/* ============================================
   ANALYTICS CHARTS COMPONENT
   Analytics dashboard charts and statistics
   ============================================ */

/* Analytics Container */
.analytics-container {
    padding: var(--space-4);
    max-width: 1400px;
    margin: 0 auto;
}

.analytics-header {
    margin-bottom: var(--space-6);
}

.analytics-header h1 {
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-1);
}

.analytics-header p {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

/* Stats Grid */
.analytics-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
    .analytics-stats {
        grid-template-columns: repeat(4, 1fr);
    }
}

.analytics-stat {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    text-align: center;
    transition: all var(--duration-fast);
}

.analytics-stat:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.analytics-stat__value {
    font-size: 36px;
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--space-1);
}

.analytics-stat__label {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.analytics-stat--danger .analytics-stat__value {
    color: var(--color-danger);
}

.analytics-stat--warning .analytics-stat__value {
    color: var(--color-warning);
}

.analytics-stat--success .analytics-stat__value {
    color: var(--color-success);
}

/* Charts Grid */
.analytics-charts {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
}

@media (min-width: 768px) {
    .analytics-charts {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1200px) {
    .analytics-charts {
        grid-template-columns: repeat(4, 1fr);
    }
}

.analytics-chart {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
}

.analytics-chart h3 {
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--color-text);
}

.analytics-chart__empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 200px;
    color: var(--color-text-muted);
    text-align: center;
}

.analytics-chart__empty-icon {
    font-size: 48px;
    margin-bottom: var(--space-2);
    opacity: 0.5;
}

/* Confidence Distribution Chart */
.confidence-chart {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.confidence-bar {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    transition: background var(--duration-fast);
}

.confidence-bar:hover {
    background: var(--color-bg-hover);
}

.confidence-bar__label {
    width: 24px;
    font-size: 10px;
    font-weight: 700;
    text-align: center;
    border-radius: var(--radius-sm);
    padding: 2px;
    flex-shrink: 0;
}

.confidence-bar--vh .confidence-bar__label { 
    background: #dc2626; 
    color: white; 
}

.confidence-bar--h .confidence-bar__label { 
    background: #f59e0b; 
    color: black; 
}

.confidence-bar--m .confidence-bar__label { 
    background: #eab308; 
    color: black; 
}

.confidence-bar--l .confidence-bar__label { 
    background: #22c55e; 
    color: white; 
}

.confidence-bar__track {
    flex: 1;
    height: 8px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.confidence-bar__fill {
    height: 100%;
    transition: width var(--duration-normal);
}

.confidence-bar--vh .confidence-bar__fill { 
    background: linear-gradient(90deg, #dc2626, #ef4444); 
}

.confidence-bar--h .confidence-bar__fill { 
    background: linear-gradient(90deg, #f59e0b, #fbbf24); 
}

.confidence-bar--m .confidence-bar__fill { 
    background: linear-gradient(90deg, #eab308, #facc15); 
}

.confidence-bar--l .confidence-bar__fill { 
    background: linear-gradient(90deg, #22c55e, #4ade80); 
}

.confidence-bar__count {
    min-width: 40px;
    font-size: var(--text-sm);
    font-weight: 700;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.confidence-bar__desc {
    font-size: 10px;
    color: var(--color-text-muted);
    text-align: right;
    display: none;
}

@media (min-width: 768px) {
    .confidence-bar__desc {
        display: block;
    }
}

/* Confidence Bar Icon (Accessibility: Color + Icon, not just color) */
.confidence-bar__icon {
    margin-right: var(--space-2);
    font-size: 1.2em;
    flex-shrink: 0;
}

/* Pattern alternatives for high contrast mode */
.confidence-bar--very-high .confidence-bar__fill {
    background-image: repeating-linear-gradient(
        45deg,
        rgba(255,255,255,0.1) 0px,
        rgba(255,255,255,0.1) 4px,
        transparent 4px,
        transparent 8px
    );
}

.confidence-bar--high .confidence-bar__fill {
    background-image: repeating-linear-gradient(
        0deg,
        rgba(255,255,255,0.1) 0px,
        rgba(255,255,255,0.1) 4px,
        transparent 4px,
        transparent 8px
    );
}

.confidence-bar--medium .confidence-bar__fill {
    background-image: repeating-linear-gradient(
        90deg,
        rgba(255,255,255,0.1) 0px,
        rgba(255,255,255,0.1) 4px,
        transparent 4px,
        transparent 8px
    );
}

.confidence-bar--low .confidence-bar__fill {
    background-image: repeating-linear-gradient(
        -45deg,
        rgba(255,255,255,0.1) 0px,
        rgba(255,255,255,0.1) 4px,
        transparent 4px,
        transparent 8px
    );
}

/* High contrast mode adjustments */
@media (prefers-contrast: high) {
    .confidence-bar--very-high .confidence-bar__fill,
    .confidence-bar--high .confidence-bar__fill,
    .confidence-bar--medium .confidence-bar__fill,
    .confidence-bar--low .confidence-bar__fill {
        background-image: none;
        border: 2px solid currentColor;
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .confidence-bar:hover {
        transition: none;
    }
}

/* Bar Chart */
.bar-chart {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.bar-chart__item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.bar-chart__label {
    width: 80px;
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    flex-shrink: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.bar-chart__track {
    flex: 1;
    height: 20px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.bar-chart__fill {
    height: 100%;
    background: var(--color-accent);
    border-radius: var(--radius-sm);
    transition: width var(--duration-normal);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: var(--space-2);
    min-width: 30px;
}

.bar-chart__fill-text {
    font-size: 10px;
    font-weight: 600;
    color: white;
}

.bar-chart__value {
    width: 40px;
    font-size: var(--text-xs);
    font-weight: 600;
    text-align: right;
    flex-shrink: 0;
}