.field-legend{display:block;font-size:12px;font-weight:600;margin-bottom:7px}
.choice small{display:block;font-size:11px;color:var(--muted);font-weight:400}
.choice button[aria-pressed=true] small{color:var(--teal)}
.segment{border:1px solid var(--border);border-radius:9px;padding:14px;margin-bottom:12px;background:#fbfdfc}
.segment-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.segment-head strong{font-size:13px;color:var(--teal)}
.segment-head button{border:0;background:none;color:var(--red);font-size:12px;cursor:pointer;padding:4px}
.segment .field{margin-bottom:10px}
.range-buttons{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.range-buttons button{border:1px solid #d7e2df;background:#fff;border-radius:4px;padding:4px 7px;font-size:12px;color:#4f6f70;cursor:pointer}
.range-buttons button.chosen{border-color:#5b9b96;color:var(--teal);background:#edf6f3}
.segment details{border-top:1px solid var(--border);margin-top:4px;padding-top:8px}
.segment summary{cursor:pointer;font-size:12px;font-weight:600;color:var(--teal)}
.fitting-grid{display:grid;grid-template-columns:1fr 64px;gap:6px 8px;align-items:center;margin-top:8px;font-size:12px}
.fitting-grid label{color:var(--ink);font-weight:400;margin:0}
.fitting-grid input{min-height:32px;padding:4px 6px;font-size:13px}
.chart-wrap{margin-top:14px;border:1px solid var(--border);border-radius:8px;background:#fbfdfc;padding:6px}
#chart{display:block;width:100%;height:auto}
#chart text{font:12px "Segoe UI","Microsoft JhengHei",sans-serif;fill:#56696c}
#chart .grid{stroke:#e5ecea;stroke-width:1}
#chart .axis{stroke:#9fb3b5;stroke-width:1}
#chart .egl{fill:none;stroke:#176873;stroke-width:2.2;stroke-dasharray:7 4}
#chart .hgl{fill:none;stroke:#2f9dca;stroke-width:2.2}
#chart .pipe{fill:none;stroke:#7d8a8c;stroke-width:4;stroke-linecap:round}
#chart .neg{fill:#d9705f;fill-opacity:.25}
.legend{display:flex;flex-wrap:wrap;gap:14px;font-size:12px;color:var(--muted);margin-top:8px}
.legend span{display:flex;align-items:center;gap:6px}
.legend i{display:inline-block;width:18px;height:0;border-top:2px solid}
.legend .k-egl{border-color:#176873;border-top-style:dashed}
.legend .k-hgl{border-color:#2f9dca}
.legend .k-pipe{border-top-width:4px;border-color:#7d8a8c}
.legend .k-neg{height:10px;border:0;background:#d9705f40}
.formula-box+.formula-box{margin-top:10px}
@media(max-width:760px){#chart text{font-size:14px}}
.export-row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:14px}
.unit-pair{display:grid;grid-template-columns:1fr 128px;gap:8px}
.field-row.three{grid-template-columns:1fr 1fr 1fr}
.tool-box{border:1px solid var(--border);border-radius:8px;padding:10px 12px;margin-bottom:12px;background:#f8fbfa}
.tool-box summary{cursor:pointer;font-size:12px;font-weight:600;color:var(--teal)}
.tool-box[open] summary{margin-bottom:8px}
.tool-box textarea{width:100%;min-height:96px;border:1px solid #d6e0e1;border-radius:6px;padding:8px;font:13px/1.6 Consolas,monospace;resize:vertical}
.tool-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:8px}
.big-value{display:block;font-size:20px;color:var(--teal);padding-top:6px;font-variant-numeric:tabular-nums}
.pump-row{display:grid;grid-template-columns:auto 1fr 1fr auto;gap:8px;align-items:end;padding:10px 0;border-bottom:1px solid var(--border)}
.pump-row:last-child{border-bottom:0}
.pump-row strong{font-size:13px;color:var(--teal);padding-bottom:10px}
.pump-row .field{margin:0}
.pump-row button{border:0;background:none;color:var(--red);font-size:12px;cursor:pointer;padding:0 4px 10px}
@media(max-width:760px){.field-row.three{grid-template-columns:1fr 1fr}.pump-row{grid-template-columns:1fr 1fr}.pump-row strong{grid-column:1/-1;padding:0}}