.ws40-frontend-chart {
  margin: 1.5em 0;
  padding: 20px 22px 18px;
  border: 1px solid #e5e7eb;
  border-radius: 18px;
  background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.05);
}

.ws40-frontend-chart__header {
  display: block;
  margin-bottom: 14px;
}

.ws40-frontend-chart__title {
  margin: 0;
  color: #17202a;
  font-size: 1.8rem;
  line-height: 1.2;
  font-weight: 700;
}

.ws40-frontend-chart__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}
.ws40-fchip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid rgba(15, 23, 42, 0.12);
  border-radius: 999px;
  background: #f3f5f7;
  font-size: 13px;
  line-height: 1.3;
}
.ws40-fchip__k { color: #5f6b7a; font-weight: 600; }
.ws40-fchip__v { color: #1d2327; }

.ws40-frontend-chart__canvas {
  position: relative;
  width: 100%;
  height: 420px;
  /* height esplicita necessaria per Chart.js responsive */
}

.ws40-frontend-chart__canvas canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.ws40-frontend-chart__status {
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 10px;
  background: #f6f7f7;
  color: #1d2327;
  font-size: 14px;
}

.ws40-frontend-chart__status--error {
  background: #fff1f1;
  color: #8a1f1f;
}

.ws40-frontend-chart__status--warning {
  background: #fff8e6;
  color: #7a5600;
}

@media (max-width: 782px) {
  .ws40-frontend-chart {
    padding: 16px;
    border-radius: 14px;
  }

  .ws40-frontend-chart__title {
    font-size: 1.45rem;
  }

  .ws40-frontend-chart__canvas {
    height: 300px;
  }
}

/* DT-CH01: per-series "not applicable / no data" notice */
.ws40-frontend-chart__warn{background:#f0f6fc;border:1px solid #c5d9f0;border-left:4px solid #2271b1;border-radius:4px;padding:8px 12px;margin-top:8px;font-size:12px;line-height:1.5;color:#1a4a7a;}