body { 
  margin: 0; 
  font-family: sans-serif; 
} 
 
.letrageneral { 
   font-size: 22px; 
} 
.letranegrita{ 
 font-size: 22px; 
 font-weight: bold;  
} 
.letragrande{ 
 font-size: 24px;   
} 
.letraerror{ 
  font-size: 22px; 
  color: red; 
 } 
div { 
  overflow: hidden; 
  position: absolute; 
  margin: 0; 
  padding: 0; 
} 
 
#principal { 
 left: 0px; 
 top: 0px; 
 
 width: 1280px; 
 height: 720px; 
  
} 
.cabecera { 
 font-weight: bold; 
 left: 500px;  
 top: 100px; 
 color: #006400; 
 font-size: small; 
 left: 235px;  
 top: 110px;  
} 
 
 
 
.etiquetas_campos {      
 font-size: 70%;  
 font-weight: bold;  
 color:#2D6F53;  
} 
 
 
#txtform { 
 left: 300px; 
 top: 250px; 
} 
 

 
#formulario { 
 left: 600px; 
 top: 300px; 
} 
 
img { 
  border: 0; 
  margin: 0; 
  padding: 0; 
} 
 
ul.menu { 
  padding: 0; 
  margin: 0; 
  position: absolute; 
  width: 320px; 
 
} 
.menu li { 
  display: none; 
  overflow: hidden; 
  width: 320px; 
  height: 33px; 
  text-align: center; 
  padding-left: 11px; 
  padding-top: 5px; 
  font: 18px sans-serif; 
  color: black; 
  background-color: white; 
  border: solid thin #006400; 
} 
 
.menu .lisel { 
 font-weight: bold; 
  color: #006400; 
  background-color: #e5dcd6; 
 
}