* { margin: 0; padding: 0; box-sizing: border-box; font-family: Arial, sans-serif; }

body {
    background: #2563eb ;
    color: #f44336;
    line-height: 1.6;
}

.contenedor-flex2 {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    gap: 10px;
    padding: 10px;
}

.cabecera, .pie {
    background: #bceb25;
    color: #000000;
    padding: 20px;
    border-radius: 6px;
    text-align: center;
}

.cuerpo {
    display: flex;
    flex: 1;
    gap: 10px;
}

.menu-lateral {
    background: #bceb25;
    color: #000000;
    padding: 20px;
    flex: 0 0 200px;
    border-radius: 6px;
}

.articulos {
    flex: 1;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.articulos article {
    flex: 1 1 30%;
    background: #bceb25;
    color: #000000;
    padding: 20px;
    border-radius: 6px;
    text-align: center;
}

@media (max-width: 768px) {
    .cuerpo { flex-direction: column; }
    .menu-lateral { flex: 1 1 auto; }
    .articulos article { flex: 1 1 100%; }
}