:root{--bg: #0f1117;--surface: #1a1d27;--border: #2a2d3a;--text: #e4e4e7;--text-muted: #71717a;--accent: #6366f1;--accent-hover: #818cf8;--error: #ef4444;--warning: #f59e0b;--success: #22c55e;--font-mono: "SF Mono", "Fira Code", "Cascadia Code", monospace;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-sans);background:var(--bg);color:var(--text);height:100vh;display:flex;flex-direction:column;overflow:hidden}.header{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;border-bottom:1px solid var(--border);flex-shrink:0}.logo{font-size:16px;font-weight:600;letter-spacing:-.02em}.badge{font-size:11px;font-weight:500;background:var(--accent);color:#fff;padding:2px 6px;border-radius:4px;vertical-align:middle;margin-left:4px}.toolbar{display:flex;gap:8px;align-items:center}.toolbar select,.toolbar button{background:var(--surface);color:var(--text);border:1px solid var(--border);padding:4px 10px;border-radius:4px;font-size:13px;cursor:pointer}.toolbar button:hover{border-color:var(--accent)}.panels{display:grid;grid-template-columns:1fr 1fr 1fr;flex:1;overflow:hidden}.panel{display:flex;flex-direction:column;border-right:1px solid var(--border);overflow:hidden}.panel:last-child{border-right:none}.panel-header{display:flex;justify-content:space-between;align-items:center;padding:6px 12px;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);border-bottom:1px solid var(--border)}.size-badge{font-size:11px;font-weight:500;color:var(--accent)}.panel-tabs{display:flex;border-bottom:1px solid var(--border);flex-shrink:0}.tab{background:none;border:none;color:var(--text-muted);font-size:12px;font-weight:500;padding:8px 14px;cursor:pointer;border-bottom:2px solid transparent}.tab.active{color:var(--text);border-bottom-color:var(--accent)}.tab:hover{color:var(--text)}.tab-content{display:none;flex:1;overflow:auto}.tab-content.active{display:flex;flex-direction:column}#ir-editor,#prompt-editor{flex:1;background:var(--surface);color:var(--text);border:none;padding:12px;font-family:var(--font-mono);font-size:13px;line-height:1.5;resize:none;outline:none;tab-size:2}#prompt-editor{font-family:var(--font-sans);font-size:14px}.hint{padding:12px;font-size:12px;color:var(--text-muted)}#preview-frame{flex:1;border:none;background:#fff}#validation-results{padding:12px;font-size:13px;overflow:auto;flex:1}.diag{padding:6px 8px;margin-bottom:4px;border-radius:4px;font-family:var(--font-mono);font-size:12px;line-height:1.4}.diag-error{background:#ef44441a;border-left:3px solid var(--error)}.diag-warning{background:#f59e0b1a;border-left:3px solid var(--warning)}.diag-code{font-weight:600;margin-right:6px}.diag-path{color:var(--text-muted);font-size:11px;display:block;margin-top:2px}.diag-hint{color:var(--accent);font-size:11px;display:block;margin-top:2px}.valid-badge{display:inline-flex;align-items:center;gap:4px;color:var(--success);font-weight:600}#html-output{padding:12px;font-family:var(--font-mono);font-size:12px;line-height:1.5;overflow:auto;white-space:pre-wrap;word-break:break-all;flex:1}#inspector-tree{padding:12px;font-family:var(--font-mono);font-size:12px;overflow:auto;flex:1}.tree-node{padding-left:16px}.tree-type{color:var(--accent);font-weight:600}.tree-id{color:var(--text-muted)}.tree-count{color:var(--warning);font-size:11px}.examples{display:flex;align-items:center;gap:8px;padding:6px 16px;border-top:1px solid var(--border);flex-shrink:0}.examples-label{font-size:12px;color:var(--text-muted);font-weight:500}.example-btn{background:var(--surface);color:var(--text);border:1px solid var(--border);padding:3px 10px;border-radius:4px;font-size:12px;cursor:pointer}.example-btn:hover{border-color:var(--accent);color:var(--accent)}@media(max-width:900px){.panels{grid-template-columns:1fr;grid-template-rows:1fr 1fr 1fr}.panel{border-right:none;border-bottom:1px solid var(--border)}}