:root{--color-sky: rgb(234, 234, 228);--color-ground: rgb(33, 53, 71);--color-ground-stroke: #5a4d3a;--color-grass: #4a9e4a;--color-grass-fill: rgba(74, 158, 74, .15);--color-canvas-bg: #1a1a2e;--color-obj-exit: #d0d000;--color-obj-apple: #e02020;--color-obj-killer: #505050;--color-obj-start: #5090d0;--color-grid-dot: rgba(100, 120, 140, .1);--color-grid-major: rgba(100, 120, 140, .2);--color-selection: #f0962a;--color-selection-fill: rgba(240, 150, 42, .08);--color-error: #ff5555;--color-error-glow: rgba(255, 85, 85, .4);--color-tool-primary: #4488FF;--color-tool-draw-ground: #FF6600;--color-tool-draw-grass: #00CC00;--color-tool-vertex-hover: #FFAA00;--color-tool-vertex-active: #FF8800;--color-tool-import: #44C878;--color-handle: #FFFFFF;--color-bg-primary: #1e1e1e;--color-bg-secondary: rgb(34, 34, 51);--color-bg-tertiary: #2d2d2d;--color-bg-hover: #3a3a3a;--color-bg-active: #264f78;--color-bg-input: #333;--color-border: #3e3e3e;--color-border-focus: #5a8fbf;--color-text-primary: #e0e0e0;--color-text-secondary: #999;--color-accent: #4a9ec9;--color-status-bg: #264f78;--space-xs: 2px;--space-sm: 4px;--space-md: 8px;--space-lg: 12px;--space-xl: 16px;--transition-fast: .12s ease;--transition-normal: .2s ease;--radius-sm: 3px;--radius-md: 5px;--radius-lg: 8px;--toolbar-size: 64px;--menubar-height: 36px;--statusbar-height: 28px;--touch-target-min: 44px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{width:100%;height:100%;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe 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.btn--icon{height:34px;padding:0 8px;font-size:12px}[data-view=text][data-size=large] .btn--icon{height:40px;padding:0 10px;font-size:13px}.btn--icon[draggable=true]{cursor:grab}.btn--icon.btn--dragging{opacity:.3;cursor:grabbing}.btn--icon.btn--drop-indicator:before{content:"";position:absolute;top:-3px;left:4px;right:4px;height:2px;background:var(--color-accent);border-radius:1px;pointer-events:none}.btn--active{background:var(--color-bg-active)}.btn--text{padding:var(--space-xs) var(--space-md);display:flex;align-items:center;gap:4px;font-size:10px;align-self:stretch}[data-size=medium] .btn--text{padding:var(--space-sm) var(--space-lg);font-size:12px;gap:5px}[data-size=large] .btn--text{padding:var(--space-md) var(--space-xl);font-size:13px;gap:6px}[data-view=icons] .btn--text{padding:var(--space-xs) var(--space-sm)}[data-view=icons][data-size=medium] .btn--text{padding:var(--space-sm) var(--space-md)}[data-view=icons][data-size=large] .btn--text{padding:var(--space-md) var(--space-lg)}[data-view=text] .btn--text{padding:var(--space-xs) var(--space-sm)}[data-view=text][data-size=medium] .btn--text{padding:var(--space-sm) var(--space-md)}[data-view=text][data-size=large] .btn--text{padding:var(--space-md) var(--space-lg)}.input,.select{background-color:var(--color-bg-input);color:var(--color-text-primary);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:var(--space-sm) 6px;font-size:12px;font-family:inherit;width:100%;transition:border var(--transition-fast)}.input:focus,.select:focus{background-color:var(--color-accent);color:var(--color-bg-input);border-color:var(--color-border-focus);outline:none}.select option{background-color:var(--color-bg-input);color:var(--color-text-primary)}.select 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