.progress-canvas {
            max-width: 220px;
            margin: 0 auto;
            background: #f8f9fa;
            border-radius: 50%;
            padding: 8px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .stat-card {
            background: white;
            border-left: 4px solid var(--primary-color);
            border-radius: 8px;
            padding: 1rem;
            box-shadow: 0 1px 3px rgba(0,0,0,0.05);
        }
        .stat-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-color);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            color: #6c757d;
        }
        .reverse-card {
            background: #f8fafc;
            border-radius: 16px;
            padding: 1.5rem;
            margin-top: 2rem;
            border: 1px solid #dee2e6;
        }
        .weekday-badge {
            font-size: 1.3rem;
            font-weight: 500;
            background: #e9ecef;
            display: inline-block;
            padding: 0.2rem 1rem;
            border-radius: 40px;
        }
        .legend-progress {
            text-align: center;
            font-size: 0.85rem;
            margin-top: 0.5rem;
            color: #2c3e50;
        }
        .deep-dive {
            text-align: justify;
        }
        .test-case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px,1fr));
            gap: 12px;
            background: #f8f9fa;
            padding: 1rem;
            border-radius: 16px;
        }
        .test-item {
            font-family: monospace;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .stat-number { font-size: 1.6rem; }
        }