:root{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--bg-card: #1e293b;--bg-input: #334155;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--text-label: #cbd5e1;--accent-primary: #3b82f6;--accent-secondary: #8b5cf6;--accent-success: #22c55e;--accent-warning: #f59e0b;--accent-danger: #ef4444;--border-color: #475569;--border-light: #334155;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px;line-height:1.6;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*,*:before,*:after{box-sizing:border-box}body{margin:0;padding:0;background:var(--bg-primary);color:var(--text-primary);min-height:100vh}#root{min-height:100vh}h1,h2,h3,h4,h5,h6{color:var(--text-primary);margin-top:0;margin-bottom:.5em;font-weight:600;line-height:1.3}h2{font-size:1.5rem;color:#e2e8f0;border-bottom:2px solid var(--accent-primary);padding-bottom:8px;margin-bottom:16px}h3{font-size:1.1rem;color:#cbd5e1;margin-bottom:12px}p{color:var(--text-secondary);margin-bottom:1em}a{color:var(--accent-primary);text-decoration:none}a:hover{color:#60a5fa;text-decoration:underline}.module{padding:20px;max-width:1200px;margin:0 auto}.module h2{color:#e2e8f0;font-size:1.5rem;margin-bottom:16px;border-bottom:2px solid var(--accent-primary);padding-bottom:8px}.module p{color:var(--text-secondary);margin-bottom:16px}.controls{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:20px;align-items:flex-end;padding:16px;background:var(--bg-secondary);border-radius:8px;border:1px solid var(--border-light)}.controls label{display:flex;flex-direction:column;gap:6px;font-size:.85rem;color:var(--text-label);font-weight:500}.controls input[type=range]{width:150px;accent-color:var(--accent-primary)}.controls input[type=number],.controls input[type=text],.controls select{padding:8px 12px;border:1px solid var(--border-color);border-radius:6px;font-size:.9rem;background:var(--bg-input);color:var(--text-primary);min-width:100px}.controls input[type=number]:focus,.controls input[type=text]:focus,.controls select:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #3b82f633}.control-group{display:flex;flex-direction:column;gap:6px}.control-group label{font-size:.8rem;font-weight:600;color:var(--text-label)}.control-group input,.control-group select{padding:8px 12px;border:1px solid var(--border-color);border-radius:6px;font-size:.9rem;background:var(--bg-input);color:var(--text-primary)}.results-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;margin-bottom:20px}.result-card{background:var(--bg-card);border:1px solid var(--border-light);border-radius:8px;padding:16px;display:flex;flex-direction:column;gap:8px}.result-card .label{font-size:.8rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;font-weight:600}.result-card .value{font-size:1.25rem;font-weight:600;color:var(--text-primary);font-family:SF Mono,Monaco,Consolas,monospace}.result-box{background:var(--bg-card);border:1px solid var(--border-light);border-radius:8px;padding:16px;margin-top:16px}.result-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}.result-item{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;background:var(--bg-tertiary);border-radius:6px;border:1px solid var(--border-light)}.result-label{font-weight:600;color:var(--text-secondary);font-size:.85rem}.result-value{font-family:SF Mono,Monaco,Consolas,monospace;color:var(--text-primary);font-weight:500;font-size:.95rem}.theory{background:var(--bg-secondary);border:1px solid var(--border-light);border-left:4px solid var(--accent-primary);border-radius:0 8px 8px 0;padding:16px 20px;margin-top:20px}.theory h3{color:var(--text-primary);margin-top:0;margin-bottom:12px;font-size:1rem}.theory p{color:var(--text-secondary);font-size:.9rem;line-height:1.6;margin-bottom:8px}.theory p:last-child{margin-bottom:0}.theory strong{color:var(--text-primary)}table{width:100%;border-collapse:collapse;background:var(--bg-card);border-radius:8px;overflow:hidden;margin:16px 0}th{background:var(--bg-tertiary);color:var(--text-primary);font-weight:600;text-align:left;padding:12px 16px;border-bottom:2px solid var(--border-color)}td{padding:10px 16px;border-bottom:1px solid var(--border-light);color:var(--text-secondary)}tr:last-child td{border-bottom:none}tr:nth-child(2n){background:#ffffff05}.badge{display:inline-block;padding:2px 8px;font-size:.75rem;font-weight:600;border-radius:4px;margin-left:8px;background:var(--accent-success);color:#fff}button{padding:8px 16px;border-radius:6px;border:1px solid var(--border-color);background:var(--bg-tertiary);color:var(--text-primary);font-size:.9rem;font-weight:500;cursor:pointer;transition:all .15s ease}button:hover{background:var(--bg-input);border-color:var(--accent-primary)}button:focus{outline:none;box-shadow:0 0 0 3px #3b82f64d}.js-plotly-plot .plotly .main-svg{background:transparent!important}.js-plotly-plot .plotly .bg{fill:var(--bg-secondary)!important}svg text{fill:var(--text-secondary)!important}svg text[fill="#333"],svg text[fill="#666"],svg text[fill=black],svg text[fill="#000"]{fill:#e2e8f0!important}svg rect[fill="#E3F2FD"],svg rect[fill="#FFF3E0"],svg rect[fill="#FFEBEE"],svg rect[fill="#f9f9f9"],svg rect[fill="#fff"],svg rect[fill=white]{fill:#334155!important;stroke:#475569!important}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--border-color)}*:focus-visible{outline:2px solid var(--accent-primary);outline-offset:2px}code{font-family:SF Mono,Monaco,Consolas,monospace;background:var(--bg-tertiary);padding:2px 6px;border-radius:4px;font-size:.9em;color:#fbbf24}.loading{display:flex;align-items:center;justify-content:center;height:100vh;font-size:1.2rem;color:var(--text-secondary)}.module-selector{width:260px;background:linear-gradient(180deg,#1e293b,#0f172a);padding:16px 12px;overflow-y:auto;flex-shrink:0;border-right:1px solid #334155}.chapter-group{margin-bottom:20px}.chapter-label{color:#64748b;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:1.5px;padding:8px 12px 4px;display:block}.module-btn{display:block;width:100%;text-align:left;padding:10px 14px;border:none;background:transparent;color:#94a3b8;font-size:.85rem;cursor:pointer;border-radius:6px;transition:all .15s ease;margin:2px 0}.module-btn:hover{background:#3b82f61a;color:#e2e8f0}.module-btn.active{background:linear-gradient(90deg,#3b82f633,#3b82f61a);color:#f1f5f9;font-weight:600;border-left:3px solid #3b82f6;padding-left:11px}.module-btn:focus{outline:none}.module-btn:focus-visible{outline:2px solid #3b82f6;outline-offset:-2px}.module-selector::-webkit-scrollbar{width:6px}.module-selector::-webkit-scrollbar-track{background:transparent}.module-selector::-webkit-scrollbar-thumb{background:#334155;border-radius:3px}.module-selector::-webkit-scrollbar-thumb:hover{background:#475569}.app{display:flex;flex-direction:column;height:100vh;background:var(--bg-primary)}.app-header{background:linear-gradient(135deg,#1e293b,#0f172a);color:#f1f5f9;padding:14px 24px;display:flex;align-items:center;gap:16px;border-bottom:1px solid #334155;box-shadow:0 2px 8px #0000004d;flex-shrink:0}.app-header h1{margin:0;font-size:1.4rem;font-weight:700;color:#f8fafc;letter-spacing:-.5px}.subtitle{font-size:.85rem;color:#94a3b8}.module-count{margin-left:auto;font-size:.8rem;color:#64748b;background:#334155;padding:4px 10px;border-radius:12px}.app-body{display:flex;flex:1;overflow:hidden}.module-content{flex:1;padding:24px;overflow-y:auto;background:var(--bg-primary)}.loading{display:flex;align-items:center;justify-content:center;height:100vh;font-size:1.2rem;color:#94a3b8}.module-panel{max-width:1200px;margin:0 auto}.module-panel h2{margin-top:0;color:#e2e8f0;font-size:1.5rem;border-bottom:2px solid #3b82f6;padding-bottom:8px;margin-bottom:16px}.module-panel .controls{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:20px;align-items:flex-end;padding:16px;background:#1e293b;border-radius:8px;border:1px solid #334155}.module-panel .control-group{display:flex;flex-direction:column;gap:6px}.module-panel .control-group label{font-size:.8rem;font-weight:600;color:#94a3b8}.module-panel .control-group input,.module-panel .control-group select{padding:8px 12px;border:1px solid #475569;border-radius:6px;font-size:.9rem;background:#334155;color:#f1f5f9;min-width:80px}.module-panel .control-group input:focus,.module-panel .control-group select:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px #3b82f633}.module-panel .result-box{background:#1e293b;border:1px solid #334155;border-radius:8px;padding:16px;margin-top:16px}.module-panel .result-box h3{color:#e2e8f0;font-size:1rem;margin-top:0;margin-bottom:12px}.module-panel .result-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}.module-panel .result-item{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;background:#334155;border-radius:6px;border:1px solid #475569}.module-panel .result-label{font-weight:600;color:#94a3b8;font-size:.85rem}.module-panel .result-value{font-family:SF Mono,Monaco,Consolas,monospace;color:#f1f5f9;font-weight:500;font-size:.95rem}.module-panel .result-box p{font-size:.85rem;color:#94a3b8;margin-top:12px;margin-bottom:0;line-height:1.5}.module-panel .js-plotly-plot,.module .js-plotly-plot{border-radius:8px;overflow:hidden;background:#1e293b;border:1px solid #334155}