:root {
  --bg: #f7f6f2; --panel: #ffffff; --ink: #1d2024; --muted: #5c636b; --line: #d9d6cc;
  --accent: #0b6e4f; --accent-ink: #ffffff; --accent-soft: #e2f1ea; --warn: #9a3412; --warn-bg: #fdeede;
  --sheet: #efe9db; --pl: 80%; --focus: #1d4ed8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171a; --panel: #1d2125; --ink: #e8eaed; --muted: #a0a8b0; --line: #353b41;
    --accent: #3ec28f; --accent-ink: #08130e; --accent-soft: #17302a; --warn: #fdba74; --warn-bg: #3a2414;
    --sheet: #262b30; --pl: 32%; --focus: #8ab4ff;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
header.site { border-bottom: 1px solid var(--line); background: var(--panel); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 10px; padding-bottom: 10px; flex-wrap: wrap; }
.brand { font-weight: 800; letter-spacing: -.02em; font-size: 1.15rem; color: var(--ink); text-decoration: none; display: inline-flex; align-items: center; gap: 8px; }
.brand svg { width: 24px; height: 24px; }
nav.top a { margin-left: 14px; font-size: .95rem; }
h1 { font-size: clamp(1.5rem, 4vw, 2.1rem); line-height: 1.2; margin: 24px 0 6px; letter-spacing: -.02em; }
h2 { font-size: 1.35rem; margin: 32px 0 8px; line-height: 1.3; }
h3 { font-size: 1.1rem; margin: 22px 0 6px; }
.lead { color: var(--muted); margin: 0 0 16px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; margin: 14px 0; }
.card h2 { margin-top: 0; font-size: 1.1rem; }
.grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
label { font-size: .85rem; color: var(--muted); display: block; margin-bottom: 2px; }
input[type=text], input[type=number], select, textarea {
  width: 100%; font: inherit; padding: 7px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink); min-height: 38px;
}
input[type=checkbox] { width: 20px; height: 20px; accent-color: var(--accent); }
.tbl-wrap { overflow-x: auto; }
table.edit { border-collapse: collapse; width: 100%; min-width: 560px; }
table.edit th { text-align: left; font-size: .8rem; font-weight: 600; color: var(--muted); padding: 0 4px 4px; white-space: nowrap; }
table.edit td { padding: 3px 4px; vertical-align: middle; }
table.edit td.c { text-align: center; }
.btn { font: inherit; font-size: .95rem; padding: 8px 14px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); cursor: pointer; min-height: 40px; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.btn.small { padding: 4px 10px; min-height: 32px; font-size: .85rem; }
.btn.del { padding: 4px 9px; min-height: 32px; color: var(--muted); }
.btn.pro::after { content: "PRO"; font-size: .65rem; font-weight: 700; margin-left: 6px; padding: 1px 5px; border-radius: 4px; background: var(--accent-soft); color: var(--accent); vertical-align: 1px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-top: 10px; }
.spacer { flex: 1; }
.status { font-size: .9rem; color: var(--muted); min-height: 1.4em; }
.alert { background: var(--warn-bg); color: var(--warn); border: 1px solid var(--warn); border-radius: 8px; padding: 8px 12px; margin: 10px 0; }
.alert ul { margin: 4px 0 0; padding-left: 20px; }
.stats { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); margin: 6px 0 4px; }
.stat { background: var(--accent-soft); border-radius: 8px; padding: 8px 12px; }
.stat b { display: block; font-size: 1.45rem; line-height: 1.2; }
.stat span { font-size: .8rem; color: var(--muted); }
.sheet-card h3 { margin: 0 0 6px; font-size: 1rem; }
svg.diagram { width: 100%; height: auto; display: block; border-radius: 4px; }
svg.diagram .sheetbg { fill: var(--sheet); stroke: var(--muted); stroke-width: 1.5; }
svg.diagram .part { fill: hsl(var(--h) 55% var(--pl)); stroke: var(--ink); stroke-width: 1; cursor: pointer; }
svg.diagram g.p:hover .part, svg.diagram g.p:focus .part, svg.diagram g.p.sel .part { stroke-width: 3; }
svg.diagram g.p:focus { outline: none; }
svg.diagram text { fill: var(--ink); font-family: system-ui, sans-serif; pointer-events: none; }
.caption { font-size: .9rem; color: var(--muted); min-height: 1.5em; margin: 4px 0; }
table.data { border-collapse: collapse; width: 100%; font-size: .9rem; margin-top: 6px; }
table.data th, table.data td { text-align: left; padding: 4px 8px; border-bottom: 1px solid var(--line); }
table.data th { color: var(--muted); font-weight: 600; font-size: .8rem; }
table.data td.n, table.data th.n { text-align: right; font-variant-numeric: tabular-nums; }
details summary { cursor: pointer; font-size: .9rem; color: var(--accent); padding: 4px 0; }
dialog { border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--ink); max-width: min(520px, 92vw); padding: 20px; }
dialog::backdrop { background: rgba(0,0,0,.5); }
dialog h2 { margin-top: 0; font-size: 1.2rem; }
.content { max-width: 760px; }
.content p, .content li { margin: 0 0 12px; }
.content ul, .content ol { padding-left: 22px; }
.content table { border-collapse: collapse; margin: 10px 0 16px; font-size: .95rem; width: 100%; }
.content th, .content td { border: 1px solid var(--line); padding: 5px 9px; text-align: left; }
.content th { background: var(--accent-soft); }
.cta { display: inline-block; background: var(--accent); color: var(--accent-ink); font-weight: 600; padding: 10px 18px; border-radius: 8px; text-decoration: none; margin: 4px 0 12px; }
.callout { background: var(--accent-soft); border-left: 4px solid var(--accent); padding: 10px 14px; border-radius: 4px; margin: 14px 0; }
details.faq { border-bottom: 1px solid var(--line); padding: 8px 0; }
details.faq summary { color: var(--ink); font-weight: 600; }
footer.site { border-top: 1px solid var(--line); margin-top: 40px; padding: 18px 0 30px; color: var(--muted); font-size: .9rem; }
.hide { display: none !important; }
.printhead { display: none; }

@media print {
  @page { margin: 12mm; }
  body { background: #fff; color: #000; font-size: 11pt; }
  header.site, footer.site, .noprint, .content, #tool-inputs, .actions, .caption { display: none !important; }
  .printhead { display: block; font-size: 10pt; margin-bottom: 6px; }
  .card { border: none; padding: 0; margin: 0 0 10px; background: none; }
  .sheet-card { break-inside: avoid; page-break-inside: avoid; }
  svg.diagram, .stat { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  svg.diagram .part { fill: hsl(var(--h) 55% 80%); stroke: #000; }
  svg.diagram .sheetbg { fill: #f1eee4; stroke: #000; }
  svg.diagram text { fill: #000; }
  details { display: block; }
  details > summary { display: none; }
  details:not([open]) > * { display: block; }
}