:root{--bg: #f3f4f6;--card: #ffffff;--ink: #111827;--muted: #6b7280;--border: #e5e7eb;--grid: #e5e7eb;--accent: #2563eb;--accent-ink: #ffffff;--danger: #dc2626;--ok: #16a34a;--warn: #b45309;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink)}button{font:inherit;cursor:pointer}input,select{font:inherit}h3{margin:0 0 8px;font-size:15px}code{background:#eef2ff;padding:1px 4px;border-radius:4px;font-size:12px}.app{display:flex;flex-direction:column;height:100vh}.toolbar{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;background:var(--card);border-bottom:1px solid var(--border);gap:16px;flex-wrap:wrap}.toolbar-left,.toolbar-right{display:flex;align-items:center;gap:8px}.app-title{font-size:16px}.mode-switch{display:inline-flex;border:1px solid var(--border);border-radius:8px;overflow:hidden}.mode-switch button{border:0;background:var(--card);padding:6px 14px}.mode-switch button.active{background:var(--accent);color:var(--accent-ink)}.mode-switch button:disabled{color:var(--muted);cursor:not-allowed}.toolbar-right button,.toolbar-right select{padding:6px 10px;border:1px solid var(--border);border-radius:8px;background:var(--card)}.workspace{flex:1;overflow:auto;padding:16px}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:14px;margin-bottom:14px}.build-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:16px;align-items:start}@media (max-width: 980px){.build-grid{grid-template-columns:1fr}}.section-head{display:flex;align-items:center;justify-content:space-between}.count{color:var(--muted);font-weight:400;font-size:13px}.add-btn{border:1px solid var(--accent);color:var(--accent);background:transparent;border-radius:8px;padding:4px 10px}.section-body{margin-top:10px;display:flex;flex-direction:column;gap:6px}.element-row{border:1px solid var(--border);border-radius:8px}.element-row.open{border-color:var(--accent)}.element-summary{display:flex;align-items:center;justify-content:space-between}.disclosure{flex:1;text-align:left;border:0;background:transparent;padding:8px 10px}.icon-btn{border:0;background:transparent;color:var(--muted);padding:6px 10px}.icon-btn:hover{color:var(--danger)}.element-editor{padding:10px;border-top:1px solid var(--border)}.editor-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.field{display:flex;flex-direction:column;gap:4px;font-size:13px}.field>span{color:var(--muted)}.field input,.field select{padding:6px 8px;border:1px solid var(--border);border-radius:6px}.field.wide{grid-column:1 / -1}.conn-row{display:grid;grid-template-columns:1fr auto 1fr auto;gap:6px;align-items:center;margin-bottom:6px}.conn-row select{padding:6px 8px;border:1px solid var(--border);border-radius:6px}.validation .ok{color:var(--ok)}.validation ul{margin:6px 0;padding-left:18px;font-size:13px}.validation .errors li{color:var(--danger)}.validation .warnings li{color:var(--warn)}.hint ul{padding-left:18px;font-size:13px;line-height:1.5}.muted{color:var(--muted)}.small{font-size:12px}.run-grid{display:grid;grid-template-columns:1fr;gap:14px}.run-status{display:flex;gap:24px;align-items:center;margin-bottom:10px}.run-status span{display:block;font-size:12px}.run-status strong{font-size:18px}.step-badge strong{font-size:22px;color:var(--accent)}.run-buttons{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.run-buttons button{padding:8px 16px;border:1px solid var(--border);border-radius:8px;background:var(--card)}.run-buttons button:first-child,.run-n button{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.run-buttons .danger{color:var(--danger);border-color:var(--danger);background:transparent}.run-n{display:inline-flex;align-items:center;gap:6px}.run-n input{width:64px;padding:8px;border:1px solid var(--border);border-radius:8px}.run-error{margin-top:10px;color:var(--danger);background:#fef2f2;border:1px solid #fecaca;padding:8px 10px;border-radius:8px}.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;gap:10px}.panel-head button{padding:6px 12px;border:1px solid var(--border);border-radius:8px;background:var(--card)}.series-picker{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}.chip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border);border-radius:999px;padding:4px 10px;font-size:13px;cursor:pointer}.chip.on{border-color:var(--accent);background:#eff6ff}.chip input{display:none}.chip .kind{color:var(--muted);font-size:10px;text-transform:uppercase}.axis-chip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border);border-radius:8px;padding:4px 8px;font-size:13px}.axis-chip.on{border-color:var(--accent)}.axis-chip .swatch{width:12px;height:12px;border-radius:3px;display:inline-block}.axis-chip select{border:1px solid var(--border);border-radius:6px;padding:2px 4px}.table-scroll{overflow:auto;max-height:360px;border:1px solid var(--border);border-radius:8px}table{border-collapse:collapse;width:100%;font-size:13px}th,td{padding:6px 10px;text-align:right;border-bottom:1px solid var(--border);white-space:nowrap}th{position:sticky;top:0;background:#f9fafb;text-align:right}th .unit{color:var(--muted);font-weight:400;font-size:11px}.step-col{text-align:left;color:var(--muted)}td:first-child,th:first-child{text-align:left}.chart-area{min-height:120px}