body{margin:0;font-family:Roboto,Helvetica,Arial,sans-serif}.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.post-card{width:100%;max-width:100%}@media (min-width: 600px){.card-grid{grid-template-columns:repeat(3,1fr);gap:16px}}@media (min-width: 900px){.card-grid{grid-template-columns:repeat(4,1fr)}}