.widget-card {
    width: 300px; /* larghezza card */
    padding: 30px; /* spazio interno */
    margin: 20px auto; /* centrata orizzontalmente */
    border-radius: 12px; /* angoli arrotondati */
    box-shadow: 0 8px 20px rgba(0,0,0,0.25); /* ombra */
    background: #1e88e5; /* colore principale */
    color: white; /* testo bianco */
    text-align: center; /* centrato */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.energy-widget .widget-unit {
    text-align: center;
}