*{
    margin: 0;
    padding: 0;
}

h1 {
    font-size: 20px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-weight: bold;

}

h2 { font-size: 14px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-weight: lighter;
}

header, nav, section, aside, article, footer, hgroup {
     display: block; 

}
body{
    text-align: center;
    
}

.agrupar{
    border: 1px solid black;
    width: 960px;
    margin: 25px auto;
}

.header{
    background: #FFFBB9;
    border: 1px solid #999999;
    padding: 18px;
}

.header h1{
    text-align: left;
}

.menu{
    background: #CCC;
    border: 1px solid #999999;
    padding: 5px 18px;
    text-align: left;
}

.menu li{
    list-style: none;
    padding: 10px;
    font: bold 12px verdana;
    display:inline-block;    
}

.seccion {
    margin: 20px;
    width: 59%;
    float: left;
}

article{
    background: #fffbcc;
    border: 1px solid black;
    padding: 20px;
    margin-bottom: 15px;
}

article hgroup{
    text-align: left;
}
 time{
     color: gray;
 }

article footer{
    text-align: right;
}

.mensajes{
    width: 34%;
    margin: 20px 0px;
    float: left;   
}

.mensajes blockquote{
    border: 1px solid black; 
    margin-bottom: 15px;
    padding: 40px;
    background: dimgrey;

}
.pie{
    clear:both;
    padding: 20px;
    background: darkslategrey;
    color: #ffffff;
    font-family: sans-serif;
}

img {
    display:block;
    margin: 15px auto;
}