{
    margin: 0;
    padding: 0;
}

/* Render los elementos HTML5 como un bloque */
header, footer, aside, nav, article {
    display: block;
}

body {
    margin: 0 auto;
    width: 940px;
    font: 13px/22px Helvetica, Arial, sans-serif;
    background: #f5f5f1;
}

h1 {
    font-size: 28px;
    line-height: 30px;
    padding: 10px 0;
}

h2 {
    font-size: 23px;
    line-height: 25px;
    padding: 10px 0;
}

h3 {
    font-size: 18px;
    line-height: 20px;
    padding: 11px 0;
}

p {
    padding-bottom: 22px;
}

nav {
    position: absolute;
    left: 0;
    width: 100%;
    background: url("nav_background.png");
}

nav ul {
    margin: 0 auto;
    width: 960px;
    list-style: none;
}

nav ul li {
    float: left;
}

nav ul li a {
    display: block;
    margin-right: 20px;
    width: 140px;
    font-size: 14px;
    line-height: 44px;
    text-align: center;
    text-decoration: none;
    color: #777;
}

nav ul li a:hover {
    color: #fff;
}

nav ul li.selected a {
    color: #fff;
}

#intro {
    position: relative;
    margin-top: 66px;
    padding: 44px;
    background: #467612 url("intro_background.png") repeat-x;
    border-radius: 170px 50px;
}

#intro img {
    position: absolute;
    top: 0;
    right: 0;
    width: 470px;
    height: 100%;
    border-radius: 170px 50px;
}

#intro h2{
    position: relative;
    z-index: 9999;
    width: 600px;
    padding: 0 0 0 0;
    font-weight: bold;
}

#intro p{
    position: absolute;
    top: 0;
    right: 0;
    padding: 3% 0 0 0;
    width: 400px;
    z-index: 9999;
}

#contenido {
    display: block;
}

#contenidoPrincipal {
    display: table-cell;
    width: 620px;
    padding-right: 22px;
}

aside {
    display: table-cell;
    width: 300px;
}

.blogPost div {
    column-count: 2;
    column-gap: 22px;
    -moz-column-count: 2;   /* Firefox */
    -moz-column-gap: 22px;
    -webkit-column-count: 2; /* Safari & Chrome */
    -webkit-column-gap: 22px;
}

.blogPost img {   
    margin: 22px 0;   
    box-shadow: 3px 3px 7px #777;
    width: 100%;   
}

#comentarios {
    margin-top: 21px;
    padding-top: 22px;
    border-top: 1px solid #d7d7d7;
}

#comentarios article {
        display: table;
        padding: 22px;
    }

section#comentarios article:nth-child(2n+1) {
    padding: 21px;
    background: #E3E3E3;
    border: 1px solid #d7d7d7;
    border-radius: 11px;
}

#comentarios article header {
    display: table-cell;
    width: 220px;
    padding-right: 22px;
}

#comentarios article header a {
    display: block;
    font-weight: bold;
    color: #000;
}

#comentarios article header a:hover {
    text-decoration: none;
}

#comentarios article p {
    padding: 0;
}

form {
    margin-top: 21px;
    padding-top: 22px;
    border-top: 1px solid #d7d7d7;
}

form p {
    display: table;
    margin-bottom: 22px;
    padding: 0 22px;
}

form label {
    display: table-cell;
    width: 140px;
    padding-right: 20px;
    text-align: right;
    font-weight: bold;
    vertical-align: top;
}

form input[type="text"], form input[type="email"], form input[type="url"] {
    display: table-cell;
    width: 300px;
    height: 20px;
    border: 1px solid #d7d7d7;
}

form textarea {
    width: 300px;
    height: 100px;
    border: 1px solid #d7d7d7;
}

form input[type="submit"] {
    margin-left: 162px;
}