#canvas{display:block;width:100%;height:100%;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent;touch-action:none;outline:none}#canvas.paint-tool{cursor:crosshair}#canvas.erase-tool{cursor:cell}#canvas.pan-tool{cursor:grab}#canvas.pan-tool:active{cursor:grabbing}.ui-button{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 12px;border:1px solid rgba(255,255,255,.2);border-radius:6px;background:#ffffff1a;color:var(--color-text-primary);font-size:13px;font-weight:500;cursor:pointer;transition:all .15s ease;-webkit-user-select:none;user-select:none;white-space:nowrap}.ui-button:hover:not(:disabled){background:#fff3;border-color:#ffffff4d}.ui-button:disabled{opacity:.35;cursor:not-allowed}.ui-button.active{background:#4a9eff33;border-color:#4a9eff}.ui-button.primary{background:linear-gradient(135deg,#4a9eff,#357abd);border-color:#4a9eff;color:#fff}.ui-button.primary:hover:not(:disabled){background:linear-gradient(135deg,#5aa8ff,#4189cc)}.ui-button.danger:hover:not(:disabled){background:#ff3c3c33;border-color:var(--color-accent-red)}.ui-button.warning.active{background:#ffb02033;border-color:var(--color-active-pause)}.button-group{display:inline-flex}.button-group .ui-button{border-radius:0;border-right-width:0}.button-group .ui-button:first-child{border-top-left-radius:6px;border-bottom-left-radius:6px}.button-group 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6px;border-radius:6px}.topbar-title:hover{background:#ffffff14}.topbar-title-emoji{color:var(--color-slider-thumb)}.topbar-center{display:flex;align-items:center;gap:16px}.topbar-right{display:flex;align-items:center;gap:12px;min-width:160px;justify-content:flex-end}.topbar-fps{color:var(--color-text-secondary);font-size:12px;font-variant-numeric:tabular-nums;min-width:44px;text-align:right}.topbar-speed{display:flex;align-items:center;gap:8px;min-width:140px}.topbar-speed-label{color:var(--color-text-secondary);font-size:12px;font-variant-numeric:tabular-nums;min-width:40px}.topbar-speed .slider{margin-top:0}@media(max-width:900px){.topbar-speed{display:none}}.collapsible-section{margin-bottom:16px;border:1px solid #2a2a35;border-radius:8px;background:#1f1f28;overflow:hidden;box-shadow:0 2px 8px #0000004d}.collapsible-header{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;cursor:pointer;transition:all .2s 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.app-content{margin-top:0;height:100vh;height:100dvh}.canvas-container{flex:1;min-width:0;background:var(--color-canvas);position:relative;overflow:hidden}.webgpu-unavailable{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;height:100dvh;text-align:center;padding:40px;color:var(--color-text-secondary)}.webgpu-unavailable h1{color:var(--color-text-primary);margin-bottom:12px}body{margin:0;padding:0;background:var(--color-canvas)}@media(max-width:768px){.app-content{flex-direction:column}.right-sidebar{width:100%;height:40vh;border-left:none;border-top:1px solid #333}.canvas-container{height:60vh;order:-1}}:root{--color-canvas: #0d0d12;--color-panel: #1a1a22;--color-text-primary: #ffffff;--color-text-secondary: #a3a3b3;--color-accent-red: #ff3c3c;--color-accent-white: #f8f8f8;--color-active-pause: #ffb020;--color-status-running: #00ff88;--color-slider-track: #2e2e3a;--color-slider-thumb: #c8d8ff}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;overscroll-behavior:none}body{overflow:hidden;background:#0a0a0a;color:var(--color-text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}#root{height:100vh;height:100dvh}