#menu {
position:fixed;
width:20%;
height:100%;
background:#FF4000;
top:0px;
left:0px;

}



#principal{
position:fixed;
width:80%;
height:100%;
background:white;
top:0px;
right:0px;
}

#cuerpo{
position:fixed;
width:40%;
height:60%;
background:white;
top:20%;
left:40%;

}

hr {
  background-color: white;
  height: 2px;
  width: 30%;
}

#linea {
  background-color: white;
  height: 1;
  width: 70%;
}

#linea_g {
  background-color: gray;
  height: 1;
  width: 40%;
}


h1{
  color:white;
  font-size: 48px;
font-family: 'Roboto', sans-serif;
font-weight: 300; 
}
h2 {
color:white;
font-size: 24px;
font-family: 'Roboto', sans-serif;
font-weight: 300; 
}

h3 {
color:gray;
font-size: 18px;
font-family: 'Roboto', sans-serif;
font-weight: 100; 
}


h4 {
color:gray;
font-size: 16px;
font-family: 'Roboto', sans-serif;
font-weight: 100; 
}