/* Chart legend pill */
.chart-legend-pill {
    position: absolute;
    left: 20px;
    top: 12px;
    padding: 6px 10px;
    border-radius: 14px;
    font-size: 0.88rem;
    box-shadow: 0 2px 6px rgba(0,0,0,0.18);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.06);
    color: var(--mud-palette-text-primary);
}
.chart-legend-swatch {
    display:inline-block;width:12px;height:12px;border-radius:6px;margin-right:6px;vertical-align:middle;border:2px solid rgba(255,255,255,0.08);
}

/* make chart canvas container relative for pill positioning */
.chart-card { position: relative; }

.chart-loading-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.02);
    z-index: 20;
}
.chart-spinner {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 4px solid rgba(0,0,0,0.08);
    border-top-color: var(--mud-palette-primary);
    animation: chart-spin 1s linear infinite;
}
@keyframes chart-spin { to { transform: rotate(360deg); } }