:root{--bg: #f4f5f8;--panel: #ffffff;--panel-2: #eef0f4;--border: #d9dce3;--border-strong: #c2c7d2;--text: #171a21;--muted: #6a7280;--accent: #2563eb;--accent-soft: #dbe6ff;--danger: #d33d3d;--ok: #1c9a6a;--paper: #ffffff;--grid: #e9ebf1;--grid-strong: #d6dae4;--ink: #232833;--room-fill: #f0f3f9;--room-stroke: #dfe4ee;--furniture: #ffffff;--furniture-line: #55607a;--glass: #7ba7e8;--radius: 7px;--shadow: 0 1px 2px rgba(16, 20, 30, .06), 0 4px 14px rgba(16, 20, 30, .07);--mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg: #101216;--panel: #191c22;--panel-2: #21252d;--border: #2c313b;--border-strong: #3a4050;--text: #e4e7ee;--muted: #949cab;--accent: #5b93ff;--accent-soft: #1e2c47;--danger: #f06a6a;--ok: #35c795;--paper: #0c0e12;--grid: #181c23;--grid-strong: #242a34;--ink: #cdd4e1;--room-fill: #151920;--room-stroke: #232935;--furniture: #171b22;--furniture-line: #8b95a9;--glass: #4d7ec4;--shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 6px 20px rgba(0, 0, 0, .35)}}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font:14px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-font-smoothing:antialiased;overscroll-behavior:none}button,input,select,textarea{font:inherit;color:inherit}.app{display:flex;flex-direction:column;height:100%}.topbar{display:flex;align-items:center;gap:12px;padding:0 12px;height:48px;flex:0 0 auto;background:var(--panel);border-bottom:1px solid var(--border);z-index:5}.brand{display:flex;align-items:center;gap:8px;font-weight:650;letter-spacing:-.01em;cursor:pointer;background:none;border:0;padding:4px 6px;border-radius:var(--radius)}.brand:hover{background:var(--panel-2)}.brand svg{display:block}.spacer{flex:1}.workspace{display:flex;flex:1;min-height:0}.canvas-wrap{position:relative;flex:1;min-width:0;background:var(--paper)}.canvas-wrap 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