/* ─────────────────────────────────────────
   リセット・ベース
───────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:      #FAF6F0;
  --bg-alt:  #F0E8D8;
  --main:    #C8622A;
  --dark:    #2D2015;
  --darkest: #1C1108;
  --sub:     #7A6858;
  --border:  #DDD4C4;
  --sans:    'Inter', 'Noto Sans JP', sans-serif;
  --serif:   'Shippori Mincho', serif;
}

html {
  font-size: 17px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  color: var(--dark);
  background: var(--bg);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}


/* ─────────────────────────────────────────
   共通
───────────────────────────────────────── */
.section-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 96px 48px;
}

.section-heading {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: 0.06em;
  font-feature-settings: 'palt';
  margin-bottom: 60px;
  position: relative;
}

.section-heading::after {
  content: '';
  display: block;
  width: 28px;
  height: 3px;
  background: currentColor;
  margin: 12px auto 0;
  opacity: 0.35;
}

.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reviews-grid .fade-in:nth-child(2) { transition-delay: 0.12s; }
.reviews-grid .fade-in:nth-child(3) { transition-delay: 0.24s; }


/* ─────────────────────────────────────────
   ファーストビュー
───────────────────────────────────────── */
.fv {
  min-height: 100svh;
  min-height: 100vh;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  border-left: 5px solid var(--main);
  padding: 80px 48px 100px 48px;
}

.fv-inner {
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 64px;
}

.fv-text {
  flex: 1;
  min-width: 0;
}

.badges {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.badge {
  display: inline-block;
  background: var(--main);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 4px 14px;
  letter-spacing: 0.06em;
  border-radius: 3px;
}

.badge i {
  margin-right: 5px;
  font-size: 0.85em;
}

.catch {
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(2rem, 5vw, 3.625rem);
  line-height: 1.45;
  letter-spacing: 0.03em;
  font-feature-settings: 'palt';
  color: var(--dark);
  margin-bottom: 28px;
}

.subcatch {
  font-size: 1.2rem;
  font-family: var(--serif);
  color: var(--dark);
  line-height: 1.75;
  letter-spacing: 0.04em;
  margin-bottom: 28px;
  padding-left: 14px;
  border-left: 2px solid var(--border);
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.fv-bookinfo {
  font-size: 0.875rem;
  color: var(--sub);
  line-height: 1.85;
  letter-spacing: 0.02em;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.fv-bookinfo strong {
  font-weight: 700;
  color: var(--dark);
}

.fv-book {
  flex-shrink: 0;
}

.book-cover {
  width: 280px;
  box-shadow: 12px 18px 48px rgba(45, 32, 21, 0.28);
}

.scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
}

.scroll-arrow {
  display: block;
  width: 22px;
  height: 22px;
  border-right: 2.5px solid var(--main);
  border-bottom: 2.5px solid var(--main);
  animation: scroll-bounce 1.6s ease-in-out infinite;
}

.scroll-arrow:nth-child(2) {
  animation-delay: 0.08s;
  margin-top: -10px;
}

@keyframes scroll-bounce {
  0%, 100% {
    opacity: 0.5;
    transform: translateY(0) rotate(45deg);
  }
  50% {
    opacity: 1;
    transform: translateY(8px) rotate(45deg);
  }
}


/* ─────────────────────────────────────────
   レビュー（ダーク背景）
───────────────────────────────────────── */
.reviews {
  background: var(--dark);
}

.reviews .section-heading {
  color: var(--bg);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.review-card {
  background: var(--bg);
  padding: 32px 26px 26px;
  display: flex;
  flex-direction: column;
  border-radius: 4px;
  box-shadow: 0 4px 20px rgba(45, 32, 21, 0.10);
}

.stars {
  color: var(--main);
  font-size: 0.875rem;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.review-card blockquote {
  font-size: 0.9rem;
  line-height: 2;
  color: var(--dark);
  flex: 1;
  margin-bottom: 20px;
}

.review-card blockquote::before {
  content: '\201C';
  font-family: var(--serif);
  font-size: 3.5rem;
  color: var(--main);
  opacity: 0.35;
  line-height: 0;
  vertical-align: -0.4em;
  margin-right: 0.05em;
  display: inline-block;
}

.reviewer {
  font-size: 0.8125rem;
  color: var(--sub);
  text-align: right;
  letter-spacing: 0.05em;
}

.book-quote {
  margin-top: 20px;
  background: var(--bg-alt);
  border-left: 4px solid var(--main);
  border-radius: 4px;
  padding: 24px 28px;
  display: flex;
  align-items: baseline;
  gap: 20px;
}

.book-quote-label {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--main);
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: 0.06em;
}

.book-quote-text {
  font-size: 0.9rem;
  color: var(--dark);
  line-height: 2;
  flex: 1;
}

.book-quote-attr {
  font-size: 0.8125rem;
  color: var(--sub);
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: 0.05em;
}


/* ─────────────────────────────────────────
   この本について
───────────────────────────────────────── */
.about {
  background: var(--bg);
}

.author-block {
  display: flex;
  gap: 40px;
  align-items: flex-start;
  margin-bottom: 56px;
}

.author-photo {
  width: 160px;
  height: 196px;
  object-fit: cover;
  object-position: top center;
  flex-shrink: 0;
  border-radius: 6px;
}

.author-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
  line-height: 1.5;
}

.author-kana {
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.06em;
}

.author-title {
  font-size: 0.8125rem;
  color: var(--main);
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}

.author-bio {
  font-size: 0.9375rem;
  line-height: 2.1;
  color: var(--sub);
}

.book-desc {
  margin-bottom: 52px;
}

.book-desc p {
  font-size: 1.0625rem;
  line-height: 2.25;
  margin-bottom: 1.6em;
  color: var(--dark);
  font-feature-settings: 'palt';
}

.book-desc p:last-child {
  margin-bottom: 0;
}

.toc {
  border-top: 1px solid var(--border);
  padding-top: 40px;
}

.toc-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 32px;
}

.toc-list li {
  font-size: 0.9375rem;
  line-height: 1.65;
  padding: 13px 0;
  border-bottom: 1px solid var(--border);
  color: var(--sub);
  display: flex;
  gap: 12px;
  align-items: baseline;
}

.toc-ch {
  color: var(--main);
  font-size: 0.8125rem;
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: 0.04em;
}

.pull-quote-band {
  background: var(--dark);
  padding: 80px 48px;
  text-align: center;
}

.pull-quote-text {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 600;
  color: var(--bg);
  line-height: 1.5;
  letter-spacing: 0.06em;
  margin-bottom: 20px;
}

.pull-quote-text::before {
  content: '\201C';
  font-family: var(--serif);
  font-size: 5rem;
  color: var(--main);
  opacity: 0.5;
  line-height: 0;
  vertical-align: -0.45em;
  margin-right: 0.05em;
  display: inline-block;
}

.pull-quote-attr {
  font-size: 0.875rem;
  color: rgba(250, 246, 240, 0.5);
  letter-spacing: 0.08em;
}


/* ─────────────────────────────────────────
   試し読み
───────────────────────────────────────── */
.trial {
  background: var(--main);
}

.trial .section-heading {
  color: #fff;
}

.trial .section-heading::after {
  background: rgba(255, 255, 255, 0.5);
}

.trial-desc {
  text-align: center;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
  font-feature-settings: 'palt';
  margin-top: -40px;
  margin-bottom: 24px;
}

.trial-sub {
  text-align: center;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9375rem;
  letter-spacing: 0.06em;
  margin-top: -10px;
  margin-bottom: 10px;
}

.trial-btn {
  display: block;
  width: fit-content;
  margin: 0 auto 32px;
  padding: 18px 64px;
  background: #fff;
  color: var(--main);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  border-radius: 4px;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.trial-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(45, 32, 21, 0.22);
}

.trial-btn i {
  margin-left: 8px;
  font-size: 0.85em;
}

.trial-note {
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
}


/* ─────────────────────────────────────────
   購入
───────────────────────────────────────── */
.purchase {
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.purchase .section-inner {
  padding-top: 80px;
  padding-bottom: 80px;
}

.purchase-block {
  display: flex;
  gap: 72px;
  align-items: flex-start;
}

.purchase-cover-frame {
  flex-shrink: 0;
  background: var(--bg-alt);
  padding: 60px 60px;
  border: 1px solid var(--border);
}

.purchase-cover {
  width: 240px;
  display: block;
  box-shadow: 6px 10px 28px rgba(45, 32, 21, 0.22);
}

.purchase-author {
  font-size: 0.875rem;
  color: var(--sub);
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.purchase-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 900;
  color: var(--dark);
  letter-spacing: 0.03em;
  font-feature-settings: 'palt';
  line-height: 1.35;
  margin-bottom: 8px;
}

.purchase-subtitle {
  font-size: 0.9375rem;
  color: var(--sub);
  letter-spacing: 0.04em;
  line-height: 1.7;
  margin-bottom: 24px;
}

.purchase-desc {
  font-size: 1rem;
  line-height: 1.95;
  color: var(--dark);
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.purchase-price {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--dark);
  letter-spacing: 0.04em;
  margin-bottom: 28px;
}

.purchase-btns {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btn-purchase {
  display: block;
  padding: 17px 32px;
  text-align: center;
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: 4px;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.btn-purchase:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(45, 32, 21, 0.18);
}

.btn-purchase i {
  margin-left: 8px;
  font-size: 0.8em;
}

.btn-amazon {
  background: #FF9900;
  color: #fff;
}

.btn-rakuten {
  background: #BF0000;
  color: #fff;
}


/* ─────────────────────────────────────────
   シェア
───────────────────────────────────────── */
.share-section {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}

.share-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 64px 48px;
  text-align: center;
}

.share-text {
  font-family: var(--serif);
  font-size: 1.3rem;
  color: var(--dark);
  letter-spacing: 0.08em;
  line-height: 1.6;
  margin-bottom: 32px;
}

.share-btns {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* FacebookボタンのiframeラッパーのベースラインをXボタンに揃える */
.fb_iframe_widget {
  line-height: 1;
}


/* ─────────────────────────────────────────
   フッター
───────────────────────────────────────── */
.footer {
  background: #fff;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.footer-logo-wrap {
  display: flex;
  justify-content: center;
}

.footer-logo {
  width: 100px;
  height: auto;
  display: block;
}

.copyright {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--sub);
  letter-spacing: 0.06em;
}

.copyright a {
  color: var(--sub);
  border-bottom: 1px solid var(--border);
  transition: color 0.2s;
}

.copyright a:hover {
  color: var(--dark);
}


/* ─────────────────────────────────────────
   レスポンシブ（〜767px）
───────────────────────────────────────── */
@media (max-width: 767px) {

  html {
    font-size: 16px;
  }

  .section-inner {
    padding: 72px 24px;
  }

  .section-heading {
    font-size: 1.75rem;
    margin-bottom: 44px;
  }

  .fv {
    border-left: none;
    border-top: 5px solid var(--main);
    padding: 56px 24px 80px;
    justify-content: flex-start;
  }

  .fv-inner {
    flex-direction: column-reverse;
    gap: 32px;
    align-items: center;
  }

  .fv-text {
    width: 100%;
  }

  .badges {
    justify-content: center;
  }

  .catch {
    font-size: clamp(1.75rem, 7vw, 2.25rem);
    text-align: center;
  }

  .subcatch {
    font-size: 1.05rem;
    text-align: center;
    border-left: none;
    padding-left: 0;
  }

  .book-cover {
    width: 160px;
  }

  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .author-block {
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }

  .author-photo {
    width: 120px;
    height: 148px;
  }

  .author-name,
  .author-title {
    text-align: center;
  }

  .toc-list {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .pull-quote-band {
    padding: 64px 24px;
  }

  .trial-btn {
    width: 100%;
    text-align: center;
  }

  .purchase-block {
    flex-direction: column;
    gap: 0;
    align-items: stretch;
  }

  .purchase-cover-frame {
    padding: 32px;
    text-align: center;
  }

  .purchase-cover {
    width: 160px;
    margin: 0 auto;
  }

  .purchase-info {
    padding-top: 40px;
    width: 100%;
  }

  .btn-purchase {
    width: 100%;
  }

  .book-quote {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: start;
    gap: 4px 16px;
  }

  .book-quote-label {
    grid-row: 1;
    grid-column: 1;
    padding-top: 3px;
  }

  .book-quote-text {
    grid-row: 1;
    grid-column: 2;
  }

  .book-quote-attr {
    grid-row: 2;
    grid-column: 2;
    text-align: right;
    white-space: normal;
  }

  .share-inner {
    padding: 48px 24px;
  }

  .footer-inner {
    padding: 24px;
    gap: 10px;
  }

  .footer-logo {
    width: 80px;
  }

}