/* Extracted from guides/mixing-monitoring.html — keep in sync if structure changes. */
        .monitoring-hero {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(139, 92, 246, 0.05));
            border-bottom: 1px solid var(--border-color);
            padding: 4rem 0;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .monitoring-hero h1 {
            font-size: 2.5rem;
            margin-bottom: 0.5rem;
            background: linear-gradient(135deg, var(--primary-color), var(--accent-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .monitoring-hero p {
            color: var(--muted-text);
            font-size: 1.1rem;
        }

        .section-card {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(139, 92, 246, 0.05));
            border: 2px solid var(--border-color);
            padding: 2rem;
            margin-bottom: 2rem;
            border-radius: 12px;
            transition: var(--transition);
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }

        .section-card:hover {
            border-color: var(--primary-color);
            box-shadow: 0 6px 12px rgba(0, 212, 255, 0.2);
        }

        .section-card h3 {
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            font-size: 1.8rem;
            padding-bottom: 0.75rem;
            border-bottom: 3px solid var(--primary-color);
            display: inline-block;
            width: 100%;
        }

        .section-card h4 {
            color: var(--primary-color);
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-size: 1.3rem;
            padding-left: 0.5rem;
            border-left: 4px solid var(--secondary-color);
        }

        .section-card p {
            color: var(--muted-text);
            line-height: 1.8;
            margin-bottom: 1.2rem;
        }

        .section-card ul {
            color: var(--muted-text);
            line-height: 2;
            margin-left: 1.5rem;
        }

        .section-card li {
            margin-bottom: 1rem;
            padding-left: 0.5rem;
        }

        .section-card li::marker {
            color: var(--primary-color);
            font-weight: bold;
        }

        .tips-box {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(139, 92, 246, 0.1));
            border-left: 5px solid var(--primary-color);
            border-radius: 8px;
            padding: 1.5rem;
            margin: 2rem 0;
            box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
        }

        .tips-box strong {
            color: var(--primary-color);
            font-size: 1.05rem;
        }

        .back-link {
            margin-bottom: 2rem;
        }

        .back-link a {
            color: var(--primary-color);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-weight: 500;
            transition: var(--transition);
        }

        .back-link a:hover {
            color: var(--secondary-color);
        }

        @media (max-width: 768px) {
            .monitoring-hero h1 {
                font-size: 1.8rem;
            }
        }

        .toc-nav {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 1rem;
            margin: 2rem 0 3rem;
            padding: 0;
        }

        .toc-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            padding: 1.2rem 0.8rem;
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(139, 92, 246, 0.06));
            border: 1px solid var(--border-color);
            border-radius: 10px;
            text-decoration: none;
            color: var(--muted-text);
            transition: var(--transition);
            font-size: 0.85rem;
            line-height: 1.3;
        }

        .toc-item:hover {
            border-color: var(--primary-color);
            transform: translateY(-4px);
            box-shadow: 0 8px 20px rgba(0, 212, 255, 0.15);
            color: var(--primary-color);
        }

        .toc-icon {
            font-size: 2rem;
            margin-bottom: 0.5rem;
            display: block;
        }

        @media (max-width: 480px) {
            .toc-nav {
                grid-template-columns: repeat(2, 1fr);
            }
        }