header{display:none}.container-colunas{display:flex;gap:20px;width:100%;max-width:1200px;margin:0 auto;padding:20px}.coluna{padding:15px}.coluna-um-quarto{flex-basis:25%}.coluna-tres-quartos{flex-basis:75%}.imagem-coluna{max-width:100%;height:auto;display:block;border-radius:8px}