/* =========================
   CARD GENERICHE
========================= */
.card {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.08);
    padding: 20px;
    cursor: default;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 15px rgba(0,0,0,0.15);
}

/* Card nascosta (serie disabilitata nel grafico) */
.card-hidden {
    opacity: 0.4;
    filter: grayscale(70%);
}

.card-hidden:hover {
    opacity: 0.6;
}