@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap";:root{--bg-canvas:#f0f2f5;--bg-panel:#fff;--border-color:#e5e7eb;--text-primary:#1f2937;--text-secondary:#6b7280;--accent-color:#3b82f6;--accent-hover:#2563eb;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d;--toolbar-height:56px;--sidebar-width:240px;--properties-width:280px;--transition-speed:.2s}*{box-sizing:border-box;margin:0;padding:0}body{color:var(--text-primary);background-color:var(--bg-canvas);-webkit-font-smoothing:antialiased;font-family:Inter,system-ui,-apple-system,sans-serif;overflow:hidden}.app-container{flex-direction:column;width:100vw;height:100vh;display:flex}.top-toolbar{height:var(--toolbar-height);background-color:var(--bg-panel);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-sm);z-index:20;align-items:center;padding:0 16px;display:flex}.main-content{height:calc(100vh - var(--toolbar-height));flex:1;display:flex;position:relative}.sidebar-left,.sidebar-right{background-color:var(--bg-panel);z-index:10;flex-direction:column;height:100%;display:flex}.sidebar-left{width:var(--sidebar-width);border-right:1px solid var(--border-color);box-shadow:2px 0 8px #00000005}.sidebar-right{width:var(--properties-width);border-left:1px solid var(--border-color);box-shadow:-2px 0 8px #00000005}.canvas-container{background-color:var(--bg-canvas);background-image:radial-gradient(var(--border-color) 1px, transparent 1px);cursor:grab;background-size:20px 20px;flex:1;position:relative;overflow:hidden}.canvas-container:active{cursor:grabbing}.icon-btn{color:var(--text-secondary);cursor:pointer;transition:all var(--transition-speed);background:0 0;border:none;border-radius:6px;place-items:center;padding:8px;display:grid}.icon-btn:hover{background-color:var(--border-color);color:var(--text-primary)}.icon-btn.active{background-color:var(--accent-color);color:#fff}.toolbar-group{align-items:center;gap:4px;display:flex}.toolbar-divider{background-color:var(--border-color);width:1px;height:24px;margin:0 12px}.port{border:2px solid var(--accent-color);z-index:10;cursor:crosshair;opacity:0;background-color:#fff;border-radius:50%;width:10px;height:10px;transition:opacity .1s;position:absolute}div:hover>.port,.port.active{opacity:1}.port:hover{background-color:var(--accent-color);transform:scale(1.3)}.svg-overlay{pointer-events:none;z-index:0;width:100%;height:100%;position:absolute;top:0;left:0}.connection-path{fill:none;stroke:var(--text-secondary);stroke-width:2px;transition:stroke .2s}.connection-path:hover{stroke:var(--accent-color);stroke-width:3px}