:root{--c-process: #8a929c;--c-sensor: #2f7bd6;--c-data: #39b54a;--c-power: #e03b3b;--c-ground: #6b5a4b;--c-gpio: #9b51e0;--c-air: #e0a83b;--c-actuator: #ee8a2a;--c-fault: #e03b3b;--bg: #0f1318;--bg-panel: #161b22;--bg-elev: #1c232c;--bg-canvas: #f7f8fa;--line: #2a323d;--text: #e8edf3;--text-dim: #9aa6b2;--text-canvas: #1a2129;--accent: #4a9bf5;--ok: #2fbf71;--warn: #e0a83b;--err: #e85b5b;--radius: 10px;--radius-sm: 6px;--shadow: 0 2px 10px rgba(0, 0, 0, .25);--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace}*{box-sizing:border-box}html,body{margin:0;height:100%}body{font-family:var(--font);background:var(--bg);color:var(--text);font-size:14px;line-height:1.45;overflow:hidden}#app{display:flex;flex-direction:column;height:100vh}.top-host{flex:0 0 auto}.sim-body{flex:1 1 auto;display:flex;min-height:0}.scene-host{flex:1 1 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