/* =============================================================================
 * ESP Designer — stylesheet (light, engineering-clean)
 * ===========================================================================*/
:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --panel-2: #f8fafc;
  --ink: #1f2a37;
  --ink-soft: #5b6b7c;
  --line: #dce3ec;
  --line-strong: #c2cdd9;
  --brand: #1763b6;
  --brand-d: #0f4d92;
  --accent: #e8742a;
  --good: #1f8a4c;
  --warn: #c9801a;
  --bad: #c0392b;
  --sel: #e7f0fb;
  --shadow: 0 1px 2px rgba(20,40,70,.08), 0 2px 8px rgba(20,40,70,.06);
  --radius: 8px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  font-size: 14px;
  line-height: 1.45;
}
h1, h2, h3 { margin: 0; font-weight: 650; }
button { font-family: inherit; cursor: pointer; }
a { text-decoration: none; }

/* ---------------- Top bar ---------------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 10px 18px;
  background: linear-gradient(180deg, #ffffff, #f3f7fc);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  font-size: 26px; color: var(--brand);
  background: var(--sel); width: 42px; height: 42px;
  display: grid; place-items: center; border-radius: 10px;
}
.brand-text h1 { font-size: 17px; letter-spacing: .2px; }
.brand-text .tag { font-size: 11.5px; color: var(--ink-soft); }

.top-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.lang-wrap { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--ink-soft); }
.lang-wrap select {
  font-family: inherit; font-size: 13px; padding: 6px 8px;
  border: 1px solid var(--line-strong); border-radius: 6px; background: #fff; color: var(--ink);
}
.btn-ghost, .btn-primary, .btn-home, .btn-mail {
  font-size: 13px; padding: 7px 13px; border-radius: 7px; border: 1px solid var(--line-strong);
  background: #fff; color: var(--ink); transition: .12s;
}
.btn-ghost:hover { background: var(--panel-2); border-color: var(--brand); color: var(--brand); }
.btn-primary { background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 650; }
.btn-primary:hover { background: var(--brand-d); }
.btn-home, .btn-mail { font-weight: 600; }
.btn-home { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn-home:hover { background: var(--brand-d); }
.btn-mail { background: #fff; color: var(--brand); }
.btn-mail:hover { background: var(--sel); }
.btn-mini { font-size: 12px; padding: 5px 10px; border-radius: 6px; }
.econ-reset { padding: 6px; border-radius: 7px; display: inline-flex; align-items: center; justify-content: center; line-height: 0; }
.econ-reset svg { display: block; }
.tor-export { margin: 8px 0 2px; }
.cab-price-edit { margin-top: 14px; border-top: 1px dashed var(--line-strong); padding-top: 12px; }
.code-area {
  width: 100%; min-height: 132px; box-sizing: border-box; font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 12px; line-height: 1.5; color: var(--ink); background: var(--panel-2);
  border: 1px solid var(--line-strong); border-radius: 6px; padding: 8px 10px; resize: vertical; white-space: pre;
}
.cab-price-btns { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.cab-bulk { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-top: 8px; padding: 8px 10px; background: var(--panel-2); border: 1px dashed var(--line-strong); border-radius: 6px; font-size: 12px; color: var(--ink-soft); }
.cab-bulk input[type="number"] { width: 72px; padding: 3px 6px; font-size: 12px; border: 1px solid var(--line-strong); border-radius: 4px; background: var(--panel); color: var(--ink); }
.cab-status { font-size: 12px; margin-top: 6px; min-height: 16px; color: var(--ink-soft); }
.cab-status.ok { color: #1f8a4c; }
.cab-status.err { color: #c0392b; }

/* ---------------- Layout ---------------- */
.layout { display: flex; align-items: flex-start; gap: 14px; padding: 14px; }
.sidebar {
  width: 360px; flex: 0 0 360px; background: var(--panel);
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); max-height: calc(100vh - 78px); overflow: auto;
}
.results {
  flex: 1 1 auto; min-width: 0; background: var(--panel);
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); min-height: 500px; display: flex; flex-direction: column;
}
.sidebar-actions { display: flex; gap: 8px; padding: 12px 12px 0; flex-wrap: wrap; }
.sidebar-actions .btn-primary { flex: 1 1 auto; }
.sidebar-actions .btn-ghost { flex: 1 1 40%; }

/* ---------------- Form ---------------- */
#inputs { padding: 8px 12px 16px; }
.section { border: 1px solid var(--line); border-radius: 8px; margin-top: 12px; overflow: hidden; }
.section > .sec-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 12px; background: var(--panel-2); cursor: pointer; user-select: none;
  font-weight: 650; font-size: 13.5px; border-bottom: 1px solid var(--line);
}
.section > .sec-head .chev { color: var(--ink-soft); transition: transform .15s; }
.section.collapsed .sec-head .chev { transform: rotate(-90deg); }
.section.collapsed .sec-body { display: none; }
.sec-body { padding: 10px 12px 12px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px 10px; }

.fld { display: flex; flex-direction: column; gap: 3px; }
.fld.wide { grid-column: 1 / -1; }
.fld label { font-size: 11.5px; color: var(--ink-soft); display: flex; justify-content: space-between; gap: 6px; }
.fld label .unit { color: #97a6b6; font-size: 10.5px; }
.fld input[type=number], .fld select {
  font-family: inherit; font-size: 13px; padding: 6px 8px;
  border: 1px solid var(--line-strong); border-radius: 6px; background: #fff; color: var(--ink);
  width: 100%;
}
.fld input:focus, .fld select:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 2px var(--sel); }
.fld .chk { display: flex; align-items: center; gap: 7px; padding: 7px 2px; font-size: 13px; }
.fld .chk input { width: 15px; height: 15px; }

/* ---------------- Tabs ---------------- */
.tabs { display: flex; gap: 2px; padding: 8px 10px 0; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.tab {
  padding: 9px 15px; font-size: 13.5px; font-weight: 600; color: var(--ink-soft);
  background: transparent; border: none; border-bottom: 2px solid transparent; cursor: pointer;
}
.tab:hover { color: var(--brand); }
.tab.active { color: var(--brand); border-bottom-color: var(--brand); }
.tab-body { padding: 16px; flex: 1 1 auto; overflow: auto; }
.placeholder { color: var(--ink-soft); text-align: center; padding: 60px 20px; }

/* ---------------- Summary ---------------- */
.summary-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }
.card {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px;
}
.card .k { font-size: 11.5px; color: var(--ink-soft); margin-bottom: 4px; }
.card .v { font-size: 20px; font-weight: 700; font-family: var(--mono); }
.card .v small { font-size: 12px; font-weight: 500; color: var(--ink-soft); }
.card.big { grid-column: span 2; }
.card.good { border-color: var(--good); background: #effaf2; }
.card.bad { border-color: var(--bad); background: #fdecea; }

.tbl { width: 100%; border-collapse: collapse; margin-top: 6px; font-size: 13px; }
.tbl th, .tbl td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--line); }
.tbl th { color: var(--ink-soft); font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: .3px; }
.tbl td.num { text-align: right; font-family: var(--mono); }
.tbl tr:hover td { background: var(--panel-2); }
.group-title { margin: 18px 0 4px; font-size: 13px; font-weight: 700; color: var(--brand); }

/* warnings */
.warnings { margin-top: 16px; display: flex; flex-direction: column; gap: 8px; }
.warn-row { display: flex; gap: 9px; align-items: flex-start; padding: 9px 12px; border-radius: 7px; font-size: 13px; }
.warn-row.ok { background: #effaf2; border: 1px solid var(--good); color: #15633a; }
.warn-row.bad { background: #fdecea; border: 1px solid var(--bad); color: #8d2a1f; }
.warn-row .ic { font-weight: 800; }

/* ---------------- Charts ---------------- */
.chart-wrap { width: 100%; overflow-x: auto; }
svg.chart { width: 100%; height: auto; display: block; background: #fff; }
.chart-legend { display: flex; gap: 16px; flex-wrap: wrap; margin: 8px 2px 0; font-size: 12.5px; color: var(--ink-soft); }
.chart-legend .it { display: flex; align-items: center; gap: 6px; }
.chart-legend .sw { width: 14px; height: 4px; border-radius: 2px; display: inline-block; }

/* ---------------- Sensitivity ---------------- */
.sens-table { margin-top: 14px; }

/* ---------------- Report ---------------- */
.report-doc { background: #fff; padding: 28px 34px; max-width: 820px; margin: 0 auto; border: 1px solid var(--line); border-radius: 6px; }
.report-doc h2 { font-size: 20px; margin-bottom: 2px; }
.report-doc .sub { color: var(--ink-soft); font-size: 12.5px; margin-bottom: 18px; }
.report-doc h3 { font-size: 14px; margin: 20px 0 6px; color: var(--brand); border-bottom: 1px solid var(--line); padding-bottom: 4px; }
.report-doc table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.report-doc td, .report-doc th { border: 1px solid var(--line); padding: 5px 8px; text-align: left; }
.report-doc td.num { text-align: right; font-family: var(--mono); }
.report-card { display: flex; flex-wrap: wrap; gap: 10px 18px; margin: 10px 0 4px; padding: 12px 14px; background: #f6f8fb; border: 1px solid var(--line); border-radius: 8px; }
.report-card .rc { min-width: 92px; }
.report-card .rc-k { font-size: 11px; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .03em; }
.report-card .rc-v { font-size: 15px; font-weight: 600; font-family: var(--mono); }
.corr-base td { background: #eef5ff; }
.corr-sens .badge { font-size: 10px; }
.share-status { font-size: 12px; color: var(--brand); align-self: center; margin-left: 4px; }

/* ---------------- Survey editor ---------------- */
.sv-table { display: flex; flex-direction: column; gap: 6px; grid-column: 1 / -1; }
.sv-row { display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: 6px; align-items: end; }
.sv-cell { display: flex; flex-direction: column; gap: 2px; }
.sv-cell label { font-size: 10.5px; color: var(--ink-soft); }
.sv-cell input { font-family: inherit; font-size: 12.5px; padding: 5px 7px; border: 1px solid var(--line-strong); border-radius: 6px; background: #fff; color: var(--ink); width: 100%; }
.sv-cell input:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 2px var(--sel); }
.sv-del { justify-content: flex-end; }
.sv-del-btn { padding: 5px 9px; font-size: 11.5px; border: 1px solid var(--line-strong); background: #fff; border-radius: 6px; color: var(--bad); cursor: pointer; }
.sv-del-btn:hover { background: #fdecea; border-color: var(--bad); }
.sv-ctl { margin-top: 2px; }
.sv-add { align-self: flex-start; }
.sv-derived { grid-column: 1 / -1; margin-top: 4px; padding: 8px 10px; background: var(--panel-2); border: 1px dashed var(--line-strong); border-radius: 7px; font-size: 11.5px; }
.sv-derived-h { font-weight: 650; color: var(--brand); margin-bottom: 4px; }
.sv-derived-row { font-family: var(--mono); color: var(--ink-soft); }
.sv-dtable { width: 100%; border-collapse: collapse; margin-top: 6px; font-size: 11px; }
.sv-dtable th { text-align: left; color: var(--ink-soft); font-weight: 600; border-bottom: 1px solid var(--line-strong); padding: 3px 6px; }
.sv-dtable td { font-family: var(--mono); padding: 3px 6px; border-bottom: 1px solid var(--line); }
.sv-dtable tr:hover td { background: #fff; }
.sv-note { margin-top: 4px; font-size: 11px; color: var(--ink-soft); font-style: italic; }

/* survey CSV import */
.sv-import { grid-column: 1 / -1; margin-top: 8px; padding: 10px; background: var(--panel-2); border: 1px dashed var(--line-strong); border-radius: 8px; display: flex; flex-direction: column; gap: 7px; }
.sv-import-h { font-weight: 650; font-size: 12.5px; color: var(--brand); }
.sv-import-hint { font-size: 11px; color: var(--ink-soft); }
.sv-import-fmt { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--ink-soft); }
.sv-import-fmt select { font-family: inherit; font-size: 12.5px; padding: 4px 8px; border: 1px solid var(--line-strong); border-radius: 6px; background: #fff; color: var(--ink); }
.sv-import-ta { width: 100%; min-height: 92px; font-family: var(--mono); font-size: 12px; padding: 7px 9px; border: 1px solid var(--line-strong); border-radius: 6px; background: #fff; color: var(--ink); resize: vertical; }
.sv-import-ta:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 2px var(--sel); }
.sv-import-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.sv-import-status { font-size: 12px; }
.sv-import-status.ok { color: var(--good); }
.sv-import-status.err { color: var(--bad); }

/* report pump curve table */
.report-curve { font-size: 12px; }
.report-curve th { color: var(--ink-soft); font-weight: 600; }
.report-chart { margin-top: 10px; }

/* system-note under nodal chart */
.sys-note { font-size: 12px; color: var(--ink-soft); margin: 4px 2px 0; max-width: 640px; }

/* NPV legend line explaining the '*' marker */
.legend { font-size: 12px; color: var(--ink-soft); margin: 2px 2px 0; display: flex; align-items: baseline; gap: 6px; }
.legend .star { font-weight: 700; color: var(--brand); flex: 0 0 auto; }

/* ---------------- Sensitivity controls ---------------- */
.sens-ctl { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.sens-ctl label { font-size: 13px; color: var(--ink-soft); display: flex; align-items: center; gap: 6px; }
.sens-ctl select { font-family: inherit; font-size: 13px; padding: 5px 8px; border: 1px solid var(--line-strong); border-radius: 6px; background: #fff; color: var(--ink); }
.sens-info { font-size: 12px; color: var(--ink-soft); }
.sens-note { font-size: 12px; color: var(--ink-soft); margin-top: 10px; }

/* ---------------- Pump selection ---------------- */
.psel-title { font-size: 14px; margin: 18px 0 6px; color: var(--brand); border-bottom: 1px solid var(--line); padding-bottom: 4px; }
.psel-table { margin-top: 6px; }
.psel-table td, .psel-table th { text-align: left; padding: 6px 9px; border-bottom: 1px solid var(--line); }
.psel-table th { color: var(--ink-soft); font-weight: 600; font-size: 11.5px; }
.psel-table td.num { text-align: right; font-family: var(--mono); }
.psel-cur { background: var(--sel); }
.psel-cur td { font-weight: 600; }
.psel-tag { font-size: 10.5px; color: var(--brand); background: var(--sel); border: 1px solid var(--brand); border-radius: 4px; padding: 1px 5px; margin-left: 4px; }
.psel-btn { padding: 4px 10px; font-size: 11.5px; border: 1px solid var(--brand); background: #fff; color: var(--brand); border-radius: 6px; cursor: pointer; }
.psel-btn:hover { background: var(--brand); color: #fff; }
.psel-none { color: var(--ink-soft); font-size: 13px; }
.psel-foot { margin-top: 10px; }
.psel-export { padding: 5px 12px; font-size: 12px; }

/* optimizer tab */
.opt-ctl { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin: 4px 2px 8px; }
.opt-ctl label { font-size: 13px; color: var(--ink-soft); display: inline-flex; gap: 6px; align-items: center; }
.opt-ctl input { width: 64px; }
.opt-res { margin-top: 8px; }
.opt-card { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 8px 16px;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; margin-top: 10px; font-size: 13px; }
.opt-card b { color: var(--ink); }

/* design health check (diagnostics) */
.diag-ok { font-size: 13px; color: var(--ok, #1f8a4c); margin: 4px 2px; }
.diag-list { display: flex; flex-direction: column; gap: 8px; margin: 6px 0; }
.diag-row { display: flex; gap: 10px; align-items: flex-start; border: 1px solid var(--border);
  border-left-width: 4px; border-radius: 8px; padding: 8px 12px; background: var(--bg); }
.diag-row.d-blocker { border-left-color: #c0392b; }
.diag-row.d-warning { border-left-color: #e08e0b; }
.diag-row.d-info { border-left-color: #378add; }
.diag-badge { flex: 0 0 auto; font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 20px; color: #fff; }
.d-blocker .diag-badge { background: #c0392b; }
.d-warning .diag-badge { background: #e08e0b; }
.d-info .diag-badge { background: #378add; }
.diag-body { font-size: 13px; }
.diag-msg { font-weight: 500; }
.diag-reco { color: var(--ink-soft); margin-top: 2px; }

/* report optimizer/diagnostic cards */
.report-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px 16px;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; font-size: 13px; }

/* ===== Tier 2/3 panels: advisor / scenarios / run-life / assembly / wellbore ===== */
.adv-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 8px 16px;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; font-size: 13px; margin-bottom: 10px; }
.adv-win { grid-column: 1 / -1; font-size: 14px; }
.adv-win b { color: var(--ink); }

.asm-flex { display: flex; flex-wrap: wrap; gap: 18px; align-items: flex-start; margin-bottom: 10px; }
.asm-flex svg { flex: 0 0 auto; }

.wrap-ctl { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.wb-az-label { font-size: 13px; color: var(--ink-soft); display: inline-flex; gap: 8px; align-items: center; }
.wb-az-label input[type=range] { vertical-align: middle; }

.scen-ctl { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: 4px 2px 10px; }
.scen-ctl input[type=text] { width: 180px; padding: 5px 8px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; }
.scen-table .scen-del { border: none; background: none; color: #c0392b; font-size: 16px; line-height: 1; cursor: pointer; padding: 0 4px; }
.scen-table .scen-del:hover { color: #8e1f15; }

/* ===== engineering guardrails / self-check / cable / tornado ===== */
.guard-bar { margin-bottom: 10px; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.check-row { display: flex; gap: 8px; align-items: center; padding: 6px 10px; font-size: 13px; border-left: 4px solid transparent; }
.check-row .ic { font-weight: 700; }
.check-row.blocker { background: #fdecea; color: #8e1f15; border-left-color: #c0392b; }
.check-row.warning { background: #fff6e6; color: #8a5a00; border-left-color: #e0902a; }
.selfcheck-banner { margin-bottom: 10px; padding: 6px 10px; border-radius: 8px; font-size: 13px; border: 1px solid var(--border); }
.selfcheck-banner.ok { background: #eaf6ee; color: #1f7a3d; border-color: #bfe3cb; }
.selfcheck-banner.warn { background: #fff6e6; color: #8a5a00; border-color: #f0d9a8; }
.badge { display: inline-block; font-size: 11px; font-weight: 600; padding: 1px 8px; border-radius: 20px; color: #fff; }
.badge.ok { background: #1f8a4c; }
.badge.warn { background: #e0902a; }
.badge.fail { background: #c0392b; }
.cab-wrap { margin-top: 12px; }
.reco-row { background: #eaf6ee; }
.reco-row td { font-weight: 600; }
.report-thumb { margin: 4px 0; }

/* ---------------- benchmark & interactive tornado ---------------- */
.bench-ctl { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 12px; }
.bench-ctl select { min-width: 320px; }
.bench-table th, .bench-table td { padding: 4px 10px; }
.bench-ov th, .bench-ov td { padding: 4px 8px; font-size: 13px; }
.bench-ov td:first-child { max-width: 380px; }
.corr-pill { font-family: var(--mono); background: var(--sel); color: var(--brand-d); padding: 0 6px; border-radius: 4px; font-size: 12px; }
.hint { color: #1763b6; font-style: italic; }
.tornado-svg text[style*="cursor"]:hover { text-decoration: underline; }
.tornado-detail { margin-top: 14px; padding: 12px 14px; border: 1px solid #dce3ec; border-radius: 8px; background: var(--bg-soft); }
.tornado-detail h4 { margin: 0 0 6px; }
.tornado-detail .report-thumb { margin: 4px 0 10px; }

/* ---------------- Responsive ---------------- */
@media (max-width: 980px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; flex: 1 1 auto; max-height: none; }
  .results { min-height: 400px; }
}
@media print {
  @page { size: A4; margin: 14mm 16mm; }
  .topbar, .sidebar, .tabs, .bench-ctl, #pdfBtn, #printBtn, #shareBtn, #shareStatus { display: none !important; }
  .results { border: none; box-shadow: none; width: 100%; }
  .report-doc { border: none; max-width: 100%; padding: 0; }
  .report-doc h2 { font-size: 18px; margin-bottom: 4px; page-break-after: avoid; }
  .report-doc h3 { page-break-after: avoid; border-bottom: 1px solid #ccc; padding-bottom: 2px; margin-top: 14px; }
  .report-doc thead { display: table-header-group; }
  .report-doc tr { page-break-inside: avoid; }
  .report-doc table, .report-doc svg, .report-cards, .guard-bar, .selfcheck-banner, .tornado-detail, .report-thumb, .report-card { page-break-inside: avoid; }
  .guard-bar, .selfcheck-banner, .check-row, .badge, .reco-row, .corr-pill { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  a { color: #000; text-decoration: none; }
}