/* =============================================================================
   Terminal main chart frame
   ========================================================================== */

/* The floor must stay well under the shortest realistic viewport. The frame
   lives in a column that is `calc(100vh - 44px - 24px)` tall with
   `overflow:hidden`, so any floor the flexbox cannot shrink past pushes the
   bottom of the chart out of the clip box — and the bottom of a Lightweight
   Chart is the time axis. A 720px floor did exactly that below ~830px of
   viewport: the dates vanished and the last pane was cut mid-histogram. */
#chart-frame {
    width: 100%;
    flex: 1 1 0;
    min-height: 320px;
    position: relative;
    min-width: 0;
    /* Flex column so #financial-chart gets a definite used height without
       relying on percentage resolution against a flex item (which collapses
       to 0×0 in some Chromium layouts and leaves a black void). */
    display: flex;
    flex-direction: column;
}

#financial-chart {
    flex: 1 1 0;
    width: 100% !important;
    min-width: 0 !important;
    min-height: 0 !important;
    height: auto !important;
    position: relative;   /* anchors the floating OHLC legend */
}

/* Loading overlay is position:absolute (see .sfa-chart-loading) — do not
   stretch #chart-frame descendants with height:100%. That rule used to target
   a Loading wrapper around the canvas; it now also hit Lightweight Charts'
   internal wrappers and the floating legend (grey veil). Legend sizes itself;
   the canvas sizes via the flex rule on #financial-chart above. */

/* Keep the spinner centered over the chart/panel without stealing layout
   height, and tint it with the loading colour we pass from Python. */
._dash-loading-callback,
.dash-spinner-container {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Spinner overlay for the chart. Absolute + click-through so it floats over
   the canvas without joining the flex layout or swallowing drags. */
.sfa-chart-loading {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    z-index: 4;
}

/* ---- Floating OHLC + indicator readout.
   Parks top-left when idle; .sfa-chart-legend--follow is positioned from the
   crosshair by 10-sfa-chart.js. pointer-events:none so it never eats a drag.
   Sized to content (narrow column) so it doesn't veil the price pane. */
.sfa-chart-legend {
    position: absolute;
    top: 8px;
    left: 12px;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    width: max-content;
    max-width: min(168px, 38%);
    padding: 4px 6px;
    background: color-mix(in srgb, var(--bg-primary) 88%, transparent);
    border: 1px solid var(--border-primary);
    border-radius: 2px;
    box-shadow: 0 2px 10px color-mix(in srgb, #000 28%, transparent);
    font-size: 10px;
    line-height: 1.25;
    pointer-events: none;
    user-select: none;
}

.sfa-chart-legend:empty { display: none; }

.sfa-chart-legend-row {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 2px 6px;
}

.sfa-chart-legend-symbol {
    font-weight: 600;
    font-size: 10px;
    letter-spacing: 0.6px;
    text-transform: uppercase;
    color: var(--text-primary);
}

.sfa-chart-legend-interval {
    font-size: 9px;
    letter-spacing: 0.5px;
    padding: 0 3px;
    border: 1px solid var(--border-primary);
    border-radius: 2px;
    color: var(--text-secondary);
}

.sfa-chart-legend-cell {
    display: inline-flex;
    align-items: baseline;
    gap: 2px;
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum" 1;
}

.sfa-chart-legend-cell i {
    font-style: normal;
    font-size: 9px;
    color: var(--text-tertiary);
}

.sfa-chart-legend-cell b { font-weight: 600; font-size: 10px; }

.sfa-chart-legend-inds {
    display: flex;
    flex-direction: column;
    gap: 1px;
    padding-top: 3px;
    border-top: 1px solid var(--border-primary);
}

.sfa-chart-legend-ind {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 8px;
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum" 1;
}

.sfa-chart-legend-ind i {
    font-style: normal;
    font-size: 9px;
    letter-spacing: 0.2px;
    opacity: 0.9;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sfa-chart-legend-ind b {
    font-weight: 600;
    font-size: 10px;
    flex-shrink: 0;
}

/* ---- Chart toolbar controls ---- */
.sfa-chart-tools {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.sfa-chart-tools .bbg-button-ghost { padding: 2px 7px; }