body { font-family: Arial, sans-serif; margin:0; background:#f4f6f8; color:#222; }
header { background:#1f2933; color:#fff; padding:20px; }
nav a { color:#9fd3ff; margin-right:15px; text-decoration:none; }
main { padding:20px; max-width:900px; margin:auto; background:#fff; }
footer { background:#111; color:#ccc; text-align:center; padding:10px; }
ul.posts li { margin-bottom:10px; }