* {
    margin: 0px;
    padding: 0px;
}

body {
    background: lightgray;
    font-family: Arial, Helvetica, sans-serif;
}

#container {
    width: 70%;
    border: 1px solid black;
    margin: auto;
}

header {
    background: red;
    height: 100px;
    width: 100%;
    margin: 0px;
    text-align: center;
    line-height: 100px;
    color: white;
    border-bottom: 3px dashed black;

}


nav {
    background: lightblue;
    height: 50px;
    border-bottom: 1px solid black;

}

nav ul li{
    float: left;
    list-style: none;
    margin: 10px;
    line-height: 30px;

}

.clearfix {
    clear: both;

}

#content{
    width: 73%;
    float: left;
    width: calc(73% - 20px);
    background: green;
    min-height: 500px;
    padding: 10px;

}

.article{
    color: white;
    margin-top: 15px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}
.article:first-child{
    border-top: 1px solid #eee;
    padding-top: 10px;
}

.article h2{
font-size: 1.5em;
}

aside{
    float: left;
    width: calc(27% - 20px);
    background: orange;
    min-height: 500px;
    padding: 10px;
}
.entraTexto{
    width: 90%;
}

footer{
    background: black;
    color: white;
    text-align: center;
    height: 50px;
    line-height: 50px;
}