/* ==========================================================================
   『世界は時間でできている』セクション用スタイル
   既存のテーマ変数（Bootstrap/Quarto）に寄せてあるので、
   サイト全体のテーマ色があれば --bs-* をそのまま継承します。
   ========================================================================== */

/* --- 書籍ヘッダー ------------------------------------------------------- */

.book-hero {
  display: flex;
  gap: 1.75rem;
  align-items: flex-start;
  flex-wrap: wrap;
  margin-block: 1.5rem 2.5rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--bs-border-color, #e3e3e3);
}

.book-hero-cover {
  flex: 0 0 auto;
}

.book-hero-meta {
  flex: 1 1 16rem;
}

.book-hero-meta p {
  margin-block: 0.5rem;
}

.book-hero-cover p {
  margin: 0;
}

.book-hero .book-cover,
.book-hero img {
  max-width: 190px;
  height: auto;
  border-radius: 3px;
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.16);
}

@media (max-width: 575px) {
  .book-hero {
    gap: 1rem;
  }
  .book-hero .book-cover,
  .book-hero img {
    max-width: 130px;
  }
}

/* --- 考察記事エントリ --------------------------------------------------- */

.kosatsu {
  margin-block: 1.75rem;
  padding: 1.1rem 1.35rem;
  border-left: 3px solid var(--bs-secondary-bg, #d8d8d8);
  background: var(--bs-tertiary-bg, #fafafa);
  border-radius: 0 4px 4px 0;
}

/* 執筆者名（見出しではなく強調テキスト。TOCを分野だけに保つため） */
.kosatsu > p:first-child {
  margin-top: 0;
  margin-bottom: 0.6rem;
}

.kosatsu > p:first-child strong {
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

/* 肩書き */
.entry-affil {
  font-size: 0.85rem;
  color: var(--bs-secondary-color, #6b6b6b);
}

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

/* --- X（Twitter）投稿の静的引用カード ----------------------------------- */

.xpost {
  margin-block: 1.25rem;
  padding: 1rem 1.25rem 0.85rem;
  border: 1px solid var(--bs-border-color, #e0e0e0);
  border-radius: 10px;
  background: var(--bs-body-bg, #fff);
}

.xpost > p:first-child {
  margin-bottom: 0.55rem;
  font-size: 0.95rem;
}

.xpost > p:first-child a {
  font-weight: 400;
  color: var(--bs-secondary-color, #6b6b6b);
  text-decoration: none;
}

.xpost > p:first-child a:hover {
  text-decoration: underline;
}

.xpost blockquote {
  margin: 0 0 0.55rem;
  padding: 0;
  border: none;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--bs-body-color, #1f1f1f);
}

.xpost blockquote p:last-child {
  margin-bottom: 0;
}

/* 日付＝元ポストへのリンク */
.xpost > p:last-child {
  margin-bottom: 0;
  font-size: 0.8rem;
}

.xpost > p:last-child a {
  color: var(--bs-secondary-color, #7a7a7a);
  text-decoration: none;
}

.xpost > p:last-child a:hover {
  text-decoration: underline;
}

/* --- 正誤表 ------------------------------------------------------------- */

#errata table {
  font-size: 0.88rem;
}

#errata table td:first-child,
#errata table th:first-child {
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* --- 引用ブロック（書評ページ） ----------------------------------------- */

blockquote {
  border-left: 3px solid var(--bs-secondary-bg, #dcdcdc);
  padding-left: 1.1rem;
  color: var(--bs-body-color, #2a2a2a);
}

/* --- ダークモード対応 --------------------------------------------------- */

@media (prefers-color-scheme: dark) {
  .kosatsu {
    background: rgba(255, 255, 255, 0.035);
  }
  .xpost {
    background: transparent;
  }
}

/* --- ホームのお知らせ欄 --------------------------------------------------- */

.news-list ul,
ul.news-list {
  list-style: none;
  padding-left: 0;
}

.news-list li {
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--bs-border-color, #ececec);
  line-height: 1.75;
}

.news-list li:last-child {
  border-bottom: none;
}

.news-list li strong {
  display: inline-block;
  min-width: 8.5em;
  margin-right: 0.5rem;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--bs-secondary-color, #6b6b6b);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 575px) {
  .news-list li strong {
    display: block;
    margin-bottom: 0.15rem;
  }
}

/* --- 年表（活動記録） ----------------------------------------------------- */

#quarto-document-content table td:first-child {
  white-space: nowrap;
}

/* --- 研究ノート：DOIバッジ（恒久版）------------------------------------- */

.doi-badge {
  margin-block: 0 2rem;
  padding: 0.9rem 1.15rem;
  border: 1px solid var(--bs-border-color, #e0e0e0);
  border-left: 3px solid var(--bs-primary, #2a5d8f);
  border-radius: 0 6px 6px 0;
  background: var(--bs-tertiary-bg, #fafafa);
  font-size: 0.88rem;
}

.doi-badge-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.doi-badge-label {
  padding: 0.1rem 0.5rem;
  border-radius: 3px;
  background: var(--bs-primary, #2a5d8f);
  color: #fff;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.doi-badge-link {
  font-family: var(--bs-font-monospace, ui-monospace, monospace);
  font-size: 0.82rem;
  word-break: break-all;
}

.doi-badge-note {
  margin: 0.5rem 0 0;
  color: var(--bs-secondary-color, #6b6b6b);
  line-height: 1.7;
}

.doi-badge-cite {
  margin-top: 0.55rem;
}

.doi-badge-cite summary {
  cursor: pointer;
  color: var(--bs-secondary-color, #6b6b6b);
  font-size: 0.82rem;
}

.doi-citation {
  margin: 0.5rem 0 0;
  padding: 0.6rem 0.75rem;
  border-radius: 4px;
  background: var(--bs-body-bg, #fff);
  border: 1px solid var(--bs-border-color, #e8e8e8);
  font-size: 0.82rem;
  line-height: 1.8;
  word-break: break-word;
  user-select: all;
}

/* --- 研究ノート：初出表示 ------------------------------------------------- */

.first-published {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--bs-border-color, #ececec);
  font-size: 0.82rem;
  color: var(--bs-secondary-color, #6b6b6b);
}

@media (prefers-color-scheme: dark) {
  .doi-badge {
    background: rgba(255, 255, 255, 0.035);
  }
  .doi-citation {
    background: rgba(255, 255, 255, 0.05);
  }
}