body {
    margin: 0;
    display: grid;
    gap: 20px;
    
    background: #444;
    color: #ddd;
}

body > *:not(header),
body > header > * {
    padding-left: 10%;
    padding-right: 10%;
}

body > header {
    color: #333
}
body > header > section#header {
    display: grid;
    grid-template-rows: 1fr 3fr;
    grid-template-columns: 3fr 1fr;
    
    padding-top: 10px;
    
    background: #bbb;
}
body > header > nav#about-us {
    padding-top: 10px;
    padding-bottom: 10px;
    
    background: #888;
    direction: rtl;
}

body > div#content {
    display: grid;
    grid-template-columns: 1fr 4fr;
}

body > main {
    display: grid;
    grid-template-columns: 1fr 5fr;
}
body > main > aside {
    align-content: center;
    text-align: center;
}

body > footer {
    width: 100%;
    box-sizing: border-box;
    
    margin-top: 5vh;
}