diff --git a/src/interface/CMakeLists.txt b/src/interface/CMakeLists.txt
index 015aac0da6..370dabb600 100644
--- a/src/interface/CMakeLists.txt
+++ b/src/interface/CMakeLists.txt
@@ -25,14 +25,20 @@ find_package(Qt${QT_VERSION} COMPONENTS Core Gui Widgets Svg REQUIRED PATHS ${QT
 
 set(INTERFACE_FILES
     ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/ElementRegistry.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/ElementRegistry.h
     ${CMAKE_CURRENT_SOURCE_DIR}/MainWindow.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/MainWindow.h
     ${CMAKE_CURRENT_SOURCE_DIR}/components/SvgIcon.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/components/SvgIcon.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/components/Style.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/components/Style.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/components/KeyValueTable.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/components/KeyValueTable.h
     ${CMAKE_CURRENT_SOURCE_DIR}/components/Section.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/components/Section.h
-    ${CMAKE_CURRENT_SOURCE_DIR}/components/PanelChrome.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}/components/PanelChrome.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/components/Panel.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/components/Panel.h
     ${CMAKE_CURRENT_SOURCE_DIR}/panels/models/ModelsPanelTypes.h
     ${CMAKE_CURRENT_SOURCE_DIR}/panels/models/ModelsPanelWidget.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/panels/models/ModelsPanelWidget.h
diff --git a/src/interface/ElementRegistry.cpp b/src/interface/ElementRegistry.cpp
new file mode 100644
index 0000000000..1e41385d33
--- /dev/null
+++ b/src/interface/ElementRegistry.cpp
@@ -0,0 +1,82 @@
+// This file was generated with the assistance of an AI coding tool.
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#include "ElementRegistry.h"
+
+#include "../ifcviewer/GeometryStreamer.h"
+#include "../ifcviewer/SceneLoader.h"
+#include "../ifcviewer/SidecarCache.h"
+
+namespace ifcinterface {
+
+ElementRegistry::ElementRegistry(QObject* parent)
+    : QObject(parent)
+{
+}
+
+void ElementRegistry::bindLoader(SceneLoader* loader) {
+    connect(loader, &SceneLoader::sidecarElementsReady,
+            this, &ElementRegistry::onSidecarElementsReady);
+    connect(loader, &SceneLoader::streamedElementsReady,
+            this, &ElementRegistry::onStreamedElementsReady);
+}
+
+std::optional<BasicElementInfo> ElementRegistry::find(uint32_t object_id) const {
+    auto it = elements_.find(object_id);
+    if (it == elements_.end()) return std::nullopt;
+    return it->second;
+}
+
+void ElementRegistry::onSidecarElementsReady(uint32_t /*mid*/,
+                                             std::vector<PackedElementInfo> elements,
+                                             std::string string_table) {
+    auto str = [&](uint32_t offset, uint32_t length) -> QString {
+        if (length == 0 || offset + length > string_table.size()) return {};
+        return QString::fromStdString(string_table.substr(offset, length));
+    };
+
+    for (const auto& pe : elements) {
+        BasicElementInfo info;
+        info.object_id = pe.object_id;
+        info.model_id = pe.model_id;
+        info.ifc_id = pe.ifc_id;
+        info.parent_id = pe.parent_id;
+        info.guid = str(pe.guid_offset, pe.guid_length);
+        info.name = str(pe.name_offset, pe.name_length);
+        info.type = str(pe.type_offset, pe.type_length);
+        elements_[info.object_id] = info;
+    }
+}
+
+void ElementRegistry::onStreamedElementsReady(uint32_t /*mid*/, std::vector<ElementInfo> elements) {
+    for (const auto& e : elements) {
+        BasicElementInfo info;
+        info.object_id = e.object_id;
+        info.model_id = e.model_id;
+        info.ifc_id = e.ifc_id;
+        info.parent_id = e.parent_id;
+        info.guid = QString::fromStdString(e.guid);
+        info.name = QString::fromStdString(e.name);
+        info.type = QString::fromStdString(e.type);
+        elements_[info.object_id] = info;
+    }
+}
+
+} // namespace ifcinterface
diff --git a/src/interface/ElementRegistry.h b/src/interface/ElementRegistry.h
new file mode 100644
index 0000000000..471e53f31f
--- /dev/null
+++ b/src/interface/ElementRegistry.h
@@ -0,0 +1,66 @@
+// This file was generated with the assistance of an AI coding tool.
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef IFCINTERFACE_ELEMENTREGISTRY_H
+#define IFCINTERFACE_ELEMENTREGISTRY_H
+
+#include <QObject>
+#include <QString>
+#include <optional>
+#include <unordered_map>
+#include <vector>
+#include <string>
+
+class SceneLoader;
+struct PackedElementInfo;
+struct ElementInfo;
+
+namespace ifcinterface {
+
+struct BasicElementInfo {
+    uint32_t object_id = 0;
+    uint32_t model_id = 0;
+    int ifc_id = 0;
+    int parent_id = 0;
+    QString guid;
+    QString name;
+    QString type;
+};
+
+class ElementRegistry : public QObject {
+    Q_OBJECT
+public:
+    explicit ElementRegistry(QObject* parent = nullptr);
+
+    void bindLoader(SceneLoader* loader);
+    std::optional<BasicElementInfo> find(uint32_t object_id) const;
+
+private:
+    void onSidecarElementsReady(uint32_t mid,
+                                std::vector<PackedElementInfo> elements,
+                                std::string string_table);
+    void onStreamedElementsReady(uint32_t mid, std::vector<ElementInfo> elements);
+
+    std::unordered_map<uint32_t, BasicElementInfo> elements_;
+};
+
+} // namespace ifcinterface
+
+#endif
diff --git a/src/interface/MainWindow.cpp b/src/interface/MainWindow.cpp
index 1f0fb7b021..28907cc495 100644
--- a/src/interface/MainWindow.cpp
+++ b/src/interface/MainWindow.cpp
@@ -23,7 +23,9 @@
 #include "../ifcviewer/AppSettings.h"
 #include "../ifcviewer/SceneLoader.h"
 #include "../ifcviewer/ViewportWindow.h"
-#include "components/PanelChrome.h"
+#include "ElementRegistry.h"
+#include "components/Panel.h"
+#include "components/Style.h"
 #include "components/SvgIcon.h"
 #include "panels/todo/TodoPanelWidget.h"
 #include "panels/models/ModelsPanelView.h"
@@ -52,9 +54,10 @@ namespace ifcinterface::shell {
 MainWindow::MainWindow(QWidget* parent)
     : QMainWindow(parent)
 {
+    element_registry_ = new ifcinterface::ElementRegistry(this);
     setupChrome();
     setupViewport();
-    setupDocks();
+    setupPanels();
     setupStatus();
     setupLoader();
     setupRibbon();
@@ -66,280 +69,7 @@ void MainWindow::setupChrome() {
     setDockOptions(QMainWindow::AllowNestedDocks |
                    QMainWindow::AllowTabbedDocks |
                    QMainWindow::GroupedDragging);
-
-    setStyleSheet(R"(
-        QMainWindow {
-            background: #26292f;
-        }
-        QWidget {
-            color: #d0d5dd;
-            background: #26292f;
-            selection-background-color: #39b54a;
-            selection-color: #14161a;
-        }
-        QFrame#ribbonShell {
-            background: #2d3138;
-            border-bottom: 1px solid #1b1d22;
-        }
-        QTabBar::tab {
-            background: transparent;
-            color: #8d97a7;
-            padding: 8px 14px;
-            margin-right: 2px;
-            border-bottom: 2px solid transparent;
-        }
-        QTabBar::tab:selected {
-            color: #f2f5fa;
-            border-bottom: 2px solid #39b54a;
-        }
-        QTabBar::tab:hover {
-            color: #ffffff;
-        }
-        QFrame#ribbonBand {
-            background: #31353d;
-            border-top: 1px solid #3b4048;
-        }
-        QFrame#ribbonPage {
-            background: transparent;
-        }
-        QFrame#ribbonGroup {
-            background: transparent;
-            border-right: 1px solid #434852;
-        }
-        QLabel#ribbonGroupLabel {
-            color: #7f8796;
-            font-size: 9px;
-            font-weight: 600;
-            letter-spacing: 0.08em;
-        }
-        QToolButton#ribbonButton {
-            background: transparent;
-            border: none;
-            padding: 6px 4px 4px 4px;
-            font-size: 11px;
-            color: #d6dce6;
-        }
-        QToolButton#ribbonButton:hover {
-            background: #3a3f48;
-        }
-        QToolButton#ribbonButton:pressed {
-            background: #24282f;
-        }
-        QFrame#viewportShell {
-            background: #202329;
-            border-top: 1px solid #1d2025;
-        }
-        QFrame#viewportFrame {
-            background: #1a1d22;
-            border: 1px solid #333942;
-        }
-        QDockWidget {
-            color: #d0d5dd;
-        }
-        QLabel#dockTitleText {
-            color: #dfe4ec;
-            font-size: 10px;
-            font-weight: 700;
-            letter-spacing: 0.08em;
-        }
-        QToolButton#dockTitleButton {
-            color: #8e97a5;
-            border: none;
-            background: transparent;
-        }
-        QToolButton#dockTitleButton:hover {
-            color: #ffffff;
-            background: #353a42;
-        }
-        QFrame#panelFrame {
-            background: #2b2f36;
-            border: 1px solid #3e444e;
-            border-radius: 3px;
-        }
-        QWidget#panelBody {
-            background: #2b2f36;
-        }
-        QTreeWidget, QListWidget, QTableWidget, QAbstractScrollArea {
-            background: #2b2f36;
-            border: none;
-            outline: none;
-            gridline-color: #333842;
-        }
-        QTreeWidget::viewport, QListWidget::viewport, QTableWidget::viewport {
-            background: #2b2f36;
-        }
-        QHeaderView::section {
-            background: #31353d;
-            color: #b5becc;
-            border: none;
-            border-bottom: 1px solid #434a55;
-            padding: 7px 8px;
-            font-weight: 600;
-        }
-        QTableCornerButton::section {
-            background: #31353d;
-            border: none;
-        }
-        QScrollArea {
-            background: #2b2f36;
-            border: none;
-        }
-        QScrollArea > QWidget > QWidget {
-            background: #2b2f36;
-        }
-        QLineEdit {
-            background: #31353d;
-            border: 1px solid #434a55;
-            border-radius: 3px;
-            padding: 6px 8px;
-            color: #d9dfeb;
-        }
-        QLineEdit:focus {
-            border: 1px solid #5b6472;
-        }
-        QFrame#entityClassCard {
-            background: #26292f;
-            border: 1px solid #404650;
-            border-radius: 3px;
-        }
-        QLabel#entityClassLabel {
-            color: #eef2f8;
-            font-weight: 700;
-            background: transparent;
-        }
-        QLabel#entityTypeLabel {
-            color: #9aa4b3;
-            background: transparent;
-        }
-        QWidget#attributeList {
-            background: transparent;
-        }
-        QTreeView::item, QListView::item, QTableView::item {
-            padding: 4px;
-        }
-        QScrollBar:vertical {
-            background: transparent;
-            width: 10px;
-            margin: 2px 2px 2px 0;
-        }
-        QScrollBar:horizontal {
-            background: transparent;
-            height: 10px;
-            margin: 0 2px 2px 2px;
-        }
-        QScrollBar::handle:vertical, QScrollBar::handle:horizontal {
-            background: #525a67;
-            border-radius: 3px;
-            min-height: 24px;
-            min-width: 24px;
-        }
-        QScrollBar::handle:vertical:hover, QScrollBar::handle:horizontal:hover {
-            background: #697385;
-        }
-        QScrollBar::add-line, QScrollBar::sub-line,
-        QScrollBar::add-page, QScrollBar::sub-page {
-            background: transparent;
-            border: none;
-        }
-        QStatusBar {
-            background: #24272c;
-            border-top: 1px solid #1a1c20;
-        }
-        QStatusBar QLabel {
-            color: #97a1af;
-            background: transparent;
-            border: none;
-            padding: 2px 8px;
-        }
-        QGroupBox {
-            background: transparent;
-            border: 1px solid #404650;
-            border-radius: 3px;
-            margin-top: 10px;
-            padding-top: 10px;
-        }
-        QGroupBox#propertySetCard {
-            background: #26292f;
-            border: 1px solid #404650;
-            border-radius: 3px;
-        }
-        QGroupBox#propertySetCard::title {
-            subcontrol-origin: margin;
-            left: 10px;
-            padding: 0 4px;
-            color: #d5dbe5;
-        }
-        QGroupBox#propertySetCard > QWidget {
-            background: #26292f;
-        }
-        QWidget#panelSection {
-            background: transparent;
-        }
-        QWidget#panelSectionFilterWrapper {
-            background: transparent;
-        }
-        QWidget#relationshipRow {
-            background: transparent;
-        }
-        QLabel#relationshipIconLabel {
-            background: transparent;
-        }
-        QWidget#inspectorPanel {
-            background: #2b2f36;
-        }
-        QFrame#panelSectionHeader {
-            background: #26292f;
-        }
-        QToolButton#panelSectionHeaderButton {
-            background: transparent;
-            border: none;
-            color: #e1e7f0;
-            font-weight: 700;
-            text-align: left;
-            padding: 2px;
-            margin: 0;
-        }
-        QToolButton#panelSectionHeaderButton:hover {
-            color: #ffffff;
-        }
-        QToolButton#panelSectionHeaderButton::menu-indicator {
-            image: none;
-            width: 0;
-        }
-        QToolButton#panelSectionFilterToggle {
-            background: transparent;
-            border: none;
-            padding: 2px;
-        }
-        QToolButton#panelSectionFilterToggle:hover {
-            background: #353a42;
-        }
-        QWidget#panelSectionBody {
-            background: transparent;
-        }
-        QLabel#propertyKeyLabel {
-            color: #9aa4b3;
-            background: transparent;
-        }
-        QLabel#propertyValueLabel {
-            color: #dce2eb;
-            background: transparent;
-        }
-        QLabel#relationshipValueLabel {
-            color: #dce2eb;
-            background: transparent;
-        }
-        QLabel#todoPanelTitle {
-            font-size: 14px;
-            font-weight: 600;
-            color: #e1e6ee;
-            background: transparent;
-        }
-        QLabel#todoPanelBody {
-            color: #8f98a6;
-            background: transparent;
-        }
-    )");
+    setStyleSheet(components::style::buildAppStyleSheet());
 }
 
 QToolButton* MainWindow::makeRibbonAction(const QString& text, const QString& icon_path) {
@@ -376,17 +106,13 @@ QWidget* MainWindow::makeRibbonGroup(const QString& title, const QList<QToolButt
     return group;
 }
 
-QWidget* MainWindow::makeComingSoonPanel(const QString& title) {
-    return new panels::todo::TodoPanelWidget(title, this);
-}
-
 void MainWindow::setStatusMessage(const QString& mode, const QString& detail) {
     status_mode_label_->setText(mode);
     status_selection_label_->setText(detail);
 }
 
 QToolButton* MainWindow::makePanelToggle(const QString& text, QDockWidget* dock) {
-    auto* button = makeRibbonAction(text, ":/icons/dm_toggle_openings.png");
+    auto* button = makeRibbonAction(text, ":/icons/sidebar-expand.svg");
     button->setCheckable(true);
     button->setChecked(dock->isVisible());
     connect(button, &QToolButton::toggled, dock, [dock](bool checked) {
@@ -565,19 +291,20 @@ QWidget* MainWindow::buildPanelsRibbonPage() {
     row->setSpacing(0);
 
     row->addWidget(makeRibbonGroup("DATA", {
-        makePanelToggle("Models", models_dock_),
-        makePanelToggle("Spatial", spatial_dock_),
-        makePanelToggle("Layers", layers_dock_),
-        makePanelToggle("Properties", properties_dock_)
+        makePanelToggle("Models", models_panel_),
+        makePanelToggle("Spatial", spatial_panel_),
+        makePanelToggle("Layers", layers_panel_),
+        makePanelToggle("Properties", properties_panel_)
     }));
     row->addWidget(makeRibbonGroup("QUERY", {
-        makePanelToggle("Views", stored_views_dock_),
-        makePanelToggle("Search", search_dock_),
-        makePanelToggle("Sheets", spreadsheet_dock_)
+        makePanelToggle("Views", stored_views_panel_),
+        makePanelToggle("Search", search_panel_),
+        makePanelToggle("Sheets", spreadsheet_panel_),
+        makePanelToggle("Audit", audit_panel_)
     }));
     row->addWidget(makeRibbonGroup("COLLABORATE", {
-        makePanelToggle("Clash", clash_dock_),
-        makePanelToggle("Issues", issues_dock_)
+        makePanelToggle("Clash", clash_panel_),
+        makePanelToggle("Issues", issues_panel_)
     }));
     row->addStretch(1);
     return page;
@@ -644,68 +371,67 @@ void MainWindow::setupViewport() {
     setCentralWidget(shell);
 }
 
-void MainWindow::setupDocks() {
-    auto* models_panel = new panels::models::ModelsPanelWidget(this);
-    auto* spatial_panel = new panels::spatial_hierarchy::SpatialHierarchyPanelWidget(this);
-    auto* properties_panel = new panels::properties::PropertiesPanelWidget(this);
+void MainWindow::setupPanels() {
+    auto* models_widget = new panels::models::ModelsPanelWidget(this);
+    auto* spatial_widget = new panels::spatial_hierarchy::SpatialHierarchyPanelWidget(this);
+    auto* properties_widget = new panels::properties::PropertiesPanelWidget(this);
 
-    models_panel_view_ = new panels::models::ModelsPanelView(models_panel, this);
-    spatial_panel_view_ = new panels::spatial_hierarchy::SpatialHierarchyPanelView(spatial_panel, this);
-    properties_panel_view_ = new panels::properties::PropertiesPanelView(properties_panel, this);
+    models_view_ = new panels::models::ModelsPanelView(models_widget, this);
+    spatial_view_ = new panels::spatial_hierarchy::SpatialHierarchyPanelView(spatial_widget, this);
+    properties_view_ = new panels::properties::PropertiesPanelView(
+        properties_widget, viewport_, element_registry_, this);
 
-    connect(models_panel_view_, &panels::models::ModelsPanelView::statusMessageRequested,
+    connect(models_view_, &panels::models::ModelsPanelView::statusMessageRequested,
             this, &MainWindow::setStatusMessage);
-    connect(spatial_panel_view_, &panels::spatial_hierarchy::SpatialHierarchyPanelView::statusMessageRequested,
+    connect(spatial_view_, &panels::spatial_hierarchy::SpatialHierarchyPanelView::statusMessageRequested,
             this, &MainWindow::setStatusMessage);
 
-    models_dock_ = components::panel::makeDock(
-        "Models", components::panel::wrapPanel(models_panel), this, true);
-    spatial_dock_ = components::panel::makeDock(
-        "Spatial Hierarchy", components::panel::wrapPanel(spatial_panel), this);
-    properties_dock_ = components::panel::makeDock(
-        "Properties", components::panel::wrapPanel(properties_panel), this);
-    layers_dock_ = components::panel::makeDock(
-        "Layers", components::panel::wrapPanel(makeComingSoonPanel("Layers")), this);
-    stored_views_dock_ = components::panel::makeDock(
-        "Stored Views", components::panel::wrapPanel(makeComingSoonPanel("Stored Views")), this);
-    search_dock_ = components::panel::makeDock(
-        "Search and Query", components::panel::wrapPanel(makeComingSoonPanel("Search and Query")), this);
-    spreadsheet_dock_ = components::panel::makeDock(
-        "Spreadsheet", components::panel::wrapPanel(makeComingSoonPanel("Spreadsheet")), this);
-    clash_dock_ = components::panel::makeDock(
-        "Clash", components::panel::wrapPanel(makeComingSoonPanel("Clash")), this);
-    issues_dock_ = components::panel::makeDock(
-        "Issues", components::panel::wrapPanel(makeComingSoonPanel("Issues")), this);
+    models_panel_ = new components::Panel("Models", models_widget, this, true);
+    spatial_panel_ = new components::Panel("Spatial Hierarchy", spatial_widget, this);
+    properties_panel_ = new components::Panel("Properties", properties_widget, this);
+    layers_panel_ = new components::Panel("Layers", new panels::todo::TodoPanelWidget("Layers", this), this);
+    stored_views_panel_ = new components::Panel(
+        "Stored Views", new panels::todo::TodoPanelWidget("Stored Views", this), this);
+    search_panel_ = new components::Panel(
+        "Search and Query", new panels::todo::TodoPanelWidget("Search and Query", this), this);
+    spreadsheet_panel_ = new components::Panel(
+        "Spreadsheet", new panels::todo::TodoPanelWidget("Spreadsheet", this), this);
+    audit_panel_ = new components::Panel("Audit", new panels::todo::TodoPanelWidget("Audit", this), this);
+    clash_panel_ = new components::Panel("Clash", new panels::todo::TodoPanelWidget("Clash", this), this);
+    issues_panel_ = new components::Panel("Issues", new panels::todo::TodoPanelWidget("Issues", this), this);
 
-    addDockWidget(Qt::LeftDockWidgetArea, models_dock_);
-    addDockWidget(Qt::LeftDockWidgetArea, spatial_dock_);
-    splitDockWidget(models_dock_, spatial_dock_, Qt::Vertical);
+    addDockWidget(Qt::LeftDockWidgetArea, models_panel_);
+    addDockWidget(Qt::LeftDockWidgetArea, spatial_panel_);
+    splitDockWidget(models_panel_, spatial_panel_, Qt::Vertical);
 
-    addDockWidget(Qt::RightDockWidgetArea, properties_dock_);
-    addDockWidget(Qt::RightDockWidgetArea, layers_dock_);
-    addDockWidget(Qt::RightDockWidgetArea, stored_views_dock_);
-    addDockWidget(Qt::RightDockWidgetArea, search_dock_);
-    addDockWidget(Qt::RightDockWidgetArea, spreadsheet_dock_);
-    addDockWidget(Qt::RightDockWidgetArea, clash_dock_);
-    addDockWidget(Qt::RightDockWidgetArea, issues_dock_);
+    addDockWidget(Qt::RightDockWidgetArea, properties_panel_);
+    addDockWidget(Qt::RightDockWidgetArea, layers_panel_);
+    addDockWidget(Qt::RightDockWidgetArea, stored_views_panel_);
+    addDockWidget(Qt::RightDockWidgetArea, search_panel_);
+    addDockWidget(Qt::RightDockWidgetArea, spreadsheet_panel_);
+    addDockWidget(Qt::RightDockWidgetArea, audit_panel_);
+    addDockWidget(Qt::RightDockWidgetArea, clash_panel_);
+    addDockWidget(Qt::RightDockWidgetArea, issues_panel_);
 
-    tabifyDockWidget(properties_dock_, layers_dock_);
-    tabifyDockWidget(layers_dock_, stored_views_dock_);
-    tabifyDockWidget(stored_views_dock_, search_dock_);
-    tabifyDockWidget(search_dock_, spreadsheet_dock_);
-    tabifyDockWidget(spreadsheet_dock_, clash_dock_);
-    tabifyDockWidget(clash_dock_, issues_dock_);
-    properties_dock_->raise();
+    tabifyDockWidget(properties_panel_, layers_panel_);
+    tabifyDockWidget(layers_panel_, stored_views_panel_);
+    tabifyDockWidget(stored_views_panel_, search_panel_);
+    tabifyDockWidget(search_panel_, spreadsheet_panel_);
+    tabifyDockWidget(spreadsheet_panel_, audit_panel_);
+    tabifyDockWidget(audit_panel_, clash_panel_);
+    tabifyDockWidget(clash_panel_, issues_panel_);
+    properties_panel_->raise();
 
-    layers_dock_->hide();
-    stored_views_dock_->hide();
-    search_dock_->hide();
-    spreadsheet_dock_->hide();
-    clash_dock_->hide();
-    issues_dock_->hide();
+    layers_panel_->hide();
+    stored_views_panel_->hide();
+    search_panel_->hide();
+    spreadsheet_panel_->hide();
+    audit_panel_->hide();
+    clash_panel_->hide();
+    issues_panel_->hide();
 
-    resizeDocks({models_dock_, properties_dock_}, {290, 330}, Qt::Horizontal);
-    resizeDocks({models_dock_, spatial_dock_}, {280, 240}, Qt::Vertical);
+    resizeDocks({models_panel_, properties_panel_}, {290, 330}, Qt::Horizontal);
+    resizeDocks({models_panel_, spatial_panel_}, {280, 240}, Qt::Vertical);
 }
 
 void MainWindow::setupStatus() {
@@ -728,6 +454,7 @@ void MainWindow::setupStatus() {
 void MainWindow::setupLoader() {
     AppSettings::instance().setLoadDataSource(false);
     loader_ = new SceneLoader(viewport_, this);
+    element_registry_->bindLoader(loader_);
     connect(loader_, &SceneLoader::loadStarted, this, &MainWindow::onLoadStarted);
     connect(loader_, &SceneLoader::loadedFromSidecar, this, &MainWindow::onLoadedFromSidecar);
     connect(loader_, &SceneLoader::loadedFromStream, this, &MainWindow::onLoadedFromStream);
diff --git a/src/interface/MainWindow.h b/src/interface/MainWindow.h
index e4a491a403..0ca4fc317a 100644
--- a/src/interface/MainWindow.h
+++ b/src/interface/MainWindow.h
@@ -31,6 +31,7 @@ class QTabBar;
 class QToolButton;
 class ViewportWindow;
 class SceneLoader;
+namespace ifcinterface { class ElementRegistry; }
 namespace ifcinterface::panels::models { class ModelsPanelView; }
 namespace ifcinterface::panels::spatial_hierarchy { class SpatialHierarchyPanelView; }
 namespace ifcinterface::panels::properties { class PropertiesPanelView; }
@@ -46,7 +47,7 @@ private:
     void setupChrome();
     void setupRibbon();
     void setupViewport();
-    void setupDocks();
+    void setupPanels();
     void setupStatus();
     void setupLoader();
     QWidget* buildHomeRibbonPage();
@@ -55,7 +56,6 @@ private:
     QWidget* buildPanelsRibbonPage();
     QToolButton* makeRibbonAction(const QString& text, const QString& icon_path);
     QWidget* makeRibbonGroup(const QString& title, const QList<QToolButton*>& buttons);
-    QWidget* makeComingSoonPanel(const QString& title);
     QToolButton* makePanelToggle(const QString& text, QDockWidget* dock);
     void setStatusMessage(const QString& mode, const QString& detail);
     void addFiles(const QStringList& paths);
@@ -78,19 +78,21 @@ private:
     QStackedWidget* ribbon_pages_ = nullptr;
     ViewportWindow* viewport_ = nullptr;
     SceneLoader* loader_ = nullptr;
+    ifcinterface::ElementRegistry* element_registry_ = nullptr;
     QWidget* viewport_container_ = nullptr;
-    QDockWidget* models_dock_ = nullptr;
-    QDockWidget* spatial_dock_ = nullptr;
-    QDockWidget* layers_dock_ = nullptr;
-    QDockWidget* properties_dock_ = nullptr;
-    QDockWidget* stored_views_dock_ = nullptr;
-    QDockWidget* search_dock_ = nullptr;
-    QDockWidget* spreadsheet_dock_ = nullptr;
-    QDockWidget* clash_dock_ = nullptr;
-    QDockWidget* issues_dock_ = nullptr;
-    ifcinterface::panels::models::ModelsPanelView* models_panel_view_ = nullptr;
-    ifcinterface::panels::spatial_hierarchy::SpatialHierarchyPanelView* spatial_panel_view_ = nullptr;
-    ifcinterface::panels::properties::PropertiesPanelView* properties_panel_view_ = nullptr;
+    QDockWidget* models_panel_ = nullptr;
+    QDockWidget* spatial_panel_ = nullptr;
+    QDockWidget* layers_panel_ = nullptr;
+    QDockWidget* properties_panel_ = nullptr;
+    QDockWidget* stored_views_panel_ = nullptr;
+    QDockWidget* search_panel_ = nullptr;
+    QDockWidget* spreadsheet_panel_ = nullptr;
+    QDockWidget* audit_panel_ = nullptr;
+    QDockWidget* clash_panel_ = nullptr;
+    QDockWidget* issues_panel_ = nullptr;
+    ifcinterface::panels::models::ModelsPanelView* models_view_ = nullptr;
+    ifcinterface::panels::spatial_hierarchy::SpatialHierarchyPanelView* spatial_view_ = nullptr;
+    ifcinterface::panels::properties::PropertiesPanelView* properties_view_ = nullptr;
 };
 
 } // namespace ifcinterface::shell
diff --git a/src/interface/components/KeyValueTable.cpp b/src/interface/components/KeyValueTable.cpp
new file mode 100644
index 0000000000..0fbc436b3d
--- /dev/null
+++ b/src/interface/components/KeyValueTable.cpp
@@ -0,0 +1,82 @@
+// This file was generated with the assistance of an AI coding tool.
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#include "KeyValueTable.h"
+
+#include "SvgIcon.h"
+
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QVBoxLayout>
+
+namespace ifcinterface::components {
+
+KeyValueTable::KeyValueTable(const QList<KeyValueTableRow>& rows, QWidget* parent)
+    : QWidget(parent)
+{
+    setObjectName("attributeList");
+
+    auto* layout = new QVBoxLayout(this);
+    layout->setContentsMargins(0, 0, 0, 0);
+    layout->setSpacing(6);
+
+    for (const auto& row_data : rows) {
+        auto* row = new QWidget(this);
+        if (!row_data.trailing_icon_path.isEmpty()) {
+            row->setObjectName("relationshipRow");
+        } else {
+            row->setObjectName("keyValueRow");
+        }
+
+        auto* row_layout = new QHBoxLayout(row);
+        row_layout->setContentsMargins(0, 0, 0, 0);
+        row_layout->setSpacing(12);
+
+        auto* key = new QLabel(row_data.key, row);
+        key->setObjectName("propertyKeyLabel");
+        if (row_data.key_minimum_width > 0) {
+            key->setMinimumWidth(row_data.key_minimum_width);
+        }
+
+        auto* value = new QLabel(row_data.value, row);
+        value->setObjectName(row_data.value_object_name.isEmpty()
+                                 ? "propertyValueLabel"
+                                 : row_data.value_object_name);
+        value->setWordWrap(true);
+        value->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
+
+        row_layout->addWidget(key);
+        row_layout->addWidget(value, 1);
+
+        if (!row_data.trailing_icon_path.isEmpty()) {
+            auto* icon = new QLabel(row);
+            icon->setObjectName(row_data.trailing_icon_object_name.isEmpty()
+                                    ? "relationshipIconLabel"
+                                    : row_data.trailing_icon_object_name);
+            icon->setPixmap(icons::makePanelSvgPixmap(row_data.trailing_icon_path, QSize(14, 14)));
+            icon->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
+            row_layout->addWidget(icon, 0, Qt::AlignRight | Qt::AlignVCenter);
+        }
+
+        layout->addWidget(row);
+    }
+}
+
+} // namespace ifcinterface::components
diff --git a/src/interface/components/KeyValueTable.h b/src/interface/components/KeyValueTable.h
new file mode 100644
index 0000000000..3e1ba10f73
--- /dev/null
+++ b/src/interface/components/KeyValueTable.h
@@ -0,0 +1,47 @@
+// This file was generated with the assistance of an AI coding tool.
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef IFCINTERFACE_COMPONENTS_KEYVALUETABLE_H
+#define IFCINTERFACE_COMPONENTS_KEYVALUETABLE_H
+
+#include <QList>
+#include <QString>
+#include <QWidget>
+
+namespace ifcinterface::components {
+
+struct KeyValueTableRow {
+    QString key;
+    QString value;
+    QString value_object_name = "propertyValueLabel";
+    QString trailing_icon_path;
+    QString trailing_icon_object_name;
+    int key_minimum_width = 0;
+};
+
+class KeyValueTable : public QWidget {
+    Q_OBJECT
+public:
+    explicit KeyValueTable(const QList<KeyValueTableRow>& rows, QWidget* parent = nullptr);
+};
+
+} // namespace ifcinterface::components
+
+#endif
diff --git a/src/interface/components/PanelChrome.cpp b/src/interface/components/Panel.cpp
similarity index 76%
rename from src/interface/components/PanelChrome.cpp
rename to src/interface/components/Panel.cpp
index 4e49219788..3d73c98f6c 100644
--- a/src/interface/components/PanelChrome.cpp
+++ b/src/interface/components/Panel.cpp
@@ -18,8 +18,9 @@
  *                                                                              *
  ********************************************************************************/
 
-#include "PanelChrome.h"
+#include "Panel.h"
 
+#include "Style.h"
 #include "SvgIcon.h"
 
 #include <QDockWidget>
@@ -30,7 +31,7 @@
 #include <QToolButton>
 #include <QVBoxLayout>
 
-namespace ifcinterface::components::panel {
+namespace ifcinterface::components {
 
 namespace {
 
@@ -69,32 +70,31 @@ public:
 
 } // namespace
 
-QDockWidget* makeDock(const QString& title, QWidget* content, QWidget* parent, bool has_settings) {
-    auto* dock = new QDockWidget(title, parent);
-    dock->setObjectName(title);
-    dock->setFeatures(QDockWidget::DockWidgetMovable |
-                      QDockWidget::DockWidgetFloatable |
-                      QDockWidget::DockWidgetClosable);
-    dock->setTitleBarWidget(new DockTitleBar(title, has_settings, dock));
-    dock->setWidget(content);
-    return dock;
-}
-
-QFrame* wrapPanel(QWidget* inner) {
+Panel::Panel(const QString& title, QWidget* content, QWidget* parent, bool has_settings)
+    : QDockWidget(title, parent)
+{
     auto* outer = new QFrame();
     auto* outer_layout = new QVBoxLayout(outer);
-    outer_layout->setContentsMargins(6, 6, 6, 6);
+    outer_layout->setContentsMargins(style::metrics::padding,
+                                     style::metrics::padding,
+                                     style::metrics::padding,
+                                     style::metrics::padding);
     outer_layout->setSpacing(0);
 
     auto* frame = new QFrame(outer);
-    frame->setObjectName("panelFrame");
-    auto* layout = new QVBoxLayout(frame);
-    layout->setContentsMargins(0, 8, 0, 8);
-    layout->setSpacing(0);
-    layout->addWidget(inner);
-
+    frame->setObjectName("panel");
+    auto* frame_layout = new QVBoxLayout(frame);
+    frame_layout->setContentsMargins(0, style::metrics::padding, 0, style::metrics::padding);
+    frame_layout->setSpacing(0);
+    frame_layout->addWidget(content);
     outer_layout->addWidget(frame);
-    return outer;
+
+    setObjectName(title);
+    setFeatures(QDockWidget::DockWidgetMovable |
+                QDockWidget::DockWidgetFloatable |
+                QDockWidget::DockWidgetClosable);
+    setTitleBarWidget(new DockTitleBar(title, has_settings, this));
+    setWidget(outer);
 }
 
-} // namespace ifcinterface::components::panel
+} // namespace ifcinterface::components
diff --git a/src/interface/components/PanelChrome.h b/src/interface/components/Panel.h
similarity index 85%
rename from src/interface/components/PanelChrome.h
rename to src/interface/components/Panel.h
index 806dfeefcd..9739d53552 100644
--- a/src/interface/components/PanelChrome.h
+++ b/src/interface/components/Panel.h
@@ -21,17 +21,19 @@
 #ifndef IFCINTERFACE_COMPONENTS_PANEL_PANELCHROME_H
 #define IFCINTERFACE_COMPONENTS_PANEL_PANELCHROME_H
 
-#include <QString>
+#include <QDockWidget>
 
-class QDockWidget;
-class QFrame;
 class QWidget;
 
-namespace ifcinterface::components::panel {
+namespace ifcinterface::components {
 
-QDockWidget* makeDock(const QString& title, QWidget* content, QWidget* parent, bool has_settings = false);
-QFrame* wrapPanel(QWidget* inner);
+class Panel : public QDockWidget {
+    Q_OBJECT
 
-} // namespace ifcinterface::components::panel
+public:
+    explicit Panel(const QString& title, QWidget* content, QWidget* parent = nullptr, bool has_settings = false);
+};
+
+} // namespace ifcinterface::components
 
 #endif
diff --git a/src/interface/components/Section.cpp b/src/interface/components/Section.cpp
index 34790e7960..a7899b9ce6 100644
--- a/src/interface/components/Section.cpp
+++ b/src/interface/components/Section.cpp
@@ -20,6 +20,7 @@
 
 #include "Section.h"
 
+#include "Style.h"
 #include "SvgIcon.h"
 
 #include <QFrame>
@@ -49,14 +50,14 @@ Section::Section(const QString& title, SectionHeaderMode header_mode,
     setObjectName("panelSection");
     auto* layout = new QVBoxLayout(this);
     layout->setContentsMargins(0, 0, 0, 0);
-    layout->setSpacing(6);
+    layout->setSpacing(style::metrics::section_spacing);
 
     if (header_mode == SectionHeaderMode::Visible) {
         auto* header = new QFrame(this);
         header->setObjectName("panelSectionHeader");
         auto* header_layout = new QHBoxLayout(header);
         header_layout->setContentsMargins(0, 0, 0, 0);
-        header_layout->setSpacing(6);
+        header_layout->setSpacing(style::metrics::section_spacing);
 
         auto* toggle = new QToolButton(header);
         toggle->setObjectName("panelSectionHeaderButton");
@@ -89,7 +90,8 @@ Section::Section(const QString& title, SectionHeaderMode header_mode,
             auto* filter_wrapper = new QWidget(this);
             filter_wrapper->setObjectName("panelSectionFilterWrapper");
             auto* filter_wrapper_layout = new QVBoxLayout(filter_wrapper);
-            filter_wrapper_layout->setContentsMargins(10, 0, 10, 0);
+            filter_wrapper_layout->setContentsMargins(style::metrics::filter_body_padding_x, 0,
+                                                      style::metrics::filter_body_padding_x, 0);
             filter_wrapper_layout->setSpacing(0);
             filter_wrapper_layout->addWidget(filter_field_);
             layout->addWidget(filter_wrapper);
@@ -108,7 +110,8 @@ Section::Section(const QString& title, SectionHeaderMode header_mode,
         auto* filter_wrapper = new QWidget(this);
         filter_wrapper->setObjectName("panelSectionFilterWrapper");
         auto* filter_wrapper_layout = new QVBoxLayout(filter_wrapper);
-        filter_wrapper_layout->setContentsMargins(8, 0, 8, 0);
+        filter_wrapper_layout->setContentsMargins(style::metrics::hidden_filter_body_padding_x, 0,
+                                                  style::metrics::hidden_filter_body_padding_x, 0);
         filter_wrapper_layout->setSpacing(0);
         filter_wrapper_layout->addWidget(filter_field_);
         layout->addWidget(filter_wrapper);
@@ -118,11 +121,14 @@ Section::Section(const QString& title, SectionHeaderMode header_mode,
     body_->setObjectName("panelSectionBody");
     body_layout_ = new QVBoxLayout(body_);
     if (header_mode == SectionHeaderMode::Visible) {
-        body_layout_->setContentsMargins(10, 6, 10, 0);
+        body_layout_->setContentsMargins(style::metrics::section_body_padding_x,
+                                         style::metrics::section_body_padding_top,
+                                         style::metrics::section_body_padding_x, 0);
     } else {
-        body_layout_->setContentsMargins(8, 0, 8, 0);
+        body_layout_->setContentsMargins(style::metrics::hidden_section_body_padding_x, 0,
+                                         style::metrics::hidden_section_body_padding_x, 0);
     }
-    body_layout_->setSpacing(6);
+    body_layout_->setSpacing(style::metrics::section_spacing);
     layout->addWidget(body_);
 }
 
diff --git a/src/interface/components/Style.cpp b/src/interface/components/Style.cpp
new file mode 100644
index 0000000000..9c0b14a924
--- /dev/null
+++ b/src/interface/components/Style.cpp
@@ -0,0 +1,303 @@
+// This file was generated with the assistance of an AI coding tool.
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#include "Style.h"
+
+namespace ifcinterface::components::style {
+
+QString buildAppStyleSheet() {
+    return QString(R"(
+        QMainWindow {
+            background: #26292f;
+        }
+        QWidget {
+            color: #d0d5dd;
+            background: #26292f;
+            selection-background-color: #39b54a;
+            selection-color: #14161a;
+        }
+        QFrame#ribbonShell {
+            background: #2d3138;
+            border-bottom: 1px solid #1b1d22;
+        }
+        QTabBar::tab {
+            background: transparent;
+            color: #8d97a7;
+            padding: 8px 14px;
+            margin-right: 2px;
+            border-bottom: 2px solid transparent;
+        }
+        QTabBar::tab:selected {
+            color: #f2f5fa;
+            border-bottom: 2px solid #39b54a;
+        }
+        QTabBar::tab:hover {
+            color: #ffffff;
+        }
+        QFrame#ribbonBand {
+            background: #31353d;
+            border-top: 1px solid #3b4048;
+        }
+        QFrame#ribbonPage {
+            background: transparent;
+        }
+        QFrame#ribbonGroup {
+            background: transparent;
+            border-right: 1px solid #434852;
+        }
+        QLabel#ribbonGroupLabel {
+            color: #7f8796;
+            font-size: 9px;
+            font-weight: 600;
+            letter-spacing: 0.08em;
+        }
+        QToolButton#ribbonButton {
+            background: transparent;
+            border: none;
+            padding: 6px 4px 4px 4px;
+            font-size: 11px;
+            color: #d6dce6;
+        }
+        QToolButton#ribbonButton:hover {
+            background: #3a3f48;
+        }
+        QToolButton#ribbonButton:pressed {
+            background: #24282f;
+        }
+        QFrame#viewportShell {
+            background: #202329;
+            border-top: 1px solid #1d2025;
+        }
+        QFrame#viewportFrame {
+            background: #1a1d22;
+            border: 1px solid #333942;
+        }
+        QDockWidget {
+            color: #d0d5dd;
+        }
+        QLabel#dockTitleText {
+            color: #dfe4ec;
+            font-size: 10px;
+            font-weight: 700;
+            letter-spacing: 0.08em;
+        }
+        QToolButton#dockTitleButton {
+            color: #8e97a5;
+            border: none;
+            background: transparent;
+        }
+        QToolButton#dockTitleButton:hover {
+            color: #ffffff;
+            background: #353a42;
+        }
+        QFrame#panel {
+            background: #2b2f36;
+            border: 1px solid #3e444e;
+            border-radius: %1px;
+        }
+        QTreeWidget, QListWidget, QTableWidget, QAbstractScrollArea {
+            background: #2b2f36;
+            border: none;
+            outline: none;
+            gridline-color: #333842;
+        }
+        QTreeWidget::viewport, QListWidget::viewport, QTableWidget::viewport {
+            background: #2b2f36;
+        }
+        QHeaderView::section {
+            background: #31353d;
+            color: #b5becc;
+            border: none;
+            border-bottom: 1px solid #434a55;
+            padding: 7px 8px;
+            font-weight: 600;
+        }
+        QTableCornerButton::section {
+            background: #31353d;
+            border: none;
+        }
+        QScrollArea {
+            background: #2b2f36;
+            border: none;
+        }
+        QScrollArea > QWidget > QWidget {
+            background: #2b2f36;
+        }
+        QLineEdit {
+            background: #31353d;
+            border: 1px solid #434a55;
+            border-radius: %1px;
+            padding: %2px %3px;
+            color: #d9dfeb;
+        }
+        QLineEdit:focus {
+            border: 1px solid #5b6472;
+        }
+        QFrame#entityClassCard {
+            background: #26292f;
+            border: 1px solid #404650;
+            border-radius: %1px;
+        }
+        QLabel#entityClassLabel {
+            color: #eef2f8;
+            font-weight: 700;
+            background: transparent;
+        }
+        QLabel#entityTypeLabel {
+            color: #9aa4b3;
+            background: transparent;
+        }
+        QWidget#attributeList {
+            background: transparent;
+        }
+        QTreeView::item, QListView::item, QTableView::item {
+            padding: 4px;
+        }
+        QScrollBar:vertical {
+            background: transparent;
+            width: 10px;
+            margin: 2px 2px 2px 0;
+        }
+        QScrollBar:horizontal {
+            background: transparent;
+            height: 10px;
+            margin: 0 2px 2px 2px;
+        }
+        QScrollBar::handle:vertical, QScrollBar::handle:horizontal {
+            background: #525a67;
+            border-radius: %1px;
+            min-height: 24px;
+            min-width: 24px;
+        }
+        QScrollBar::handle:vertical:hover, QScrollBar::handle:horizontal:hover {
+            background: #697385;
+        }
+        QScrollBar::add-line, QScrollBar::sub-line,
+        QScrollBar::add-page, QScrollBar::sub-page {
+            background: transparent;
+            border: none;
+        }
+        QStatusBar {
+            background: #24272c;
+            border-top: 1px solid #1a1c20;
+        }
+        QStatusBar QLabel {
+            color: #97a1af;
+            background: transparent;
+            border: none;
+            padding: 2px 8px;
+        }
+        QGroupBox {
+            background: transparent;
+            border: 1px solid #404650;
+            border-radius: %1px;
+            margin-top: 10px;
+            padding-top: 10px;
+        }
+        QGroupBox#propertySetCard {
+            background: #26292f;
+            border: 1px solid #404650;
+            border-radius: %1px;
+        }
+        QGroupBox#propertySetCard::title {
+            subcontrol-origin: margin;
+            left: %4px;
+            padding: 0 4px;
+            color: #d5dbe5;
+        }
+        QGroupBox#propertySetCard > QWidget {
+            background: #26292f;
+        }
+        QWidget#panelSection {
+            background: transparent;
+        }
+        QWidget#panelSectionFilterWrapper {
+            background: transparent;
+        }
+        QWidget#relationshipRow {
+            background: transparent;
+        }
+        QLabel#relationshipIconLabel {
+            background: transparent;
+        }
+        QWidget#inspectorPanel {
+            background: #2b2f36;
+        }
+        QFrame#panelSectionHeader {
+            background: #26292f;
+        }
+        QToolButton#panelSectionHeaderButton {
+            background: transparent;
+            border: none;
+            color: #e1e7f0;
+            font-weight: 700;
+            text-align: left;
+            padding: %5px;
+            margin: 0;
+        }
+        QToolButton#panelSectionHeaderButton:hover {
+            color: #ffffff;
+        }
+        QToolButton#panelSectionHeaderButton::menu-indicator {
+            image: none;
+            width: 0;
+        }
+        QToolButton#panelSectionFilterToggle {
+            background: transparent;
+            border: none;
+            padding: %5px;
+        }
+        QToolButton#panelSectionFilterToggle:hover {
+            background: #353a42;
+        }
+        QWidget#panelSectionBody {
+            background: transparent;
+        }
+        QLabel#propertyKeyLabel {
+            color: #9aa4b3;
+            background: transparent;
+        }
+        QLabel#propertyValueLabel {
+            color: #dce2eb;
+            background: transparent;
+        }
+        QLabel#relationshipValueLabel {
+            color: #dce2eb;
+            background: transparent;
+        }
+        QLabel#todoPanelTitle {
+            font-size: 14px;
+            font-weight: 600;
+            color: #e1e6ee;
+            background: transparent;
+        }
+        QLabel#todoPanelBody {
+            color: #8f98a6;
+            background: transparent;
+        }
+    )")
+        .arg(metrics::panel_radius)
+        .arg(metrics::control_padding_y)
+        .arg(metrics::control_padding_x)
+        .arg(metrics::card_padding)
+        .arg(metrics::section_header_padding);
+}
+
+} // namespace ifcinterface::components::style
diff --git a/src/interface/components/Style.h b/src/interface/components/Style.h
new file mode 100644
index 0000000000..8c382fa804
--- /dev/null
+++ b/src/interface/components/Style.h
@@ -0,0 +1,49 @@
+// This file was generated with the assistance of an AI coding tool.
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef IFCINTERFACE_COMPONENTS_STYLE_H
+#define IFCINTERFACE_COMPONENTS_STYLE_H
+
+#include <QString>
+
+namespace ifcinterface::components::style::metrics {
+
+inline constexpr int padding = 6;
+inline constexpr int section_spacing = 6;
+inline constexpr int section_body_padding_x = 10;
+inline constexpr int section_body_padding_top = 6;
+inline constexpr int hidden_section_body_padding_x = 8;
+inline constexpr int section_header_padding = 2;
+inline constexpr int filter_body_padding_x = 10;
+inline constexpr int hidden_filter_body_padding_x = 8;
+inline constexpr int card_padding = 10;
+inline constexpr int control_padding_y = 6;
+inline constexpr int control_padding_x = 8;
+inline constexpr int panel_radius = 3;
+
+} // namespace ifcinterface::components::style::metrics
+
+namespace ifcinterface::components::style {
+
+QString buildAppStyleSheet();
+
+} // namespace ifcinterface::components::style
+
+#endif
diff --git a/src/interface/icons/sidebar-expand.svg b/src/interface/icons/sidebar-expand.svg
new file mode 100644
index 0000000000..6d7695253c
--- /dev/null
+++ b/src/interface/icons/sidebar-expand.svg
@@ -0,0 +1,5 @@
+<svg width="24" stroke-width="1.5" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M19 21L5 21C3.89543 21 3 20.1046 3 19L3 5C3 3.89543 3.89543 3 5 3L19 3C20.1046 3 21 3.89543 21 5L21 19C21 20.1046 20.1046 21 19 21Z" stroke="currentColor"  stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M9.5 21V3" stroke="currentColor"  stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M5.5 10L7.25 12L5.5 14" stroke="currentColor"  stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/src/interface/interface_resources.qrc b/src/interface/interface_resources.qrc
index 9be3928f7d..453e64d9e7 100644
--- a/src/interface/interface_resources.qrc
+++ b/src/interface/interface_resources.qrc
@@ -4,21 +4,6 @@
         <file alias="DMSans-VariableFont_opsz,wght.ttf">../ifctester/webapp/public/fonts/dmsans/DMSans-VariableFont_opsz,wght.ttf</file>
     </qresource>
     <qresource prefix="/icons">
-        <file alias="IFC.png">../bonsai/bonsai/bim/data/icons/IFC.png</file>
-        <file alias="dm_add.png">../bonsai/bonsai/bim/data/icons/dm_add.png</file>
-        <file alias="dm_add_type.png">../bonsai/bonsai/bim/data/icons/dm_add_type.png</file>
-        <file alias="dm_assign.png">../bonsai/bonsai/bim/data/icons/dm_assign.png</file>
-        <file alias="dm_centerline.png">../bonsai/bonsai/bim/data/icons/dm_centerline.png</file>
-        <file alias="dm_connect_mep_elements.png">../bonsai/bonsai/bim/data/icons/dm_connect_mep_elements.png</file>
-        <file alias="dm_decomposition.png">../bonsai/bonsai/bim/data/icons/dm_decomposition.png</file>
-        <file alias="dm_edit_profile.png">../bonsai/bonsai/bim/data/icons/dm_edit_profile.png</file>
-        <file alias="dm_ifc.png">../bonsai/bonsai/bim/data/icons/dm_ifc.png</file>
-        <file alias="dm_perform_quantity_take-off.png">../bonsai/bonsai/bim/data/icons/dm_perform_quantity_take-off.png</file>
-        <file alias="dm_rectangle.png">../bonsai/bonsai/bim/data/icons/dm_rectangle.png</file>
-        <file alias="dm_refresh.png">../bonsai/bonsai/bim/data/icons/dm_refresh.png</file>
-        <file alias="dm_rotate_90.png">../bonsai/bonsai/bim/data/icons/dm_rotate_90.png</file>
-        <file alias="dm_split.png">../bonsai/bonsai/bim/data/icons/dm_split.png</file>
-        <file alias="dm_toggle_openings.png">../bonsai/bonsai/bim/data/icons/dm_toggle_openings.png</file>
         <file alias="plus-square.svg">icons/plus-square.svg</file>
         <file alias="download-square.svg">icons/download-square.svg</file>
         <file alias="cloud-square.svg">icons/cloud-square.svg</file>
@@ -55,5 +40,6 @@
         <file alias="filter.svg">icons/filter.svg</file>
         <file alias="cube-dots.svg">icons/cube-dots.svg</file>
         <file alias="cursor-pointer.svg">icons/cursor-pointer.svg</file>
+        <file alias="sidebar-expand.svg">icons/sidebar-expand.svg</file>
     </qresource>
 </RCC>
diff --git a/src/interface/panels/properties/PropertiesPanelView.cpp b/src/interface/panels/properties/PropertiesPanelView.cpp
index 1b74f40fff..291589762a 100644
--- a/src/interface/panels/properties/PropertiesPanelView.cpp
+++ b/src/interface/panels/properties/PropertiesPanelView.cpp
@@ -22,22 +22,36 @@
 
 #include "PropertiesPanelWidget.h"
 
+#include "../../ElementRegistry.h"
+#include "../../../ifcviewer/ViewportWindow.h"
+
 namespace ifcinterface::panels::properties {
 
-PropertiesPanelView::PropertiesPanelView(PropertiesPanelWidget* widget, QObject* parent)
-    : QObject(parent), widget_(widget)
+PropertiesPanelView::PropertiesPanelView(PropertiesPanelWidget* widget,
+                                         ViewportWindow* viewport,
+                                         ifcinterface::ElementRegistry* registry,
+                                         QObject* parent)
+    : QObject(parent), widget_(widget), registry_(registry)
 {
-    state_.entity = {"IfcWall", "SOLIDWALL"};
-    state_.attributes = {
+    connect(viewport, &ViewportWindow::objectPicked, this, [this](uint32_t object_id) {
+        refresh(object_id);
+    });
+    refresh(0);
+}
+
+void PropertiesPanelView::refresh(uint32_t object_id) {
+    PropertiesPanelState state;
+    state.entity = {"IfcWall", "SOLIDWALL"};
+    state.attributes = {
         {"GlobalId", "2Q$n5SLPP9Q8B7wQKjKfUQ"},
         {"Name", "Core-EXT-204"},
         {"Description", "External load-bearing wall"},
     };
-    state_.relationships = {
+    state.relationships = {
         {"Type", "Basic Wall: Exterior - 200mm"},
         {"Container", "Level 02"},
     };
-    state_.property_sets = {
+    state.property_sets = {
         {"Pset_WallCommon",
          {{"Reference", "Core-EXT-204"},
           {"Status", "Reviewed"},
@@ -53,7 +67,7 @@ PropertiesPanelView::PropertiesPanelView(PropertiesPanelWidget* widget, QObject*
           {"Last Review", "2026-04-30"},
           {"Assigned To", "Design Coordination"}}},
     };
-    state_.quantity_sets = {
+    state.quantity_sets = {
         {"BaseQuantities",
          {{"Length", "6.20 m"},
           {"Height", "3.45 m"},
@@ -65,7 +79,25 @@ PropertiesPanelView::PropertiesPanelView(PropertiesPanelWidget* widget, QObject*
           {"Paint Coverage", "42.78 m2"}}},
     };
 
-    widget_->setState(state_);
+    if (registry_) {
+        auto info = registry_->find(object_id);
+        if (info && !info->type.isEmpty()) {
+            state.entity.entity_class = info->type;
+            if (!state.property_sets.isEmpty() && !state.property_sets[1].rows.isEmpty()) {
+                state.property_sets[1].rows[0].value = info->type;
+            }
+        }
+        if (info && !info->name.isEmpty()) {
+            state.attributes[1].value = info->name;
+            if (state.property_sets.size() > 1 && state.property_sets[1].rows.size() > 1) {
+                state.property_sets[1].rows[1].value = info->name;
+            }
+        }
+        if (info && !info->guid.isEmpty()) {
+            state.attributes[0].value = info->guid;
+        }
+    }
+    widget_->render(state);
 }
 
 } // namespace ifcinterface::panels::properties
diff --git a/src/interface/panels/properties/PropertiesPanelView.h b/src/interface/panels/properties/PropertiesPanelView.h
index a61c393d31..65abe82f4f 100644
--- a/src/interface/panels/properties/PropertiesPanelView.h
+++ b/src/interface/panels/properties/PropertiesPanelView.h
@@ -25,6 +25,8 @@
 
 #include <QObject>
 
+namespace ifcinterface { class ElementRegistry; }
+class ViewportWindow;
 namespace ifcinterface::panels::properties {
 
 class PropertiesPanelWidget;
@@ -32,11 +34,16 @@ class PropertiesPanelWidget;
 class PropertiesPanelView : public QObject {
     Q_OBJECT
 public:
-    explicit PropertiesPanelView(PropertiesPanelWidget* widget, QObject* parent = nullptr);
+    explicit PropertiesPanelView(PropertiesPanelWidget* widget,
+                                 ViewportWindow* viewport,
+                                 ifcinterface::ElementRegistry* registry,
+                                 QObject* parent = nullptr);
 
 private:
+    void refresh(uint32_t object_id);
+
     PropertiesPanelWidget* widget_ = nullptr;
-    PropertiesPanelState state_;
+    ifcinterface::ElementRegistry* registry_ = nullptr;
 };
 
 } // namespace ifcinterface::panels::properties
diff --git a/src/interface/panels/properties/PropertiesPanelWidget.cpp b/src/interface/panels/properties/PropertiesPanelWidget.cpp
index 2c17e4c176..33db92fbb4 100644
--- a/src/interface/panels/properties/PropertiesPanelWidget.cpp
+++ b/src/interface/panels/properties/PropertiesPanelWidget.cpp
@@ -20,10 +20,10 @@
 
 #include "PropertiesPanelWidget.h"
 
+#include "../../components/KeyValueTable.h"
 #include "../../components/Section.h"
 #include "../../components/SvgIcon.h"
 
-#include <QFormLayout>
 #include <QFrame>
 #include <QGroupBox>
 #include <QHBoxLayout>
@@ -36,79 +36,37 @@ namespace {
 QWidget* makePropertySetPanel(const ifcinterface::panels::properties::PropertySet& property_set, QWidget* parent = nullptr) {
     auto* group = new QGroupBox(property_set.title, parent);
     group->setObjectName("propertySetCard");
-    auto* form = new QFormLayout(group);
-    form->setContentsMargins(10, 10, 10, 10);
-    form->setHorizontalSpacing(16);
-    form->setVerticalSpacing(6);
-    form->setFieldGrowthPolicy(QFormLayout::AllNonFixedFieldsGrow);
+    auto* layout = new QVBoxLayout(group);
+    layout->setContentsMargins(10, 10, 10, 10);
+    layout->setSpacing(0);
 
+    QList<ifcinterface::components::KeyValueTableRow> rows;
     for (const auto& row : property_set.rows) {
-        auto* key = new QLabel(row.key, group);
-        key->setObjectName("propertyKeyLabel");
-        auto* value = new QLabel(row.value, group);
-        value->setObjectName("propertyValueLabel");
-        value->setWordWrap(true);
-        form->addRow(key, value);
+        rows.append({row.key, row.value, "propertyValueLabel", "", "", 0});
     }
-
+    layout->addWidget(new ifcinterface::components::KeyValueTable(rows, group));
     return group;
 }
 
 QWidget* makeAttributeList(const QList<ifcinterface::panels::properties::KeyValueRow>& rows, QWidget* parent = nullptr) {
-    auto* panel = new QWidget(parent);
-    panel->setObjectName("attributeList");
-    auto* form = new QFormLayout(panel);
-    form->setContentsMargins(0, 0, 0, 0);
-    form->setHorizontalSpacing(16);
-    form->setVerticalSpacing(6);
-    form->setFieldGrowthPolicy(QFormLayout::AllNonFixedFieldsGrow);
-
+    QList<ifcinterface::components::KeyValueTableRow> table_rows;
     for (const auto& row : rows) {
-        auto* key = new QLabel(row.key, panel);
-        key->setObjectName("propertyKeyLabel");
-        auto* value = new QLabel(row.value, panel);
-        value->setObjectName("propertyValueLabel");
-        value->setWordWrap(true);
-        form->addRow(key, value);
+        table_rows.append({row.key, row.value, "propertyValueLabel", "", "", 0});
     }
-
-    return panel;
+    return new ifcinterface::components::KeyValueTable(table_rows, parent);
 }
 
 QWidget* makeRelationshipList(const QList<ifcinterface::panels::properties::RelationshipRow>& rows, QWidget* parent = nullptr) {
-    auto* panel = new QWidget(parent);
-    panel->setObjectName("attributeList");
-    auto* layout = new QVBoxLayout(panel);
-    layout->setContentsMargins(0, 0, 0, 0);
-    layout->setSpacing(6);
-
+    QList<ifcinterface::components::KeyValueTableRow> table_rows;
     for (const auto& row_data : rows) {
-        auto* row = new QWidget(panel);
-        row->setObjectName("relationshipRow");
-        auto* row_layout = new QHBoxLayout(row);
-        row_layout->setContentsMargins(0, 0, 0, 0);
-        row_layout->setSpacing(12);
-
-        auto* key = new QLabel(row_data.key, row);
-        key->setObjectName("propertyKeyLabel");
-        key->setMinimumWidth(72);
-
-        auto* target = new QLabel(row_data.value, row);
-        target->setObjectName("relationshipValueLabel");
-        target->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
-
-        auto* icon = new QLabel(row);
-        icon->setObjectName("relationshipIconLabel");
-        icon->setPixmap(ifcinterface::components::icons::makePanelSvgPixmap(":/icons/cursor-pointer.svg", QSize(14, 14)));
-        icon->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
-
-        row_layout->addWidget(key);
-        row_layout->addWidget(target, 1);
-        row_layout->addWidget(icon, 0, Qt::AlignRight | Qt::AlignVCenter);
-        layout->addWidget(row);
+        table_rows.append({row_data.key,
+                           row_data.value,
+                           "relationshipValueLabel",
+                           ":/icons/cursor-pointer.svg",
+                           "relationshipIconLabel",
+                           72});
     }
-
-    return panel;
+    return new ifcinterface::components::KeyValueTable(table_rows, parent);
 }
 
 } // namespace
@@ -121,22 +79,28 @@ PropertiesPanelWidget::PropertiesPanelWidget(QWidget* parent)
     auto* root = new QVBoxLayout(this);
     root->setContentsMargins(0, 0, 0, 0);
     root->setSpacing(0);
+
+    scroll_ = new QScrollArea(this);
+    scroll_->setWidgetResizable(true);
+    scroll_->setFrameShape(QFrame::NoFrame);
+
+    content_ = new QWidget(scroll_);
+    content_->setObjectName("inspectorPanel");
+    content_layout_ = new QVBoxLayout(content_);
+    content_layout_->setContentsMargins(0, 0, 0, 0);
+    content_layout_->setSpacing(12);
+
+    scroll_->setWidget(content_);
+    root->addWidget(scroll_);
 }
 
-void PropertiesPanelWidget::setState(const PropertiesPanelState& state) {
-    auto* root = qobject_cast<QVBoxLayout*>(layout());
-    while (auto* item = root->takeAt(0)) {
+void PropertiesPanelWidget::render(const PropertiesPanelState& state) {
+    while (auto* item = content_layout_->takeAt(0)) {
         if (auto* widget = item->widget()) widget->deleteLater();
         delete item;
     }
 
-    auto* content = new QWidget(this);
-    content->setObjectName("inspectorPanel");
-    auto* content_layout = new QVBoxLayout(content);
-    content_layout->setContentsMargins(0, 0, 0, 0);
-    content_layout->setSpacing(12);
-
-    auto* entity_card = new QFrame(content);
+    auto* entity_card = new QFrame(content_);
     entity_card->setObjectName("entityClassCard");
     auto* entity_layout = new QHBoxLayout(entity_card);
     entity_layout->setContentsMargins(10, 8, 10, 8);
@@ -159,37 +123,31 @@ void PropertiesPanelWidget::setState(const PropertiesPanelState& state) {
 
     QList<QWidget*> property_set_widgets;
     for (const auto& property_set : state.property_sets) {
-        property_set_widgets.append(makePropertySetPanel(property_set, content));
+        property_set_widgets.append(makePropertySetPanel(property_set, content_));
     }
 
     QList<QWidget*> quantity_set_widgets;
     for (const auto& property_set : state.quantity_sets) {
-        quantity_set_widgets.append(makePropertySetPanel(property_set, content));
+        quantity_set_widgets.append(makePropertySetPanel(property_set, content_));
     }
 
-    auto* entity_section = new components::Section("", components::SectionHeaderMode::Hidden, "", content);
+    auto* entity_section = new components::Section("", components::SectionHeaderMode::Hidden, "", content_);
     entity_section->addBodyWidget(entity_card);
-    auto* attributes_section = new components::Section("Attributes", components::SectionHeaderMode::Visible, "", content);
-    attributes_section->addBodyWidget(makeAttributeList(state.attributes, content));
-    auto* relationships_section = new components::Section("Relationships", components::SectionHeaderMode::Visible, "", content);
-    relationships_section->addBodyWidget(makeRelationshipList(state.relationships, content));
-    auto* properties_section = new components::Section("Properties", components::SectionHeaderMode::Visible, "Filter properties or sets", content);
+    auto* attributes_section = new components::Section("Attributes", components::SectionHeaderMode::Visible, "", content_);
+    attributes_section->addBodyWidget(makeAttributeList(state.attributes, content_));
+    auto* relationships_section = new components::Section("Relationships", components::SectionHeaderMode::Visible, "", content_);
+    relationships_section->addBodyWidget(makeRelationshipList(state.relationships, content_));
+    auto* properties_section = new components::Section("Properties", components::SectionHeaderMode::Visible, "Filter properties or sets", content_);
     for (auto* widget : property_set_widgets) properties_section->addBodyWidget(widget);
-    auto* quantities_section = new components::Section("Quantities", components::SectionHeaderMode::Visible, "Filter quantities or sets", content);
+    auto* quantities_section = new components::Section("Quantities", components::SectionHeaderMode::Visible, "Filter quantities or sets", content_);
     for (auto* widget : quantity_set_widgets) quantities_section->addBodyWidget(widget);
 
-    content_layout->addWidget(entity_section);
-    content_layout->addWidget(attributes_section);
-    content_layout->addWidget(relationships_section);
-    content_layout->addWidget(properties_section);
-    content_layout->addWidget(quantities_section);
-    content_layout->addStretch(1);
-
-    auto* scroll = new QScrollArea(this);
-    scroll->setWidgetResizable(true);
-    scroll->setFrameShape(QFrame::NoFrame);
-    scroll->setWidget(content);
-    root->addWidget(scroll);
+    content_layout_->addWidget(entity_section);
+    content_layout_->addWidget(attributes_section);
+    content_layout_->addWidget(relationships_section);
+    content_layout_->addWidget(properties_section);
+    content_layout_->addWidget(quantities_section);
+    content_layout_->addStretch(1);
 }
 
 } // namespace ifcinterface::panels::properties
diff --git a/src/interface/panels/properties/PropertiesPanelWidget.h b/src/interface/panels/properties/PropertiesPanelWidget.h
index dcd600cbb7..ea929c22de 100644
--- a/src/interface/panels/properties/PropertiesPanelWidget.h
+++ b/src/interface/panels/properties/PropertiesPanelWidget.h
@@ -25,6 +25,9 @@
 
 #include <QWidget>
 
+class QScrollArea;
+class QVBoxLayout;
+
 namespace ifcinterface::panels::properties {
 
 class PropertiesPanelWidget : public QWidget {
@@ -32,7 +35,12 @@ class PropertiesPanelWidget : public QWidget {
 public:
     explicit PropertiesPanelWidget(QWidget* parent = nullptr);
 
-    void setState(const PropertiesPanelState& state);
+    void render(const PropertiesPanelState& state);
+
+private:
+    QScrollArea* scroll_ = nullptr;
+    QWidget* content_ = nullptr;
+    QVBoxLayout* content_layout_ = nullptr;
 };
 
 } // namespace ifcinterface::panels::properties