/* ============================================================
   Midori TOC — 目次スタイル
   ============================================================ */

.midori-toc {
  border: 1px solid #d0d0d0;
  border-radius: 6px;
  padding: 20px 28px 16px;
  margin: 2.5em auto 3em;
  background: #f7f7f7;
  width: 80%;
  max-width: 100%;
  box-sizing: border-box;
}

.midori-toc__title {
  text-align: center;
  font-size: 16px;
  font-weight: bold;
  color: #333;
  margin: 0 0 14px;
  padding: 0;
  line-height: 1.4;
}

/* ----------------------------------------------------------
   リスト
   ---------------------------------------------------------- */
.midori-toc__list {
  list-style: disc;
  margin: 0;
  padding: 0 0 0 1.5em;
}

.midori-toc__list li {
  line-height: 1.65;
  margin-bottom: 5px;
  font-size: inherit;
  word-break: break-word;
  overflow-wrap: break-word;
}

.midori-toc__list li:last-child {
  margin-bottom: 0;
}

.midori-toc__list a {
  color: #333;
  text-decoration: none;
}

.midori-toc__list a:hover {
  color: #31a33d;
  text-decoration: underline;
}

/* H3：インデント＋「└」 */
.midori-toc__level-h3 {
  list-style: none;
  padding-left: 1.2em;
  color: #555;
  font-size: 0.875em;
}

.midori-toc__level-h3 > a {
  display: block;
  padding-left: 1.3em;
  text-indent: -1.3em;
}

.midori-toc__level-h3 > a::before {
  content: "└\00a0";
  color: #aaa;
}

/* H4：さらにインデント */
.midori-toc__level-h4 {
  list-style: none;
  padding-left: 2.4em;
  color: #666;
}

.midori-toc__level-h4 > a {
  display: block;
  padding-left: 1.3em;
  text-indent: -1.3em;
}

.midori-toc__level-h4 > a::before {
  content: "└\00a0";
  color: #ccc;
}

/* ----------------------------------------------------------
   折りたたみボタン
   ---------------------------------------------------------- */
.midori-toc__toggle {
  display: block;
  margin: 14px auto 0;
  padding: 6px 28px;
  border: 1px solid #aaa;
  border-radius: 20px;
  background: transparent;
  cursor: pointer;
  font-size: 13px;
  color: #555;
  transition: border-color 0.2s, color 0.2s;
  line-height: 1.5;
}

.midori-toc__toggle:hover {
  border-color: #31a33d;
  color: #31a33d;
  outline: none;
}

.midori-toc__toggle:focus {
  outline: 2px solid #31a33d;
  outline-offset: 2px;
}

/* ----------------------------------------------------------
   スマホ（767px以下）
   ---------------------------------------------------------- */
@media screen and (max-width: 767px) {

  .midori-toc {
    width: 100%;
    padding: 14px 16px 12px;
    margin: 1.8em auto 2em;
    border-radius: 4px;
  }

  .midori-toc__title {
    font-size: 14px;
    margin-bottom: 10px;
  }

  .midori-toc__list {
    padding-left: 1.2em;
  }

  .midori-toc__list li {
    font-size: inherit;
    margin-bottom: 4px;
    line-height: 1.6;
  }

  .midori-toc__level-h3 {
    padding-left: 1em;
  }

  .midori-toc__level-h4 {
    padding-left: 2em;
  }

  .midori-toc__toggle {
    font-size: 12px;
    padding: 5px 20px;
    margin-top: 10px;
  }
}