/* Chart filter buttons */
.chart-filter-btn {
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.chart-filter-btn:hover,
.chart-filter-btn.active {
    background-color: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}