:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#111827;background:#eef2f6;font-synthesis:none;text-rendering:geometricPrecision;-webkit-font-smoothing:antialiased;--ink: #111827;--muted: #607080;--line: #d8dee7;--panel: #ffffff;--teal: #0f766e;--red: #b42318;--amber: #b7791f}*{box-sizing:border-box}html,body{width:100%;height:100%;overflow:hidden}body{margin:0;min-width:320px;min-height:100%}#app{width:100%;height:100%;overflow:hidden}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}.app-shell{display:grid;grid-template-rows:auto minmax(0,1fr);gap:14px;width:100%;height:100dvh;overflow:hidden;padding:16px}.top-bar{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;min-height:64px;margin:0}.top-bar h1,.chart-header h2,.model-header h2,.panel-title h2{margin:0;color:var(--ink);letter-spacing:0}.top-bar h1{font-size:34px;line-height:1.08}.eyebrow{margin:0 0 5px;color:var(--teal);font-size:12px;font-weight:800;letter-spacing:0;text-transform:uppercase}.status-strip{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px}.status-strip span{border:1px solid var(--line);border-radius:8px;background:#ffffffb3;padding:7px 10px;color:#344454;font-size:13px}.workspace{min-width:0;min-height:0;width:100%;height:100%}.main-stage{width:100%;height:100%;min-width:0;min-height:0}.chart-shell,.model-shell,.control-panel{border:1px solid var(--line);border-radius:8px;background:var(--panel);box-shadow:0 18px 44px #0f172a14}.chart-shell,.model-shell{height:100%;min-width:0;min-height:0;overflow:hidden}.chart-header,.model-header{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px 18px 10px}.chart-header h2,.model-header h2{font-size:20px}.chart-actions,.model-tools{display:flex;align-items:center;gap:8px}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}.icon-button:hover,.primary-button:hover{border-color:#9aa7b5;background:#f8fafc}.icon-button:disabled:hover{border-color:var(--line);background:#fff}.chart-canvas{width:100%;height:calc(100% - 72px);min-height:0}.model-canvas{display:block;width:100%;height:calc(100% - 72px);min-height:0;outline:none;cursor:crosshair}.control-panel{width:100%;height:100%;min-height:0;overflow-y:auto;padding:18px}.splitpanes__pane{min-width:0;min-height:0}.workbench-split>.splitpanes__splitter,.observation-model-split>.splitpanes__splitter{position:relative;flex-shrink:0;background:transparent}.workbench-split>.splitpanes__splitter{width:14px;border:0}.observation-model-split>.splitpanes__splitter{height:14px;border:0}.workbench-split>.splitpanes__splitter:before,.observation-model-split>.splitpanes__splitter:before{content:"";position:absolute;border-radius:999px;background:#b8c2cc;transition:background .15s ease}.workbench-split>.splitpanes__splitter:before{top:16px;bottom:16px;left:6px;width:2px}.observation-model-split>.splitpanes__splitter:before{top:6px;right:16px;left:16px;height:2px}.workbench-split>.splitpanes__splitter:hover:before,.observation-model-split>.splitpanes__splitter:hover:before{background:#52616f}.panel-title{display:flex;align-items:center;gap:9px;margin-bottom:16px}.panel-title h2{font-size:20px}fieldset{margin:0 0 18px;padding:14px;border:1px solid var(--line);border-radius:8px}.tool-row{display:flex;align-items:center;gap:8px;margin-bottom:12px}.tool-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.body-list{display:grid;gap:8px;margin-bottom:14px}.body-row{display:grid;grid-template-columns:minmax(0,1fr) 32px;align-items:center;gap:8px}.body-chip{display:grid;grid-template-columns:14px minmax(0,1fr);align-items:center;gap:8px;min-height:38px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:6px 7px;color:#25313c;text-align:left}.body-chip.selected{border-color:#111827;background:#f8fafc}.body-chip span:last-child{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.color-dot{width:12px;height:12px;border:1px solid rgba(17,24,39,.28);border-radius:50%}.mini-icon{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border:0;border-radius:8px;background:transparent;color:var(--muted)}.mini-icon:hover{background:#eef2f6;color:var(--ink)}.text-field,.color-field{display:grid;grid-template-columns:64px minmax(0,1fr);align-items:center;gap:8px;margin-bottom:12px;color:#25313c;font-size:13px;font-weight:700}.text-field input,.color-field input{min-width:0;border:1px solid var(--line);border-radius:8px;background:#fff}.text-field input{padding:7px 8px;color:var(--ink)}.color-field input{width:52px;height:34px;padding:2px}legend{padding:0 7px;color:var(--muted);font-size:13px;font-weight:800}.range-field{display:grid;grid-template-columns:minmax(0,1fr) 86px;gap:8px 10px;align-items:center;margin-bottom:14px}.range-label{grid-column:1 / -1;display:flex;justify-content:space-between;gap:10px;color:#25313c;font-size:13px;font-weight:700}.range-label span:last-child{color:var(--muted);font-variant-numeric:tabular-nums;text-align:right}input[type=range]{width:100%;accent-color:var(--teal)}.number-input{width:86px;min-width:0;border:1px solid var(--line);border-radius:8px;padding:7px 8px;color:var(--ink);font-size:13px}.primary-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;min-height:40px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);font-weight:800}.microcopy,.method-note{margin:0;color:var(--muted);font-size:13px;line-height:1.55}.hidden-input{display:none}.method-note{border-left:3px solid var(--amber);padding-left:12px}@media(max-width:1040px){.control-panel{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.panel-title,.method-note{grid-column:1 / -1}fieldset{margin:0}.workbench-split>.splitpanes__splitter{width:auto;height:14px}.workbench-split>.splitpanes__splitter:before{inset:6px 16px auto;width:auto;height:2px}}@media(max-width:720px){.app-shell{padding:12px}.top-bar{align-items:flex-start;flex-direction:column}.top-bar h1{font-size:28px}.status-strip{justify-content:flex-start}.top-bar{gap:10px;min-height:88px}.control-panel{grid-template-columns:1fr}.panel-title,.method-note{grid-column:auto}}