/* ============================================================
   TOKUマンガ情報 — カスタムCSS
   Bootstrap 5 の上にブランドスタイルを重ねる
   Design tokens: Google AdSense design system
   ============================================================ */

/* Google Fonts – Roboto */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap');

html { font-size: 112.5%; } /* 1rem = 18px */

/* ------------------------------------------------------------
   デザイントークン
   ------------------------------------------------------------ */
:root {
  /* Text */
  --color-text-primary:   #3c4043;
  --color-text-secondary: #5f6368;
  --color-text-link:      #1a73e8;
  --color-text-inverse:   #202124;

  /* Surface */
  --color-surface-muted:  #ffffff;
  --color-surface-raised: #e8f0fe;
  --color-body-bg:        #f8f9fa;

  /* Brand functional (price/sale) */
  --color-primary:       #1a73e8;  /* Google blue */
  --color-primary-dark:  #1557b0;
  --color-sale:          #d93025;
  --color-points:        #1e8e3e;
  --color-ku-k:          #FF9900;
  --color-ku-u:          #5f6368;
  --color-muted:         #9aa0a6;

  /* Radius */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 50px;

  /* Motion */
  --motion-instant: 150ms;
  --motion-fast:    200ms;
  --motion-normal:  280ms;
}

/* ------------------------------------------------------------
   ベース
   ------------------------------------------------------------ */
body {
  font-family: Roboto, Arial, sans-serif;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  background-color: var(--color-body-bg);
  color: var(--color-text-primary);
}

/* Bootstrap primaryカラーをGoogle blueで上書き */
.text-primary   { color: var(--color-primary) !important; }
.bg-primary     { background-color: var(--color-primary) !important; }
.border-primary { border-color: var(--color-primary) !important; }
.btn-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  transition: background var(--motion-instant), border-color var(--motion-instant);
}
.btn-primary:hover, .btn-primary:focus-visible {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
}
.btn-outline-primary {
  color: var(--color-primary);
  border-color: var(--color-primary);
  border-radius: var(--radius-sm);
}
.btn-outline-primary:hover,
.btn-outline-primary.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.nav-pills .nav-link.active {
  background-color: var(--color-primary);
  border-radius: var(--radius-md);
}
.nav-pills .nav-link {
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--motion-instant);
}
.nav-pills .nav-link:hover { color: var(--color-primary); }
.page-link { color: var(--color-primary); }
.page-item.active .page-link {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

/* Focus-visible (WCAG 2.2 AA) */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ------------------------------------------------------------
   ヘッダー
   ------------------------------------------------------------ */
.site-header {
  background: var(--color-surface-muted);
  border-bottom: 1px solid #e0e0e0;
}
.site-logo {
  color: var(--color-text-primary);
  font-weight: 700;
  font-size: 1.125rem;
  text-decoration: none;
  transition: color var(--motion-instant);
}
.site-logo:hover { color: var(--color-primary); }

.sort-link {
  display: inline-block;
  padding: 10px 12px;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--motion-instant);
}
.sort-link:hover, .sort-link.active {
  color: var(--color-primary);
  font-weight: 700;
}

/* ------------------------------------------------------------
   書籍カード (.book-card)
   ------------------------------------------------------------ */
.book-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  color: inherit;
  background: var(--color-surface-muted);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(60,64,67,.15), 0 1px 3px rgba(60,64,67,.1);
  transition: box-shadow var(--motion-fast);
}
.book-card:hover {
  box-shadow: 0 1px 3px rgba(60,64,67,.2), 0 4px 8px rgba(60,64,67,.15);
  color: inherit;
}

/* 表紙画像エリア */
.book-cover {
  position: relative;
  aspect-ratio: 3 / 4;
  background: #f1f3f4;
  overflow: hidden;
}
.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: top;
  transition: transform var(--motion-normal);
}
.book-card:hover .book-cover img {
  transform: scale(1.05);
}
.book-cover-noimage {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  font-size: 0.8125rem;
}

/* テキストエリア */
.book-body {
  padding: 8px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.book-series {
  font-size: 0.625rem;
  color: var(--color-muted);
  margin-bottom: 2px;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}
.book-title {
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.3;
  color: var(--color-text-primary);
  margin-bottom: 4px;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.book-author {
  font-size: 0.625rem;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}
.book-price-area {
  margin-top: auto;
  padding-top: 4px;
}

/* ------------------------------------------------------------
   価格 (.price-*)
   ------------------------------------------------------------ */
.price-current {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-sale);
}
.price-current-lg {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-sale);
}
.price-original {
  font-size: 0.625rem;
  color: var(--color-muted);
  text-decoration: line-through;
}
.price-points {
  font-size: 0.625rem;
  color: var(--color-points);
}
.price-points-sm {
  font-size: 0.75rem;
  color: var(--color-points);
  font-weight: 700;
}
.price-real {
  display: inline-block;
  font-size: 0.625rem;
  font-weight: 700;
  color: #fff;
  background: var(--color-points);
  padding: 1px 5px;
  border-radius: var(--radius-xs);
  line-height: 1.4;
}
.price-real-lg {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: #fff;
  background: var(--color-points);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  line-height: 1.4;
}

/* ------------------------------------------------------------
   バッジ (.badge-*)
   ------------------------------------------------------------ */
.badge-discount {
  position: absolute;
  top: 4px;
  left: 4px;
  background: var(--color-sale);
  color: #fff;
  font-size: 0.625rem;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: var(--radius-xs);
  line-height: 1.2;
}
.badge-ku {
  position: absolute;
  top: 4px;
  right: 4px;
  background: rgba(255,255,255,.9);
  font-size: 0.5rem;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: var(--radius-xs);
  letter-spacing: -.01em;
  line-height: 1.2;
}
.badge-ku .ku-k { color: var(--color-ku-k); }
.badge-ku .ku-u { color: var(--color-ku-u); }

.badge-points {
  position: absolute;
  bottom: 4px;
  left: 4px;
  background: var(--color-points);
  color: #fff;
  font-size: 0.625rem;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: var(--radius-xs);
  line-height: 1.2;
}

/* ------------------------------------------------------------
   コーナーセクション (.corner-*)
   ------------------------------------------------------------ */
.corner-section { margin-bottom: 2rem; }
.corner-heading {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-inverse);
  margin-bottom: 12px;
}
.corner-deadline {
  font-size: 0.8125rem;
  color: var(--color-sale);
  font-weight: 500;
}
.corner-heading-link {
  color: var(--color-text-inverse) !important;
  text-decoration: none;
  transition: color var(--motion-instant);
}
.corner-heading-link:hover { color: var(--color-primary) !important; }
.corner-more-btn {
  font-size: 0.8125rem;
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition: color var(--motion-instant);
}
.corner-more-btn:hover { color: var(--color-primary-dark); }
.corner-row {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}
.corner-row::-webkit-scrollbar { display: none; }

/* コーナー内の書籍カード */
.corner-card {
  flex-shrink: 0;
  width: 9rem;
}
.corner-card .book-body { padding: 6px; }
.corner-card .book-title { font-size: 0.6875rem; }
.corner-card .price-current { font-size: 0.8125rem; }

/* 続きを見るボタン */
.corner-more {
  flex-shrink: 0;
  width: 5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.625rem;
  text-align: center;
  transition: color var(--motion-instant);
}
.corner-more:hover { color: var(--color-primary-dark); }
.corner-more-arrow { font-size: 1.5rem; line-height: 1; }

/* ------------------------------------------------------------
   書籍グリッド
   ------------------------------------------------------------ */
.books-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 576px) { .books-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 768px) { .books-grid { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 992px) { .books-grid { grid-template-columns: repeat(5, 1fr); } }
@media (min-width: 1200px){ .books-grid { grid-template-columns: repeat(6, 1fr); } }

.books-grid-narrow {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, 1fr);
}
@media (min-width: 576px) { .books-grid-narrow { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 768px) { .books-grid-narrow { grid-template-columns: repeat(5, 1fr); } }

/* ------------------------------------------------------------
   KU テキストロゴ（書籍詳細ページ）
   ------------------------------------------------------------ */
.ku-logo { letter-spacing: -.01em; }
.ku-logo .ku-k { color: var(--color-ku-k); }
.ku-logo .ku-u { color: var(--color-ku-u); }

/* ------------------------------------------------------------
   シリーズ一覧カード
   ------------------------------------------------------------ */
.series-card { flex-shrink: 0; width: 5rem; text-align: center; }
.series-card img { aspect-ratio: 3 / 4; object-fit: contain; object-position: top; border-radius: var(--radius-xs); box-shadow: 0 1px 2px rgba(60,64,67,.2); }
.series-card.current img { outline: 2px solid var(--color-primary); outline-offset: 1px; }
.series-card.on-sale img { outline: 2px solid #fbbc04; outline-offset: 1px; }
.series-card.no-sale img { opacity: .6; }
.series-card.no-sale:hover img { opacity: 1; }

/* ------------------------------------------------------------
   パンくずリスト
   ------------------------------------------------------------ */
.breadcrumb { font-size: 0.8125rem; }
.breadcrumb-item + .breadcrumb-item::before { color: var(--color-muted); }

/* ------------------------------------------------------------
   出版社一覧カード
   ------------------------------------------------------------ */
.publisher-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-surface-muted);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 2px rgba(60,64,67,.15);
  padding: 8px 12px;
  text-decoration: none;
  color: inherit;
  transition: box-shadow var(--motion-fast);
}
.publisher-card:hover {
  box-shadow: 0 1px 3px rgba(60,64,67,.2), 0 4px 8px rgba(60,64,67,.1);
  color: var(--color-primary);
}
.publisher-name {
  font-size: 0.875rem;
  font-weight: 500;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.publisher-count { font-size: 0.8125rem; color: var(--color-muted); flex-shrink: 0; margin-left: 8px; }
.publisher-count .on-sale { color: var(--color-primary); font-weight: 700; }

/* ------------------------------------------------------------
   書籍詳細ページ
   ------------------------------------------------------------ */
.book-meta-link:hover { color: var(--color-primary) !important; }

/* ------------------------------------------------------------
   値下げ履歴リスト
   ------------------------------------------------------------ */
.drop-history-date  { color: var(--color-primary); font-weight: 700; }
.drop-history-arrow { color: var(--color-primary); font-weight: 700; }

/* ------------------------------------------------------------
   トップへ戻るFAB
   ------------------------------------------------------------ */
#fab-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--color-primary);
  color: #fff;
  font-size: 1.125rem;
  line-height: 1;
  box-shadow: 0 1px 3px rgba(60,64,67,.3), 0 4px 8px rgba(60,64,67,.15);
  cursor: pointer;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--motion-fast), transform var(--motion-fast), background var(--motion-instant);
  pointer-events: none;
}
#fab-top.fab-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
#fab-top:hover { background: var(--color-primary-dark); }

/* ------------------------------------------------------------
   書籍リスト表示（sale日別ページ）
   ------------------------------------------------------------ */
.books-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.book-list-item {
  display: flex;
  gap: 20px;
  padding: 20px;
  background: var(--color-surface-muted);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 2px rgba(60,64,67,.15), 0 1px 3px rgba(60,64,67,.1);
}
.book-list-cover {
  flex-shrink: 0;
  width: 7.5rem;
  position: relative;
}
.book-list-cover img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-xs);
  box-shadow: 0 1px 3px rgba(60,64,67,.25);
}
.book-list-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.book-list-title {
  display: block;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-primary);
  text-decoration: none;
  line-height: 1.5;
}
.book-list-title:hover { color: var(--color-primary); }
.book-list-series {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin: 0;
}
.book-list-series-link {
  color: var(--color-text-secondary);
  text-decoration: none;
}
.book-list-series-link:hover { color: var(--color-primary); }
.book-list-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.book-list-meta-link {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  text-decoration: none;
}
.book-list-meta-link:hover { color: var(--color-primary); }
.book-list-meta-text {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-muted);
}
.book-list-real {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.8125rem;
  font-weight: 700;
  color: #fff;
  background: var(--color-points);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
}
.book-list-ku {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1;
}
.book-list-ku .ku-k { color: var(--color-ku-k); }
.book-list-ku .ku-u { color: var(--color-ku-u); }
.book-list-ku-badge {
  display: inline-block;
  align-self: flex-start;
  background: #e53935;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-xs);
}
.book-list-or {
  display: block;
  font-size: 0.75rem;
  color: var(--color-muted);
}
.book-list-discount-badge {
  display: inline-block;
  align-self: flex-start;
  background: var(--color-sale);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-xs);
}
.book-list-price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.4;
}
.book-list-price strong {
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--color-sale);
}
.book-list-list-price {
  font-size: 0.875rem;
  color: var(--color-muted);
  text-decoration: line-through;
}
.book-list-points {
  display: block;
  font-size: 0.875rem;
  color: var(--color-points);
  font-weight: 500;
}
.btn-amazon {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #FFD814;
  color: #0F1111;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 13px 20px;
  min-height: 48px;
  border-radius: 6px;
  text-decoration: none;
  width: fit-content;
  border: 1px solid #FCD200;
  transition: background var(--motion-instant);
}
.btn-amazon:hover { background: #F7CA00; color: #0F1111; }
.btn-share {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #fff;
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 13px 16px;
  min-height: 48px;
  border-radius: 6px;
  border: 1px solid var(--color-border, #d0d0d0);
  cursor: pointer;
  transition: background var(--motion-instant), border-color var(--motion-instant);
}
.btn-share:hover { background: var(--color-surface-muted); border-color: var(--color-text-secondary); }
.btn-amazon-a {
  font-size: 1.125rem;
  font-weight: 700;
  font-style: italic;
  color: #FF9900;
}
.book-list-updated {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

@media (max-width: 575px) {
  .book-list-item { gap: 14px; padding: 14px; }
  .book-list-cover { width: 6rem; }
  .book-list-title { font-size: 1rem; }
  .book-list-price strong { font-size: 1.375rem; }
  .book-list-body { gap: 8px; }
  .btn-amazon {
    padding: 15px 24px;
    font-size: 1rem;
    box-shadow: 0 2px 8px rgba(255,153,0,.35);
    width: 100%;
    justify-content: center;
  }
  .site-header .container-xl.d-flex {
    flex-wrap: wrap;
  }
  .site-search {
    order: 3;
    max-width: none !important;
    width: 100%;
    margin-left: 0 !important;
  }
}

/* ------------------------------------------------------------
   説明テキストブロック (.sale-intro)
   ------------------------------------------------------------ */
.sale-intro {
  font-size: .875rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  background: var(--color-surface-muted);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 2px rgba(60,64,67,.15), 0 1px 3px rgba(60,64,67,.1);
  padding: 16px 20px;
}
.sale-intro p { margin-bottom: .5rem; }
.sale-intro p:last-child { margin-bottom: 0; }
.sale-intro strong { color: var(--color-text-primary); }
.sale-intro a { color: var(--color-primary); text-decoration: none; }
.sale-intro a:hover { text-decoration: underline; }

/* ------------------------------------------------------------
   シリーズ一覧 (.series-list-card)
   ------------------------------------------------------------ */
.series-list-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--color-surface-muted);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 2px rgba(60,64,67,.15), 0 1px 3px rgba(60,64,67,.1);
  padding: 10px;
  text-decoration: none;
  color: inherit;
  transition: box-shadow var(--motion-fast);
}
.series-list-card:hover { box-shadow: 0 2px 6px rgba(60,64,67,.2), 0 2px 8px rgba(60,64,67,.12); color: inherit; }
.series-list-card-img {
  width: 3.5rem;
  height: 5rem;
  object-fit: contain;
  border-radius: 4px;
  flex-shrink: 0;
}
.series-list-card-noimg {
  width: 3.5rem;
  height: 5rem;
  background: #e8eaed;
  border-radius: 4px;
  flex-shrink: 0;
}
.series-list-card-body { flex: 1; min-width: 0; }
.series-list-card-title {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-primary);
  margin: 0 0 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.series-list-card-count {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin: 0;
}
.series-list-card-sale {
  color: var(--color-sale);
  font-weight: 500;
}

/* ------------------------------------------------------------
   フッター
   ------------------------------------------------------------ */
.footer-link:hover { color: var(--color-primary) !important; }