/* AB Charts - Canonical light style */

:root {
    --chart-bg: #ffffff;
    --chart-surface: #ffffff;

    --axis: #9ca3af;
    --axis-label: #6b7280;

    --grid: #e5e7eb;

    --text: #111827;
    --muted: #6b7280;

    --line-control: #9ca3af;   /* светло-серый */
    --line-test: #111827;      /* почти чёрный */
    --line-secondary: #374151; /* для 2-й метрики */

    --dash: 4 4;

    --band-fill: rgba(17, 24, 39, 0.04); /* мягкое серое окно */
    --band-stroke: rgba(17, 24, 39, 0.10);

    --tooltip-bg: rgba(255, 255, 255, 0.92);
    --tooltip-border: #e5e7eb;
    --tooltip-text: #111827;
}

/* Chart container */
.chart-block {
    margin: 3rem 0;
    background: var(--chart-bg);
    padding: 1.5rem;
    border-radius: 4px;
}

.chart {
    width: 100%;
    height: 420px;
    background: var(--chart-bg);
}

.chart svg {
    display: block;
    width: 100%;
    height: 100%;
    background: var(--chart-bg);
}

/* Toolbar */
.chart-toolbar {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--grid);
}

.chart-toolbar button {
    padding: 0.5rem 1rem;
    background: var(--chart-bg);
    border: 1px solid var(--grid);
    border-radius: 4px;
    font-size: 0.85rem;
    color: var(--muted);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
}

.chart-toolbar button:hover {
    border-color: var(--axis);
    color: var(--text);
}

.chart-toolbar button.active {
    background: var(--text);
    color: var(--chart-bg);
    border-color: var(--text);
}

/* Tabs */
.chart-tabs-nav {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--grid);
}

.chart-tabs-nav button {
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 0.9rem;
    color: var(--muted);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
}

.chart-tabs-nav button:hover {
    color: var(--text);
}

.chart-tabs-nav button.active {
    color: var(--text);
    border-bottom-color: var(--text);
    font-weight: 500;
}

.chart-tab-content {
    display: none;
}

.chart-tab-content.active {
    display: block;
}

/* Chart elements - Axes */
.ab-chart .ab-axis path,
.ab-chart .ab-axis line {
    stroke: var(--axis);
    stroke-width: 1;
    fill: none;
}

.ab-chart .ab-axis path.domain {
    display: none; /* скрываем основную линию оси */
}

.ab-chart .ab-axis .tick line {
    stroke: var(--axis);
    stroke-width: 1;
    opacity: 0.5;
}

.ab-chart .ab-axis .tick text {
    fill: var(--axis-label);
    font-size: 12px;
    font-weight: 400;
}

/* Grid */
.ab-chart .ab-grid line {
    stroke: var(--grid);
    stroke-width: 1;
    stroke-dasharray: var(--dash);
    opacity: 0.6;
    pointer-events: none;
}

/* Lines */
.ab-chart .ab-line {
    fill: none;
    stroke-width: 2;
    vector-effect: non-scaling-stroke;
}

.ab-chart .ab-line.ab-control {
    stroke: var(--line-control);
    stroke-dasharray: var(--dash);
    opacity: 0.8;
}

.ab-chart .ab-line.ab-test {
    stroke: var(--line-test);
    stroke-dasharray: none;
}

.ab-chart .ab-line.ab-secondary {
    stroke: var(--line-secondary);
    stroke-dasharray: none;
}

/* Labels (series names on the right) */
.ab-chart .ab-label {
    font-size: 12px;
    font-weight: 400;
    fill: var(--muted);
    pointer-events: none;
}

.ab-chart .ab-label.ab-label-control {
    fill: var(--line-control);
}

.ab-chart .ab-label.ab-label-test {
    fill: var(--line-test);
}

.ab-chart .ab-label.ab-label-secondary {
    fill: var(--line-secondary);
}

/* Bands (shaded areas) */
.ab-chart .ab-band {
    fill: var(--band-fill);
    stroke: var(--band-stroke);
    stroke-width: 1;
    stroke-dasharray: var(--dash);
    pointer-events: none;
}

/* Vertical lines (annotations) */
.ab-chart .ab-vline {
    stroke: var(--axis);
    stroke-width: 1;
    stroke-dasharray: var(--dash);
    opacity: 0.6;
    pointer-events: none;
}

/* Axis labels */
.ab-chart .ab-axis-label {
    fill: var(--axis-label);
    font-size: 12px;
    font-weight: 400;
}

/* Tooltip */
.ab-tooltip {
    position: absolute;
    padding: 8px 12px;
    background: var(--tooltip-bg);
    border: 1px solid var(--tooltip-border);
    border-radius: 4px;
    font-size: 12px;
    color: var(--tooltip-text);
    pointer-events: none;
    z-index: 1000;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
    .chart {
        height: 320px;
    }
    
    .chart-block {
        padding: 1rem;
        margin: 2rem 0;
    }
    
    .ab-chart .ab-axis .tick text,
    .ab-chart .ab-label {
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    .chart {
        height: 280px;
    }
    
    .chart-toolbar button,
    .chart-tabs-nav button {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }
}

/* Multi-chart layouts */
.charts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin: 3rem 0;
}

@media (min-width: 800px) {
    .charts-grid.two-columns {
        grid-template-columns: 1fr 1fr;
    }
}

/* Chart panel titles */
.chart-panel-title {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
    color: var(--text);
    margin-top: 2rem;
}

.chart-panel-title:first-child {
    margin-top: 0;
}