body{font-family:arial;background:#f5f5f5;margin:0}
header{background:#fff;padding:15px;display:flex;justify-content:space-between}
nav a{margin:0 10px;text-decoration:none}
.container{display:flex;width:90%;margin:auto}
.posts{width:70%}
.post{background:#fff;margin:15px;padding:15px}
.post img{width:100%}
.sidebar{width:30%;background:#fff;padding:15px;margin:15px}
footer{text-align:center;padding:10px;background:#222;color:#fff}