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diff --git a/js/baba-yaga/web/editor/styles.css b/js/baba-yaga/web/editor/styles.css
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+/* Reset and base styles */
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+body {
+    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+    background-color: #1e1e1e;
+    color: #d4d4d4;
+    line-height: 1.6;
+}
+
+/* Editor container */
+.editor-container {
+    display: flex;
+    flex-direction: column;
+    height: 100vh;
+    overflow: hidden;
+}
+
+/* Header */
+.editor-header {
+    background-color: #2d2d30;
+    border-bottom: 1px solid #3e3e42;
+    padding: 1rem;
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+.editor-header h1 {
+    color: #569cd6;
+    font-size: 1.5rem;
+    font-weight: 600;
+}
+
+.header-controls {
+    display: flex;
+    gap: 0.5rem;
+}
+
+.header-controls button {
+    background-color: #007acc;
+    color: white;
+    border: none;
+    padding: 0.5rem 1rem;
+    border-radius: 4px;
+    cursor: pointer;
+    font-size: 0.9rem;
+    transition: background-color 0.2s;
+}
+
+.header-controls button:hover {
+    background-color: #005a9e;
+}
+
+/* Main editor area */
+.editor-main {
+    display: flex;
+    flex-direction: column;
+    flex: 1;
+    overflow: hidden;
+}
+
+/* Top row: Code editor and AST tree view side by side */
+.top-row {
+    display: flex;
+    flex: 1;
+    overflow: hidden;
+}
+
+/* Code editor panel (50% width) */
+.code-editor-panel {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    border-right: 1px solid #3e3e42;
+    background-color: #1e1e1e;
+}
+
+.code-editor-panel h3 {
+    padding: 1rem;
+    background-color: #2d2d30;
+    border-bottom: 1px solid #3e3e42;
+    color: #d4d4d4;
+}
+
+.code-editor-container {
+    flex: 1;
+    overflow: hidden;
+    display: flex;
+    flex-direction: column;
+    min-height: 0; /* Important for flexbox to work properly */
+}
+
+#code-editor {
+    width: 100%;
+    height: 100%;
+    border: none;
+    outline: none;
+    background-color: #1e1e1e;
+    color: #d4d4d4;
+    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
+    font-size: 14px;
+    line-height: 1.5;
+    padding: 1rem;
+    resize: none;
+}
+
+/* CodeMirror editor height fixes */
+.CodeMirror {
+    height: 100% !important;
+    min-height: 300px;
+    flex: 1;
+}
+
+.CodeMirror-scroll {
+    min-height: 100%;
+}
+
+
+
+/* AST Tree Editor panel (50% width) */
+.ast-editor-panel {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    background-color: #252526;
+    border-left: 1px solid #3e3e42;
+}
+
+.ast-editor-panel h3 {
+    padding: 1rem;
+    background-color: #2d2d30;
+    border-bottom: 1px solid #3e3e42;
+    color: #d4d4d4;
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+}
+
+.tree-editor-container {
+    flex: 1;
+    overflow: auto;
+    padding: 1rem;
+}
+
+/* Bottom row: Output panel */
+.output-panel {
+    height: 200px;
+    display: flex;
+    flex-direction: column;
+    background-color: #1e1e1e;
+    border-top: 1px solid #3e3e42;
+}
+
+/* Tabs */
+.structural-tabs {
+    display: flex;
+    background-color: #2d2d30;
+    border-bottom: 1px solid #3e3e42;
+}
+
+.tab-btn {
+    background-color: transparent;
+    color: #d4d4d4;
+    border: none;
+    padding: 0.75rem 1rem;
+    cursor: pointer;
+    border-bottom: 2px solid transparent;
+    transition: all 0.2s;
+}
+
+.tab-btn:hover {
+    background-color: #3e3e42;
+}
+
+.tab-btn.active {
+    background-color: #007acc;
+    color: white;
+    border-bottom-color: #007acc;
+}
+
+/* Tab content */
+.tab-content {
+    flex: 1;
+    overflow: auto;
+    padding: 1rem;
+}
+
+.tab-pane {
+    display: none;
+}
+
+.tab-pane.active {
+    display: block;
+}
+
+/* Tree view */
+.tree-view-container {
+    height: 100%;
+    overflow: auto;
+}
+
+#tree-view {
+    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
+    font-size: 12px;
+    line-height: 1.4;
+}
+
+.tree-node {
+    margin: 2px 0;
+    padding: 2px 0;
+}
+
+.tree-node-content {
+    display: flex;
+    align-items: center;
+    cursor: pointer;
+    padding: 2px 4px;
+    border-radius: 3px;
+    transition: background-color 0.2s;
+}
+
+.tree-node-content:hover {
+    background-color: #3e3e42;
+}
+
+.tree-node-content.clickable {
+    cursor: pointer;
+}
+
+.tree-node.selected .tree-node-content {
+    background-color: #007acc;
+    color: white;
+}
+
+.tree-node.selected .tree-node-type {
+    color: white;
+}
+
+.tree-node.selected .tree-node-value {
+    color: white;
+}
+
+.tree-node-toggle {
+    margin-right: 8px;
+    color: #569cd6;
+    font-weight: bold;
+    width: 16px;
+    text-align: center;
+}
+
+.tree-node-type {
+    color: #4ec9b0;
+    margin-right: 8px;
+    font-weight: 600;
+}
+
+.tree-node-value {
+    color: #d4d4d4;
+}
+
+.tree-node-children {
+    margin-left: 20px;
+    border-left: 1px solid #3e3e42;
+    padding-left: 10px;
+}
+
+/* Form styles */
+.form-group {
+    margin-bottom: 1rem;
+}
+
+.form-group label {
+    display: block;
+    margin-bottom: 0.5rem;
+    color: #d4d4d4;
+    font-weight: 500;
+}
+
+.form-group input,
+.form-group select {
+    width: 100%;
+    padding: 0.5rem;
+    border: 1px solid #3e3e42;
+    border-radius: 4px;
+    background-color: #1e1e1e;
+    color: #d4d4d4;
+    font-size: 14px;
+}
+
+.form-group input:focus,
+.form-group select:focus {
+    outline: none;
+    border-color: #007acc;
+    box-shadow: 0 0 0 2px rgba(0, 122, 204, 0.2);
+}
+
+/* Parameter list */
+.parameter-list {
+    margin-bottom: 0.5rem;
+}
+
+.parameter-item {
+    display: flex;
+    gap: 0.5rem;
+    margin-bottom: 0.5rem;
+    align-items: center;
+}
+
+.parameter-item input {
+    flex: 1;
+}
+
+.parameter-item select {
+    width: 120px;
+}
+
+.remove-param-btn {
+    background-color: #d73a49;
+    color: white;
+    border: none;
+    padding: 0.25rem 0.5rem;
+    border-radius: 3px;
+    cursor: pointer;
+    font-size: 12px;
+}
+
+.remove-param-btn:hover {
+    background-color: #b31d28;
+}
+
+/* Expression builder */
+.expression-builder {
+    border: 1px solid #3e3e42;
+    border-radius: 4px;
+    padding: 1rem;
+    background-color: #1e1e1e;
+    min-height: 100px;
+}
+
+.expression-item {
+    display: flex;
+    gap: 0.5rem;
+    margin-bottom: 0.5rem;
+    align-items: center;
+}
+
+.expression-type-selector {
+    width: 120px;
+}
+
+.expression-value {
+    flex: 1;
+}
+
+/* When expression editor */
+.when-editor {
+    height: 100%;
+    overflow: auto;
+}
+
+.expression-list,
+.case-list {
+    margin-bottom: 1rem;
+}
+
+.case-item {
+    border: 1px solid #3e3e42;
+    border-radius: 4px;
+    padding: 1rem;
+    margin-bottom: 1rem;
+    background-color: #1e1e1e;
+}
+
+.case-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 1rem;
+}
+
+.case-patterns {
+    margin-bottom: 1rem;
+}
+
+.pattern-item {
+    display: flex;
+    gap: 0.5rem;
+    margin-bottom: 0.5rem;
+    align-items: center;
+}
+
+.remove-case-btn {
+    background-color: #d73a49;
+    color: white;
+    border: none;
+    padding: 0.25rem 0.5rem;
+    border-radius: 3px;
+    cursor: pointer;
+    font-size: 12px;
+}
+
+/* With header editor */
+.with-editor {
+    height: 100%;
+    overflow: auto;
+}
+
+.entry-list {
+    margin-bottom: 1rem;
+}
+
+.entry-item {
+    border: 1px solid #3e3e42;
+    border-radius: 4px;
+    padding: 1rem;
+    margin-bottom: 1rem;
+    background-color: #1e1e1e;
+}
+
+.entry-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 1rem;
+}
+
+.entry-type-selector {
+    width: 120px;
+}
+
+.entry-name {
+    flex: 1;
+    margin-right: 0.5rem;
+}
+
+.remove-entry-btn {
+    background-color: #d73a49;
+    color: white;
+    border: none;
+    padding: 0.25rem 0.5rem;
+    border-radius: 3px;
+    cursor: pointer;
+    font-size: 12px;
+}
+
+/* Output panel */
+.output-panel {
+    height: 200px;
+    background-color: #252526;
+    border-top: 1px solid #3e3e42;
+}
+
+.output-panel h3 {
+    padding: 1rem;
+    background-color: #2d2d30;
+    border-bottom: 1px solid #3e3e42;
+    color: #d4d4d4;
+}
+
+.output-tabs {
+    display: flex;
+    background-color: #2d2d30;
+    border-bottom: 1px solid #3e3e42;
+}
+
+.output-content {
+    flex: 1;
+    overflow: auto;
+    padding: 1rem;
+}
+
+.output-content pre {
+    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
+    font-size: 12px;
+    line-height: 1.4;
+    color: #d4d4d4;
+    white-space: pre-wrap;
+    word-wrap: break-word;
+}
+
+/* Buttons */
+button {
+    background-color: #007acc;
+    color: white;
+    border: none;
+    padding: 0.5rem 1rem;
+    border-radius: 4px;
+    cursor: pointer;
+    font-size: 0.9rem;
+    transition: background-color 0.2s;
+}
+
+button:hover {
+    background-color: #005a9e;
+}
+
+button:disabled {
+    background-color: #3e3e42;
+    color: #6a6a6a;
+    cursor: not-allowed;
+}
+
+/* Utility classes */
+.hidden {
+    display: none !important;
+}
+
+.error {
+    color: #f14c4c;
+}
+
+.success {
+    color: #4ec9b0;
+}
+
+.warning {
+    color: #dcdcaa;
+}
+
+/* Responsive design */
+@media (max-width: 1200px) {
+    .top-row {
+        flex-direction: column;
+    }
+    
+    .code-editor-panel,
+    .ast-editor-panel {
+        flex: none;
+        height: 50%;
+    }
+}
+
+@media (max-width: 768px) {
+    .editor-header {
+        flex-direction: column;
+        gap: 1rem;
+        align-items: stretch;
+    }
+    
+    .header-controls {
+        justify-content: center;
+    }
+    
+    .structural-tabs {
+        flex-wrap: wrap;
+    }
+    
+    .tab-btn {
+        flex: 1;
+        min-width: 80px;
+    }
+}
+
+/* Parse status indicator */
+.parse-status {
+    font-size: 0.8rem;
+    font-weight: normal;
+    margin-left: 0.5rem;
+}
+
+.parse-status.parsing {
+    color: #dcdcaa;
+}
+
+.parse-status.parsed {
+    color: #4ec9b0;
+}
+
+.parse-status.error {
+    color: #f14c4c;
+}
+
+/* Baba Yaga Syntax Highlighting Enhancements */
+.CodeMirror {
+    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
+    font-size: 14px;
+    line-height: 1.5;
+}
+
+/* Custom token colors for Baba Yaga - More specific selectors */
+.CodeMirror.cm-s-baba-yaga .cm-keyword,
+.cm-s-baba-yaga .cm-keyword {
+    color: #c586c0 !important; /* Purple for keywords */
+    font-weight: bold;
+}
+
+.CodeMirror.cm-s-baba-yaga .cm-type,
+.cm-s-baba-yaga .cm-type {
+    color: #4ec9b0 !important; /* Teal for types */
+    font-weight: bold;
+}
+
+.CodeMirror.cm-s-baba-yaga .cm-function,
+.cm-s-baba-yaga .cm-function {
+    color: #dcdcaa !important; /* Yellow for functions */
+    font-weight: bold;
+}
+
+.CodeMirror.cm-s-baba-yaga .cm-builtin,
+.cm-s-baba-yaga .cm-builtin {
+    color: #d7ba7d !important; /* Orange for builtins */
+}
+
+.CodeMirror.cm-s-baba-yaga .cm-operator,
+.cm-s-baba-yaga .cm-operator {
+    color: #d4d4d4 !important; /* White for operators */
+}
+
+.CodeMirror.cm-s-baba-yaga .cm-number,
+.cm-s-baba-yaga .cm-number {
+    color: #b5cea8 !important; /* Green for numbers */
+}
+
+.CodeMirror.cm-s-baba-yaga .cm-string,
+.cm-s-baba-yaga .cm-string {
+    color: #ce9178 !important; /* Red for strings */
+}
+
+.CodeMirror.cm-s-baba-yaga .cm-comment,
+.cm-s-baba-yaga .cm-comment {
+    color: #6a9955 !important; /* Green for comments */
+    font-style: italic;
+}
+
+.CodeMirror.cm-s-baba-yaga .cm-variable,
+.cm-s-baba-yaga .cm-variable {
+    color: #9cdcfe !important; /* Blue for variables */
+}
+
+/* Dark theme adjustments for better contrast */
+.cm-s-baba-yaga.CodeMirror {
+    background-color: #1e1e1e;
+    color: #d4d4d4;
+}
+
+.cm-s-baba-yaga .CodeMirror-gutters {
+    background-color: #2d2d30;
+    border-right: 1px solid #3e3e42;
+}
+
+.cm-s-baba-yaga .CodeMirror-linenumber {
+    color: #858585;
+}
+
+/* Focus state */
+.CodeMirror-focused .CodeMirror-cursor {
+    border-left: 2px solid #007acc;
+}
+
+/* Selection */
+.CodeMirror-selected {
+    background-color: #264f78 !important;
+}
+
+/* Active line highlighting */
+.CodeMirror-activeline-background {
+    background-color: #2d2d30;
+}
+
+/* Add buttons */
+.add-btn {
+    background-color: #007acc;
+    color: white;
+    border: none;
+    padding: 0.25rem 0.5rem;
+    margin-left: 0.5rem;
+    border-radius: 3px;
+    cursor: pointer;
+    font-size: 0.8rem;
+    transition: background-color 0.2s;
+}
+
+.add-btn:hover {
+    background-color: #005a9e;
+}
+
+/* Retry button */
+.retry-btn {
+    background-color: #6a9955;
+    color: white;
+    border: none;
+    padding: 0.25rem 0.5rem;
+    margin-left: 0.5rem;
+    border-radius: 3px;
+    cursor: pointer;
+    font-size: 0.8rem;
+    transition: background-color 0.2s;
+}
+
+.retry-btn:hover {
+    background-color: #4a7a35;
+}
+
+.retry-btn:active {
+    transform: scale(0.95);
+}
+
+/* Inline editing */
+.tree-node-editable {
+    cursor: pointer;
+    padding: 2px 4px;
+    border-radius: 3px;
+    transition: background-color 0.2s;
+}
+
+.tree-node-editable:hover {
+    background-color: #3e3e42;
+}
+
+.tree-node-editing {
+    background-color: #007acc;
+    color: white;
+}
+
+.tree-node-editing input {
+    background: transparent;
+    border: none;
+    color: white;
+    outline: none;
+    font-family: inherit;
+    font-size: inherit;
+    width: 100%;
+}
+
+.tree-node-actions {
+    display: inline-flex;
+    margin-left: 0.5rem;
+    gap: 0.25rem;
+}
+
+.tree-node-action-btn {
+    background-color: #3e3e42;
+    color: #d4d4d4;
+    border: none;
+    padding: 1px 4px;
+    border-radius: 2px;
+    cursor: pointer;
+    font-size: 0.7rem;
+    transition: background-color 0.2s;
+}
+
+.tree-node-action-btn:hover {
+    background-color: #007acc;
+    color: white;
+}
+
+.tree-node-action-btn.delete:hover {
+    background-color: #f14c4c;
+}
+