:root {
  --bg: #f3f1ea; --card: #fffdf8; --ink: #1b2420; --muted: #5d6862; --line: #d9d5c8;
  --accent: #1f5c4a; --accent-ink: #ffffff; --accent-soft: #dcebe4; --warn: #8a4b0f; --warn-soft: #f6e7d2;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111614; --card: #18201d; --ink: #e6ece8; --muted: #9eaaa4; --line: #2b3632;
    --accent: #6cc3a3; --accent-ink: #0f1513; --accent-soft: #1b3129; --warn: #f0b070; --warn-soft: #33261a;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #111614; --card: #18201d; --ink: #e6ece8; --muted: #9eaaa4; --line: #2b3632;
  --accent: #6cc3a3; --accent-ink: #0f1513; --accent-soft: #1b3129; --warn: #f0b070; --warn-soft: #33261a;
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 var(--sans); }
a { color: var(--accent); }
.wrap { max-width: 860px; margin: 0 auto; padding-inline: 16px; }
.top { background: var(--card); border-bottom: 1px solid var(--line); padding-block: 28px 0; padding-top: calc(28px + env(safe-area-inset-top, 0px)); }
.kicker { margin: 0; font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
h1 { margin: 6px 0 8px; font-size: clamp(28px, 6vw, 38px); line-height: 1.1; text-wrap: balance; }
h2 { margin: 0 0 14px; font-size: 20px; line-height: 1.25; text-wrap: balance; }
h3 { margin: 0 0 8px; font-size: 16px; }
.lede { margin: 0 0 18px; color: var(--muted); max-width: 62ch; }
.tabs { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; margin-inline: -16px; padding-inline: 16px; }
.tabs::-webkit-scrollbar { display: none; }
.tabs button { flex: none; font: 600 15px var(--sans); color: var(--muted); background: none; border: 0; border-bottom: 3px solid transparent; padding: 12px 12px 10px; cursor: pointer; min-height: 44px; }
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.tabs button:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
main { padding-block: 18px 48px; display: grid; gap: 16px; }
.legal { margin: 0; padding: 10px 14px; background: var(--warn-soft); color: var(--ink); border-radius: 10px; font-size: 14px; }
.panel { display: grid; gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px; min-width: 0; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 16px; }
.span2 { grid-column: 1 / -1; }
label { display: grid; gap: 4px; font-size: 14px; font-weight: 500; color: var(--muted); min-width: 0; }
label.check { display: flex; align-items: center; gap: 8px; color: var(--ink); min-height: 44px; }
input, select { font: 16px var(--sans); color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 10px; min-height: 44px; width: 100%; min-width: 0; }
input[type="checkbox"] { width: 20px; height: 20px; min-height: 0; accent-color: var(--accent); }
input:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.note { color: var(--muted); font-size: 14px; margin: 0 0 12px; }
.btn { margin-top: 14px; font: 600 15px var(--sans); background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 10px; padding: 12px 18px; min-height: 44px; cursor: pointer; }
.result { display: grid; gap: 14px; }
.big { display: grid; gap: 2px; }
.big .label { font-size: 13px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.big .value { font-family: var(--mono); font-size: clamp(22px, 5vw, 30px); font-weight: 500; color: var(--accent); font-variant-numeric: tabular-nums; }
.pair { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }
.tbl { width: 100%; border-collapse: collapse; font-size: 15px; }
.tbl th, .tbl td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl td.d { font-family: var(--mono); white-space: nowrap; font-variant-numeric: tabular-nums; }
.scroll { overflow-x: auto; }
.rules { margin: 0; padding-left: 18px; font-size: 14px; color: var(--muted); display: grid; gap: 4px; }
.warn { padding: 10px 12px; background: var(--warn-soft); border-radius: 10px; font-size: 14px; }
.err { color: var(--warn); font-weight: 600; }
.forms { list-style: none; margin: 0 0 14px; padding: 0; display: grid; gap: 10px; }
.forms li { display: grid; grid-template-columns: 7em 1fr; gap: 10px; align-items: baseline; }
.forms code { font-family: var(--mono); font-size: 14px; color: var(--accent); }
.foot { color: var(--muted); font-size: 13px; }
details summary { cursor: pointer; font-weight: 600; font-size: 14px; color: var(--muted); }

/* inspection sheet */
.sheet { display: grid; gap: 14px; }
.sheet .room { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; break-inside: avoid; }
.sheet table { width: 100%; border-collapse: collapse; font-size: 14px; }
.sheet th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); padding: 4px; }
.sheet td { border-top: 1px solid var(--line); padding: 7px 4px; }
.sheet td.box { width: 13%; border-left: 1px solid var(--line); }
.sheet .codes { font-size: 13px; color: var(--muted); }
.sheet .sign { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; font-size: 14px; }
.sheet .line { border-bottom: 1px solid var(--ink); height: 28px; }

@media (max-width: 560px) {
  .grid { grid-template-columns: 1fr; }
  .tabs button { padding-inline: 9px; font-size: 14px; }
  .forms li { grid-template-columns: 1fr; gap: 0; }
  .sheet td.box { width: 18%; }
}

@media print {
  :root { --bg: #fff; --card: #fff; --ink: #000; --muted: #333; --line: #999; }
  body { font-size: 11px; }
  .top, .legal, .foot, .no-print, .panel:not(#p-inspect) { display: none !important; }
  #p-inspect { display: grid !important; }
  .sheet { display: block; }
  .sheet .room { display: block; border: 1px solid #999; border-radius: 0; padding: 6px; margin: 0 0 8px; break-inside: auto; }
  .sheet .room h3 { break-after: avoid; margin-bottom: 2px; }
  .sheet tr { break-inside: avoid; }
  .sheet td { padding: 4px; }
  .sheet th:first-child { width: 30%; }
  .sheet td.box:nth-child(2n) { width: 8%; }
  .sheet td.box:nth-child(2n+1) { width: 27%; }
  .sheet .note { font-size: 10px; }
  @page { size: letter; margin: 0.4in; }
}