200px) and (min-width: 1025px){
		header nav ul li {
			

		}


		header nav ul li a {
			font-size: 14px;
			margin: auto;
			padding: 30px 10px 0px 10px;
		}
		#logo{
		width: 240px;
	}
		
}