* {
    margin: 0px;
    padding: 0px;
}    
body {
    background-color: #EAE5D5; 
    width: 1040px;
    margin:auto;

}

header {
    padding: 50px;
    margin-top:auto;
    background-color: #92C2BD;
}

nav ul li {
    list-style: none;
    margin-top: 20px;
    display: inline-block;
    background-color:;

}

nav ul li a {
    text-decoration: none;
    margin-left: 0px;
    margin-right: 30px; 
    color: white;
}

#info2 {
    margin-top: -5px;
    float: right;
}

#alumnas {
    display: block;
    margin: auto;
    padding-left: 0px;
    float: right;
}

#principal {
    display: block;
    float: left;
}

main {
    margin-top: 20px;
    float: left;
    width:  605px;
    height: auto;
    display: block;
    padding-left: 20px;
    padding-right: 20px;
    padding-top: 15px;
    background-color: #938C7E;
    font-size: 14px;
}

aside {
    float: right;
    width: 350px;
    font-size: 14px;
    background-color: #FEB03E;
    display: block;
    padding-left: 20px;
    padding-top: 15px;
    padding-bottom: 15px;
    margin-top: 20px;
}

footer {
    margin-top: 450px;
    padding-left: 5px;
    padding-right: 5px;
    padding-top: 5px;
    padding-bottom: 5px;
    font-size: 12px;
    text-align: center;
    background-color: #92C2BD;
    clear:both;
    }

contenedor {
    clear:both;
}