*{
	margin: 0;
	padding: 0;
}
html,body{
	width: 100%;
	height: 100%;
}
body{	
	background-color: #FFFFFF;
}

img{ border:0;}




.cabecera{
	position: relative;
	width: 100%;
	height: 68px;
	background: url(../images/fondo_menu.jpg);
	z-index: 3;
	display: inline-block;
	/*display: none;*/
}

.logo{
	top: 3px;
	position: relative;
	text-align: left;
	margin-left: 200px; 
	z-index: 4;	

}
.contenido{
	width: 100%;
	height: 500px;
	overflow: hidden;
	position: relative;
	z-index: 2;
}

.btn_web{
	width: 89px;
	height: 38px;
	position: absolute;
	top: 30%;
	margin-top: -10px;
	left: 50%;
	margin-left: 400px;
	z-index: 5;
	cursor: pointer;
	background: url(../images/ico_home.png) top;
}

.btn_web:hover{
	background-position: bottom;
}

.btn_web a{
	width: 100%;
	height: 100%;
	position: absolute;
	top: 0;
	left: 0;
	z-index: 2;
	background: url(../images/a_bg.png);


}

@media screen and (max-width: 1024px){
	.btn_web{
		/*width: 30%;
		max-width: 187px;
		height: auto;*/
		position: absolute;
		top: 10px;
		margin-top: 0;
		right: 10px;
		left: auto;		
		margin-left: 10px;
		z-index: 5;
		cursor: pointer;
	}
}
@media screen and (max-width: 640px) {
	.logo{
		position: relative;
		text-align: left; 
		margin-left: 50px;
		z-index: 4;	
		top: 3px;
	}
}

@media screen and (width: 810px){
	.btn_web{
		display: none;
		position: absolute;
		top: 10px;
		margin-top: 0;
		left: 100px;
		margin-left: 0;
		z-index: 5;
		cursor: pointer;
	}
}