:root{--bg:#0f1115;--panel:#161a22;--panel-2:#1c222c;--border:#262d3a;--text:#d8dee9;--muted:#7d8694;--accent:#4cc9f0;--accent-2:#f72585;--ok:#2ecc71;--warn:#f1c40f;--err:#e74c3c;--editor-w:680px;--right-w:280px;--serial-h:200px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}*{box-sizing:border-box}html,body,#app{background:var(--bg);height:100%;color:var(--text);margin:0;padding:0}#app{grid-template-rows:48px 1fr auto;height:100%;display:grid}.topbar{background:var(--panel);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:16px;padding:0 16px;display:flex}.topbar-left{align-items:center;gap:16px;display:flex}.topbar h1{color:var(--text);margin:0;font-size:14px;font-weight:600}.arena-controls{border-left:1px solid var(--border);align-items:center;gap:6px;padding-left:16px;display:flex}.arena-controls label{color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-size:11px}.arena-controls select{background:var(--panel-2);color:var(--text);border:1px solid var(--border);font:inherit;cursor:pointer;border-radius:4px;outline:none;padding:5px 8px;font-size:12px}.arena-controls select:hover{border-color:var(--accent)}.arena-controls button{background:var(--panel-2);color:var(--text);border:1px solid var(--border);cursor:pointer;font:inherit;border-radius:4px;padding:5px 10px;font-size:12px}.arena-controls button:hover{background:var(--border);border-color:var(--accent)}.controls{align-items:center;gap:8px;display:flex}.controls button{background:var(--panel-2);color:var(--text);border:1px solid var(--border);cursor:pointer;font:inherit;border-radius:4px;padding:6px 12px;font-size:12px}.controls button:hover:not(:disabled){background:var(--border);border-color:var(--accent)}.controls button:disabled{opacity:.4;cursor:not-allowed}.controls button.primary{background:#1d3557;border-color:#2a5a8a}.controls button.primary:hover:not(:disabled){border-color:var(--accent);background:#2a5a8a}.controls button.compiling{border-color:var(--warn);color:var(--warn);background:#614c00}.controls button.compiled{border-color:var(--ok);color:var(--ok);background:#14532d}.status{color:var(--muted);min-width:100px;margin-left:8px;font-size:12px}.speed-control{border-left:1px solid var(--border);align-items:center;gap:4px;margin-left:4px;padding-left:8px;display:flex}.speed-control label{color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-size:11px}.speed-control select{background:var(--panel-2);color:var(--text);border:1px solid var(--border);font:inherit;cursor:pointer;border-radius:3px;outline:none;padding:4px 6px;font-size:12px}.speed-control select:hover{border-color:var(--accent)}main{grid-template-columns:var(--editor-w) 1fr var(--right-w);min-height:0;display:grid;overflow:hidden}main.editor-collapsed{--editor-w:38px}.left,.right{background:var(--panel);flex-direction:column;min-height:0;display:flex;overflow:hidden}.left{border-right:1px solid var(--border)}.right{border-left:1px solid var(--border);overflow-y:auto}.center{background:#000;position:relative;overflow:hidden}#scene{width:100%;height:100%}.overlay{color:var(--muted);pointer-events:none;background:#00000080;border-radius:4px;padding:4px 8px;font-size:11px;position:absolute;bottom:8px;left:8px}.hint{color:var(--muted);pointer-events:none;background:#00000080;border-radius:4px;padding:4px 8px;font-size:10px;position:absolute;top:8px;right:8px}.panel-bar{background:var(--panel-2);border-bottom:1px solid var(--border);flex-shrink:0;justify-content:space-between;align-items:center;height:30px;padding:6px 12px;display:flex}.panel-bar-title{text-transform:uppercase;letter-spacing:.05em;color:var(--muted);font-size:11px}.panel-bar-actions{align-items:center;gap:6px;display:flex}.toggle-btn{border:1px solid var(--border);color:var(--muted);cursor:pointer;background:0 0;border-radius:3px;justify-content:center;align-items:center;width:22px;height:22px;padding:0;font-size:12px;line-height:1;display:flex}.toggle-btn:hover{color:var(--accent);border-color:var(--accent)}.text-btn{color:var(--muted);cursor:pointer;font:inherit;background:0 0;border:none;padding:2px 4px;font-size:11px}.text-btn:hover{color:var(--accent)}.text-btn.danger:hover{color:var(--err)}.text-btn:disabled{opacity:.35;cursor:not-allowed}.text-btn:disabled:hover{color:var(--muted)}.sketch-bar{flex:1;align-items:center;gap:8px;min-width:0;display:flex}.sketch-select{background:var(--panel);color:var(--text);border:1px solid var(--border);font:inherit;cursor:pointer;text-overflow:ellipsis;border-radius:3px;outline:none;flex:0 auto;min-width:0;max-width:220px;padding:3px 6px;font-size:11px}.sketch-select:hover{border-color:var(--accent)}main.editor-collapsed .left .sketch-bar{display:none}.panel-title{text-transform:uppercase;letter-spacing:.05em;color:var(--muted);border-bottom:1px solid var(--border);background:var(--panel-2);padding:8px 12px;font-size:11px}#editor{background:var(--bg);flex:1;min-height:0;overflow:hidden}#editor .cm-editor{height:100%;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;line-height:1.55}#editor .cm-editor.cm-focused{outline:none}#editor .cm-scroller{font-family:inherit}#editor .cm-gutters{background:var(--panel-2);border-right:1px solid var(--border);color:var(--muted)}main.editor-collapsed .left .panel-bar-title,main.editor-collapsed .left #editor{display:none}main.editor-collapsed .left .panel-bar{padding:6px}main.editor-collapsed .left #btn-toggle-editor{transform:rotate(180deg)}.props{border-bottom:1px solid var(--border);padding:12px;font-size:11px}.props .empty{color:var(--muted);font-style:italic}.props .prop-row{grid-template-columns:90px 1fr;gap:8px;margin-bottom:4px;display:grid}.props .prop-row .key{color:var(--muted)}.props .prop-row .val{color:var(--text)}.props .prop-title{color:var(--accent);margin-bottom:8px;font-size:12px;font-weight:600}#sensors,#motors{padding:12px;font-size:11px}.sensor-row,.motor-row{grid-template-columns:80px 1fr 50px;align-items:center;gap:8px;margin-bottom:6px;display:grid}.bar{background:var(--bg);border-radius:4px;height:8px;overflow:hidden}.bar-fill{background:var(--accent);height:100%;transition:width 80ms linear}.bar-fill.motor{background:var(--accent-2)}.value{text-align:right;color:var(--muted)}.serial-pane{background:var(--panel);border-top:1px solid var(--border);height:var(--serial-h);flex-direction:column;min-height:32px;display:flex;overflow:hidden}.serial-pane.collapsed{height:32px}.serial-pane.collapsed pre{display:none}.serial-pane.collapsed #btn-toggle-serial{transform:rotate(180deg)}#serial{white-space:pre-wrap;background:var(--bg);color:var(--text);flex:1;margin:0;padding:10px 14px;font-size:11.5px;line-height:1.5;overflow-y:auto}