:root {
    --azul-rey: #0a1f44;
    --dorado: #d4af37;
    --blanco: #ffffff;
}

body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #0a1f44, #142d63);
    color: var(--blanco);
}

/* Contenedor principal */
.container {
    width: 95%;
    max-width: 1200px;
    margin: auto;
    padding: 20px;
}

/* Botones */
.btn {
    background: linear-gradient(45deg, var(--dorado), #f5d76e);
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    color: var(--azul-rey);
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

.btn:hover {
    transform: scale(1.05);
}

/* Cartón */
.carton {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 5px;
    margin-top: 20px;
}

.casilla {
    background: white;
    color: var(--azul-rey);
    padding: 15px;
    text-align: center;
    border-radius: 6px;
    font-weight: bold;
}

/* Responsivo */
@media(max-width: 768px){
    .carton {
        grid-template-columns: repeat(5, 1fr);
    }

    .casilla {
        padding: 10px;
        font-size: 14px;
    }
}