<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="css/grid.css"/>
</head>
<body>
<div id="contenedor">
<div id="primero" class="elemento">1</div>
<div id="side" class="elemento">2</div>
<div id="content" class="elemento">3</div>
<div id="footer" class="elemento">4</div>
<!--
<div class="elemento">5</div>
<div class="elemento">6</div>
<div class="elemento">7</div>
<div class="elemento">8</div>
<div class="elemento">9</div>
<div class="elemento">10</div>
-->
</div>
</body>
</html>
.elemento{
border: solid 2px gray;
padding: 1em;
background-color: aquamarine;
}
#contenedor{
display: grid;
grid-template-columns: 150px 2fr 1fr; /* unidades relativas al espacio libre */
grid-template-rows: 1fr repeat(2,2fr);
grid-template-areas: 'header header header header'
'side content content content'
'side content content content'
'side content content content'
'footer footer footer footer'
;
}
#primero{
grid-area: header;
}
#side{
grid-area: side;
}
#content{
grid-area: content;
}
#footer{
grid-area: footer;
}