:root {
  color-scheme: light;
  --bg: #f6f1e7;
  --card: #fffdf9;
  --ink: #2b2622;
  --sub: #6c635a;
  --line: #e2d8c8;
  --beni: #b3122a;
  --beni-dark: #8c0e21;
  --warn-bg: #fff3e0;
  --warn-ink: #7a4300;
  --radius: 10px;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", Meiryo, sans-serif;
  line-height: 1.75;
  font-size: 16px;
}
a { color: var(--beni-dark); }
a:hover { color: var(--beni); }

.site-head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 10px 20px; background: var(--card); border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--ink); text-decoration: none; }
.site-head nav { display: flex; gap: 16px; font-size: 15px; }
.site-head nav a { text-decoration: none; color: var(--sub); }
.site-head nav a[aria-current] { color: var(--beni-dark); font-weight: 700; }

.app, .doc { max-width: 1180px; margin: 0 auto; padding: 20px 16px 40px; }
.intro h1 { font-size: clamp(22px, 3.2vw, 30px); margin: 4px 0 6px; line-height: 1.4; }
.intro p { margin: 0 0 18px; color: var(--sub); max-width: 52em; }

.workspace { display: grid; grid-template-columns: 340px 1fr; gap: 20px; align-items: start; }
@media (max-width: 860px) {
  .workspace { grid-template-columns: 1fr; }
  .preview { order: -1; position: static; }
}

.panel-form {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; display: flex; flex-direction: column; gap: 10px;
}
fieldset { border: 0; margin: 0; padding: 0 0 10px; border-bottom: 1px dashed var(--line); display: flex; flex-direction: column; gap: 8px; min-width: 0; }
legend { font-weight: 700; padding: 0; margin-bottom: 6px; display: flex; align-items: center; gap: 8px; }
.step {
  display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%;
  background: var(--beni); color: #fff; font-size: 13px;
}
label { display: flex; flex-direction: column; font-size: 13px; color: var(--sub); gap: 2px; min-width: 0; }
label.check { flex-direction: row; align-items: center; gap: 6px; color: var(--ink); font-size: 14px; }
select, input[type=text], textarea {
  font: inherit; font-size: 16px; width: 100%; padding: 7px 9px; color: var(--ink);
  border: 1px solid #cfc3b0; border-radius: 7px; background: #fff;
}
textarea { resize: vertical; line-height: 1.5; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; align-items: end; }
.hint { margin: 0; font-size: 13px; color: var(--sub); }
.link-btn { align-self: flex-start; background: none; border: 0; padding: 0; color: var(--beni-dark); text-decoration: underline; font: inherit; font-size: 13px; cursor: pointer; }

.warnings { margin: 0; padding: 10px 12px 10px 28px; background: var(--warn-bg); color: var(--warn-ink); border-radius: 8px; font-size: 14px; }
.warnings li + li { margin-top: 4px; }

.actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.btn {
  font: inherit; font-weight: 700; padding: 11px 10px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--beni); background: #fff; color: var(--beni-dark);
}
.btn.primary { background: var(--beni); color: #fff; }
.btn:hover { filter: brightness(0.95); }
.pdf-help { font-size: 14px; background: #f3efe6; padding: 8px 10px; border-radius: 8px; }
.tips { font-size: 14px; }
.tips summary { cursor: pointer; color: var(--beni-dark); }
.tips ul { padding-left: 20px; margin: 6px 0 0; }

.ad-slot:empty { display: none; }
.ad-slot { margin-top: 8px; }

.preview { min-width: 0; position: sticky; top: 12px; }
.stage {
  background: #e9e1d2; border-radius: var(--radius); padding: 18px 12px;
  display: flex; justify-content: center; overflow: hidden;
}
.sheet-frame { position: relative; box-shadow: 0 2px 10px rgba(60, 40, 20, .18); background: #fff; }
.sheet-scaler { transform-origin: 0 0; position: absolute; left: 0; top: 0; }
.preview-note { font-size: 13px; color: var(--sub); text-align: center; margin: 6px 0 0; }

.howto { max-width: 52em; margin-top: 28px; }
.howto h2 { font-size: 20px; }

/* ── のし紙そのもの ── */
.sheet { position: relative; background: #fff; overflow: hidden; }
.sheet-slot { position: absolute; }
.ns-panel { position: relative; overflow: hidden; background: #fff; }
.ns-panel.ns-cut { outline: 0.25mm dashed #b8b0a4; }
.ns-art { position: absolute; left: 0; top: 0; display: block; }
.ns-col {
  position: absolute;
  writing-mode: vertical-rl;
  text-orientation: upright;
  -webkit-text-orientation: upright;
  line-height: 1;
  white-space: nowrap;
  color: #111;
  font-feature-settings: "vert" 1;
}
.ns-font-brush .ns-col { font-family: "Yuji Syuku", "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif; }
.ns-font-mincho .ns-col { font-family: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif; font-weight: 600; }

/* ── マナー解説ページ ── */
.doc { max-width: 820px; }
.doc h1 { font-size: clamp(22px, 3.2vw, 30px); line-height: 1.4; }
.doc h2 { font-size: 21px; margin-top: 36px; padding-bottom: 4px; border-bottom: 2px solid var(--line); }
.doc h3 { font-size: 17px; margin-top: 22px; }
.notice { background: var(--card); border-left: 4px solid var(--beni); padding: 10px 14px; border-radius: 6px; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; background: var(--card); font-size: 15px; }
th, td { border: 1px solid var(--line); padding: 7px 9px; text-align: left; vertical-align: top; }
th { background: #f1e9db; white-space: nowrap; }
.src { font-size: 13px; color: var(--sub); }
.sources li { margin-bottom: 6px; font-size: 14px; }

.site-foot { border-top: 1px solid var(--line); padding: 18px 16px 30px; font-size: 13px; color: var(--sub); text-align: center; }
.site-foot p { margin: 4px auto; max-width: 60em; }

/* ── 印刷 ── */
@media print {
  html, body { background: #fff !important; margin: 0 !important; padding: 0 !important; }
  .no-print, .site-head, .site-foot, .intro, .howto, .panel-form, .preview-note { display: none !important; }
  .app { padding: 0 !important; margin: 0 !important; max-width: none !important; }
  .workspace { display: block !important; }
  .preview { position: static !important; }
  .stage { padding: 0 !important; background: none !important; display: block !important; border-radius: 0 !important; overflow: visible !important; }
  .sheet-frame { box-shadow: none !important; width: auto !important; height: auto !important; }
  .sheet-scaler { position: static !important; transform: none !important; width: auto !important; }
  .sheet { break-after: avoid; page-break-after: avoid; }
  * { -webkit-print-color-adjust: exact !important; print-color-adjust: exact !important; }
}