body {
    font-family: Arial, Helvetica, sans-serif;
    color: #777;
    background-color: #777;
    width: 960px;
    font-size: 18px;
}
    
header {
    background: #ebebeb;
    text-align: center;
    padding: 30px;
    margin: 10px;
}
nav {
    background: #ebebeb;
    text-align: center;
    padding: 30px;
    margin: 10px;
}
section { 
    background: #ebebeb;
    width: 495px;
    text-align: center;
    padding: 20px;
    margin: 10px;
}
aside {
    background: #ebebeb;
    text-align: center;
    width: 495px;
    padding: 30px;
    margin: 10px;
}
article {
    color: #ebebeb;
    background: #777;
    padding: 20px;
}
h1,h2,h3,p {
color:#777;
background: #ebebeb;
width: 400px;
}
footer {
    background: #ebebeb;
    text-align: center;
    padding: 30px;
    margin: 10px;
}
.ss {
    display: flex;
    flex-direction: row;
}
.sss {
    display: flex;
    flex-direction: column;
    padding: 20px;
}