* {    
    
	border: 0;  
	margin: 0;
	padding: 0;		
 }			


 article, figcaption, figure, footer,header, hgroup,nav, section {  
    display: block;     
 }

 audio, iframe, img, video {      
     max-width: 100%;      
             
}  



body {  

	 background-color: #000000;  
}



section#contenedor_principal {  

	    margin: 0.5em auto; 
        padding: 0; 
        text-align: center;    
        width: 600px;
  
}




h1  {  

	 color: #000000; 
	 font-family: verdana;
	 font-size: 1.5em;	 
}


h2  {  

	 color: #FFFFFF; 
	 font-family: verdana;
	 font-size: 2em;
	 
}


header  {  

	 padding: 1em;
	 text-align: center;
}



article#contenedor_imagen_cronometro {  
     
	 background: #C0FF00;;
     border-radius: 0.5em;
     display: inline-block; 
     max-width: 960px; 
     min-height: 400px;  
     text-align: center;
     vertical-align: top;                                   
     width: 90%;  
     padding: 0.5em 0.5em; 
     margin: 0.5em;
      
}



 div#caja_imagen_cronometro {  
 
            z-index: 1;
            text-align: center;
            position: relative;                      
            padding: 0.5em 0.5em; 
            margin: 0.5em;
       
}



    div#cronometro_relog {  

            font-family: verdana ;
            font-size: 3em;
            position: absolute;             
            z-index: 2;
            top: 63%;
            left: 40%;
                     
     
}


article#botones_cronometro {  
     
     background: #C0FF00;;
     border-radius: 0.5em;
     display: inline-block; 
     margin: 1em;
     padding: 1em; 
     padding: 0.25em;
     text-align: center;                                  
      width: 90%;  
       
}

article#captura_segundos_cronometro {  
     
     background: #C0FF00;;
     border-radius: 0.5em;
     display: inline-block; 
     margin: 1em;
     padding: 1em; 
     padding: 0.25em;
     text-align: center;                                  
      width: 90%;  
       
}




 
   #cambiar {

            border-radius: 0.5em;
            background-color: #000000;
            font-size: 1.2em;
            color:#FFFFFF;
            width:auto;
            height:auto;
            padding: 0.5em 0.5em;
            margin: 0.5em;
            
        }


  #inicializar {
        
            border-radius: 0.5em;
            background-color: #000000;
            font-size: 1.2em;
            color:#FFFFFF;
            width:auto;
            height:auto;
            padding: 0.5em 0.5em; 
            margin: 0.5em; 
        }


 #stop_clock   {
        
            float:left;
            font-family: verdana;
            font-size: 1.2em;
            padding: 0.5em 0.5em; 
            
        }

        #stop_touch   {
        
            float:left;
            font-family: verdana;
            font-size: 1.2em;
            padding: 0.5em 0.5em; 
            
        }