:root {
  --bg: #f6f1e7;
  --surface: #fffdf8;
  --ink: #2b2622;
  --muted: #6f655b;
  --line: #e2d8c6;
  --accent: #7a3b2e;        /* 臙脂 */
  --accent-ink: #fffdf8;
  --badge: #2f5d50;         /* 深緑 */
  --amazon: #b8651b;
  --rakuten: #9e2a2b;
  --serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1f1b18;
    --surface: #2a2521;
    --ink: #ece4d6;
    --muted: #b3a795;
    --line: #3d362f;
    --accent: #d39a84;
    --accent-ink: #1f1b18;
    --badge: #8cc3b1;
    --amazon: #e3a15c;
    --rakuten: #e38587;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
}
a { color: var(--accent); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

.pr-notice {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  text-align: center;
  padding: 4px 16px;
}

header.site { padding: 28px 0 12px; }
header.site .name {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--ink);
  text-decoration: none;
}
header.site .tagline { margin: 4px 0 0; color: var(--muted); font-size: 13px; }

nav.main { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin-top: 16px; }
nav.main ul, nav.genres ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 18px; }
nav.main ul { padding: 8px 0; font-size: 14px; }
nav.main a, nav.genres a { color: var(--ink); text-decoration: none; }
nav.main a[aria-current], nav.genres a[aria-current] { color: var(--accent); font-weight: 700; }
nav.genres { margin: 20px 0 8px; font-size: 13px; }
nav.genres a { display: inline-block; border: 1px solid var(--line); border-radius: 999px; padding: 2px 12px; background: var(--surface); }

main h1 {
  font-family: var(--serif);
  font-size: 22px;
  margin: 28px 0 4px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}
main .lead { color: var(--muted); font-size: 13px; margin: 6px 0 16px; }

ol.books { list-style: none; margin: 0; padding: 0; counter-reset: rank; }
ol.books > li {
  counter-increment: rank;
  display: grid;
  grid-template-columns: 2.4em 1fr;
  gap: 0 8px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px 16px;
  margin-bottom: 12px;
}
ol.books.ranked > li::before {
  content: counter(rank);
  font-family: var(--serif);
  font-size: 22px;
  color: var(--accent);
  line-height: 1.2;
}
ol.books:not(.ranked) > li { grid-template-columns: 1fr; }
/* 書影がある場合は [順位] [書影] [本文] の 3 列にする */
ol.books > li:has(> .cover) { grid-template-columns: 2.4em 72px 1fr; gap: 0 12px; }
ol.books:not(.ranked) > li:has(> .cover) { grid-template-columns: 72px 1fr; }
.book .cover img { display: block; width: 72px; height: auto; border: 1px solid var(--line); border-radius: 2px; background: var(--bg); }
@media (max-width: 420px) {
  ol.books > li:has(> .cover) { grid-template-columns: 2em 56px 1fr; }
  ol.books:not(.ranked) > li:has(> .cover) { grid-template-columns: 56px 1fr; }
  .book .cover img { width: 56px; }
}
.book h2 { font-family: var(--serif); font-size: 17px; line-height: 1.5; margin: 0; }
.book h2 a { color: var(--ink); text-decoration: none; }
.book h2 a:hover { text-decoration: underline; }
.book .by { margin: 2px 0 0; font-size: 13px; color: var(--muted); }
.book .meta { margin: 6px 0 0; font-size: 12px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 2px 12px; }
.book .hb {
  display: inline-block;
  color: var(--badge);
  font-weight: 700;
  text-decoration: none;
}
.book .buy { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.btn {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 4px;
  text-decoration: none;
  color: #fff;
}
.btn.amazon { background: var(--amazon); }
.btn.rakuten { background: var(--rakuten); }
@media (prefers-color-scheme: dark) { .btn { color: #1f1b18; } }
.buy .ad { font-size: 11px; color: var(--muted); }

.mentions { margin-top: 24px; }
.mentions h2 { font-family: var(--serif); font-size: 16px; margin: 0 0 8px; }
.mentions ul { margin: 0; padding-left: 1.2em; font-size: 14px; }
.mentions li { margin-bottom: 6px; }
.mentions .hb { color: var(--badge); font-weight: 700; font-size: 12px; text-decoration: none; margin-left: 4px; }
.book .meta .hb + .hb { margin-left: 4px; }
.page-body { background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 8px 20px 16px; margin-top: 16px; }
.page-body h2 { font-family: var(--serif); font-size: 17px; margin: 20px 0 4px; }
.draft { background: #fff3cd; color: #5c4400; padding: 8px 12px; border-radius: 4px; font-size: 13px; }

footer.site { margin: 40px 0 0; padding: 20px 0 32px; border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); }
footer.site ul { list-style: none; padding: 0; margin: 0 0 8px; display: flex; flex-wrap: wrap; gap: 4px 16px; }
footer.site a { color: var(--muted); }
footer.site p { margin: 4px 0; }