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.2s}.toolbar button:hover:not(:disabled){background:#2980b9}.toolbar button:disabled{opacity:.4;cursor:not-allowed}.toolbar button.active{background:#e74c3c}.toolbar button.export-btn{background:#27ae60}.toolbar button.export-btn:hover{background:#219a52}.toolbar button.danger-btn{background:#c0392b}.toolbar button.danger-btn:hover{background:#a93226}.zoom-value{min-width:45px;text-align:center;font-size:12px;font-weight:500}.main-content{display:flex;flex:1;overflow:hidden}.canvas-container{flex:1;overflow:auto;background:#ddd}.canvas{position:relative;min-width:2000px;min-height:1500px;transition:background-color .2s}.connectors-layer{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none}.connectors-layer g{pointer-events:auto}.resize-handle{position:absolute;right:-6px;bottom:-6px;width:12px;height:12px;background:#007bff;border:2px solid white;border-radius:2px;cursor:se-resize}.delete-btn{position:absolute;top:-10px;right:-10px;width:22px;height:22px;border:none;border-radius:50%;background:#e74c3c;color:#fff;font-size:16px;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;line-height:1}.delete-btn:hover{background:#c0392b}.connector-delete-btn{width:24px;height:24px;border:none;border-radius:50%;background:#e74c3c;color:#fff;font-size:16px;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center}.properties-panel{width:260px;background:#ecf0f1;padding:16px;border-left:2px solid #bdc3c7;overflow-y:auto}.properties-panel h3{margin-bottom:12px;color:#2c3e50;font-size:14px;border-bottom:2px solid #3498db;padding-bottom:6px}.properties-panel h4{margin:16px 0 8px;color:#34495e;font-size:12px}.properties-panel .no-selection{color:#7f8c8d;font-style:italic;text-align:center;margin-top:20px;font-size:13px}.shortcuts-help{margin-top:30px;padding:12px;background:#fff;border-radius:6px;border:1px solid #ddd}.shortcuts-help ul{list-style:none;font-size:11px;color:#555}.shortcuts-help li{margin:6px 0}.shortcuts-help kbd{background:#eee;border:1px solid #ccc;border-radius:3px;padding:1px 5px;font-size:10px;font-family:monospace}.property-group{margin-bottom:12px}.property-row{display:flex;gap:10px}.property-group.half{flex:1}.property-group label{display:block;margin-bottom:4px;font-size:12px;font-weight:500;color:#34495e}.property-group input[type=color]{width:100%;height:32px;border:1px solid #bdc3c7;border-radius:4px;cursor:pointer}.property-group input[type=number]{width:100%;padding:6px 8px;border:1px solid #bdc3c7;border-radius:4px;font-size:13px}.property-group textarea{width:100%;padding:8px;border:1px solid #bdc3c7;border-radius:4px;font-size:13px;resize:vertical;font-family:inherit}.property-group select{width:100%;padding:6px 8px;border:1px solid #bdc3c7;border-radius:4px;font-size:13px;cursor:pointer}.duplicate-btn{width:100%;padding:8px;border:none;border-radius:4px;background:#3498db;color:#fff;font-size:13px;cursor:pointer;transition:background .2s}.duplicate-btn:hover{background:#2980b9}.connecting-hint{position:fixed;bottom:20px;left:50%;transform:translate(-50%);background:#2c3e50;color:#fff;padding:12px 24px;border-radius:8px;font-size:14px;box-shadow:0 4px 12px #0000004d;z-index:1000;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0;transform:translate(-50%) translateY(10px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.home-page{min-height:100vh;background:linear-gradient(135deg,#1a1a2e,#16213e,#0f3460);display:flex;align-items:center;justify-content:center;padding:40px 20px;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.home-content{max-width:900px;width:100%}.home-hero{text-align:center;margin-bottom:60px}.home-hero h1{font-size:3rem;color:#fff;margin-bottom:16px;font-weight:700}.tagline{font-size:1.25rem;color:#94a3b8;margin-bottom:32px}.start-btn{padding:16px 48px;font-size:1.1rem;font-weight:600;color:#fff;background:linear-gradient(135deg,#3498db,#2980b9);border:none;border-radius:8px;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #3498db66}.start-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #3498db80}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px;margin-bottom:50px}.feature{background:#ffffff0d;border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:24px;text-align:center;transition:all .3s ease}.feature:hover{background:#ffffff14;transform:translateY(-4px)}.feature-icon{font-size:2.5rem;display:block;margin-bottom:12px}.feature h3{color:#fff;font-size:1.1rem;margin-bottom:8px}.feature p{color:#94a3b8;font-size:.9rem;line-height:1.5}.home-footer{text-align:center;color:#64748b;font-size:.9rem}