:root{--bg-app:#f8fafc;--bg-panel:#fff;--bg-subtle:#f1f5f9;--bg-hover:#e2e8f0;--bg-canvas:#fff;--text-primary:#0f172a;--text-secondary:#334155;--text-muted:#64748b;--border-color:#e2e8f0;--border-strong:#cbd5e1;--accent:#0284c7;--accent-hover:#0369a1;--accent-soft:#e0f2fe;--accent-border:#7dd3fc;--danger:#dc2626;--danger-soft:#fee2e2;--success:#059669;--shadow-sm:0 1px 2px #0f172a0d;--shadow-md:0 4px 12px #0f172a14;--shadow-lg:0 12px 32px #0f172a24;--radius-sm:6px;--radius-md:8px;--radius-lg:12px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{width:100%;height:100%;color:var(--text-primary);background:var(--bg-app);-webkit-font-smoothing:antialiased;font-family:Be Vietnam Pro,-apple-system,BlinkMacSystemFont,sans-serif;overflow:hidden}button,input,select,textarea{font-family:inherit;font-size:inherit}.studio-shell{-webkit-user-select:none;user-select:none;flex-direction:column;width:100vw;height:100vh;display:flex}.top-header{background:var(--bg-panel);border-bottom:1px solid var(--border-color);z-index:20;justify-content:space-between;align-items:center;gap:10px;height:54px;padding:0 14px;display:flex}.brand-area{align-items:center;gap:10px;min-width:0;display:flex}.brand-logo{color:#fff;background:#0f172a;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:34px;height:34px;font-weight:700;display:flex}.doc-meta{flex-direction:column;min-width:0;display:flex}.doc-title-input{color:var(--text-primary);background:0 0;border:1px solid #0000;border-radius:4px;width:240px;padding:2px 6px;font-size:14px;font-weight:700;transition:border-color .15s,background .15s}.doc-title-input:hover,.doc-title-input:focus{border-color:var(--border-strong);background:var(--bg-subtle);outline:none}.doc-subtitle-row{color:var(--text-muted);align-items:center;gap:6px;padding-left:6px;font-size:11px;display:flex}.toolbar-center{background:var(--bg-subtle);border-radius:var(--radius-md);border:1px solid var(--border-color);align-items:center;gap:4px;padding:4px;display:flex}.toolbar-divider{background:var(--border-strong);width:1px;height:22px;margin:0 4px}.tool-btn{border-radius:var(--radius-sm);height:32px;color:var(--text-secondary);cursor:pointer;white-space:nowrap;background:0 0;border:1px solid #0000;align-items:center;gap:6px;padding:0 10px;font-size:12.5px;font-weight:500;transition:all .12s;display:inline-flex}.tool-btn:hover:not(:disabled){background:var(--bg-panel);color:var(--text-primary);box-shadow:var(--shadow-sm)}.tool-btn:disabled{opacity:.4;cursor:not-allowed}.tool-btn.active{background:var(--accent);color:#fff;box-shadow:var(--shadow-sm);font-weight:600}.tool-btn.icon-only{padding:0 8px}.header-actions{align-items:center;gap:8px;display:flex}.btn-primary{border-radius:var(--radius-sm);border:1px solid var(--accent);background:var(--accent);color:#fff;cursor:pointer;align-items:center;gap:6px;height:34px;padding:0 12px;font-size:12.5px;font-weight:600;transition:background .15s;display:inline-flex}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{border-radius:var(--radius-sm);border:1px solid var(--border-strong);background:var(--bg-panel);height:34px;color:var(--text-secondary);cursor:pointer;align-items:center;gap:6px;padding:0 11px;font-size:12.5px;font-weight:600;transition:all .15s;display:inline-flex}.btn-secondary:hover{background:var(--bg-subtle);color:var(--text-primary)}.workspace-body{flex:1;grid-template-columns:288px 1fr 296px;min-height:0;display:grid;overflow:hidden}.palette-sidebar{background:var(--bg-panel);border-right:1px solid var(--border-color);flex-direction:column;min-height:0;display:flex;overflow:hidden}.palette-search-box{border-bottom:1px solid var(--border-color);padding:10px 12px}.search-input-wrap{align-items:center;display:flex;position:relative}.search-input-wrap svg{color:var(--text-muted);pointer-events:none;position:absolute;left:10px}.search-input{border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--bg-subtle);width:100%;height:34px;color:var(--text-primary);padding:0 28px 0 32px;font-size:12.5px}.search-input:focus{border-color:var(--accent);background:var(--bg-panel);outline:none}.standard-switch-bar{background:var(--bg-subtle);border-bottom:1px solid var(--border-color);color:var(--text-secondary);justify-content:space-between;align-items:center;padding:8px 12px;font-size:11.5px;display:flex}.seg-toggle{background:var(--border-color);border-radius:6px;padding:2px;display:inline-flex}.seg-btn{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:4px;padding:3px 8px;font-size:11px;font-weight:600}.seg-btn.active{background:var(--bg-panel);color:var(--accent);box-shadow:var(--shadow-sm)}.palette-scroll{flex:1;padding:8px 10px 20px;overflow-y:auto}.cat-section{border:1px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-panel);margin-bottom:10px;overflow:hidden}.cat-header{background:var(--bg-subtle);cursor:pointer;text-align:left;border:none;justify-content:space-between;align-items:center;width:100%;padding:8px 10px;display:flex}.cat-header:hover{background:var(--bg-hover)}.cat-title-group{flex-direction:column;gap:1px;display:flex}.cat-title{color:var(--text-primary);font-size:12.5px;font-weight:700}.cat-subtitle{color:var(--text-muted);font-size:10.5px}.cat-badge{background:var(--accent-soft);color:var(--accent-hover);border-radius:4px;padding:2px 6px;font-family:JetBrains Mono,monospace;font-size:10px;font-weight:600}.symbol-grid{grid-template-columns:repeat(2,1fr);gap:6px;padding:8px;display:grid}.symbol-card{border:1px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-panel);cursor:pointer;flex-direction:column;justify-content:space-between;align-items:center;min-height:74px;padding:6px 4px;transition:all .12s;display:flex;position:relative}.symbol-card:hover{border-color:var(--accent);box-shadow:var(--shadow-sm);background:#f0f9ff;transform:translateY(-1px)}.symbol-card.active{border-color:var(--accent);background:var(--accent-soft);box-shadow:0 0 0 2px #0284c733}.symbol-shortcut{background:var(--bg-subtle);color:var(--text-muted);border:1px solid var(--border-color);border-radius:3px;padding:1px 4px;font-family:JetBrains Mono,monospace;font-size:9.5px;font-weight:600;position:absolute;top:4px;right:4px}.symbol-preview-svg{width:72px;height:40px;overflow:visible}.symbol-name{color:var(--text-secondary);text-align:center;margin-top:3px;font-size:11px;font-weight:500;line-height:1.25}.canvas-stage{background:var(--bg-canvas);flex-direction:column;width:100%;height:100%;display:flex;position:relative;overflow:hidden}.canvas-Banner{color:#fff;box-shadow:var(--shadow-md);z-index:10;pointer-events:none;background:#0f172ae0;border-radius:999px;align-items:center;gap:8px;padding:6px 14px;font-size:12px;font-weight:500;display:flex;position:absolute;top:12px;left:50%;transform:translate(-50%)}.schematic-svg{touch-action:none;width:100%;height:100%;display:block}.schematic-svg.cursor-pan{cursor:grab}.schematic-svg.cursor-panning{cursor:grabbing}.schematic-svg.cursor-crosshair{cursor:crosshair}.canvas-floating-controls{border:1px solid var(--border-strong);border-radius:var(--radius-md);box-shadow:var(--shadow-md);z-index:10;background:#fffffff2;align-items:center;gap:6px;padding:4px 8px;display:flex;position:absolute;bottom:14px;left:14px}.zoom-readout{text-align:center;min-width:46px;color:var(--text-secondary);font-family:JetBrains Mono,monospace;font-size:11.5px;font-weight:600}.canvas-hint-pill{border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-muted);box-shadow:var(--shadow-sm);background:#fffffff0;align-items:center;gap:10px;padding:6px 12px;font-size:11.5px;display:flex;position:absolute;bottom:14px;right:14px}.kbd-tag{background:var(--bg-subtle);border:1px solid var(--border-strong);color:var(--text-secondary);border-radius:4px;padding:1px 5px;font-family:JetBrains Mono,monospace;font-size:10.5px}.inspector-sidebar{background:var(--bg-panel);border-left:1px solid var(--border-color);flex-direction:column;min-height:0;display:flex;overflow-y:auto}.inspector-section{border-bottom:1px solid var(--border-color);padding:14px}.inspector-heading{text-transform:uppercase;letter-spacing:.04em;color:var(--text-muted);justify-content:space-between;align-items:center;margin-bottom:10px;font-size:12px;font-weight:700;display:flex}.prop-row{flex-direction:column;gap:5px;margin-bottom:11px;display:flex}.prop-row:last-child{margin-bottom:0}.prop-label{color:var(--text-secondary);justify-content:space-between;align-items:center;font-size:12px;font-weight:600;display:flex}.prop-input,.prop-select{border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--bg-panel);width:100%;height:34px;color:var(--text-primary);padding:0 10px;font-size:12.5px}.prop-input:focus,.prop-select:focus{border-color:var(--accent);outline:none}.prop-grid-2{grid-template-columns:1fr 1fr;gap:8px;display:grid}.quick-chip-bar{flex-wrap:wrap;gap:4px;margin-top:4px;display:flex}.math-chip{border:1px solid var(--border-strong);background:var(--bg-subtle);color:var(--text-secondary);cursor:pointer;border-radius:4px;padding:2px 7px;font-family:JetBrains Mono,monospace;font-size:11px}.math-chip:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}.color-swatch-row{align-items:center;gap:6px;display:flex}.color-dot{cursor:pointer;border:2px solid #0000;border-radius:50%;width:24px;height:24px;transition:transform .1s}.color-dot.active{border-color:var(--text-primary);transform:scale(1.12)}.modal-backdrop{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:100;background:#0f172a73;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal-card{background:var(--bg-panel);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);border:1px solid var(--border-color);flex-direction:column;width:100%;max-width:720px;max-height:86vh;display:flex;overflow:hidden}.modal-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.modal-title{color:var(--text-primary);font-size:16px;font-weight:700}.modal-body{padding:18px 20px;overflow-y:auto}.template-list{grid-template-columns:repeat(2,1fr);gap:12px;display:grid}.template-card{border:1px solid var(--border-strong);border-radius:var(--radius-md);background:var(--bg-panel);cursor:pointer;flex-direction:column;justify-content:space-between;gap:8px;padding:14px;transition:all .15s;display:flex}.template-card:hover{border-color:var(--accent);box-shadow:var(--shadow-md);background:#f8fafc}.template-subject-badge{background:var(--accent-soft);color:var(--accent-hover);border-radius:99px;align-self:flex-start;padding:2px 8px;font-size:11px;font-weight:600}.code-box{color:#f8fafc;border-radius:var(--radius-md);border:1px solid var(--border-strong);resize:vertical;background:#0f172a;width:100%;height:240px;padding:12px;font-family:JetBrains Mono,monospace;font-size:12px}.toast-banner{color:#fff;border-radius:var(--radius-md);box-shadow:var(--shadow-lg);z-index:150;background:#0f172a;padding:10px 16px;font-size:13px;font-weight:500;position:fixed;top:66px;right:20px}