:root {
  --ink: #111;
  --sub: #555;
  --line: #ddd;
  --bg: #fff;
  --accent: #111;
  --note-bg: #f6f6f4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eee;
    --sub: #aaa;
    --line: #333;
    --bg: #121212;
    --accent: #eee;
    --note-bg: #1c1c1c;
  }
  .manual img.diagram { background: #fff; }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  font-size: 16px;
  line-height: 1.85;
}
a { color: var(--ink); }

.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }

header.site {
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
}
header.site .brand {
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
}

footer.site {
  border-top: 1px solid var(--line);
  margin-top: 64px;
  padding: 24px 0 40px;
  color: var(--sub);
  font-size: 13px;
}

/* 閉店のお知らせ */
.notice { padding: 56px 0 24px; }
.notice h1 { font-size: 22px; line-height: 1.5; margin: 0 0 24px; }
.notice p { margin: 0 0 16px; }
.notice .manual-link {
  display: inline-block;
  margin-top: 24px;
  padding: 12px 20px;
  border: 1px solid var(--accent);
  text-decoration: none;
  font-weight: 700;
}

/* 説明書 */
.manual h1.title { font-size: 24px; line-height: 1.5; margin: 40px 0 8px; }
.manual .lead { color: var(--sub); margin: 0 0 24px; font-size: 14px; }
.manual img { max-width: 100%; height: auto; display: block; margin: 16px auto; }
.manual img.hero { width: 100%; }
.manual nav.toc { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 16px 0; margin: 24px 0 8px; font-size: 14px; }
.manual nav.toc ol { margin: 0; padding-left: 0; list-style: none; columns: 2; column-gap: 24px; }
.manual nav.toc li { break-inside: avoid; }
@media (max-width: 480px) { .manual nav.toc ol { columns: 1; } }
.manual section { border-top: 1px solid var(--line); padding-top: 8px; margin-top: 40px; }
.manual h2 { font-size: 20px; line-height: 1.5; margin: 16px 0 16px; }
.manual h3 { font-size: 17px; line-height: 1.5; margin: 28px 0 8px; }
.manual h4 { font-size: 16px; margin: 20px 0 4px; }
.manual p { margin: 0 0 12px; }
.manual ul, .manual ol { margin: 0 0 12px; padding-left: 1.4em; }
.manual .video { margin: 16px 0 20px; }
.manual .video iframe { display: block; width: 100%; aspect-ratio: 16 / 9; height: auto; border: 0; }
.manual .check {
  background: var(--note-bg);
  padding: 16px 20px;
  margin: 24px 0;
}
.manual .check h2 { font-size: 17px; margin: 0 0 8px; }
.manual .note { color: var(--sub); font-size: 14px; }
.manual dl.spec { display: grid; grid-template-columns: 9em 1fr; gap: 4px 16px; margin: 0 0 12px; }
.manual dl.spec dt { color: var(--sub); }
.manual dl.spec dd { margin: 0; }
.manual .contact { background: var(--note-bg); padding: 16px 20px; margin-top: 24px; }
.manual .contact p { margin: 0 0 4px; }