/* statistiques-chaine — styles page (migration DA, ne pas dupliquer la coque) */

.filter-btn {
            background: rgba(255, 255, 255, 0.1);
            color: white;
            padding: 8px 16px;
            border-radius: 6px;
            font-weight: 500;
            transition: all 0.3s ease;
            border: 1px solid rgba(255, 255, 255, 0.2);
            cursor: pointer;
        }
        .filter-btn.active {
            background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
            border-color: #ff6b35;
        }
        .metric-card {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .chart-container {
            position: relative;
            height: 400px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 12px;
            padding: 20px;
        }