style.css

body{
    background: whitesmoke;
    margin: 0;
}
div{
    -box-sizing:border-box;
}
header{
    background: white;
    padding: 10px;
    text-align: center;
}
header h1{
    margin: 0;
    font-family: sans-serif;
}
div.post{
    background: white;
    margin-top: 50px;
    border-radius: 5%;
}
div.post img{
width: 100%;
}
div.post .post-header div:first-child{
    display: inline-block;
    width: 76%;
    padding: 0px;
}
div.post .post-header div:last-child{
    display: inline-block;
    width: 20%;
    text-align: right;
    padding: 10px;
    color: gray;
}
div.post h2, div.post p{
    padding: 10px;
    margin: 0%;
    font-family: sans-serif;
}
div.container{
    width: 600px;
    margin: auto;
}