:root,[data-theme=light]{--bg: #f5f5f5;--surface: #ffffff;--panel: #f0f0f0;--accent: #2563eb;--accent-hover: #1d4ed8;--danger: #ef4444;--text: #1a1a1a;--text-secondary: #555;--text-muted: #888;--border: #e0e0e0;--input-bg: #fff;--canvas-bg: #fafafa;--grid-color: #e8e8e8;--shadow: 0 1px 3px rgba(0,0,0,.08);--node-sub: #3b82f6;--node-pond: #22c55e;--node-reach: #f59e0b;--node-junc: #8b5cf6;--link-color: #94a3b8;--node-label: #fff;--node-type-label: rgba(255,255,255,.6);--port-fill: #fff;--selected-stroke: #ef4444;--selected-glow: rgba(239,68,68,.4)}[data-theme=dark]{--bg: #111;--surface: #1a1a1a;--panel: #222;--accent: #3b82f6;--accent-hover: #60a5fa;--danger: #f87171;--text: #e5e5e5;--text-secondary: #aaa;--text-muted: #666;--border: #333;--input-bg: #2a2a2a;--canvas-bg: #141414;--grid-color: #1e1e1e;--shadow: 0 1px 3px rgba(0,0,0,.3);--node-sub: #4a9eff;--node-pond: #34d399;--node-reach: #fbbf24;--node-junc: #a78bfa;--link-color: #64748b;--node-label: #fff;--node-type-label: rgba(255,255,255,.5);--port-fill: #fff;--selected-stroke: #ef4444;--selected-glow: rgba(239,68,68,.5)}*{margin:0;padding:0;box-sizing:border-box}html,body,#root{width:100%;height:100%;overflow:hidden;font-family:Inter,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text)}.app-layout{display:grid;grid-template-columns:200px 1fr 300px;grid-template-rows:44px 1fr 28px;height:100vh;gap:1px;background:var(--border)}.toolbar{grid-column:1 / -1;background:var(--surface);display:flex;align-items:center;padding:0 12px;gap:8px;border-bottom:1px solid var(--border)}.toolbar h1{font-size:14px;font-weight:700;color:var(--text);margin-right:16px;letter-spacing:-.02em;flex-shrink:0}.toolbar button,.toolbar a.btn{background:transparent;color:var(--text-secondary);border:1px solid var(--border);border-radius:5px;padding:5px 10px;cursor:pointer;font-size:12px;transition:all .15s;text-decoration:none}.toolbar button:hover,.toolbar a.btn:hover{background:var(--panel);color:var(--text);border-color:var(--text-muted)}.btn-primary{background:var(--accent)!important;color:#fff!important;border-color:var(--accent)!important}.btn-primary:hover{background:var(--accent-hover)!important}.btn-danger{margin-top:12px;width:100%;padding:6px;background:var(--danger)!important;color:#fff!important;border:none!important;border-radius:4px;cursor:pointer;font-size:12px}.btn-danger:hover{opacity:.9}.theme-toggle{background:transparent!important;border:none!important;font-size:16px!important;padding:4px 6px!important;cursor:pointer;opacity:.6;transition:opacity .15s}.theme-toggle:hover{opacity:1;background:transparent!important}.feedback-btn{display:inline-flex;align-items:center;gap:4px;background:transparent;color:var(--text-muted);border:1px dashed var(--border);border-radius:5px;padding:5px 10px;font-size:12px;text-decoration:none;cursor:pointer;transition:all .15s}.feedback-btn:hover{color:var(--accent);border-color:var(--accent);background:var(--panel)}.stencil-panel{background:var(--surface);padding:12px;overflow-y:auto;border-right:1px solid var(--border)}.stencil-panel h3{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);margin-bottom:8px;font-weight:600}.stencil-item{display:flex;align-items:center;gap:8px;padding:7px 10px;margin-bottom:3px;border-radius:6px;cursor:grab;background:var(--panel);border:1px solid transparent;font-size:12px;color:var(--text-secondary);transition:all .15s}.stencil-item:hover{border-color:var(--border);color:var(--text);background:var(--input-bg)}.stencil-item .icon{width:22px;height:22px;border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:#fff}.diagram-area{background:var(--canvas-bg);position:relative;overflow:hidden;cursor:grab}.diagram-area.panning{cursor:grabbing}.diagram-area svg{width:100%;height:100%}.node-group{cursor:pointer}.node-group:hover .node-body{filter:brightness(1.1)}.node-body{stroke-width:2;transition:filter .15s}.node-body.selected{stroke:var(--selected-stroke);stroke-width:3;filter:drop-shadow(0 0 6px var(--selected-glow))}.node-label{fill:var(--node-label);font-size:11px;font-family:inherit;text-anchor:middle;pointer-events:none;-webkit-user-select:none;user-select:none}.node-type-label{fill:var(--node-type-label);font-size:9px;font-family:inherit;text-anchor:middle;pointer-events:none;-webkit-user-select:none;user-select:none}.node-port{cursor:crosshair;transition:r .15s}.node-port:hover{r:7}.flow-link{stroke:var(--link-color);stroke-width:2;fill:none;cursor:pointer}.flow-link:hover,.flow-link.selected{stroke:var(--selected-stroke);stroke-width:3}.link-arrow{fill:var(--link-color)}.property-panel{background:var(--surface);padding:12px;overflow-y:auto;border-left:1px solid var(--border)}.property-panel h3{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);margin-bottom:10px;font-weight:600}.property-panel .empty{color:var(--text-muted);font-size:12px;text-align:center;margin-top:40px}.prop-group{margin-bottom:14px}.prop-group label{display:block;font-size:10px;color:var(--text-muted);margin-bottom:3px;text-transform:uppercase;letter-spacing:.05em;font-weight:500}.prop-group input,.prop-group select{width:100%;background:var(--input-bg);color:var(--text);border:1px solid var(--border);border-radius:5px;padding:6px 8px;font-size:12px;transition:border-color .15s}.prop-group input:focus,.prop-group select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px #2563eb26}.prop-row{display:flex;gap:8px}.prop-row .prop-group{flex:1}.result-badge{display:inline-block;background:var(--panel);border:1px solid var(--border);border-radius:5px;padding:3px 8px;font-size:11px;margin-bottom:4px;margin-right:4px}.result-badge .value{font-weight:600;color:var(--accent)}.status-bar{grid-column:1 / -1;background:var(--surface);display:flex;align-items:center;padding:0 12px;font-size:11px;color:var(--text-muted);gap:16px;border-top:1px solid var(--border)}.sub-areas-table{width:100%;font-size:11px;border-collapse:collapse;margin-top:4px}.sub-areas-table th,.sub-areas-table td{padding:3px 4px;border:1px solid var(--border);text-align:left}.sub-areas-table th{background:var(--panel);color:var(--text-muted);font-weight:500;font-size:10px}.sub-areas-table input{width:100%;background:transparent;border:none;color:var(--text);font-size:11px;padding:2px}.sub-areas-table select{background:transparent;color:var(--text);border:none;font-size:11px}.toolbar-spacer{flex:1}.toast-container{position:fixed;bottom:40px;right:16px;z-index:9999;display:flex;flex-direction:column;gap:8px;max-width:360px}.toast{padding:10px 16px;border-radius:6px;font-size:13px;color:#fff;cursor:pointer;box-shadow:0 4px 12px #0003;animation:toast-in .25s ease-out}.toast-success{background:#16a34a}.toast-error{background:#dc2626}.toast-warning{background:#d97706}@keyframes toast-in{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background:var(--surface, #fff);border-radius:12px;padding:24px;max-width:480px;width:90%;max-height:90vh;overflow-y:auto;box-shadow:0 8px 32px #0003;color:var(--text, #212529)}.modal-content h3{margin:0 0 16px;font-size:18px}.modal-content label{display:block;font-size:13px;font-weight:500;margin:12px 0 4px;color:var(--text2, #6c757d)}.modal-content textarea,.modal-content input,.modal-content select{width:100%;padding:8px 10px;border:1px solid var(--border, #dee2e6);border-radius:6px;font-size:13px;background:var(--bg, #f8f9fa);color:var(--text, #212529);font-family:inherit;box-sizing:border-box}.modal-content textarea:focus,.modal-content input:focus,.modal-content select:focus{outline:none;border-color:var(--accent, #0d6efd)}.radio-group{display:flex;gap:8px}.radio-group label{padding:6px 12px;border:1px solid var(--border, #dee2e6);border-radius:6px;cursor:pointer;font-size:12px;display:flex;align-items:center;gap:4px;margin:0;color:var(--text, #212529)}.radio-group label.active{border-color:var(--accent, #0d6efd);background:color-mix(in srgb,var(--accent, #0d6efd) 10%,transparent)}.radio-group input{display:none}.modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:16px}.modal-actions button{padding:8px 20px;border-radius:6px;border:1px solid var(--border);cursor:pointer;font-size:13px;font-weight:500;background:var(--surface);color:var(--text);transition:all .15s}.modal-actions button:hover{background:var(--panel, #f0f0f0);border-color:var(--text-muted, #888)}.modal-actions .btn-primary{background:var(--accent, #2563eb);color:#fff;border-color:var(--accent, #2563eb)}.modal-actions .btn-primary:hover{opacity:.9}.modal-actions .btn-primary:disabled{opacity:.5;cursor:not-allowed}.github-link{font-size:11px;color:var(--text2, #6c757d);text-decoration:none;padding:0 4px}.github-link:hover{text-decoration:underline}