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

.grid-layout2 {
    display: grid;
    grid-template-areas:
        "cabecera cabecera"
        "menu     main"
        "pie      pie";
    grid-template-columns: 220px 1fr;
    grid-template-rows: auto 1fr auto;
    gap: 10px;
    min-height: 100vh;
    padding: 10px;
}

.cabecera { grid-area: cabecera; background: #1e3a8a; color:#fff; padding:20px; border-radius:6px; text-align:center;}
.menu-lateral { grid-area: menu; background: #7c3aed; color:#fff; padding:20px; border-radius:6px;}
.main {
    grid-area: main;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 10px;
}
.tarjeta {
    background: #0f766e;
    color: #fff;
    padding: 30px;
    border-radius: 6px;
    text-align: center;
}
.pie { grid-area: pie; background: #334155; color:#fff; padding:20px; border-radius:6px; text-align:center;}

@media (max-width: 768px) {
    .grid-layout2 {
        grid-template-areas:
            "cabecera"
            "menu"
            "main"
            "pie";
        grid-template-columns: 1fr;
    }
}