/* Reset WP Admin Margins */
            #wpcontent { padding: 0 !important; }
            #wpbody-content { padding-bottom: 0 !important; }
            #wpfooter { display: none !important; }
            html.wp-toolbar { padding-top: 32px; }
            @media screen and (max-width: 782px) {
                html.wp-toolbar { padding-top: 46px; }
                #wpcontent { margin-left: 0 !important; padding: 0 !important; }
            }
            @media screen and (max-width: 600px) {
                html.wp-toolbar { padding-top: 0 !important; }
                #wpadminbar { position: fixed !important; top: 0 !important; }
            }
            .models3d-studio-wrap .notice,
            .models3d-studio-wrap div.error,
            .models3d-studio-wrap div.updated {
                display: none !important;
            }
            
            /* Dark Mode as Default: Prevent White Flash / FOUT */
            html.models3d-dark-theme,
            html.models3d-dark-theme body,
            body.models3d-dark-theme,
            .models3d-dark-theme #wpcontent,
            .models3d-dark-theme #wpbody,
            .models3d-dark-theme #wpbody-content {
                background: #090D16 !important;
            }
            
            /* ===== 2026 CREATIVE STUDIO DESIGN TOKENS (Default: Dark Studio Theme) ===== */
            :root, .wrap.models3d-studio-wrap, .models3d-studio-wrap.models3d-dark-theme {
                --m3ds-bg: #090D16;
                --m3ds-sidebar: #0D1322;
                --m3ds-header-bg: #0D1322;
                --m3ds-surface: #131B2E;
                --m3ds-surface-secondary: #182238;
                --m3ds-surface-subtle: #0B0F19;
                --m3ds-surface-hover: #1E2A45;
                --m3ds-surface-card: #131B2E;
                --m3ds-border: rgba(255, 255, 255, 0.08);
                --m3ds-border-subtle: rgba(255, 255, 255, 0.05);
                --m3ds-text: #F8FAFC;
                --m3ds-text-secondary: #CBD5E1;
                --m3ds-text-muted: #94A3B8;
                --m3ds-primary: #6366F1;
                --m3ds-primary-hover: #818CF8;
                --m3ds-primary-light: rgba(99, 102, 241, 0.18);
                --m3ds-primary-glow: rgba(99, 102, 241, 0.35);
                --m3ds-accent: #8B5CF6;
                --m3ds-success: #10B981;
                --m3ds-danger: #EF4444;
                --m3ds-danger-light: #FEF2F2;
                --m3ds-radius-sm: 6px;
                --m3ds-radius-md: 10px;
                --m3ds-radius-lg: 14px;
                --m3ds-shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
                --m3ds-shadow-md: 0 6px 18px rgba(0,0,0,0.45);
                --m3ds-shadow-lg: 0 12px 32px rgba(0,0,0,0.55);
                --m3ds-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
                --m3ds-font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            }

            /* Light Mode Overrides (When explicitly switched away from Dark default) */
            .models3d-studio-wrap:not(.models3d-dark-theme) {
                --m3ds-bg: #F8FAFC;
                --m3ds-sidebar: #FFFFFF;
                --m3ds-header-bg: #FFFFFF;
                --m3ds-surface: #FFFFFF;
                --m3ds-surface-secondary: #F1F5F9;
                --m3ds-surface-subtle: #F8FAFC;
                --m3ds-surface-hover: #F8FAFC;
                --m3ds-surface-card: #FFFFFF;
                --m3ds-border: #E2E8F0;
                --m3ds-border-subtle: #EDF2F7;
                --m3ds-text: #0F172A;
                --m3ds-text-secondary: #475569;
                --m3ds-text-muted: #64748B;
                --m3ds-primary: #6366F1;
                --m3ds-primary-hover: #4F46E5;
                --m3ds-primary-light: #EEF2FF;
                --m3ds-primary-glow: rgba(99, 102, 241, 0.22);
                --m3ds-shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
                --m3ds-shadow-md: 0 4px 12px rgba(0,0,0,0.06);
                --m3ds-shadow-lg: 0 10px 28px rgba(0,0,0,0.08);
            }

            .wrap.models3d-studio-wrap {
                margin: 0;
                max-width: 100%;
                height: calc(100vh - 32px);
                height: calc(100dvh - 32px);
                display: flex;
                flex-direction: column;
                background: var(--m3ds-bg);
                color: var(--m3ds-text);
                font-family: var(--m3ds-font);
                -webkit-font-smoothing: antialiased;
                box-sizing: border-box;
                overflow: hidden;
            }

            /* Studio Top Header */
            .models3d-header {
                display: flex;
                justify-content: space-between;
                align-items: center;
                padding: 12px 24px;
                background: var(--m3ds-header-bg);
                border-bottom: 1px solid var(--m3ds-border);
                flex-shrink: 0;
                gap: 16px;
                box-shadow: var(--m3ds-shadow-sm);
                z-index: 20;
            }
            .models3d-header-title-wrap {
                display: flex;
                align-items: center;
                gap: 10px;
                min-width: 0;
                flex-shrink: 1;
                overflow: hidden;
            }
            .models3d-header h1 {
                margin: 0;
                color: var(--m3ds-text);
                font-size: 16px;
                font-weight: 700;
                letter-spacing: -0.3px;
                line-height: 1;
                display: flex;
                align-items: center;
                gap: 8px;
                min-width: 0;
                flex-shrink: 0;
                white-space: nowrap;
            }
            .m3ds-header-title-text {
                min-width: 0;
                white-space: nowrap;
            }
            .m3ds-header-badge {
                font-size: 10px;
                font-weight: 700;
                text-transform: uppercase;
                letter-spacing: 0.5px;
                padding: 2px 7px;
                border-radius: 4px;
                background: var(--m3ds-primary-light);
                color: var(--m3ds-primary);
                white-space: nowrap;
                flex-shrink: 0;
            }
            .m3ds-header-product-name {
                font-size: 12px;
                font-weight: 500;
                color: var(--m3ds-text-muted);
                padding: 3px 8px;
                background: var(--m3ds-surface-secondary);
                border-radius: 6px;
                max-width: 200px;
                white-space: nowrap;
                overflow: hidden;
                text-overflow: ellipsis;
            }

            /* Header Action Buttons */
            .models3d-header-actions {
                display: flex;
                align-items: center;
                gap: 8px;
                flex-shrink: 0;
                flex-wrap: nowrap;
            }
            .m3ds-header-btn {
                display: inline-flex;
                align-items: center;
                gap: 6px;
                padding: 7px 12px;
                border-radius: var(--m3ds-radius-sm);
                border: 1px solid var(--m3ds-border);
                background: var(--m3ds-surface);
                color: var(--m3ds-text-secondary);
                font-size: 12px;
                font-weight: 600;
                text-decoration: none;
                cursor: pointer;
                transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
                white-space: nowrap;
                flex-shrink: 0;
            }
            .m3ds-header-btn:hover {
                background: var(--m3ds-surface-secondary);
                color: var(--m3ds-text);
                border-color: var(--m3ds-primary);
            }
            .m3ds-view-product-btn {
                border-color: rgba(16, 185, 129, 0.35);
                color: #10B981;
            }
            .m3ds-view-product-btn:hover {
                background: rgba(16, 185, 129, 0.12);
                color: #10B981;
                border-color: #10B981;
            }
            .models3d-header .button-back {
                composes: m3ds-header-btn;
                display: inline-flex;
                align-items: center;
                gap: 6px;
                padding: 7px 12px;
                border-radius: var(--m3ds-radius-sm);
                border: 1px solid var(--m3ds-border);
                background: var(--m3ds-surface);
                color: var(--m3ds-text-secondary);
                font-size: 12px;
                font-weight: 600;
                text-decoration: none;
                transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
                white-space: nowrap;
                flex-shrink: 0;
            }
            .models3d-header .button-back:hover {
                background: var(--m3ds-surface-secondary);
                color: var(--m3ds-text);
                border-color: var(--m3ds-primary);
            }
            .m3ds-btn-primary {
                background: linear-gradient(135deg, var(--m3ds-primary) 0%, var(--m3ds-primary-hover) 100%);
                color: #FFFFFF !important;
                border: none;
                padding: 8px 16px;
                border-radius: var(--m3ds-radius-sm);
                font-size: 13px;
                font-weight: 600;
                letter-spacing: -0.1px;
                cursor: pointer;
                transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
                display: inline-flex;
                align-items: center;
                gap: 6px;
                box-shadow: 0 2px 8px var(--m3ds-primary-glow);
                text-decoration: none;
                white-space: nowrap;
                flex-shrink: 0;
            }
            .m3ds-btn-primary:hover {
                transform: translateY(-1px);
                box-shadow: 0 4px 14px var(--m3ds-primary-glow);
                color: #FFFFFF !important;
            }
            .m3ds-btn-primary:active {
                transform: translateY(0);
            }

            /* Studio Workspace Grid */
            .models3d-dashboard-grid {
                display: grid;
                grid-template-columns: 360px 5px 1fr;
                flex-grow: 1;
                min-height: 0;
            }

            /* Left Sidebar Workspace */
            .models3d-config-column {
                background: var(--m3ds-sidebar);
                border-right: 1px solid var(--m3ds-border);
                padding: 16px;
                overflow-y: auto;
                -webkit-overflow-scrolling: touch;
                overscroll-behavior-y: contain;
                display: flex;
                flex-direction: column;
                gap: 12px;
                scrollbar-width: thin;
                scrollbar-color: var(--m3ds-border) transparent;
            }
            .m3ds-sample-list,
            #tab-sample > div:first-of-type {
                scrollbar-width: thin;
                scrollbar-color: var(--m3ds-border) transparent;
            }
            .models3d-config-column::-webkit-scrollbar,
            .m3ds-sample-list::-webkit-scrollbar,
            #tab-sample > div:first-of-type::-webkit-scrollbar {
                width: 5px;
                height: 5px;
            }
            .models3d-config-column::-webkit-scrollbar-track,
            .m3ds-sample-list::-webkit-scrollbar-track,
            #tab-sample > div:first-of-type::-webkit-scrollbar-track {
                background: transparent;
            }
            .models3d-config-column::-webkit-scrollbar-thumb,
            .m3ds-sample-list::-webkit-scrollbar-thumb,
            #tab-sample > div:first-of-type::-webkit-scrollbar-thumb {
                background: var(--m3ds-border);
                border-radius: 4px;
            }
            .models3d-config-column::-webkit-scrollbar-thumb:hover,
            .m3ds-sample-list::-webkit-scrollbar-thumb:hover,
            #tab-sample > div:first-of-type::-webkit-scrollbar-thumb:hover {
                background: var(--m3ds-primary);
            }

            /* Top View Mode Bar (Visual vs JSON) */
            .m3ds-view-mode-bar {
                display: flex;
                background: var(--m3ds-surface-secondary);
                border: 1px solid var(--m3ds-border-subtle);
                border-radius: var(--m3ds-radius-md);
                padding: 3px;
                gap: 3px;
                margin-bottom: 6px;
            }
            .m3ds-view-mode-btn {
                flex: 1;
                padding: 7px 10px;
                border-radius: var(--m3ds-radius-sm);
                border: none;
                background: transparent;
                color: var(--m3ds-text-secondary);
                font-size: 12px;
                font-weight: 600;
                cursor: pointer;
                transition: all 0.18s ease;
                display: inline-flex;
                align-items: center;
                justify-content: center;
                gap: 6px;
                white-space: nowrap;
                flex-shrink: 0;
            }
            .m3ds-view-mode-btn.is-active {
                background: var(--m3ds-surface);
                color: var(--m3ds-primary);
                box-shadow: var(--m3ds-shadow-sm);
            }
            .m3ds-view-mode-btn:hover:not(.is-active) {
                color: var(--m3ds-text);
            }
            .m3ds-view-mode-btn.m3ds-pro-trigger-json {
                cursor: pointer;
            }
            .m3ds-view-mode-btn.m3ds-pro-trigger-json:hover {
                background: rgba(99, 102, 241, 0.08);
                color: #A5B4FC;
            }
            .m3ds-pro-badge {
                display: inline-flex;
                align-items: center;
                background: linear-gradient(135deg, #8B5CF6 0%, #6366F1 100%);
                color: #FFFFFF;
                padding: 1px 5px;
                border-radius: 4px;
                font-size: 9px;
                font-weight: 700;
                letter-spacing: 0.5px;
                line-height: 1.2;
                margin-left: 4px;
                vertical-align: middle;
            }

            /* ===== STUDIO WORKSPACE SEGMENTED TABS ===== */
            .m3ds-studio-nav {
                display: flex;
                background: var(--m3ds-surface-secondary);
                border: 1px solid var(--m3ds-border);
                border-radius: var(--m3ds-radius-md);
                padding: 4px;
                gap: 4px;
                margin-bottom: 12px;
            }
            .m3ds-studio-tab {
                flex: 1;
                display: inline-flex;
                align-items: center;
                justify-content: center;
                gap: 6px;
                padding: 8px 8px;
                border-radius: var(--m3ds-radius-sm);
                border: none;
                background: transparent;
                color: var(--m3ds-text-secondary);
                font-size: 11px;
                font-weight: 700;
                letter-spacing: -0.1px;
                cursor: pointer;
                transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
                white-space: nowrap;
                user-select: none;
            }
            .m3ds-studio-tab svg {
                width: 14px;
                height: 14px;
                stroke: currentColor;
                stroke-width: 2;
                flex-shrink: 0;
            }
            .m3ds-studio-tab:hover:not(.is-active) {
                color: var(--m3ds-text);
                background: rgba(125, 125, 125, 0.08);
            }
            .m3ds-studio-tab.is-active {
                background: var(--m3ds-surface);
                color: var(--m3ds-primary);
                box-shadow: var(--m3ds-shadow-sm);
            }

            /* Studio Workspace Panels */
            .m3ds-workspace-panel {
                display: none;
                flex-direction: column;
                gap: 14px;
                animation: m3dsFadeIn 0.2s ease;
            }
            .m3ds-workspace-panel.is-active {
                display: flex;
            }

            /* Studio Frameless Section Cards */
            .m3ds-section-card {
                background: var(--m3ds-surface);
                border: 1px solid var(--m3ds-border);
                border-radius: var(--m3ds-radius-lg);
                padding: 16px;
                box-shadow: var(--m3ds-shadow-sm);
                display: flex;
                flex-direction: column;
                gap: 12px;
                transition: border-color 0.2s ease;
            }
            .m3ds-section-header {
                display: flex;
                align-items: center;
                justify-content: space-between;
                gap: 8px;
                padding-bottom: 8px;
                border-bottom: 1px solid var(--m3ds-border-subtle);
            }
            .m3ds-section-title {
                display: inline-flex;
                align-items: center;
                gap: 7px;
                font-size: 13px;
                font-weight: 700;
                color: var(--m3ds-text);
                letter-spacing: -0.2px;
            }
            .m3ds-section-title svg {
                width: 15px;
                height: 15px;
                stroke: var(--m3ds-primary);
                stroke-width: 2;
            }
            .m3ds-label {
                font-size: 11px;
                font-weight: 700;
                color: var(--m3ds-text-secondary);
                text-transform: uppercase;
                letter-spacing: 0.5px;
                display: block;
                margin-bottom: 6px;
            }

            /* Form Elements: Selects */
            .m3ds-select-wrap {
                position: relative;
                width: 100%;
            }
            .m3ds-select {
                appearance: none;
                -webkit-appearance: none;
                width: 100%;
                box-sizing: border-box;
                background: var(--m3ds-surface);
                border: 1px solid var(--m3ds-border);
                color: var(--m3ds-text);
                border-radius: var(--m3ds-radius-md);
                padding: 8px 32px 8px 12px;
                font-size: 13px;
                font-weight: 500;
                cursor: pointer;
                transition: border-color 0.15s, box-shadow 0.15s;
                font-family: inherit;
            }
            .m3ds-select:focus {
                border-color: var(--m3ds-primary) !important;
                outline: none;
                box-shadow: 0 0 0 3px var(--m3ds-primary-glow) !important;
            }
            .m3ds-select-chevron {
                position: absolute;
                right: 12px;
                top: 50%;
                transform: translateY(-50%);
                pointer-events: none;
                width: 14px;
                height: 14px;
                stroke: var(--m3ds-text-muted);
                stroke-width: 2;
            }

            /* Form Elements: Text Inputs */
            .m3ds-input {
                width: 100%;
                box-sizing: border-box;
                background: var(--m3ds-surface);
                border: 1px solid var(--m3ds-border);
                color: var(--m3ds-text);
                border-radius: var(--m3ds-radius-md);
                padding: 8px 12px;
                font-size: 13px;
                font-family: inherit;
                transition: border-color 0.15s, box-shadow 0.15s;
            }
            .m3ds-input:focus {
                border-color: var(--m3ds-primary) !important;
                outline: none;
                box-shadow: 0 0 0 3px var(--m3ds-primary-glow) !important;
            }

            /* Modern Studio Range Sliders */
            .m3ds-slider-row {
                display: flex;
                flex-direction: column;
                gap: 6px;
                margin-bottom: 10px;
            }
            .m3ds-slider-header {
                display: flex;
                align-items: center;
                justify-content: space-between;
            }
            .m3ds-slider-label {
                font-size: 12px;
                font-weight: 600;
                color: var(--m3ds-text-secondary);
            }
            .m3ds-slider-badge {
                font-size: 11px;
                font-family: var(--m3ds-font-mono);
                font-weight: 600;
                padding: 2px 7px;
                border-radius: 4px;
                background: var(--m3ds-surface-secondary);
                color: var(--m3ds-text);
                border: 1px solid var(--m3ds-border);
            }
            .m3ds-slider-track-wrap {
                display: flex;
                align-items: center;
                gap: 10px;
            }
            .m3ds-slider {
                -webkit-appearance: none;
                width: 100%;
                height: 5px;
                border-radius: 3px;
                background: var(--m3ds-border);
                outline: none;
                cursor: pointer;
                touch-action: none;
                transition: all 0.15s ease;
            }
            .m3ds-slider::-moz-range-track {
                width: 100%;
                height: 5px;
                border-radius: 3px;
                background: var(--m3ds-border);
                border: none;
            }
            .m3ds-slider::-webkit-slider-thumb {
                -webkit-appearance: none;
                width: 16px;
                height: 16px;
                border-radius: 50%;
                background: #FFFFFF;
                border: 2px solid var(--m3ds-primary);
                box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
                cursor: pointer;
                transition: transform 0.15s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.15s ease;
            }
            .m3ds-slider::-moz-range-thumb {
                width: 16px;
                height: 16px;
                border-radius: 50%;
                background: #FFFFFF;
                border: 2px solid var(--m3ds-primary);
                box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
                cursor: pointer;
                transition: transform 0.15s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.15s ease;
            }
            .m3ds-slider::-webkit-slider-thumb:hover {
                transform: scale(1.2);
                box-shadow: 0 0 0 4px var(--m3ds-primary-glow);
            }
            .m3ds-slider::-moz-range-thumb:hover {
                transform: scale(1.2);
                box-shadow: 0 0 0 4px var(--m3ds-primary-glow);
            }

            /* Clean Number Inputs Next to Sliders */
            .m3ds-slider-row input[type="number"]::-webkit-inner-spin-button,
            .m3ds-slider-row input[type="number"]::-webkit-outer-spin-button {
                -webkit-appearance: none;
                margin: 0;
            }
            .m3ds-slider-row input[type="number"] {
                -moz-appearance: textfield;
                min-width: 62px;
                box-sizing: border-box;
            }

            /* Modern iOS / Linear Style Switches */
            .m3ds-toggle-switch {
                display: flex;
                align-items: center;
                gap: 12px;
                cursor: pointer;
                font-size: 13px;
                font-weight: 500;
                color: var(--m3ds-text);
                padding: 6px 0;
                user-select: none;
            }
            .m3ds-toggle-switch input[type="checkbox"] {
                position: absolute !important;
                opacity: 0 !important;
                width: 0 !important;
                height: 0 !important;
                margin: 0 !important;
                padding: 0 !important;
                border: 0 !important;
                outline: none !important;
                pointer-events: none !important;
            }
            .m3ds-toggle-switch input[type="checkbox"]::before,
            .m3ds-toggle-switch input[type="checkbox"]::after {
                content: none !important;
                display: none !important;
            }
            .m3ds-toggle-slider {
                position: relative;
                display: inline-block;
                width: 38px;
                min-width: 38px;
                height: 22px;
                background: var(--m3ds-border);
                border-radius: 12px;
                transition: background 0.2s cubic-bezier(0.4, 0, 0.2, 1);
                flex-shrink: 0;
                box-sizing: border-box;
            }
            .m3ds-toggle-slider::before {
                content: "";
                position: absolute;
                top: 2px;
                left: 2px;
                width: 18px;
                height: 18px;
                border-radius: 50%;
                background: #FFFFFF;
                box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
                transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
                box-sizing: border-box;
            }
            .m3ds-toggle-switch input[type="checkbox"]:checked + .m3ds-toggle-slider {
                background: var(--m3ds-primary) !important;
            }
            .m3ds-toggle-switch input[type="checkbox"]:checked + .m3ds-toggle-slider::before {
                transform: translateX(16px);
            }
            .m3ds-toggle-switch input[type="checkbox"]:focus + .m3ds-toggle-slider {
                box-shadow: 0 0 0 2px var(--m3ds-primary-glow);
            }

            /* Modern Buttons */
            .m3ds-btn-secondary {
                background: var(--m3ds-surface-secondary);
                color: var(--m3ds-text);
                border: 1px solid var(--m3ds-border);
                padding: 7px 12px;
                border-radius: var(--m3ds-radius-sm);
                font-size: 12px;
                font-weight: 600;
                cursor: pointer;
                transition: all 0.15s ease;
                display: inline-flex;
                align-items: center;
                gap: 6px;
                text-decoration: none;
                white-space: nowrap;
                flex-shrink: 0;
            }
            .m3ds-btn-secondary:hover {
                background: var(--m3ds-primary-light);
                color: var(--m3ds-primary);
                border-color: var(--m3ds-primary);
            }
            .m3ds-btn-danger {
                background: var(--m3ds-danger-light);
                color: var(--m3ds-danger);
                border: 1px solid rgba(239, 68, 68, 0.2);
                padding: 7px 12px;
                border-radius: var(--m3ds-radius-sm);
                font-weight: 600;
                font-size: 12px;
                cursor: pointer;
                transition: all 0.15s ease;
                display: inline-flex;
                align-items: center;
                gap: 6px;
                text-decoration: none;
                white-space: nowrap;
                flex-shrink: 0;
            }
            .m3ds-btn-danger:hover {
                background: var(--m3ds-danger);
                color: #FFFFFF;
                border-color: var(--m3ds-danger);
            }

            /* Dedicated Camera Capture & Action Buttons */
            .m3ds-term-card-footer {
                display: flex;
                align-items: center;
                justify-content: space-between;
                gap: 8px;
                padding-top: 10px;
                border-top: 1px solid var(--m3ds-border-subtle);
                margin-top: 6px;
            }
            .m3ds-term-card-footer .models3d-capture-camera {
                margin-left: auto;
            }
            .m3ds-cam-btn {
                display: inline-flex;
                align-items: center;
                gap: 6px;
                padding: 6px 12px;
                border-radius: var(--m3ds-radius-sm);
                border: 1px solid var(--m3ds-border);
                background: var(--m3ds-surface-secondary);
                color: var(--m3ds-text);
                font-size: 11px;
                font-weight: 600;
                cursor: pointer;
                transition: all 0.15s ease;
                white-space: nowrap;
                flex-shrink: 0;
                user-select: none;
            }
            .m3ds-cam-btn:hover {
                background: var(--m3ds-primary-light);
                color: var(--m3ds-primary);
                border-color: var(--m3ds-primary);
            }
            .m3ds-cam-btn:active {
                transform: translateY(1px);
            }
            .m3ds-cam-btn svg {
                stroke: currentColor;
                flex-shrink: 0;
            }
            #models3d-capture-camera {
                white-space: nowrap;
                flex-shrink: 0;
            }

            /* Enhanced JSON Code Editor & Actions */
            .m3ds-btn-apply-json {
                width: 100%;
                box-sizing: border-box;
                padding: 12px 18px;
                background: linear-gradient(135deg, var(--m3ds-primary) 0%, var(--m3ds-primary-hover) 100%);
                color: #ffffff !important;
                border: none;
                border-radius: var(--m3ds-radius-md);
                font-size: 13px;
                font-weight: 600;
                letter-spacing: 0.2px;
                cursor: pointer;
                display: inline-flex;
                align-items: center;
                justify-content: center;
                gap: 8px;
                box-shadow: 0 4px 14px var(--m3ds-primary-glow);
                transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            }
            .m3ds-btn-apply-json:hover {
                box-shadow: 0 6px 18px var(--m3ds-primary-glow);
                transform: translateY(-1px);
            }
            .m3ds-json-editor:focus {
                border-color: var(--m3ds-primary) !important;
                box-shadow: 0 0 0 3px var(--m3ds-primary-glow) !important;
            }

            /* Layout Helpers */
            .m3ds-flex-row { display: flex; gap: 12px; align-items: flex-end; margin-bottom: 12px; }
            .m3ds-flex-col { display: flex; flex-direction: column; flex: 1; }

            /* Segmented Switch (Material vs Visibility) */
            .m3ds-segmented-control {
                display: flex;
                background: var(--m3ds-surface-secondary);
                border: 1px solid var(--m3ds-border);
                border-radius: var(--m3ds-radius-md);
                padding: 3px;
                gap: 3px;
            }
            .m3ds-seg-btn {
                flex: 1;
                min-width: 0;
                padding: 6px 8px;
                border: none;
                border-radius: var(--m3ds-radius-sm);
                background: transparent;
                color: var(--m3ds-text-secondary);
                font-size: 11px;
                font-weight: 600;
                cursor: pointer;
                transition: all 0.15s ease;
                white-space: nowrap;
                display: inline-flex;
                align-items: center;
                justify-content: center;
                gap: 5px;
            }
            .m3ds-seg-btn.is-active {
                background: var(--m3ds-surface);
                color: var(--m3ds-primary);
                box-shadow: var(--m3ds-shadow-sm);
            }
            .m3ds-seg-btn:hover:not(.is-active) {
                color: var(--m3ds-text);
            }

            /* ===== ATTRIBUTE NAVIGATION & OPTION PILLS STRIP ===== */
            .m3ds-attr-nav-wrap { display: flex; flex-direction: column; gap: 6px; }
            .m3ds-attr-tabs {
                display: flex;
                gap: 6px;
                overflow-x: auto;
                padding: 2px 2px 6px 2px;
                scrollbar-width: thin;
                scrollbar-color: var(--m3ds-border) transparent;
                -webkit-overflow-scrolling: touch;
                cursor: grab;
            }
            .m3ds-attr-tabs.is-dragging {
                cursor: grabbing;
                user-select: none;
            }
            .m3ds-attr-tabs.is-dragging * {
                cursor: grabbing !important;
                user-select: none !important;
            }
            .m3ds-attr-tabs::-webkit-scrollbar { height: 4px; }
            .m3ds-attr-tabs::-webkit-scrollbar-track { background: transparent; }
            .m3ds-attr-tabs::-webkit-scrollbar-thumb {
                background: var(--m3ds-border);
                border-radius: 4px;
            }
            .m3ds-attr-tab {
                display: inline-flex;
                align-items: center;
                gap: 6px;
                padding: 6px 12px;
                min-height: 34px;
                box-sizing: border-box;
                border-radius: var(--m3ds-radius-md);
                border: 1px solid var(--m3ds-border);
                background: var(--m3ds-surface);
                font-size: 12px;
                font-weight: 600;
                color: var(--m3ds-text-secondary);
                cursor: pointer;
                transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
                white-space: nowrap;
                flex-shrink: 0;
                user-select: none;
            }
            .m3ds-attr-tab:hover {
                border-color: var(--m3ds-primary);
                color: var(--m3ds-text);
                background: var(--m3ds-surface-secondary);
            }
            .m3ds-attr-tab.is-active {
                border-color: var(--m3ds-primary);
                background: var(--m3ds-primary);
                color: #FFFFFF;
                box-shadow: 0 2px 8px var(--m3ds-primary-glow);
            }
            .m3ds-attr-tab-count {
                font-size: 10px;
                font-weight: 700;
                padding: 1px 5px;
                border-radius: 10px;
                background: rgba(0,0,0,0.06);
            }
            .m3ds-attr-tab.is-active .m3ds-attr-tab-count {
                background: rgba(255,255,255,0.25);
                color: #FFFFFF;
            }

            /* Option Pills Strip (Horizontal Smooth Scroll) */
            .m3ds-var-strip-wrap { display: flex; flex-direction: column; gap: 4px; }
            .m3ds-var-strip-label {
                font-size: 11px;
                font-weight: 700;
                color: var(--m3ds-text-muted);
                text-transform: uppercase;
                letter-spacing: 0.5px;
            }
            .m3ds-var-strip {
                display: flex;
                gap: 8px;
                overflow-x: auto;
                padding: 2px 2px 6px 2px;
                scrollbar-width: thin;
                scrollbar-color: var(--m3ds-border) transparent;
                -webkit-overflow-scrolling: touch;
                cursor: grab;
            }
            .m3ds-var-strip.is-dragging {
                cursor: grabbing;
                user-select: none;
            }
            .m3ds-var-strip.is-dragging * {
                cursor: grabbing !important;
                user-select: none !important;
            }
            .m3ds-var-strip::-webkit-scrollbar { height: 4px; }
            .m3ds-var-strip::-webkit-scrollbar-track { background: transparent; }
            .m3ds-var-strip::-webkit-scrollbar-thumb {
                background: var(--m3ds-border);
                border-radius: 4px;
            }
            .m3ds-var-pill {
                display: inline-flex;
                align-items: center;
                gap: 8px;
                padding: 6px 13px;
                min-height: 34px;
                box-sizing: border-box;
                border-radius: 20px;
                border: 1px solid var(--m3ds-border);
                background: var(--m3ds-surface);
                color: var(--m3ds-text);
                font-size: 12px;
                font-weight: 600;
                cursor: pointer;
                transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
                white-space: nowrap;
                flex-shrink: 0;
                box-shadow: var(--m3ds-shadow-sm);
                user-select: none;
            }
            .m3ds-var-pill:hover {
                border-color: var(--m3ds-primary);
                color: var(--m3ds-primary);
                transform: translateY(-1px);
            }
            .m3ds-var-pill.is-active {
                border-color: var(--m3ds-primary);
                background: var(--m3ds-primary-light);
                color: var(--m3ds-primary);
                box-shadow: 0 0 0 2px var(--m3ds-primary-glow), var(--m3ds-shadow-sm);
                font-weight: 700;
                transform: translateY(-1px);
            }
            .m3ds-var-dot {
                position: relative;
                width: 12px;
                height: 12px;
                border-radius: 50%;
                border: 1.5px solid rgba(0,0,0,0.18);
                flex-shrink: 0;
                box-shadow: inset 0 1px 2px rgba(0,0,0,0.15);
                display: inline-flex;
                align-items: center;
                justify-content: center;
                transition: transform 0.18s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.18s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.18s cubic-bezier(0.4, 0, 0.2, 1);
            }
            .m3ds-var-pill:not(.is-active) .m3ds-var-dot {
                opacity: 0.65;
                transform: scale(0.9);
            }
            .m3ds-var-pill.is-active .m3ds-var-dot {
                opacity: 1;
                transform: scale(1.15);
                border-color: #FFFFFF;
                box-shadow: 0 0 0 2px var(--m3ds-surface-card), 0 0 0 4px var(--m3ds-primary), inset 0 1px 2px rgba(0,0,0,0.25);
            }
            .m3ds-var-pill.is-active .m3ds-var-dot::after {
                content: "";
                display: block;
                width: 4px;
                height: 4px;
                border-radius: 50%;
                background: var(--m3ds-primary);
                box-shadow: 0 0 2px rgba(0,0,0,0.35);
            }
            .m3ds-var-badge {
                font-size: 10px;
                font-weight: 600;
                padding: 1px 5px;
                border-radius: 8px;
                background: var(--m3ds-surface-secondary);
                color: var(--m3ds-text-secondary);
            }
            .m3ds-var-pill.is-active .m3ds-var-badge {
                background: rgba(99, 102, 241, 0.18);
                color: var(--m3ds-primary);
            }

            /* Focused Active Option Inspector Card */
            .m3ds-mapping-card:not(.is-focused-active) { display: none !important; }
            .m3ds-term-card:not(.is-focused-active) { display: none !important; }
            .m3ds-term-card.is-focused-active {
                display: flex !important;
                width: 100% !important;
                box-sizing: border-box !important;
                border: 1px solid var(--m3ds-border) !important;
                border-radius: var(--m3ds-radius-lg) !important;
                box-shadow: var(--m3ds-shadow-md) !important;
                background: var(--m3ds-surface) !important;
                padding: 16px;
                flex-direction: column;
                gap: 14px;
                animation: m3dsFadeIn 0.2s ease;
            }
            .m3ds-term-grid {
                display: flex !important;
                flex-direction: column !important;
                gap: 0 !important;
                margin-top: 0 !important;
            }
            .m3ds-mapping-card {
                border: none !important;
                padding: 0 !important;
                background: transparent !important;
                box-shadow: none !important;
            }
            .m3ds-mapping-card .m3ds-card-header { display: none !important; }

            .m3ds-term-card-header {
                display: flex;
                flex-direction: row;
                align-items: center;
                justify-content: space-between;
                gap: 10px;
                position: sticky;
                top: -16px;
                background: var(--m3ds-surface);
                z-index: 10;
                padding-top: 2px;
                padding-bottom: 12px;
                margin-top: -4px;
                border-bottom: 1px solid var(--m3ds-border);
            }
            .m3ds-term-card-body {
                display: flex;
                flex-direction: column;
                gap: 14px;
            }
            .m3ds-term-action-settings {
                display: flex;
                flex-direction: column;
                gap: 12px;
                background: var(--m3ds-surface-secondary);
                border: 1px solid var(--m3ds-border);
                border-radius: var(--m3ds-radius-md);
                padding: 12px;
            }
            .m3ds-target-count-badge {
                font-size: 10px;
                font-weight: 700;
                padding: 1px 7px;
                border-radius: 10px;
                background: var(--m3ds-primary-light);
                color: var(--m3ds-primary);
                display: inline-flex;
                align-items: center;
                line-height: 1.3;
            }
            /* Channel 1: Material & Finish Accordion Section */
            .m3ds-channel-material-section {
                width: 100%;
            }
            .m3ds-channel-material-header {
                user-select: none;
                transition: opacity 0.15s ease;
            }
            .m3ds-channel-material-header:hover {
                opacity: 0.85;
            }
            .m3ds-mat-chevron {
                display: inline-block;
                color: var(--m3ds-text-muted);
            }
            .m3ds-channel-material-section.is-collapsed .m3ds-mat-chevron {
                transform: rotate(-90deg) !important;
            }
            .m3ds-channel-material-section.is-collapsed .m3ds-channel-material-body {
                display: none !important;
            }
            .m3ds-mat-header-swatch {
                box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.25);
                vertical-align: middle;
            }
            .m3ds-layer-selection-hint {
                font-size: 11px;
                color: var(--m3ds-text-muted);
                margin-bottom: 8px;
                line-height: 1.35;
            }
            .m3ds-material-section-header {
                display: flex;
                align-items: center;
                justify-content: space-between;
                margin-bottom: 10px;
            }
            .m3ds-material-status-badge {
                font-size: 10px;
                font-weight: 700;
                padding: 2px 8px;
                border-radius: 12px;
                display: inline-flex;
                align-items: center;
                gap: 4px;
                transition: all 0.25s ease;
            }
            .m3ds-material-status-badge.is-active {
                background: rgba(16, 185, 129, 0.15);
                color: #10B981;
            }
            .m3ds-material-status-badge.is-locked {
                background: rgba(239, 68, 68, 0.12);
                color: #EF4444;
            }
            .m3ds-material-gate-notice {
                display: flex;
                align-items: flex-start;
                gap: 10px;
                background: rgba(99, 102, 241, 0.08);
                border: 1px dashed rgba(99, 102, 241, 0.32);
                border-radius: var(--m3ds-radius-md);
                padding: 10px 12px;
                margin-bottom: 12px;
                transition: all 0.25s ease;
            }
            .m3ds-material-gate-notice .m3ds-gate-icon {
                font-size: 15px;
                line-height: 1.2;
                flex-shrink: 0;
            }
            .m3ds-material-gate-notice .m3ds-gate-text {
                display: flex;
                flex-direction: column;
                gap: 2px;
                font-size: 11px;
                line-height: 1.4;
                color: var(--m3ds-text-secondary);
            }
            .m3ds-material-gate-notice .m3ds-gate-text strong {
                color: var(--m3ds-text);
                font-size: 12px;
            }
            .m3ds-material-controls-wrapper {
                transition: opacity 0.25s ease, filter 0.25s ease;
            }
            .m3ds-material-controls-wrapper.is-gated-controls {
                opacity: 0.38;
                pointer-events: none;
                filter: grayscale(0.85);
                user-select: none;
            }
            .m3ds-term-name {
                font-size: 14px;
                font-weight: 700;
                color: var(--m3ds-text);
                letter-spacing: -0.2px;
                text-align: left;
                margin: 0;
            }
            .m3ds-term-header-badges {
                display: inline-flex;
                align-items: center;
                gap: 6px;
                margin-left: auto;
            }
            .m3ds-previewing-badge {
                font-size: 10px;
                font-weight: 700;
                text-transform: uppercase;
                letter-spacing: 0.5px;
                background: var(--m3ds-primary-light);
                color: var(--m3ds-primary);
                border-radius: 4px;
                padding: 3px 7px;
                display: inline-flex;
                align-items: center;
                gap: 4px;
            }

            /* Single / Multi Mode Switch */
            .m3ds-term-mode-toggle {
                font-size: 10px;
                display: flex;
                background: var(--m3ds-surface-secondary);
                border: 1px solid var(--m3ds-border);
                border-radius: 12px;
                padding: 2px;
            }
            .m3ds-term-mode-label {
                padding: 2px 7px;
                cursor: pointer;
                border-radius: 10px;
                transition: all 0.18s ease;
                font-weight: 600;
            }
            .m3ds-term-mode-label.is-active {
                background: var(--m3ds-primary);
                color: #FFFFFF;
            }

            /* Mesh Search Bar */
            .m3ds-mesh-search-wrap {
                width: 100%;
                position: relative;
                margin-bottom: 4px;
            }
            .m3ds-mesh-search-input,
            .m3ds-mesh-search-wrap input.m3ds-mesh-search-input,
            .models3d-studio-wrap input.m3ds-mesh-search-input {
                width: 100% !important;
                padding: 7px 10px 7px 32px !important;
                font-size: 12px !important;
                border: 1px solid var(--m3ds-border) !important;
                border-radius: var(--m3ds-radius-md) !important;
                background: var(--m3ds-surface);
                color: var(--m3ds-text);
                box-sizing: border-box !important;
                min-height: 32px !important;
                line-height: normal !important;
                transition: all 0.15s;
                font-family: inherit;
            }
            .m3ds-mesh-search-input:focus,
            .m3ds-mesh-search-wrap input.m3ds-mesh-search-input:focus,
            .models3d-studio-wrap input.m3ds-mesh-search-input:focus {
                border-color: var(--m3ds-primary) !important;
                outline: none !important;
                box-shadow: 0 0 0 3px var(--m3ds-primary-glow) !important;
            }
            .m3ds-mesh-search-icon {
                position: absolute;
                left: 10px;
                top: 50%;
                transform: translateY(-50%);
                font-size: 12px;
                color: var(--m3ds-text-muted);
                pointer-events: none;
                display: flex;
                align-items: center;
                z-index: 2;
            }

            /* Mesh Categories Accordion */
            .m3ds-mesh-categories-wrap {
                display: flex;
                flex-direction: column;
                gap: 8px;
                width: 100%;
                max-height: 280px;
                overflow-y: auto;
                padding-right: 4px;
                box-sizing: border-box;
                scrollbar-width: thin;
                scrollbar-color: rgba(148, 163, 184, 0.4) transparent;
            }
            .m3ds-mesh-categories-wrap::-webkit-scrollbar {
                width: 5px;
            }
            .m3ds-mesh-categories-wrap::-webkit-scrollbar-track {
                background: transparent;
            }
            .m3ds-mesh-categories-wrap::-webkit-scrollbar-thumb {
                background: rgba(148, 163, 184, 0.35);
                border-radius: 4px;
            }
            .m3ds-mesh-categories-wrap::-webkit-scrollbar-thumb:hover {
                background: var(--m3ds-primary);
            }
            .models3d-dark-theme .m3ds-mesh-categories-wrap {
                scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
            }
            .models3d-dark-theme .m3ds-mesh-categories-wrap::-webkit-scrollbar-thumb {
                background: rgba(255, 255, 255, 0.18);
            }
            .models3d-dark-theme .m3ds-mesh-categories-wrap::-webkit-scrollbar-thumb:hover {
                background: #818cf8;
            }
            .m3ds-mesh-category {
                border: 1px solid var(--m3ds-border);
                border-radius: var(--m3ds-radius-md);
                background: var(--m3ds-surface);
                overflow: hidden;
                transition: border-color 0.15s;
                flex-shrink: 0;
            }
            .m3ds-mesh-category.is-collapsed .m3ds-mesh-category-body { display: none !important; }
            .m3ds-mesh-category.is-hidden { display: none !important; }

            .m3ds-mesh-category-header {
                display: flex;
                align-items: center;
                justify-content: space-between;
                padding: 8px 12px;
                background: var(--m3ds-surface-secondary);
                cursor: pointer;
                user-select: none;
                transition: background 0.15s;
                flex-shrink: 0;
                min-height: 36px;
                box-sizing: border-box;
            }
            .m3ds-mesh-category-header:hover {
                background: rgba(125,125,125,0.08);
            }
            .m3ds-category-title-wrap {
                display: flex;
                align-items: center;
                gap: 7px;
                font-size: 12px;
                font-weight: 700;
                color: var(--m3ds-text);
            }
            .m3ds-category-count {
                font-size: 10px;
                font-weight: 600;
                padding: 1px 5px;
                border-radius: 8px;
                background: var(--m3ds-border);
                color: var(--m3ds-text-secondary);
            }
            .m3ds-category-chevron {
                font-size: 9px;
                color: var(--m3ds-text-muted);
                transition: transform 0.2s ease;
                display: inline-block;
            }
            .m3ds-mesh-category.is-collapsed .m3ds-category-chevron { transform: rotate(-90deg); }

            .m3ds-category-actions { display: flex; align-items: center; gap: 4px; }
            .m3ds-category-btn {
                font-size: 10px;
                font-weight: 600;
                padding: 2px 7px;
                border: 1px solid var(--m3ds-border);
                border-radius: 4px;
                background: var(--m3ds-surface);
                color: var(--m3ds-text-secondary);
                cursor: pointer;
                transition: all 0.15s;
            }
            .m3ds-category-btn:hover {
                background: var(--m3ds-primary);
                border-color: var(--m3ds-primary);
                color: #FFFFFF;
            }

            .m3ds-mesh-category-body {
                padding: 10px;
                display: flex;
                flex-wrap: wrap;
                gap: 6px;
                background: var(--m3ds-surface);
            }

            /* Interactive Mesh Tag Chips */
            .m3ds-chip {
                display: inline-flex;
                align-items: center;
                gap: 6px;
                padding: 5px 11px;
                border-radius: 16px;
                border: 1px solid var(--m3ds-border);
                background: var(--m3ds-surface-secondary);
                color: var(--m3ds-text-secondary);
                font-size: 11px;
                font-weight: 600;
                cursor: pointer;
                transition: all 0.15s ease;
                user-select: none;
            }
            .m3ds-chip input[type="checkbox"], .m3ds-chip input[type="radio"] { display: none; }
            .m3ds-chip::before {
                content: "";
                display: inline-block;
                width: 7px;
                height: 7px;
                border-radius: 50%;
                background: var(--m3ds-text-muted);
                transition: all 0.15s ease;
            }
            .m3ds-chip.is-checked::before {
                background: var(--m3ds-primary);
                box-shadow: 0 0 0 2px #FFFFFF;
            }
            .m3ds-chip:hover:not(.is-checked) {
                border-color: var(--m3ds-primary);
                color: var(--m3ds-text);
            }
            .m3ds-chip.is-checked {
                background: var(--m3ds-primary-light);
                border-color: var(--m3ds-primary);
                color: var(--m3ds-primary);
                box-shadow: 0 1px 3px var(--m3ds-primary-glow);
            }
            .m3ds-chip.is-none-chip.is-checked {
                background: var(--m3ds-surface-secondary);
                border-color: var(--m3ds-border);
                color: var(--m3ds-text-muted);
            }
            .m3ds-chip.is-hidden {
                display: none !important;
            }

            /* Channel 2: Part Visibility Overrides Tags & Dropdown */
            .m3ds-vis-tags-wrap {
                display: flex;
                flex-wrap: wrap;
                gap: 6px;
                min-height: 24px;
                align-items: center;
                margin-bottom: 6px;
            }
            .m3ds-vis-tag {
                display: inline-flex;
                align-items: center;
                gap: 6px;
                font-size: 11px;
                font-weight: 600;
                padding: 3px 8px;
                border-radius: 6px;
                transition: all 0.15s ease;
            }
            .m3ds-vis-tag-hide {
                background: rgba(239, 68, 68, 0.12);
                color: #ef4444;
                border: 1px solid rgba(239, 68, 68, 0.25);
            }
            .m3ds-vis-tag-show {
                background: rgba(16, 185, 129, 0.12);
                color: #10b981;
                border: 1px solid rgba(16, 185, 129, 0.25);
            }
            .m3ds-vis-remove-tag-btn {
                background: none;
                border: none;
                color: inherit;
                cursor: pointer;
                padding: 0 2px;
                font-size: 11px;
                line-height: 1;
                opacity: 0.6;
                transition: opacity 0.15s ease;
            }
            .m3ds-vis-remove-tag-btn:hover {
                opacity: 1;
            }
            .m3ds-vis-empty-hint {
                font-size: 11px;
                color: var(--m3ds-text-muted);
                font-style: italic;
                padding: 2px 0;
            }
            .m3ds-vis-add-select {
                font-size: 11px !important;
                padding: 5px 8px !important;
                width: 100% !important;
                border-radius: var(--m3ds-radius-sm) !important;
                background: var(--m3ds-surface-secondary) !important;
                border: 1px solid var(--m3ds-border) !important;
                color: var(--m3ds-text) !important;
                cursor: pointer;
            }
            .m3ds-vis-add-select:focus {
                border-color: var(--m3ds-primary) !important;
                outline: none;
            }

            /* Live Search Combobox & Pick Button */
            .m3ds-vis-search-wrap {
                position: relative;
                flex: 1;
            }
            .m3ds-vis-search-input {
                width: 100% !important;
                font-size: 11px !important;
                padding: 5px 8px !important;
                border-radius: var(--m3ds-radius-sm) !important;
                background: var(--m3ds-surface-secondary) !important;
                border: 1px solid var(--m3ds-border) !important;
                color: var(--m3ds-text) !important;
            }
            .m3ds-vis-search-input:focus {
                border-color: var(--m3ds-primary) !important;
                outline: none;
            }
            .m3ds-vis-search-results {
                position: absolute;
                top: calc(100% + 2px);
                left: 0;
                right: 0;
                max-height: 180px;
                overflow-y: auto;
                background: var(--m3ds-surface-secondary, #1E293B);
                border: 1px solid var(--m3ds-border, #334155);
                border-radius: var(--m3ds-radius-sm);
                z-index: 100;
                box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
                display: flex;
                flex-direction: column;
            }
            .m3ds-vis-search-item {
                padding: 6px 10px;
                font-size: 11px;
                color: var(--m3ds-text);
                cursor: pointer;
                display: flex;
                justify-content: space-between;
                align-items: center;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
                transition: background 0.15s ease;
            }
            .m3ds-vis-search-item:last-child {
                border-bottom: none;
            }
            .m3ds-vis-search-item:hover,
            .m3ds-vis-search-item.is-selected {
                background: var(--m3ds-primary-light, rgba(99, 102, 241, 0.2));
                color: var(--m3ds-primary, #6366F1);
            }
            .m3ds-vis-search-mesh-sub {
                font-size: 9.5px;
                color: var(--m3ds-text-muted);
                font-family: var(--m3ds-font-mono);
            }
            .m3ds-vis-pick-btn {
                display: inline-flex !important;
                align-items: center !important;
                gap: 5px !important;
                font-size: 11px !important;
                font-weight: 600 !important;
                padding: 5px 10px !important;
                border-radius: var(--m3ds-radius-sm) !important;
                border: 1px solid var(--m3ds-border) !important;
                background: var(--m3ds-surface-secondary) !important;
                color: var(--m3ds-text-secondary) !important;
                cursor: pointer !important;
                transition: all 0.15s ease !important;
                white-space: nowrap !important;
                flex-shrink: 0 !important;
            }
            .m3ds-vis-pick-btn:hover {
                border-color: var(--m3ds-primary) !important;
                color: var(--m3ds-primary) !important;
            }
            .m3ds-vis-pick-btn.is-active {
                background: #EF4444 !important;
                border-color: #EF4444 !important;
                color: #FFFFFF !important;
                box-shadow: 0 0 10px rgba(239, 68, 68, 0.4) !important;
                animation: m3dsPulse 1.5s infinite ease-in-out;
            }
            .m3ds-vis-pick-btn[data-type="show"].is-active {
                background: #10B981 !important;
                border-color: #10B981 !important;
                color: #FFFFFF !important;
                box-shadow: 0 0 10px rgba(16, 185, 129, 0.4) !important;
            }
            .m3ds-vis-clear-all-btn {
                background: none;
                border: none;
                color: var(--m3ds-text-muted, #94A3B8);
                font-size: 10px;
                cursor: pointer;
                text-decoration: underline;
                padding: 0;
                transition: color 0.15s;
            }
            .m3ds-vis-clear-all-btn:hover {
                color: #EF4444;
            }

            /* Floating Canvas HUD for 3D Pick Mode */
            .m3ds-canvas-pick-hud {
                position: absolute;
                top: 14px;
                left: 50%;
                transform: translateX(-50%);
                z-index: 1000;
                background: rgba(15, 23, 42, 0.92);
                backdrop-filter: blur(10px);
                -webkit-backdrop-filter: blur(10px);
                border: 1px solid rgba(255, 255, 255, 0.18);
                border-radius: 24px;
                padding: 6px 14px;
                display: flex;
                align-items: center;
                gap: 12px;
                color: #FFFFFF;
                font-size: 12px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
                animation: m3dsFadeIn 0.2s ease;
                user-select: none;
            }
            .m3ds-canvas-pick-hud strong {
                color: #FFFFFF;
                font-weight: 700;
            }
            .m3ds-canvas-pick-hud em {
                color: #93C5FD;
                font-style: normal;
                font-weight: 600;
            }
            .m3ds-pick-hud-dot {
                width: 8px;
                height: 8px;
                border-radius: 50%;
                display: inline-block;
                animation: m3dsPulse 1.2s infinite;
            }
            .m3ds-pick-hud-done {
                background: rgba(255, 255, 255, 0.18);
                border: 1px solid rgba(255, 255, 255, 0.25);
                color: #FFFFFF;
                font-size: 11px;
                font-weight: 700;
                padding: 3px 10px;
                border-radius: 12px;
                cursor: pointer;
                transition: all 0.15s ease;
            }
            .m3ds-pick-hud-done:hover {
                background: #FFFFFF;
                color: #0F172A;
            }

            /* High-Contrast Base Color Row */
            .m3ds-color-row {
                display: flex;
                align-items: center;
                justify-content: space-between;
                padding: 8px 12px;
                background: var(--m3ds-surface-secondary);
                border: 1px solid var(--m3ds-border);
                border-radius: var(--m3ds-radius-md);
                margin-bottom: 12px;
            }
            .m3ds-color-info {
                display: flex;
                flex-direction: column;
                gap: 2px;
            }
            .m3ds-color-title {
                font-size: 12px;
                font-weight: 700;
                color: var(--m3ds-text);
            }
            .m3ds-swatch-hex {
                font-size: 11px;
                font-family: var(--m3ds-font-mono);
                font-weight: 600;
                color: var(--m3ds-text-secondary);
            }

            /* PBR Presets Bar */
            .m3ds-pbr-presets-wrap { margin-bottom: 12px; }
            .m3ds-presets-title {
                font-size: 11px;
                font-weight: 700;
                color: var(--m3ds-text-muted);
                text-transform: uppercase;
                letter-spacing: 0.5px;
                display: flex;
                align-items: center;
                gap: 6px;
                margin-bottom: 8px;
            }
            .m3ds-preset-pills { display: flex; flex-wrap: wrap; gap: 6px; }
            .m3ds-preset-pill {
                display: inline-flex;
                align-items: center;
                gap: 5px;
                padding: 5px 10px;
                border-radius: 8px;
                border: 1px solid var(--m3ds-border);
                background: var(--m3ds-surface-secondary);
                color: var(--m3ds-text-secondary);
                font-size: 11px;
                font-weight: 600;
                cursor: pointer;
                transition: all 0.15s ease;
                user-select: none;
            }
            .m3ds-preset-pill svg {
                width: 13px;
                height: 13px;
                stroke: currentColor;
                stroke-width: 2;
                flex-shrink: 0;
            }
            .m3ds-preset-pill:hover {
                border-color: var(--m3ds-primary);
                color: var(--m3ds-primary);
                background: var(--m3ds-primary-light);
            }
            .m3ds-preset-pill.is-active {
                border-color: var(--m3ds-primary);
                background: var(--m3ds-primary);
                color: #FFFFFF;
                box-shadow: 0 2px 8px var(--m3ds-primary-glow);
            }

            /* Model Asset Summary Card */
            .m3ds-asset-badge-card {
                background: var(--m3ds-surface-secondary);
                border: 1px solid var(--m3ds-border);
                border-radius: var(--m3ds-radius-lg);
                padding: 14px;
                display: flex;
                flex-direction: column;
                gap: 10px;
            }
            .m3ds-asset-badge-header {
                display: flex;
                align-items: center;
                justify-content: space-between;
                gap: 8px;
            }
            .m3ds-asset-badge-title {
                display: flex;
                align-items: center;
                gap: 8px;
                font-size: 13px;
                font-weight: 700;
                color: var(--m3ds-text);
            }
            .m3ds-asset-meta-chips {
                display: flex;
                gap: 6px;
                flex-wrap: wrap;
            }
            .m3ds-asset-meta-chip {
                display: inline-flex;
                align-items: center;
                gap: 4px;
                font-size: 11px;
                font-weight: 600;
                padding: 3px 8px;
                border-radius: 6px;
                background: var(--m3ds-surface);
                border: 1px solid var(--m3ds-border);
                color: var(--m3ds-text-secondary);
            }

            /* Model Uploader Container */
            #models3d-uploader-container {
                border: 1.5px dashed var(--m3ds-border);
                padding: 16px;
                text-align: center;
                background: var(--m3ds-surface);
                color: var(--m3ds-text-secondary);
                border-radius: var(--m3ds-radius-lg);
                transition: all 0.2s;
            }
            #models3d-uploader-container:hover {
                border-color: var(--m3ds-primary);
                background: var(--m3ds-surface-hover);
            }

            /* Splitter */
            .models3d-splitter {
                background: var(--m3ds-border);
                cursor: col-resize;
                transition: background 0.2s;
                position: relative;
            }
            .models3d-splitter:hover, .models3d-splitter:active {
                background: var(--m3ds-primary);
            }

            /* 3D Canvas Column & Floating Controls */
            .models3d-canvas-column {
                position: relative;
                background: #0B0F19;
                z-index: 10;
                overflow: hidden;
            }
            .models3d-canvas-column:fullscreen,
            .models3d-canvas-column:-webkit-full-screen,
            .models3d-canvas-column.is-canvas-fullscreen {
                position: fixed !important;
                inset: 0 !important;
                width: 100vw !important;
                height: 100vh !important;
                height: 100dvh !important;
                z-index: 999999 !important;
            }
            .m3ds-canvas-floating-controls {
                position: absolute;
                bottom: 20px;
                bottom: calc(20px + env(safe-area-inset-bottom, 0px));
                right: 20px;
                right: calc(20px + env(safe-area-inset-right, 0px));
                display: flex;
                flex-direction: column;
                gap: 8px;
                z-index: 50;
            }
            .m3ds-floating-btn {
                min-width: 42px;
                min-height: 42px;
                width: 42px;
                height: 42px;
                border-radius: var(--m3ds-radius-md);
                background: rgba(15, 23, 42, 0.75);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                border: 1px solid rgba(255, 255, 255, 0.15);
                color: #F8FAFC;
                box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
                display: flex;
                align-items: center;
                justify-content: center;
                cursor: pointer;
                transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
                padding: 0;
            }
            .m3ds-floating-btn:hover {
                background: rgba(30, 41, 59, 0.9);
                color: #A5B4FC;
                border-color: #818CF8;
                transform: translateY(-2px);
                box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
            }
            .m3ds-floating-btn:active { transform: translateY(0); }

            /* Toast Notification */
            #models3d-inspector-toast {
                position: absolute;
                bottom: 24px;
                left: 50%;
                transform: translateX(-50%);
                background: rgba(15, 23, 42, 0.9);
                backdrop-filter: blur(10px);
                color: #FFFFFF;
                padding: 8px 16px;
                border-radius: 20px;
                font-size: 12px;
                font-weight: 600;
                z-index: 100;
                display: flex;
                align-items: center;
                gap: 8px;
                box-shadow: 0 8px 24px rgba(0,0,0,0.4);
                border: 1px solid rgba(255,255,255,0.15);
                pointer-events: none;
                transition: opacity 0.25s, transform 0.25s;
            }
            #models3d-inspector-toast.is-hidden {
                opacity: 0;
                transform: translate(-50%, 8px);
            }

            /* Animations */
            @keyframes m3dsFadeIn {
                from { opacity: 0; transform: translateY(3px); }
                to { opacity: 1; transform: translateY(0); }
            }

            /* ===== HIGH-CONTRAST DARK MODE OVERRIDES ===== */
            .models3d-studio-wrap.models3d-dark-theme {
                --m3ds-bg: #090D16;
                --m3ds-sidebar: #0D1322;
                --m3ds-header-bg: #0D1322;
                --m3ds-surface: #131B2E;
                --m3ds-surface-secondary: #182238;
                --m3ds-surface-subtle: #0B0F19;
                --m3ds-surface-hover: #1E2A45;
                --m3ds-surface-card: #131B2E;
                --m3ds-border: rgba(255, 255, 255, 0.08);
                --m3ds-border-subtle: rgba(255, 255, 255, 0.05);
                --m3ds-text: #F8FAFC;
                --m3ds-text-secondary: #CBD5E1;
                --m3ds-text-muted: #94A3B8;
                --m3ds-primary: #6366F1;
                --m3ds-primary-hover: #818CF8;
                --m3ds-primary-light: rgba(99, 102, 241, 0.18);
                --m3ds-primary-glow: rgba(99, 102, 241, 0.35);
                --m3ds-shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
                --m3ds-shadow-md: 0 6px 18px rgba(0,0,0,0.45);
                --m3ds-shadow-lg: 0 12px 32px rgba(0,0,0,0.55);
            }

            .models3d-studio-wrap.models3d-dark-theme .m3ds-select,
            .models3d-studio-wrap.models3d-dark-theme .m3ds-input,
            .models3d-studio-wrap.models3d-dark-theme .m3ds-mesh-search-input {
                background: #0B0F19 !important;
                border-color: rgba(255, 255, 255, 0.1) !important;
                color: #F8FAFC !important;
            }
            .models3d-studio-wrap.models3d-dark-theme .m3ds-studio-tab.is-active {
                background: #182238;
                color: #A5B4FC;
            }
            .models3d-studio-wrap.models3d-dark-theme .m3ds-var-pill.is-active {
                background: rgba(99, 102, 241, 0.25);
                color: #C7D2FE;
                border-color: #818CF8;
            }
            .models3d-studio-wrap.models3d-dark-theme .m3ds-var-pill.is-active .m3ds-var-dot {
                border-color: rgba(255, 255, 255, 0.6);
                box-shadow: 0 0 0 2px #131B2E, 0 0 0 4px #818CF8, inset 0 1px 2px rgba(0,0,0,0.4);
            }
            .models3d-studio-wrap.models3d-dark-theme .m3ds-var-pill.is-active .m3ds-var-dot::after {
                background: #818CF8;
            }
            .models3d-studio-wrap.models3d-dark-theme .m3ds-chip.is-checked {
                background: rgba(99, 102, 241, 0.25);
                border-color: #818CF8;
                color: #C7D2FE;
            }
            .models3d-studio-wrap.models3d-dark-theme .m3ds-chip.is-checked::before {
                background: #818CF8;
                box-shadow: 0 0 0 2px #0B0F19;
            }
            .models3d-studio-wrap.models3d-dark-theme .m3ds-swatch-hex {
                color: #CBD5E1;
            }
            .models3d-studio-wrap.models3d-dark-theme .m3ds-json-editor {
                background: #070A13 !important;
                border-color: rgba(255, 255, 255, 0.08) !important;
                color: #38BDF8 !important;
            }
            .models3d-studio-wrap.models3d-dark-theme .m3ds-sample-list,
            .models3d-studio-wrap.models3d-dark-theme #tab-sample > div:first-of-type,
            .models3d-studio-wrap.models3d-dark-theme .models3d-config-column {
                scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
            }
            .models3d-studio-wrap.models3d-dark-theme .m3ds-sample-list::-webkit-scrollbar-thumb,
            .models3d-studio-wrap.models3d-dark-theme #tab-sample > div:first-of-type::-webkit-scrollbar-thumb,
            .models3d-studio-wrap.models3d-dark-theme .models3d-config-column::-webkit-scrollbar-thumb {
                background: rgba(255, 255, 255, 0.18);
            }
            .models3d-studio-wrap.models3d-dark-theme .m3ds-sample-list::-webkit-scrollbar-thumb:hover,
            .models3d-studio-wrap.models3d-dark-theme #tab-sample > div:first-of-type::-webkit-scrollbar-thumb:hover,
            .models3d-studio-wrap.models3d-dark-theme .models3d-config-column::-webkit-scrollbar-thumb:hover {
                background: #818CF8;
            }

            /* ===== RESPONSIVE OPTIMIZATIONS ===== */
            .m3ds-btn-label-mobile { display: none; }

            /* Tablet Portrait & Small Screens (<= 900px) */
            @media (max-width: 900px) {
                .wrap.models3d-studio-wrap {
                    height: calc(100vh - 32px);
                    height: calc(100dvh - 32px);
                }
                .models3d-header {
                    padding: 10px 14px;
                    gap: 10px;
                }
                .models3d-header h1 {
                    font-size: 14px;
                    white-space: nowrap;
                }
                .m3ds-header-product-name {
                    max-width: 110px;
                }
                .models3d-dashboard-grid {
                    grid-template-columns: 1fr !important;
                    grid-template-rows: 40vh 1fr !important;
                }
                .models3d-splitter {
                    display: none !important;
                }
                .models3d-canvas-column {
                    order: 1 !important;
                    height: 40vh !important;
                    min-height: 200px !important;
                }
                .models3d-config-column {
                    order: 2 !important;
                    padding: 14px !important;
                }

                /* Toast notification positioning so it never clashes with controls in stacked mode */
                #models3d-inspector-toast {
                    top: 14px;
                    top: calc(14px + env(safe-area-inset-top, 0px));
                    bottom: auto;
                    max-width: calc(100% - 24px);
                    box-sizing: border-box;
                    font-size: 11px;
                    text-align: center;
                    padding: 6px 12px;
                }

                /* Enhanced touch slider thumbs on tablets and mobiles */
                .m3ds-slider {
                    height: 6px;
                }
                .m3ds-slider::-webkit-slider-thumb {
                    width: 22px;
                    height: 22px;
                }
                .m3ds-slider::-moz-range-thumb {
                    width: 22px;
                    height: 22px;
                }
            }

            /* Mobile Landscape Mode (width <= 900px and height <= 520px) */
            @media (max-width: 900px) and (orientation: landscape) and (max-height: 520px) {
                .models3d-dashboard-grid {
                    grid-template-columns: minmax(300px, 45%) 1fr !important;
                    grid-template-rows: 1fr !important;
                }
                .models3d-canvas-column {
                    order: 2 !important;
                    height: 100% !important;
                    min-height: 0 !important;
                }
                .models3d-config-column {
                    order: 1 !important;
                    height: 100% !important;
                    padding: 10px !important;
                }
                .models3d-header {
                    padding: 5px 12px;
                }
                .models3d-header h1 {
                    font-size: 13px;
                }
                .m3ds-json-editor {
                    min-height: 160px !important;
                }
            }

            @media (max-width: 960px) {
                .m3ds-header-product-name { display: none; }
            }
            @media (max-width: 820px) {
                .m3ds-header-badge { display: none; }
            }

            /* WordPress Mobile Breakpoint (<= 782px) */
            @media (max-width: 782px) {
                .wrap.models3d-studio-wrap {
                    height: calc(100vh - 46px);
                    height: calc(100dvh - 46px);
                }
                #m3ds-theme-text { display: none; }

                /* Prevent iOS auto-zoom on input focus */
                .m3ds-input,
                .m3ds-select,
                .m3ds-mesh-search-input,
                .models3d-studio-wrap input.m3ds-mesh-search-input,
                .models3d-studio-wrap input[type="number"],
                .models3d-studio-wrap input[type="text"] {
                    font-size: 16px !important;
                }

                /* Mobile JSON editor size */
                .m3ds-json-editor {
                    min-height: 240px !important;
                }

                /* Tap highlight removal */
                .models3d-studio-wrap * {
                    -webkit-tap-highlight-color: transparent;
                }

                /* Category Action Buttons Comfortable Touch Targets */
                .m3ds-category-btn {
                    padding: 5px 10px;
                    font-size: 11px;
                }
            }

            /* Compact Mobile Screens (<= 640px) */
            @media (max-width: 640px) {
                .models3d-header {
                    padding: 8px 10px;
                    gap: 8px;
                }
                .m3ds-header-product-name { display: none; }
                .m3ds-header-badge { display: none; }
                #m3ds-theme-text { display: none; }
                .m3ds-btn-label { display: none; }
                .m3ds-btn-label-mobile { display: inline; }
                .models3d-header .button-back,
                .m3ds-btn-primary,
                .m3ds-header-btn {
                    padding: 6px 10px;
                    font-size: 12px;
                    white-space: nowrap;
                    flex-shrink: 0;
                }
                .m3ds-floating-btn {
                    min-width: 40px;
                    min-height: 40px;
                    width: 40px;
                    height: 40px;
                }
                .m3ds-canvas-floating-controls {
                    bottom: calc(12px + env(safe-area-inset-bottom, 0px));
                    right: calc(12px + env(safe-area-inset-right, 0px));
                }

                /* Studio Nav bar scrollable on small screens */
                .m3ds-studio-nav {
                    overflow-x: auto;
                    scrollbar-width: none;
                    -webkit-overflow-scrolling: touch;
                }
                .m3ds-studio-nav::-webkit-scrollbar {
                    display: none;
                }
                .m3ds-studio-tab {
                    padding: 7px 8px;
                    font-size: 10.5px;
                }
                .m3ds-studio-tab svg {
                    width: 13px;
                    height: 13px;
                }

                /* Option cards tap targets */
                .m3ds-chip {
                    padding: 6px 12px;
                    font-size: 12px;
                }
                .m3ds-term-card.is-focused-active {
                    padding: 12px;
                    gap: 12px;
                }
                .m3ds-term-action-settings {
                    padding: 10px;
                }

                /* Centered mobile save confirmation toast */
                #models3d-save-toast {
                    top: calc(52px + env(safe-area-inset-top, 0px)) !important;
                    right: 12px !important;
                    left: 12px !important;
                    max-width: calc(100% - 24px) !important;
                    justify-content: center;
                    box-sizing: border-box;
                }
            }

            /* Small Mobile Screens (<= 480px) */
            @media (max-width: 480px) {
                .m3ds-header-title-text {
                    display: inline-block;
                    max-width: 110px;
                    overflow: hidden;
                    text-overflow: ellipsis;
                    white-space: nowrap;
                }
            }

            /* Extra Small Mobile Screens (<= 420px) */
            @media (max-width: 420px) {
                .models3d-header {
                    padding: 6px 8px;
                    gap: 6px;
                }
                .models3d-header h1 {
                    font-size: 13px;
                }
                .models3d-header h1 svg {
                    width: 15px;
                    height: 15px;
                }
                .models3d-header-actions {
                    gap: 5px;
                }
                .models3d-header .button-back,
                .m3ds-btn-primary,
                .m3ds-header-btn {
                    padding: 5px 8px;
                    font-size: 11.5px;
                }
                .m3ds-docs-btn svg {
                    margin: 0;
                }
                .m3ds-term-card-footer {
                    flex-direction: column;
                    align-items: stretch;
                    gap: 8px;
                }
                .m3ds-term-card-footer .m3ds-cam-btn {
                    width: 100%;
                    justify-content: center;
                }
                .m3ds-term-card-footer .models3d-capture-camera {
                    margin-left: 0;
                }
            }

            /* Micro Screens (<= 380px) */
            @media (max-width: 380px) {
                .m3ds-header-title-text {
                    max-width: 75px;
                }
            }

            /* Opt-out of cross-document navigation view transitions for the 3D studio viewport */
            @view-transition {
                navigation: none;
            }