body{
    margin:0;
    font-family: Arial;
}

.container{
    width:100%;
}

header{
    background:#FCC;
    text-align:center;
    padding:20px;
}

.box{
    width:33.33%;
    float:left;
    padding:15px;
    box-sizing:border-box;
}

.box h3{
    margin-top:0;
}

.box img{
    width:100%;
    height:400px;
    object-fit:cover;
}

footer{
    clear:both;
    background:#FCC;
    text-align:center;
    padding:15px;
}