:root{--color-background: #f8fafc;--color-surface: #ffffff;--color-text: #1f2937;--color-muted: #4b5563;--color-border: #d1d5db;--color-primary: #2563eb;--color-primary-dark: #1d4ed8;--color-secondary: #6b7280;--color-danger: #b91c1c;--color-loading: #d97706;--color-ready: #059669;--color-error: #b91c1c;--space-1: .5rem;--space-2: 1rem;--space-3: 1.5rem;--space-4: 2rem;--radius: .5rem;--min-tap: 2.75rem}:root[data-theme=dark]{--color-background: #0f172a;--color-surface: #1e293b;--color-text: #e5e7eb;--color-muted: #9ca3af;--color-border: #374151;--color-primary: #60a5fa;--color-primary-dark: #3b82f6;--color-secondary: #6b7280;--color-danger: #f87171;--color-loading: #fbbf24;--color-ready: #34d399;--color-error: #f87171}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;background:var(--color-background);color:var(--color-text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}#app{max-width:1200px;margin:0 auto;padding:var(--space-3) var(--space-2) var(--space-4)}a{color:var(--color-primary)}.app-header__row{display:flex;align-items:center;justify-content:space-between;gap:var(--space-2)}.app-header h1{margin:0;font-size:1.5rem}.app-header__byline{margin:.25rem 0 0;color:var(--color-muted);font-size:.9rem}.icon-button{width:var(--min-tap);height:var(--min-tap);border-radius:999px;border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);font-size:1.1rem;cursor:pointer;flex-shrink:0}.explainer{margin:var(--space-2) 0 var(--space-3);color:var(--color-muted);max-width:65ch}.engine-state{display:flex;align-items:center;gap:.5rem;margin-bottom:var(--space-1);font-size:.9rem}.engine-state__dot{width:.6rem;height:.6rem;border-radius:999px;background:var(--color-loading);flex-shrink:0}.engine-state[data-state=ready] .engine-state__dot{background:var(--color-ready)}.engine-state[data-state=preparing] .engine-state__dot,.engine-state[data-state=simulating] .engine-state__dot{background:var(--color-primary);animation:pulse 1.2s ease-in-out infinite}.engine-state[data-state=error] .engine-state__dot{background:var(--color-error)}@keyframes pulse{0%,to{opacity:1}50%{opacity:.35}}.notice-list{margin:var(--space-1) 0 0;padding-left:1.25rem;color:var(--color-muted);font-size:.9rem}.notice-details{margin-bottom:var(--space-3);font-size:.9rem}.notice-details summary{cursor:pointer;color:var(--color-muted)}.workspace{display:grid;grid-template-columns:minmax(280px,340px) 1fr;gap:var(--space-3);align-items:start}.panel{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:var(--space-3)}.parameter-panel{position:sticky;top:var(--space-2)}.panel h2{margin-top:0}.form-field{display:flex;flex-direction:column;gap:.25rem;margin-bottom:var(--space-2)}.form-field-row{display:flex;gap:var(--space-1)}.form-field-row input{flex:1;min-width:0}.form-subfield{display:flex;flex-direction:column;gap:.15rem;width:6.5rem;flex-shrink:0}.form-subfield__label{font-weight:600;font-size:.75rem;color:var(--color-muted)}.form-subfield select{width:100%}label{font-weight:600;font-size:.9rem}.field-help{margin:0;color:var(--color-muted);font-size:.8rem}.field-note{margin:0;color:var(--color-muted);font-size:.8rem;min-height:1.1em}.field-error{color:var(--color-error);font-weight:600}input,select{padding:.5rem;border:1px solid var(--color-border);border-radius:.375rem;font-size:1rem;min-height:var(--min-tap);background:var(--color-surface);color:var(--color-text)}input:disabled,select:disabled{opacity:.6}:focus-visible{outline:3px solid var(--color-primary);outline-offset:2px}.form-actions{display:flex;flex-wrap:wrap;gap:var(--space-2);margin-top:var(--space-2)}.button{padding:.6rem 1.25rem;min-height:var(--min-tap);border-radius:.375rem;border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);font-size:1rem;cursor:pointer}.button:disabled{cursor:not-allowed;opacity:.6}.button--primary{background:var(--color-primary);border-color:var(--color-primary-dark);color:#fff}.button--primary:hover:not(:disabled){background:var(--color-primary-dark)}.button--secondary{background:var(--color-secondary);border-color:var(--color-secondary);color:#fff}.button-row{display:flex;flex-wrap:wrap;gap:var(--space-2);margin-top:var(--space-2)}.status-text{color:var(--color-muted);font-size:.9rem}.run-status{display:flex;align-items:center;gap:var(--space-2);margin-bottom:var(--space-2)}.progress-row{display:flex;align-items:center;gap:var(--space-2);flex:1}progress{flex:1;height:.75rem}.tabs{display:flex;gap:.25rem;border-bottom:1px solid var(--color-border);margin-bottom:var(--space-3)}.tab{padding:.6rem 1rem;min-height:var(--min-tap);border:none;border-bottom:3px solid transparent;background:transparent;color:var(--color-muted);font-size:1rem;cursor:pointer}.tab[aria-selected=true]{color:var(--color-primary);border-bottom-color:var(--color-primary);font-weight:600}.tab:disabled{cursor:not-allowed;opacity:.5}.empty-state{color:var(--color-muted);padding:var(--space-3) 0}.stat-strip{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:var(--space-2);margin-bottom:var(--space-3)}.stat-tile{container-type:inline-size;display:flex;flex-direction:column;gap:.15rem;padding:var(--space-2);border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-background)}.stat-tile__value{font-size:clamp(.7rem,9cqi,1.25rem);font-weight:700;white-space:nowrap;overflow:hidden}.stat-tile__label{font-size:.8rem;color:var(--color-muted)}.chart-grid{display:grid;gap:var(--space-3);grid-template-columns:repeat(auto-fit,minmax(320px,1fr));margin-bottom:var(--space-3)}.chart-panel{border:1px solid var(--color-border);border-radius:var(--radius);padding:var(--space-2)}.chart-panel h3{display:flex;align-items:center;justify-content:space-between;gap:var(--space-1);margin:0 0 var(--space-1);font-size:1rem}.chart-reset-zoom{min-height:unset;padding:.2rem .55rem;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);color:var(--color-muted);font-size:.75rem;font-weight:400;cursor:pointer;flex-shrink:0}.chart-reset-zoom:hover{color:var(--color-text);border-color:var(--color-primary)}.chart-panel--wide{grid-column:1 / -1}.validation-note{grid-column:1 / -1;margin:0}.chart-canvas{width:100%;height:320px}.app-footer{margin-top:var(--space-4);padding-top:var(--space-2);border-top:1px solid var(--color-border);color:var(--color-muted);font-size:.85rem}.app-footer summary{cursor:pointer;font-weight:600;min-height:var(--min-tap);display:list-item;padding:.75rem 0}.citation-list{padding-left:1.25rem}.citation-list li{margin-bottom:.5rem}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media (max-width: 800px){.workspace{grid-template-columns:1fr}.parameter-panel{position:static}}@media (max-width: 480px){#app{padding:var(--space-2) var(--space-1) var(--space-3)}.chart-grid{grid-template-columns:1fr}.chart-canvas{height:260px}.form-field-row{flex-direction:column}.form-subfield{width:100%}}