:root {
  --bg: #f4f5f2;
  --card: #ffffff;
  --ink: #1c2321;
  --sub: #5c6763;
  --line: #d9ddd8;
  --accent: #1f6f5c;
  --accent-ink: #ffffff;
  --warn-bg: #fdecea;
  --warn-ink: #8c1d18;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151918;
    --card: #1f2523;
    --ink: #e8ecea;
    --sub: #a2ada9;
    --line: #37403d;
    --accent: #4fb39a;
    --accent-ink: #0d1614;
    --warn-bg: #45201d;
    --warn-ink: #ffd9d5;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Hiragino Sans", "Yu Gothic UI", "Noto Sans JP", sans-serif;
  line-height: 1.6;
}
.top, main { max-width: 980px; margin: 0 auto; padding: 0 16px; }
.top { padding-top: 20px; }
h1 { margin: 0; font-size: 1.5rem; }
.lead { margin: 4px 0 16px; color: var(--sub); font-size: 0.92rem; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
}
.drop {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 32px 16px; text-align: center; cursor: pointer;
  border: 2px dashed var(--line); border-radius: 10px;
}
.drop strong { font-size: 1.1rem; color: var(--accent); }
.drop span { color: var(--sub); font-size: 0.88rem; }
.drop.over { border-color: var(--accent); }
.row { margin-top: 12px; }
.note, .hint { color: var(--sub); font-size: 0.85rem; margin: 8px 0 0; }
progress { width: 100%; height: 12px; accent-color: var(--accent); }
.error { background: var(--warn-bg); color: var(--warn-ink); }

button, select {
  font: inherit; color: var(--ink);
  background: var(--card); border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 14px; min-height: 40px; cursor: pointer;
}
button.on, button.primary {
  background: var(--accent); color: var(--accent-ink); border-color: var(--accent);
}
button.quiet { border-color: transparent; color: var(--sub); }
button:disabled { opacity: 0.5; cursor: default; }

.toolbar { position: sticky; top: 0; z-index: 5; display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: center; }
.group { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.group-label { font-size: 0.8rem; color: var(--sub); }
.hint { flex-basis: 100%; margin: 0; }
.options { flex-basis: 100%; }
.options summary { cursor: pointer; color: var(--sub); font-size: 0.9rem; }
.options label { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 10px; font-size: 0.92rem; }
.options > button { margin-top: 10px; }
.flip { direction: rtl; }

.page {
  position: relative; margin: 0 auto 16px;
  background: #fff; border: 1px solid var(--line);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}
.page canvas { display: block; width: 100%; height: auto; touch-action: pan-y pinch-zoom; }
.page canvas.tool-blank { cursor: cell; }
.page canvas.tool-fix { cursor: text; }
/* 範囲指定は縦にもなぞるので、その間は canvas 上でのスクロールを止める */
.page canvas.tool-box { cursor: crosshair; touch-action: none; }
.page .fix-input {
  position: absolute; z-index: 2;
  font-family: inherit; color: #111; background: #fff;
  border: 2px solid #1f6f5c; border-radius: 4px; padding: 0 4px;
  min-width: 80px;
}
.export { display: flex; flex-wrap: wrap; gap: 8px; }
/* 設定を開いている間は固定を外し、プリントが隠れないようにする */
.toolbar:has(details[open]) { position: static; }