<div class=wrapper>
<header class="header">Header</header>
<article>
<div class="main">
<div class="child"></div>
</div>
</article>
<aside class="aside aside-1">1<aside>
<aside class="aside aside-2">2<aside>
<footer class="footer">Footer</footer>
</div>
body{
background: #fff;
color: #fff;
font-size: 250%;
text-align: center;
padding: 2em;
}
.wrapper * {
flex: 1 100%;
}
.header {
border-bottom: 3px solid white;
background: #2c3e50;
}
.footer {
border-top: 3px solid white;
background:#061539;
}
.child{
width: 100px;
height: 100px;
border-left: 2px solid white;
border-right: 2px solid white;
margin: auto;
background: #7887ab;
}
.main {
background: #2e4272;
}
.aside-1{
border-top: 3px solid white;
background: #162955;
}
.aside-2 {
border-top: 3px solid white;
background: #4f628e;
}
<div class="wrapper">
<div class="box header">Header</div>
<div class="box sidebar">Sidebar</div>
<div class="box content">Content
<br /></div>
<div class="box footer">Footer</div>
</div>
body {
margin: 40px;
}
.sidebar {
grid-area: sidebar;
}
.content {
grid-area: content;
}
.header {
grid-area: header;
}
.footer {
grid-area: footer;
}
.wrapper {
display: grid;
grid-gap: 10px;
grid-template-columns: 120px 120px 120px;
grid-template-areas:
"....... header header"
"sidebar content content"
"footer footer ......";
background-color: rgba(0,128,128,0.2);
border: 2px solid rgb(0,128,128);
border-radius: 5px;
color: #fff;
}
.box {
background-color: rgba(0,128,128,0.7);
color: #fff;
border-radius: 5px;
padding: 10px;
font-size: 150%;
}
.header,
.footer {
background-color: rgb(0,128,128);
}