/* Fitness Tracker PWA - Chart Styles */

/* Chart Containers */
.charts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.chart-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    min-height: 300px;
}

.chart-container h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.chart-container canvas {
    max-width: 100%;
    height: auto !important;
}

/* Chart Loading State */
.chart-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 250px;
    color: var(--text-tertiary);
}

/* Chart Empty State */
.chart-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 250px;
    color: var(--text-tertiary);
    text-align: center;
    padding: var(--spacing-lg);
}

.chart-empty-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.chart-empty-message {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.chart-empty-hint {
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
}

/* Individual Chart Sizes */
#weight-chart,
#waist-chart {
    max-height: 250px;
    margin-bottom: var(--spacing-lg);
}

#macro-distribution-chart {
    max-height: 300px;
}

#calorie-balance-chart,
#weight-trend-chart,
#workout-volume-chart {
    max-height: 300px;
}

/* Chart Legends */
.chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.chart-legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.chart-legend-color {
    width: 16px;
    height: 16px;
    border-radius: var(--radius-sm);
}

/* Chart Tooltips (enhanced by Chart.js) */
.chartjs-tooltip {
    background-color: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius-md) !important;
    color: var(--text-primary) !important;
    padding: var(--spacing-sm) !important;
    font-family: var(--font-family) !important;
    font-size: var(--font-size-sm) !important;
    box-shadow: 0 4px 12px var(--shadow-color) !important;
}

/* Chart Colors - Dark Mode Optimized */
.chart-color-protein {
    background-color: #3b82f6;
}

.chart-color-carbs {
    background-color: #10b981;
}

.chart-color-fat {
    background-color: #f59e0b;
}

.chart-color-fiber {
    background-color: #8b5cf6;
}

.chart-color-calories-in {
    background-color: #3b82f6;
}

.chart-color-calories-out {
    background-color: #ef4444;
}

.chart-color-weight {
    background-color: #06b6d4;
}

.chart-color-waist {
    background-color: #ec4899;
}

/* Responsive Chart Adjustments */
@media (max-width: 768px) {
    .chart-container {
        padding: var(--spacing-sm);
        min-height: 250px;
    }

    #weight-chart,
    #waist-chart {
        max-height: 200px;
    }

    #macro-distribution-chart,
    #calorie-balance-chart,
    #weight-trend-chart,
    #workout-volume-chart {
        max-height: 250px;
    }

    .chart-legend {
        gap: var(--spacing-sm);
    }

    .chart-legend-item {
        font-size: 12px;
    }

    .chart-legend-color {
        width: 12px;
        height: 12px;
    }
}

/* Chart Animation */
@keyframes chartFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chart-container.loaded {
    animation: chartFadeIn var(--transition-normal);
}