body {
  
	background: url( "../imagenes/campo6.jpg") no-repeat center center fixed;
	background-size:cover;}



.contenedor {
			position: relative;
			
			width:1000px;
			height: 600px;
			
		}
		.cabecera {
			display: inline-block;
			text-decoration: none;
			padding: 10px;
			border: 2px solid;
			position: relative;
			color:black;
			border-top-left-radius: 5px;
			border-top-right-radius: 5px;
			transform: translateY(2px);
			z-index: 2;
		}
		.pestana {
			position: absolute;
			width:54%;
			border: 2px solid;
			color:black;
			background:white;
			height: 100%;
			visibility: hidden;
			opacity: 0;
			transition: visibility 1s, opacity 1s;
			
		}
		
		.p-activa {
			visibility: visible;
			opacity: 80%;
		}
		.c-activa {
			
			background:white;
			border-bottom-color: white;
			opacity: 80%;
		}
		
		p{
			text-align: justify;
			padding: 10px;
		}
		@media( max-width:540px){
			
			body {
  
				background: url( "../imagenes/campo6.jpg") no-repeat center,center;
				background-size:cover;
				}
			
			.pestana {
			 width:450px;
			 font-size:16px;
			 position:absolute;
			 top:15%;
			  height:500px;
			}
		div.pestana img{ scale:70%;}
		
		div.pestana table{ width:70%;
			
		                  background: white;}
						
	   .cabecera{ width:100px;
	            font-size:12px;}
		.contenedor{width:500px;}
		}