v-2h8v2zm-3-5V3.5L18.5 9H13z"/>
                    </svg>
                    Preview YAML
                </button>
            </div>

            <!-- Sidebar Navigation -->
            <nav class="sidebar">
                <div class="sidebar-header">
                    <h3>Configuration Sections</h3>
                </div>

                <!-- Config selector moved from header -->
                <div class="sidebar-config-selector">
                    <div class="config-selector">
                