/* ==========================================================================
   SmartTools — shared stylesheet (v0.2: 3-pane tool layout + sheet + print)
   ========================================================================== */
:root {
  --bg: #eef2f7;
  --panel: #ffffff;
  --ink: #17212e;
  --muted: #5b6b7f;
  --line: #d4dde8;
  --accent: #0b5fa5;
  --accent-dark: #084a80;
  --ok: #1d7a34;
  --ok-bg: #e8f5ec;
  --fail: #b3261e;
  --fail-bg: #fdeceb;
  --warn-bg: #fff7e0;
  --mono: "Cascadia Mono", Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  font: 14px/1.45 "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.page { max-width: 1880px; margin: 0 auto; padding: 14px 18px 60px; }
.spacer { flex: 1; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }

/* ---------- top bar ---------- */
.topbar { display: flex; align-items: center; gap: 12px; padding: 8px 0 12px; flex-wrap: wrap; }
.topbar .brand { font-weight: 700; font-size: 16px; color: var(--ink); text-decoration: none; white-space: nowrap; }
.topbar .brand:hover { color: var(--accent); }
.tool-title { font-size: 19px; margin: 0; white-space: nowrap; }

h1 { font-size: 22px; margin: 6px 0 2px; }
h2 { font-size: 15px; margin: 0 0 10px; }
h3 { font-size: 14px; margin: 16px 0 6px; }
.sub { color: var(--muted); }
a { color: var(--accent); }
code { font-family: var(--mono); font-size: 12.5px; background: #f2f6fb; padding: 1px 5px; border-radius: 4px; }

/* ---------- 3-pane layout (resizable inputs / deliverable — v0.20.0) ---------- */
.layout {
  display: grid;
  grid-template-columns: 240px minmax(320px, calc(var(--w-in, 44) * 1%)) 10px minmax(340px, 1fr);
  gap: 14px;
  align-items: start;
}
.splitter {
  align-self: stretch;
  position: relative;
  cursor: col-resize;
  touch-action: none;
  min-height: 260px;
}
.splitter::before {
  content: '';
  position: absolute;
  left: 50%; top: 4px; bottom: 4px; width: 2px; margin-left: -1px;
  background: var(--line); border-radius: 1px;
}
.splitter::after {
  content: '';
  position: absolute;
  left: 50%; top: 50%; width: 4px; height: 42px; margin: -21px 0 0 -2px;
  background: #c3ccd8; border-radius: 2px;
}
.splitter:hover::before, .splitter.dragging::before,
.splitter:hover::after, .splitter.dragging::after { background: var(--accent); }
@media (max-width: 1300px) {
  .layout { grid-template-columns: 230px minmax(0, 1fr); }
  .pane-preview { grid-column: 1 / -1; }
  .splitter { display: none; }
}
@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
}

/* ---------- key-results bar (sticky top of the deliverable pane) ---------- */
.result-bar {
  position: sticky;
  top: 8px;
  z-index: 40;
  width: 210mm;
  max-width: 100%;
  margin: 0 auto 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  box-shadow: 0 2px 6px rgba(23, 33, 46, .06);
}
.result-bar .rb-top { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.result-bar .rb-gov { font-size: 12.5px; color: var(--muted); }
.result-bar .rb-stale { font-size: 12.5px; color: var(--fail); font-weight: 600; }
.result-bar .rb-list { max-height: min(56vh, 470px); overflow: auto; overscroll-behavior: contain; margin-top: 6px; }
.result-bar.closed .rb-list { display: none; }
.result-bar .rb-head,
.result-bar .rb-row {
  display: grid; grid-template-columns: 18px minmax(110px, 1fr) 108px 108px 58px;
  gap: 6px; align-items: baseline;
}
.result-bar .rb-head {
  font-size: 11px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  color: var(--muted); padding: 2px 0 4px; border-bottom: 1px solid var(--line);
}
.result-bar .rb-group {
  font-size: 11px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  color: var(--accent-dark); margin: 9px 0 2px;
}
.result-bar .rb-row { padding: 3px 0; border-bottom: 1px dotted #e6ecf3; font-size: 12.5px; }
.result-bar .rb-row .rb-st { color: var(--ok); font-weight: 700; }
.result-bar .rb-row.fail .rb-st { color: var(--fail); }
.result-bar .rb-num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.result-bar .rb-num.fos-min, .result-bar .rb-num.fos-max { color: var(--fail); font-weight: 700; }
.result-bar .rb-fix { font-size: 12px; color: #9a6700; padding: 2px 0 5px 24px; }

.pane { min-width: 0; }
.pane-head { display: flex; align-items: center; gap: 8px; margin: 2px 0 10px; flex-wrap: wrap; }
.pane-head h2 { margin: 0; }
.pane-foot { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }

.pane-cases {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  position: sticky;
  top: 10px;
  box-shadow: 0 1px 2px rgba(23, 33, 46, .05);
}
.case-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; max-height: 46vh; overflow: auto; }
.case-item {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 8px; border: 1px solid var(--line); border-radius: 8px;
  background: #fff; cursor: pointer;
}
.case-item:hover { border-color: var(--accent); }
.case-item.active { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(11, 95, 165, .14); }
.case-item input.case-name { border: none; background: transparent; font: inherit; font-weight: 600; width: 100%; min-width: 0; padding: 2px 0; }
.case-item input.case-name:focus { outline: none; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: #c3ccd8; flex: none; }
.dot.ok { background: var(--ok); }
.dot.fail { background: var(--fail); }
.case-status { font-size: 11px; font-weight: 700; color: var(--muted); letter-spacing: .04em; }
.case-title { font-weight: 600; font-size: 13px; color: var(--accent); }
.case-no { font-size: 11px; font-weight: 700; color: var(--muted); min-width: 13px; text-align: right; flex: none; }

/* section letters A, B, C … in the inputs column */
.pane-inputs { counter-reset: sec; }
.pane-inputs .card:not([hidden]) { counter-increment: sec; }
.pane-inputs .card:not([hidden]) > h2::before { content: counter(sec, upper-alpha) ". "; color: var(--accent); }

/* ---------- cards & forms ---------- */
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
  margin: 0 0 14px;
  box-shadow: 0 1px 2px rgba(23, 33, 46, .05);
}

.grid { display: grid; gap: 10px 14px; }
.grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 1500px) { .grid.cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .grid.cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 800px) { .grid.cols-4, .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; } }
/* breakpoint-aware layout spacers (keep field pairs on one row at 3- and 2-column widths) */
.grid .pad3 { display: block; }
.grid .pad2 { display: none; }
@media (max-width: 1500px) {
  .grid .pad3 { display: none; }
  .grid .pad2 { display: block; }
}
@media (max-width: 800px) {
  .grid .pad3, .grid .pad2 { display: none; }
}

.field { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.field label { font-size: 12px; color: var(--muted); }
.field .control { display: flex; align-items: stretch; }
.field .control input, .field .control select {
  flex: 1; min-width: 0; padding: 6px 8px;
  border: 1px solid var(--line); border-radius: 6px;
  font: inherit; font-size: 13px; background: #fff; color: var(--ink);
}
.field .control input:first-child:not(:last-child) { border-radius: 6px 0 0 6px; }
.field .control input:focus, .field .control select:focus {
  outline: 2px solid rgba(11, 95, 165, .25);
  border-color: var(--accent);
  position: relative; z-index: 1;
}
.field .control .unit {
  display: flex; align-items: center; justify-content: center;
  padding: 0 7px; min-width: 38px; white-space: nowrap;
  border: 1px solid var(--line); border-left: none;
  border-radius: 0 6px 6px 0; background: #f4f7fb;
  color: var(--muted); font-size: 12px;
}
input[type=number]::-webkit-outer-spin-button,
input[type=number]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
input[type=number] { -moz-appearance: textfield; appearance: textfield; }

/* read-only computed values (tendon designation, total area, Pk) */
.computed {
  flex: 1; display: flex; align-items: center; padding: 6px 9px;
  border: 1px dashed var(--line); border-radius: 6px;
  background: #f4f7fb; font-weight: 600; font-size: 13px;
  font-variant-numeric: tabular-nums; min-height: 31px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* geometry schematic (section B) */
.schematic {
  margin: 12px auto 0; padding: 8px 10px 6px;
  border: 1px dashed var(--line); border-radius: 8px; background: #fbfdff;
  max-width: none;
}
.schematic svg { width: 100%; height: auto; display: block; }
.schematic text { font: 11.5px "Segoe UI", system-ui, sans-serif; fill: var(--muted); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 12px; border-radius: 7px;
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
  white-space: nowrap;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-dark); color: #fff; }
.btn.small { padding: 5px 9px; font-weight: 600; font-size: 12.5px; }

/* ---------- tables ---------- */
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl th, .tbl td { border: 1px solid var(--line); padding: 6px 8px; text-align: left; vertical-align: top; }
.tbl thead th { background: #f2f6fb; font-size: 11.5px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); }
.tbl td.num, .tbl th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.tbl tbody tr:nth-child(even) td { background: #fafcfe; }
.tbl td.formula, .tbl th.formula { font-family: var(--mono); font-size: 12px; }
.tbl td.refcol { color: var(--muted); font-size: 11.5px; white-space: nowrap; }

/* ---------- verdict & badges ---------- */
.verdict {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 11px 14px; border-radius: 8px; font-weight: 700; margin: 4px 0 12px;
}
.verdict.ok { background: var(--ok-bg); color: var(--ok); border: 1px solid #bfe3c9; }
.verdict.fail { background: var(--fail-bg); color: var(--fail); border: 1px solid #f2c1be; }
.verdict .detail { font-weight: 500; color: var(--ink); font-size: 12.5px; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11.5px; font-weight: 600; white-space: nowrap; }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.fail { background: var(--fail-bg); color: var(--fail); }
.badge.planned { background: #eef1f5; color: var(--muted); }

/* ---------- notes & errors ---------- */
.note {
  font-size: 12.5px; color: var(--muted);
  background: #f7fafd; border: 1px dashed var(--line);
  border-radius: 8px; padding: 9px 11px; margin: 9px 0 0;
}
.part {
  font-size: 12px; font-weight: 700; letter-spacing: .02em;
  color: var(--accent-dark); margin: 13px 0 3px;
}
/* fields involved in failing checks — red label + ring, to locate the input quickly */
.pane-inputs .field.adjust > label { color: var(--fail); }
.pane-inputs .field.adjust .control input,
.pane-inputs .field.adjust .control select { border-color: var(--fail); box-shadow: 0 0 0 2px var(--fail-bg); }
.errors { display: none; background: var(--fail-bg); border: 1px solid #f2c1be; color: var(--fail); border-radius: 8px; padding: 10px 14px; margin: 12px 0 0; font-size: 13px; }
.errors.show { display: block; }

/* ---------- deliverable sheet — A4 calculation report (preview + print) ---------- */
.sheet {
  width: 210mm;
  max-width: 100%;
  margin: 10px auto 20px;
  background: #fff;
  border: 1px solid #d7dde6;
  border-radius: 3px;
  padding: 13mm 14mm;
  box-shadow: 0 1px 2px rgba(23, 33, 46, .06), 0 20px 44px -28px rgba(23, 33, 46, .5);
  font-size: 12.5px;
}

/* wrapper table — its <thead> (the 4-row title block) repeats on every printed page */
.sheet .doc { width: 100%; border-collapse: collapse; table-layout: fixed; }
.sheet .doc > thead > tr > td,
.sheet .doc > tbody > tr > td { border: 0; padding: 0; background: none; vertical-align: top; }
.sheet .doc > thead > tr > td { padding-bottom: 12px; }

/* 4-row title block: project / calculation / designed by + date / checked by + date */
.titleblock { width: 100%; border: 1.4px solid #2f3b4c; border-collapse: collapse; font-size: 12px; }
.titleblock th, .titleblock td { border: 1px solid #b9c2cd; padding: 4px 8px; vertical-align: top; }
.titleblock th { background: #f2f5f9; text-align: left; font-weight: 600; font-size: 11px; color: #46566f; white-space: nowrap; }
.titleblock td.tb-main { font-weight: 600; }
.titleblock td.tb-c { text-align: center; font-variant-numeric: tabular-nums; }
.titleblock .tb-sub { color: var(--muted); font-weight: 400; }
.titleblock .tb-case { color: var(--accent-dark); font-weight: 400; }

.sheet h3 { font-size: 14px; margin: 18px 0 6px; padding-bottom: 2px; border-bottom: 1.4px solid #2f3b4c; }
.sheet .ref { font-size: 12px; color: var(--muted); margin: 0 0 8px; }
.sheet .sec-note { font-size: 12px; color: #3a4759; margin: 2px 0 9px; }

/* report figures — copies of the input-pane schematics */
.rpt-fig { margin: 6px 0 10px; break-inside: avoid; page-break-inside: avoid; }
.rpt-fig-body { border: 1px solid #dfe5ec; border-radius: 2px; padding: 4px 6px; }
.rpt-fig-body svg { width: 100%; height: auto; display: block; }
.rpt-fig-body text { font: 11.5px "Segoe UI", system-ui, sans-serif; fill: var(--muted); }
.rpt-fig figcaption { font-size: 11px; color: var(--muted); margin-top: 4px; text-align: center; }

/* narrative calculation steps — "formula = substitution = result (clause)" */
.steps { margin: 4px 0 0; }
.step { margin: 0 0 8px; break-inside: avoid; page-break-inside: avoid; }
.step-t { font-size: 12px; font-weight: 600; color: #2c3a4c; }
.step-e { font-family: var(--mono); font-size: 12px; color: #1d2836; margin-top: 1px; padding-left: 16px; }
.step-e .sb { color: #3f4d60; }
.step-e .rs { font-weight: 700; color: #000; }
.step-e .rf { font-family: inherit; font-size: 11px; color: var(--muted); }

/* design data — chapter style: sub-numbered groups, one datum per line */
.dd-g { margin: 0 0 9px; }
.dd-g-t { font-size: 12px; font-weight: 600; color: #2c3a4c; }
.dd-line { font-family: var(--mono); font-size: 12px; color: #1d2836; padding-left: 16px; margin-top: 1px; }
.dd-line .dd-v { font-weight: 600; }

/* check outcome strip — demand vs capacity + verdict */
.outcome { border: 1px solid #b9c2cd; border-left-width: 3px; border-radius: 2px; margin: 9px 0 4px; padding: 5px 9px 6px; font-size: 12px; break-inside: avoid; page-break-inside: avoid; }
.outcome.ok { border-left-color: #1d8a4a; }
.outcome.fail { border-left-color: var(--fail); }
.outcome .oc-r { display: grid; grid-template-columns: 76px 1fr; gap: 6px; padding: 1px 0; }
.outcome .oc-k { color: var(--muted); font-size: 10.5px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; padding-top: 2px; }
.outcome .oc-check { border-top: 1px dashed #c8d0da; margin-top: 3px; padding-top: 4px; }
.outcome .oc-op, .outcome .oc-arrow { color: var(--muted); }
.outcome .oc-verdict { font-weight: 800; letter-spacing: .02em; }
.outcome.ok .oc-verdict { color: #1d8a4a; }
.outcome.fail .oc-verdict { color: var(--fail); }
.outcome .oc-fix { color: var(--fail); margin-top: 3px; }
.sheet .notes { margin: 6px 0 0; padding-left: 20px; font-size: 12px; color: #3a4759; }
.sheet .notes li { margin: 4px 0; }
.sheet-foot { margin-top: 18px; font-size: 11px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 6px; }

/* ---------- tool hub (landing page) ---------- */
.tools { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin: 14px 0; }
@media (max-width: 820px) { .tools { grid-template-columns: 1fr; } }
.tool-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 16px; display: flex; flex-direction: column; gap: 10px;
  box-shadow: 0 1px 2px rgba(23, 33, 46, .05);
}
.tool-card h3 { margin: 0; font-size: 15.5px; }
.tool-card p { margin: 0; color: var(--muted); font-size: 13px; flex: 1; }

.foot { margin-top: 26px; color: var(--muted); font-size: 12.5px; }

/* ---------- print — A4 report ---------- */
@media print {
  @page { size: A4; margin: 12mm 13mm 14mm; }
  body { background: #fff; font-size: 10.5px; color: #000; }
  .no-print { display: none !important; }
  .page { max-width: none; padding: 0; }
  .layout { display: block; }
  .pane-preview { border: none; }
  .sheet { width: auto; max-width: none; margin: 0; padding: 0; border: none; box-shadow: none; border-radius: 0; font-size: 10.5px; }
  .sheet .doc > thead > tr > td { padding-bottom: 9px; }
  .titleblock { font-size: 10.5px; border-color: #222; }
  .titleblock th { background: #ececec; color: #000; font-size: 9.5px; }
  .titleblock th, .titleblock td { border-color: #777; padding: 3px 6px; }
  .tbl { font-size: 10px; }
  .tbl th, .tbl td { padding: 2px 5px; border-color: #999; }
  .tbl thead th { background: #ececec; color: #000; }
  /* column headers repeat on each page of a table that spans pages */
  .tbl thead { display: table-header-group; }
  .tbl tbody tr:nth-child(even) td { background: #f8f8f8; }
  .tbl tr { break-inside: avoid; }
  .sheet h3 { font-size: 11pt; margin: 12px 0 4px; }
  .sheet h3, .sheet .ref { break-after: avoid; }
  .titleblock, .verdict, .sheet-foot { break-inside: avoid; }
  .verdict { border: 1px solid #666; padding: 6px 10px; }
  .step-t { font-size: 10.5px; }
  .step-e { font-size: 10px; }
  .dd-g-t { font-size: 10.5px; }
  .dd-line { font-size: 10px; }
  .sheet .sec-note { font-size: 10px; }
  .outcome { font-size: 10px; border-color: #777; }
  .outcome.ok .oc-verdict { color: #000; }
  .sheet .notes li { margin: 3px 0; }
  .sheet-foot { margin-top: 10px; font-size: 10px; }
  .rpt-fig-body { border-color: #999; }
  .rpt-fig figcaption { font-size: 10px; }
  a { color: inherit; text-decoration: none; }
}