.simpletoc-list {
  border: 2px solid #ccc;
  padding: 1em;
  border-radius: 10px;
  background-color: #fdfdfd;
}
/* 目次のカスタマイズ
.simpletoc-list li {
  margin: 0.3em 0;
}

.simpletoc-list a {
  color: #004466;
  text-decoration: none;
}

.simpletoc-list a:hover {
  text-decoration: underline;
} */

 /* 🎩 英国図書館風 SimpleTOC */
.simpletoc-list {
  background-color: #fdfaf5; /* 生成り・古書風の紙色 */
  border: 1px solid #b59b76; /* ブラウン系、真鍮イメージ */
  border-left: 4px solid #6a4e3b; /* アクセントに背表紙風の帯 */
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(90, 70, 50, 0.1);
  padding: 1.5em;
  margin: 2em 0;
  font-family: 'Georgia', serif;
}

.simpletoc-list:hover {
  box-shadow: 0 4px 12px rgba(90, 70, 50, 0.15);
}

.simpletoc-list li {
  list-style: none;
  margin: 0.6em 0;
  font-size: 1.05em;
  position: relative;
  padding-left: 1em;
}

.simpletoc-list li::before {
  content: "▪";
  position: absolute;
  left: 0;
  color: #6a4e3b;
  font-size: 0.9em;
}

.simpletoc-list a {
  text-decoration: none;
  color: #4a3b2b; /* 焦げ茶、旧いインク風 */
  font-weight: bold;
  transition: color 0.3s ease;
}

.simpletoc-list a:hover {
  color: #2e2215; /* より濃い茶で反応 */
  text-decoration: underline;
}
 /* 真鍮風contents */
.toc-brass-badge {
  display: inline-block;
  background: linear-gradient(145deg, #caa978, #a07e50); /* 真鍮風グラデーション */
  color: #fff;
  font-weight: bold;
  letter-spacing: 1px;
  font-size: 0.85em;
  padding: 0.4em 1em;
  border-radius: 6px;
  box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.4),
              0 1px 3px rgba(0, 0, 0, 0.3);
  margin-bottom: 0.5em;
  font-family: 'Georgia', serif;
  border: 1px solid #8a6e45;
  text-align: center;
}