:root {
  --bg: #f4f2ee; --panel: #ffffff; --ink: #1c2026; --sub: #5d6470; --line: #d9d5cc;
  --accent: #c45a00; --accent-ink: #ffffff; --navy: #18263a; --mark: #1d5fbf; --err: #b3261e; --warn-bg: #fff4e0;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14181e; --panel: #1d232b; --ink: #e8eaee; --sub: #a3abb7; --line: #323b46;
    --accent: #ff9a3c; --accent-ink: #1a1206; --navy: #0d141f; --mark: #6ea8ff; --err: #ff8a80; --warn-bg: #3a2c14;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #14181e; --panel: #1d232b; --ink: #e8eaee; --sub: #a3abb7; --line: #323b46;
  --accent: #ff9a3c; --accent-ink: #1a1206; --navy: #0d141f; --mark: #6ea8ff; --err: #ff8a80; --warn-bg: #3a2c14;
  color-scheme: dark;
}
* { 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, "Hiragino Sans", "Noto Sans JP", sans-serif; }
a { color: var(--accent); }
.top { background: var(--navy); color: #fff; padding: 14px 16px 12px; }
.brand { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.logo { font-size: 24px; font-weight: 800; letter-spacing: .04em; }
.by { font-size: 13px; opacity: .7; }
.lead { margin: 4px 0 0; font-size: 14px; opacity: .9; }

.tabs { display: flex; gap: 6px; padding: 10px 16px; overflow-x: auto; background: var(--panel); border-bottom: 1px solid var(--line); }
.tabs button { flex: 0 0 auto; border: 1px solid var(--line); background: var(--bg); color: var(--ink); border-radius: 10px; padding: 8px 14px; text-align: left; cursor: pointer; font: inherit; }
.tabs button b { display: block; font-size: 15px; }
.tabs button small { display: block; font-size: 12px; color: var(--sub); }
.tabs button[aria-selected="true"] { border-color: var(--accent); background: var(--accent); color: var(--accent-ink); }
.tabs button[aria-selected="true"] small { color: inherit; opacity: .85; }

.wrap { display: grid; grid-template-columns: minmax(280px, 360px) 1fr; gap: 16px; padding: 16px; max-width: 1400px; margin: 0 auto; }
.wrap1 { max-width: 1400px; margin: 0 auto; padding: 0 16px; }
@media (max-width: 860px) { .wrap { grid-template-columns: 1fr; } }
.side, .view { min-width: 0; }
.fig { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 8px; color: var(--ink); }
.fig svg { display: block; width: 100%; height: auto; max-height: 230px; }
.fig .f { fill: none; stroke: currentColor; stroke-width: 2; }
.fig .d { fill: none; stroke: var(--accent); stroke-width: 1.4; }
.fig .t { font: 600 15px system-ui, sans-serif; fill: var(--accent); }
.fig .t.s13 { font-size: 13px; }
.fig .t.s12 { font-size: 12px; opacity: .8; }
.fig .g { fill: none; stroke: currentColor; stroke-width: 1; stroke-dasharray: 4 4; opacity: .5; }
.form { margin-top: 12px; display: grid; gap: 10px; }
.field { display: grid; gap: 2px; }
.field > span:first-child { font-size: 14px; font-weight: 600; }
.inp { display: flex; align-items: center; background: var(--panel); border: 1px solid var(--line); border-radius: 8px; }
.inp:focus-within { border-color: var(--accent); outline: 2px solid color-mix(in srgb, var(--accent) 30%, transparent); }
.inp input { flex: 1; min-width: 0; border: 0; background: transparent; color: var(--ink); font: inherit; font-size: 18px; padding: 8px 10px; }
.inp input:focus { outline: none; }
.inp em { font-style: normal; color: var(--sub); padding: 0 10px; font-size: 14px; }
.field small, .opt small { color: var(--sub); font-size: 12px; line-height: 1.5; }
.opt { border: 0; padding: 0; margin: 0; }
.opt legend { font-size: 14px; font-weight: 600; padding: 0; margin-bottom: 4px; }
.seg { display: flex; flex-wrap: wrap; gap: 6px; }
.seg label { position: relative; }
.seg input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.seg span { display: inline-block; border: 1px solid var(--line); background: var(--panel); border-radius: 8px; padding: 6px 12px; font-size: 14px; }
.seg input:checked + span { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, var(--panel)); font-weight: 700; }
.seg input:focus-visible + span { outline: 2px solid var(--accent); }

.err { background: color-mix(in srgb, var(--err) 12%, var(--panel)); color: var(--err); border: 1px solid var(--err); border-radius: 10px; padding: 10px 12px; margin: 0 0 12px; font-weight: 600; }
.warn p { background: var(--warn-bg); border-radius: 10px; padding: 8px 12px; margin: 0 0 10px; font-size: 14px; }
.boards { display: grid; grid-template-columns: 2fr 1fr; gap: 12px; }
@media (max-width: 1100px) { .boards { grid-template-columns: 1fr; } }
.board { margin: 0; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.board figcaption { font-size: 13px; color: var(--sub); padding: 8px 12px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 6px; }
.legend { display: inline-flex; align-items: center; gap: 6px; }
.legend i { display: inline-block; width: 22px; height: 0; border-top: 2px solid var(--ink); }
.legend i.lm { border-top: 2px dashed var(--mark); margin-left: 8px; }
#pattern svg { display: block; width: 100%; height: auto; max-height: 62vh; }
#pattern .cut { fill: color-mix(in srgb, var(--accent) 7%, transparent); stroke: var(--ink); stroke-width: 1.6px; vector-effect: non-scaling-stroke; }
#pattern .mark { fill: none; stroke: var(--mark); stroke-width: 1px; stroke-dasharray: 6 4; vector-effect: non-scaling-stroke; }
#pattern .plabel { fill: var(--accent); font-weight: 800; }
#pattern .psize { fill: var(--sub); }
#wire { display: block; width: 100%; height: 280px; color: var(--ink); touch-action: none; cursor: grab; }
.view.stale .boards { opacity: .35; }

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
button { font: inherit; }
.actions button, .dlg button { border: 1px solid var(--line); background: var(--panel); color: var(--ink); border-radius: 10px; padding: 10px 16px; cursor: pointer; font-weight: 600; }
.actions button.primary, .dlg button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.actions button:hover { filter: brightness(1.05); }

.info { width: 100%; border-collapse: collapse; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; font-size: 14px; }
.info th, .info td { text-align: left; padding: 7px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.info th { width: 40%; color: var(--sub); font-weight: 600; }
.tables details { margin-top: 10px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; }
.tables summary { cursor: pointer; padding: 10px 12px; font-weight: 700; }
.tw { overflow-x: auto; }
.grid { border-collapse: collapse; font-size: 13px; width: 100%; font-variant-numeric: tabular-nums; }
.grid th, .grid td { border-top: 1px solid var(--line); padding: 5px 10px; text-align: right; white-space: nowrap; }
.grid th { color: var(--sub); font-weight: 600; }
.grid td:first-child, .grid th:first-child { text-align: left; }
.foot { font-size: 13px; color: var(--sub); padding: 0 12px 8px; margin: 0; }

.about { margin-top: 8px; }
.about h2 { font-size: 18px; }
.about ul { padding-left: 1.2em; font-size: 14px; color: var(--ink); }
.about li { margin: 4px 0; }
.foot1 { padding-bottom: 32px; font-size: 14px; color: var(--sub); }
.foot1 .small { font-size: 12px; }
.dlg { border: 1px solid var(--line); border-radius: 14px; background: var(--panel); color: var(--ink); max-width: 440px; width: calc(100% - 32px); }
.dlg::backdrop { background: rgb(0 0 0 / .45); }

#print-root { display: none; }
@page { size: A4 portrait; margin: 10mm; }
@media print {
  body.printing > *:not(#print-root) { display: none !important; }
  body.printing { background: #fff; color: #000; }
  body.printing #print-root { display: block; }
  .page { page-break-after: always; break-after: page; font: 10pt/1.45 system-ui, "Hiragino Sans", sans-serif; color: #000; }
  .page:last-child { page-break-after: auto; break-after: auto; }
  .page h1 { font-size: 14pt; margin: 0 0 2mm; }
  .page h2 { font-size: 11pt; margin: 4mm 0 1mm; }
  .page .sum { margin: 0 0 3mm; font-size: 9pt; }
  .page .howto { margin: 0 0 4mm; padding-left: 5mm; font-size: 9.5pt; }
  .page .map svg { display: block; margin: 0 auto 4mm; }
  .thead { font-size: 8.5pt; height: 7mm; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .thead span { color: #555; }
  .tile { display: block; }
  .ruler { display: block; margin-top: 1mm; }
  .overview svg { display: block; margin: 0 auto 3mm; }
  .overview table { border-collapse: collapse; font-size: 8.5pt; }
  .overview .info th, .overview .info td { border: 1px solid #999; padding: 1mm 2mm; text-align: left; }
  .overview .grid th, .overview .grid td { border: 1px solid #999; padding: .6mm 1.5mm; text-align: right; }
  .overview .note { font-size: 9pt; color: #444; }
}