#contenedor {
	background-color: rgb(255, 255, 255);
	max-width: 960px;
	margin: auto;
}
    
#logo {
	background-color: rgb(255, 255, 255);
	height: 50px;
	width: 200px;
    float: left; 
    padding-top: 20px;
	padding-right: 0px;
	padding-bottom: 20px;
	padding-left: 20px;
    margin: auto;
    
}
#arriba {
	background-color: rgb(255, 255, 255);
	height: 50px;
	width: 640px;
    padding-top:20px;
	padding-right: 20px;
	padding-bottom: 20px;
    font-family: "Trebuchet Ms";"san-serif";
    font-size: 0.7em;
    margin: auto;

}

 main {
    display:block;       
	background-color: rgb(255, 255, 255);
	margin-top: 30px;
	margin-right: 30px;
	margin-bottom: 30px;
	margin-left: 0px;
    margin: auto;
    float: left;
    max-width: 40%;
    padding-left: 3%;
    padding-right: 1%;
    }

aside{
float:right;
max-width: 40%
}

#menu {
background-color: rgb(255, 255, 255);
float: left; 
padding-top:20px;
padding-right: 20px;
padding-bottom: 20px;
padding-left: 60px;
font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
list-style-type: none;
    display: block;
text-decoration: none;
    font-weight: bold;
    text-align: center

}

a {   
 text-decoration:none;   
position: relative;
}   

#alumnos {
background-color: rgb(255, 255, 255);
	width: 740px;
    float: left; 
    padding-top:20px;
	padding-right: 20px;
	padding-bottom: 20px;
	padding-left: 60px;
    text-align: left;
 font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
list-style-type: none;
    display: block;
text-decoration: none;
 


}

li a {
	font-weight: bold;
	color: #000;
	background-color: #fff;
	text-decoration: none;
	text-align: center;
	display: block;
	padding-top: 10px;
	padding-bottom: 10px;
	font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
	float: left;
    margin-left: 3%;
	list-style-type: none;
}
li a:hover {
	color: #fff;
	background-color: #6d6d6d;
}


footer {
background-color: rgb(204, 204, 204);
padding-top:5px;
padding-right: 30px;
padding-bottom: 5px;
padding-left: 30px;
overflow: hidden;
display: block;  
margin-top: 60%;
    
}

p 
{
font-family: "Helvetica";"san-serif"; 


}

h1
{
font-family: "Trebuchet MS";
font-size: 1.3em;
}

h2
{
font-family: "Trebuchet MS";
    font: 90% bold monospace; 
}