.lr-bk-hero {
  background: var(--warm); position: relative; overflow: hidden;
  border-bottom: 1px solid var(--hair);
}
.lr-bk-hero__inner {
  max-width: 1200px; margin: 0 auto;
  padding: 56px 24px 64px;
  display: grid; grid-template-columns: 1fr; gap: 48px; align-items: center;
}
.lr-bk-hero__kicker {
  font-family: var(--italic); font-style: italic;
  font-size: 12px; color: var(--accent); letter-spacing: 2px;
  margin-bottom: 22px; white-space: nowrap;
  position: relative; padding-left: 44px;
  display: inline-block;
}
.lr-bk-hero__kicker::before {
  content: ''; position: absolute; left: 0; top: 50%;
  width: 32px; height: 1px; background: var(--accent);
}
.lr-bk-hero h1 {
  font-family: var(--serif);
  font-size: clamp(34px, 5.8vw, 64px);
  line-height: 1.42; font-weight: 500; margin: 0 0 26px;
  letter-spacing: 0.06em; text-wrap: balance;
}
.lr-bk-hero h1 em {
  font-family: var(--italic); font-style: italic; color: var(--fg);
  font-weight: 400;
}
.lr-bk-hero__sub {
  font-family: var(--italic); font-style: italic;
  font-size: 14px; color: var(--sub); letter-spacing: 1px;
  margin: 0 0 32px;
}
.lr-bk-hero__lead {
  font-family: var(--serif); font-size: 15px;
  line-height: 2.1; color: var(--fg);
  letter-spacing: 0.04em; max-width: 480px;
  margin: 0 0 32px;
}
.lr-bk-hero__meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0 0 34px;
  max-width: 560px;
  border-top: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
  font-family: var(--sans); font-size: 12px; color: var(--sub);
  letter-spacing: 1px;
}
.lr-bk-hero__meta div {
  padding: 14px 0;
  border-bottom: 1px solid var(--hair);
}
.lr-bk-hero__meta div:last-child {
  border-bottom: none;
}
.lr-bk-hero__meta b {
  display: block; font-family: var(--italic); font-style: italic;
  font-size: 11px; color: var(--accent); margin-bottom: 5px;
  font-weight: 400; letter-spacing: 1.5px;
}
.lr-bk-hero__cta {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 16px 28px; background: var(--accent); color: var(--bg);
  font-family: var(--sans); font-size: 14px; font-weight: 500;
  letter-spacing: 0.06em; text-decoration: none;
  border-radius: 999px;
  transition: transform 0.15s, box-shadow 0.2s;
}
.lr-bk-hero__cta:hover { transform: translateY(-1px); box-shadow: 0 14px 28px -10px rgba(16,32,58,0.4); }

/* 書影 */
.lr-bk-cover {
  position: relative;
  max-width: 320px; width: 100%; margin: 0 auto;
}
.lr-bk-cover__shadow {
  position: absolute; inset: 12px -10px -16px 10px;
  background: rgba(16,32,58,0.18); filter: blur(20px);
  z-index: 0;
}
.lr-bk-cover--image img {
  position: relative; z-index: 1;
  display: block; width: 100%; height: auto;
  border-radius: 3px;
  box-shadow:
    -2px 0 0 rgba(16,32,58,0.08) inset,
    0 24px 60px -26px rgba(16,32,58,0.45);
  background: var(--card);
}
.lr-bk-cover__face {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(180deg, #FDFDFB 0%, #F0EBE0 100%);
  border: 1px solid var(--hair);
  display: flex; flex-direction: column;
  padding: 40px 28px 28px;
  box-shadow: -2px 0 0 rgba(16,32,58,0.06) inset;
}
.lr-bk-cover__face::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px; background: var(--accent); opacity: 0.85;
}
.lr-bk-cover__face::after {
  content: ''; position: absolute; left: 16px; right: 16px;
  top: 16px; bottom: 16px;
  border: 1px solid var(--hair); pointer-events: none;
}
.lr-bk-cover__title {
  font-family: var(--serif); font-size: 19px; font-weight: 500;
  line-height: 1.55; letter-spacing: 0.06em;
  color: var(--fg); margin: 8px 0 auto;
  writing-mode: vertical-rl; text-orientation: upright;
  max-height: calc(100% - 110px);
}
.lr-bk-cover__author {
  font-family: var(--serif); font-size: 11px;
  color: var(--sub); letter-spacing: 2px;
  text-align: right; margin-top: auto;
}
.lr-bk-cover__author span {
  display: block; font-family: var(--italic); font-style: italic;
  font-size: 10px; color: var(--accent); letter-spacing: 1px;
  margin-bottom: 4px;
}
.lr-bk-cover__pub {
  position: absolute; bottom: 18px; left: 28px;
  font-family: ui-monospace, monospace; font-size: 9px;
  color: var(--sub); letter-spacing: 0.5px;
  z-index: 2;
}

@media (min-width: 768px) {
  .lr-bk-hero__inner {
    padding: 96px 40px 96px;
    grid-template-columns: 1.2fr 1fr; gap: 72px;
  }
  .lr-bk-cover { max-width: 380px; }
  .lr-bk-hero__meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .lr-bk-hero__meta div {
    min-height: 72px;
    padding: 15px 18px;
    border-right: 1px solid var(--hair);
  }
  .lr-bk-hero__meta div:nth-child(3n) {
    border-right: none;
  }
  .lr-bk-hero__meta div:nth-last-child(-n+3) {
    border-bottom: none;
  }
}
@media (min-width: 1100px) {
  .lr-bk-hero__inner { padding: 120px 48px 120px; gap: 96px; }
}

/* 共通セクション */
.lr-bk-sec { padding: 80px 24px; }
.lr-bk-sec.alt { background: var(--accent-soft); }
.lr-bk-sec.warm { background: var(--warm); }
.lr-bk-sec__inner { max-width: 1100px; margin: 0 auto; }
@media (min-width: 900px) { .lr-bk-sec { padding: 110px 48px; } }

.lr-bk-h2 {
  font-family: var(--serif);
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 500; line-height: 1.5; letter-spacing: 0.06em;
  margin: 0 0 32px; text-wrap: balance;
}
.lr-bk-lead {
  font-family: var(--serif); font-size: 15.5px;
  line-height: 2.15; color: var(--fg);
  letter-spacing: 0.04em; max-width: 680px;
}
.lr-bk-lead p { margin: 0 0 1.4em; }
.lr-bk-lead p:last-child { margin-bottom: 0; }
.lr-bk-lead em {
  font-family: var(--italic); font-style: italic; color: var(--accent);
}

/* About: For-whom リスト */
.lr-bk-for {
  display: grid; grid-template-columns: 1fr; gap: 14px;
  margin: 36px 0 0; max-width: 680px;
}
.lr-bk-for__item {
  padding: 18px 22px; background: var(--card);
  border: 1px solid var(--hair);
  display: grid; grid-template-columns: 32px 1fr; gap: 16px; align-items: start;
  font-family: var(--serif); font-size: 14.5px;
  letter-spacing: 0.04em; line-height: 1.85;
}
.lr-bk-for__icn {
  font-family: var(--italic); font-style: italic;
  font-size: 18px; color: var(--accent); line-height: 1.3;
}

/* もくじ */
.lr-bk-toc {
  display: grid; grid-template-columns: 1fr; gap: 0;
  margin: 36px 0 0; max-width: 880px;
  border-top: 1px solid var(--hair);
}
.lr-bk-toc__item {
  display: grid; grid-template-columns: 56px 1fr auto; gap: 24px;
  padding: 22px 0; border-bottom: 1px solid var(--hair);
  align-items: baseline;
}
.lr-bk-toc__num {
  font-family: var(--italic); font-style: italic;
  font-size: 18px; color: var(--accent); letter-spacing: 0.5px;
}
.lr-bk-toc__title {
  font-family: var(--serif); font-size: 16px; font-weight: 500;
  letter-spacing: 0.04em; line-height: 1.6; color: var(--fg);
}
.lr-bk-toc__title small {
  display: block; font-family: var(--sans); font-weight: 400;
  font-size: 12px; color: var(--sub); margin-top: 6px;
  letter-spacing: 0.02em; line-height: 1.7;
}
.lr-bk-toc__page {
  font-family: ui-monospace, monospace; font-size: 11px;
  color: var(--sub); letter-spacing: 0.5px;
}
@media (max-width: 640px) {
  .lr-bk-toc__item { grid-template-columns: 40px 1fr; }
  .lr-bk-toc__page { display: none; }
}

/* 試し読み */
.lr-bk-excerpt {
  display: grid; grid-template-columns: 1fr; gap: 24px; margin: 40px 0 0;
}
.lr-bk-excerpt__card {
  background: var(--card); border: 1px solid var(--hair);
  padding: 36px 32px; position: relative;
}
.lr-bk-excerpt__num {
  position: absolute; top: 18px; right: 24px;
  font-family: var(--italic); font-style: italic;
  font-size: 36px; color: var(--accent); opacity: 0.18; line-height: 1;
}
.lr-bk-excerpt__chap {
  font-family: var(--italic); font-style: italic;
  font-size: 11px; color: var(--accent); letter-spacing: 2px;
  margin-bottom: 18px;
}
.lr-bk-excerpt__body {
  font-family: var(--serif); font-size: 15px; line-height: 2.1;
  color: var(--fg); letter-spacing: 0.04em;
  white-space: pre-line;
}
@media (min-width: 900px) {
  .lr-bk-excerpt { grid-template-columns: 1fr 1fr; gap: 28px; }
}

/* コラム（制作秘話）— 紙の余白の手記 */
.lr-bk-column {
  max-width: 720px; margin: 0 auto; padding: 56px 24px;
  background: transparent; position: relative;
  border-top: 1px dashed var(--hair);
  border-bottom: 1px dashed var(--hair);
}
.lr-bk-column::before {
  content: '✱'; position: absolute; left: 50%; top: -10px;
  transform: translateX(-50%); background: var(--bg);
  padding: 0 12px; color: var(--accent); font-size: 14px;
}
.lr-bk-column__label {
  font-family: var(--italic); font-style: italic;
  font-size: 11px; color: var(--accent); letter-spacing: 3px;
  text-transform: uppercase; margin-bottom: 18px; text-align: center;
}
.lr-bk-column__label small {
  display: block; font-family: var(--serif); font-style: normal;
  font-size: 11px; color: var(--sub); margin-top: 4px; letter-spacing: 2px;
}
.lr-bk-column h3 {
  font-family: var(--italic); font-style: italic;
  font-size: clamp(20px, 2.8vw, 26px);
  color: var(--fg); margin: 0 0 22px; text-align: center;
  letter-spacing: 0.04em; line-height: 1.55; font-weight: 500;
}
.lr-bk-column__body {
  font-family: var(--serif); font-size: 14.5px;
  line-height: 2.1; color: var(--sub);
  letter-spacing: 0.04em; max-width: 600px; margin: 0 auto;
}
.lr-bk-column__body p { margin: 0 0 1.2em; }
.lr-bk-column__body p:last-child { margin-bottom: 0; }
.lr-bk-column__sig {
  margin-top: 24px; text-align: center;
  font-family: var(--italic); font-style: italic;
  font-size: 12px; color: var(--accent); letter-spacing: 1px;
}
.lr-bk-column__sig a {
  color: inherit;
  border-bottom: 1px solid rgba(16,32,58,0.24);
  padding-bottom: 2px;
}
.lr-bk-column.alt {
  background: var(--warm);
  border: none; padding: 64px 32px;
}
.lr-bk-column.alt::before {
  background: var(--warm);
}

/* 著者紹介 */
.lr-bk-author {
  display: grid; grid-template-columns: 1fr; gap: 32px; align-items: center;
  margin: 40px 0 0;
}
.lr-bk-author__photo {
  aspect-ratio: 1/1; max-width: 220px; width: 100%;
  background:
    linear-gradient(135deg, rgba(16,32,58,0.06), rgba(16,32,58,0.18)),
    repeating-linear-gradient(135deg, #D9D4C5 0 1px, #CFC9B8 1px 9px);
  border-radius: 50%;
  display: flex; align-items: flex-end; justify-content: center; padding-bottom: 14px;
}
.lr-bk-author__photo span {
  font-family: ui-monospace, monospace; font-size: 10px;
  color: var(--sub); background: var(--bg); padding: 3px 8px; letter-spacing: 0.5px;
}
.lr-bk-author__photo--kakehata img {
  object-position: 50% 48%;
}
.lr-bk-author__photo--maeda img {
  object-position: 50% 50%;
}
.lr-bk-author__body h3 {
  font-family: var(--serif); font-size: 22px; font-weight: 500;
  margin: 0 0 6px; letter-spacing: 0.06em;
}
.lr-bk-author__body h3 span {
  font-family: var(--italic); font-style: italic;
  font-size: 14px; color: var(--accent); margin-left: 12px;
}
.lr-bk-author__body p {
  font-family: var(--serif); font-size: 14px; line-height: 2;
  color: var(--sub); letter-spacing: 0.04em; margin: 0 0 18px;
}
.lr-bk-author__more {
  font-family: var(--italic); font-style: italic;
  font-size: 13px; color: var(--accent); letter-spacing: 1px;
  border-bottom: 1px solid var(--accent); padding-bottom: 2px;
}
@media (min-width: 768px) {
  .lr-bk-author { grid-template-columns: 220px 1fr; gap: 56px; }
}

/* 読者の声 */
.lr-bk-voices {
  display: grid; grid-template-columns: 1fr; gap: 20px; margin: 40px 0 0;
}
.lr-bk-voice {
  padding: 28px 28px; background: var(--card);
  border: 1px solid var(--hair);
}
.lr-bk-voice__body {
  font-family: var(--serif); font-size: 14.5px; line-height: 2;
  color: var(--fg); letter-spacing: 0.04em; white-space: pre-line;
}
.lr-bk-voice__cite {
  margin-top: 18px; padding-top: 14px;
  border-top: 1px solid var(--hair);
  font-family: var(--italic); font-style: italic;
  font-size: 12px; color: var(--sub); letter-spacing: 1px;
}
.lr-bk-voice__cite a {
  color: inherit;
  border-bottom: 1px solid rgba(16,32,58,0.18);
  padding-bottom: 2px;
}
@media (min-width: 900px) { .lr-bk-voices { grid-template-columns: repeat(3, 1fr); gap: 20px; } }

/* 購入動線 */
.lr-bk-buy {
  display: grid; grid-template-columns: 1fr; gap: 16px; margin: 36px 0 0;
}
.lr-bk-buy--single { max-width: 640px; }
.lr-bk-buy__lead {
  font-family: var(--serif); font-size: 15px;
  line-height: 2; color: var(--sub);
  letter-spacing: 0.04em; max-width: 620px;
  margin: -8px 0 0;
}
.lr-bk-buy__item {
  display: grid; grid-template-columns: 1fr auto; gap: 16px; align-items: center;
  padding: 24px 28px; background: var(--card);
  border: 1px solid var(--hair); text-decoration: none; color: inherit;
  transition: border-color 0.2s, transform 0.15s;
}
.lr-bk-buy__item:hover { border-color: var(--accent); transform: translateX(4px); }
.lr-bk-buy__shop {
  font-family: var(--serif); font-size: 16px; font-weight: 500;
  letter-spacing: 0.06em; line-height: 1.5;
}
.lr-bk-buy__shop small {
  display: block; font-family: var(--italic); font-style: italic;
  font-size: 11px; color: var(--sub); margin-top: 4px; letter-spacing: 1px;
}
.lr-bk-buy__price {
  font-family: ui-monospace, monospace; font-size: 13px;
  color: var(--sub); letter-spacing: 0.5px;
}
.lr-bk-buy__price b {
  display: block; font-family: var(--serif); font-size: 16px;
  color: var(--fg); margin-bottom: 2px;
}
@media (min-width: 768px) {
  .lr-bk-buy { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
  .lr-bk-buy--single { grid-template-columns: 1fr; }
}

/* 次の導線 */
.lr-bk-next {
  display: grid; grid-template-columns: 1fr; gap: 16px;
  margin: 40px 0 0;
}
.lr-bk-next__item {
  display: flex; flex-direction: column;
  min-height: 220px;
  background: var(--card); border: 1px solid var(--hair);
  padding: 28px 24px; color: inherit; text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.lr-bk-next__item:hover {
  transform: translateY(-2px);
  border-color: rgba(16,32,58,0.18);
  box-shadow: 0 16px 36px -16px rgba(16,32,58,0.18);
}
.lr-bk-next__en {
  font-family: var(--italic); font-style: italic;
  font-size: 12px; color: var(--accent);
  letter-spacing: 1.5px; margin-bottom: 18px;
}
.lr-bk-next__item h3 {
  font-family: var(--serif); font-size: 19px;
  line-height: 1.55; font-weight: 500;
  letter-spacing: 0.06em; margin: 0 0 14px;
}
.lr-bk-next__item p {
  font-family: var(--sans); font-size: 13px;
  line-height: 1.9; color: var(--sub);
  letter-spacing: 0.02em; margin: 0 0 22px;
}
.lr-bk-next__item span {
  margin-top: auto;
  font-family: var(--italic); font-style: italic;
  font-size: 12px; color: var(--accent);
  letter-spacing: 1px;
}
@media (min-width: 900px) {
  .lr-bk-next { grid-template-columns: repeat(3, 1fr); gap: 20px; }
}