@charset "UTF-8";
/* ==========================================================================
   math-abstraction.php 専用スタイル
   - style.css の後に読み込むこと
   - 全クラスに ma- 接頭辞（既存クラスとの衝突回避）
   - 他ページで再利用する場合は接頭辞を共通名に変更し style.css へ統合する
   ========================================================================== */

/* --- 基本レイアウト ------------------------------------------------------ */
.ma-main {
  max-width: 820px;
  margin: 0 auto;
  padding: 20px 15px 60px;
}
.ma-h1 {
  text-align: left;
  margin-bottom: 20px;
  line-height: 1.5;
}
.ma-h2.section-title {
  text-align: left;
  font-size: 20px;
  border-left: 4px solid #0056b3;
  padding-left: 12px;
  margin-bottom: 20px;
}
.ma-h3 {
  font-size: 17px;
  color: #062852;
  font-weight: 700;
  margin: 30px 0 12px;
}
.ma-section { margin-bottom: 50px; }
.ma-section--last { margin-bottom: 40px; }
.ma-body {
  font-size: 15px;
  line-height: 1.85;
  color: #222;
}
.ma-divider { margin: 40px 0; }
.ma-hr-soft {
  border: none;
  border-top: 1px solid #e1ebf5;
  margin: 30px 0 25px;
}

/* --- リード文 ------------------------------------------------------------ */
.ma-lead {
  font-size: 15px;
  line-height: 1.85;
  color: #222;
  margin-bottom: 35px;
}
.ma-lead-catch {
  font-size: 17px;
  font-weight: 700;
  color: #062852;
  margin-bottom: 15px;
}

/* --- おすすめ読者ボックス ------------------------------------------------ */
.ma-target-box { margin-bottom: 30px; }
.ma-target-title {
  font-size: 15px;
  color: #062852;
  font-weight: 700;
  margin: 0 0 12px;
  border-bottom: 1px solid #cce0ff;
  padding-bottom: 8px;
}
.ma-target-list {
  margin: 0;
  padding-left: 0;
  list-style: none;
}
.ma-target-list li {
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 8px;
}
.ma-target-list li:last-child { margin-bottom: 0; }

/* --- 目次 ---------------------------------------------------------------- */
.ma-toc {
  background: #fafbfd;
  padding: 22px 25px;
  margin-bottom: 45px;
  border-radius: 8px;
}
.ma-toc-title {
  font-size: 16px;
  font-weight: 700;
  color: #062852;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.ma-toc-bar {
  display: inline-block;
  width: 4px;
  height: 18px;
  background: #0056b3;
  border-radius: 2px;
}
.ma-toc-list {
  margin: 0;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.8;
  color: #333;
}
.ma-toc-list > li { margin-bottom: 6px; }
.ma-toc-list > li:last-child { margin-bottom: 0; }
.ma-toc-list a {
  color: #0056b3;
  text-decoration: underline;
}
.ma-toc-sub {
  list-style: disc;
  margin: 4px 0 6px 18px;
  padding-left: 0;
  font-size: 13.5px;
}

/* --- 補足リストボックス（薄枠） ------------------------------------------ */
.ma-note {
  background: #fdfefe;
  border: 1px solid #e1e9f2;
  padding: 16px 20px;
  margin: 18px 0;
  border-radius: 6px;
}
.ma-note-list {
  margin: 0;
  padding-left: 18px;
  line-height: 1.75;
  font-size: 14.5px;
}

/* --- 本文内リンク（コラム誘導） ------------------------------------------ */
.ma-relink {
  font-size: 14px;
  margin-top: 12px;
}
.ma-relink a {
  color: #0056b3;
  text-decoration: underline;
  font-weight: 500;
}

/* --- 図解カード共通 ------------------------------------------------------ */
.ma-fig {
  background: #fbfdff;
  border: 1px solid #d4e5f7;
  padding: 20px;
  border-radius: 8px;
  margin: 20px 0;
}
.ma-fig--lead { margin: 0 0 25px; }
.ma-fig--cat {
  background: #f8fbfe;
  border-color: #cde0f5;
  margin: 25px 0;
}
.ma-fig--mol { border-color: #d8e6f5; }
.ma-fig--subj {
  background: #fafbfd;
  border-color: #dbe6f3;
}
.ma-fig-title {
  font-size: 13px;
  font-weight: 700;
  color: #062852;
  text-align: center;
  margin-bottom: 14px;
  letter-spacing: 0.05em;
}
.ma-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 12px;
}
.ma-grid--wide {
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

/* --- 図解1：計算する力 → 方針を選ぶ力 ----------------------------------- */
.ma-fig-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.ma-fig-card {
  background: #ffffff;
  border: 1px solid #c9daf0;
  border-radius: 6px;
  padding: 14px 18px;
  flex: 1 1 200px;
  text-align: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}
.ma-fig-card.is-accent {
  background: #eef6ff;
  border: 1.5px solid #0056b3;
  box-shadow: 0 1px 4px rgba(0, 86, 179, 0.08);
}
.ma-fig-label {
  font-size: 12px;
  color: #666;
  display: block;
  margin-bottom: 4px;
}
.ma-fig-card.is-accent .ma-fig-label {
  color: #0056b3;
  font-weight: 700;
}
.ma-fig-main {
  font-size: 15px;
  color: #1a3a6b;
}
.ma-fig-card.is-accent .ma-fig-main { color: #062852; }
.ma-fig-note {
  font-size: 12px;
  color: #555;
  display: block;
  margin-top: 4px;
}
.ma-fig-card.is-accent .ma-fig-note { color: #333; }
.ma-arrow {
  font-size: 22px;
  color: #0056b3;
  font-weight: 700;
  padding: 0 5px;
  line-height: 1;
}

/* --- 図解2：つまずきの4分類 ---------------------------------------------- */
.ma-cat-card {
  background: #ffffff;
  border: 1px solid #d0e1f3;
  border-radius: 6px;
  padding: 12px;
  text-align: center;
}
.ma-cat-card.is-accent {
  background: #eef6ff;
  border: 1.5px solid #0056b3;
}
.ma-cat-num {
  font-size: 11px;
  font-weight: 700;
  color: #0056b3;
  margin-bottom: 4px;
}
.ma-cat-name {
  font-size: 14px;
  font-weight: 700;
  color: #062852;
  margin-bottom: 6px;
}
.ma-cat-desc {
  font-size: 12px;
  color: #555;
  line-height: 1.5;
}
.ma-cat-card.is-accent .ma-cat-desc { color: #333; }

/* --- 図解3：molの相互換算 ------------------------------------------------ */
.ma-mol {
  max-width: 480px;
  margin: 0 auto;
}
.ma-mol-center {
  background: #eef6ff;
  border: 1.5px solid #0056b3;
  border-radius: 6px;
  padding: 12px;
  text-align: center;
  margin-bottom: 12px;
}
.ma-mol-center strong {
  font-size: 16px;
  color: #062852;
}
.ma-mol-center-note {
  font-size: 12px;
  color: #0056b3;
  margin-top: 2px;
}
.ma-mol-arrows {
  display: flex;
  justify-content: space-around;
  text-align: center;
  font-size: 18px;
  color: #0056b3;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1;
}
.ma-mol-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
}
.ma-mol-item {
  background: #ffffff;
  border: 1px solid #c9daf0;
  border-radius: 6px;
  padding: 10px 6px;
  text-align: center;
}
.ma-mol-label {
  font-size: 11px;
  color: #666;
  display: block;
}
.ma-mol-name {
  font-size: 13px;
  color: #1a3a6b;
}

/* --- 図解4：3科目 -------------------------------------------------------- */
.ma-subj-card {
  background: #ffffff;
  border: 1px solid #c9daf0;
  border-radius: 6px;
  padding: 15px;
}
.ma-subj-name {
  font-size: 15px;
  font-weight: 700;
  color: #0056b3;
  margin-bottom: 6px;
  border-bottom: 1px solid #e1e9f2;
  padding-bottom: 4px;
}
.ma-subj-desc {
  font-size: 13px;
  color: #333;
  margin: 0;
  line-height: 1.6;
}

/* --- 学年・状況別：フロー図 ---------------------------------------------- */
.ma-sec5-lead { margin-bottom: 20px; }
.ma-flow {
  background: #ffffff;
  border: 1px solid #d4e5f7;
  padding: 20px;
  margin: 0 0 35px;
  border-radius: 8px;
}
.ma-flow-link {
  text-decoration: none;
  color: inherit;
  display: block;
  height: 100%;
}
.ma-flow-card {
  background: #fafcff;
  border: 1.5px solid #d0e3f7;
  border-radius: 6px;
  padding: 14px;
  height: 100%;
  box-sizing: border-box;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.ma-flow-link:hover .ma-flow-card,
.ma-flow-link:focus-visible .ma-flow-card {
  border-color: #0056b3;
  box-shadow: 0 2px 8px rgba(0, 86, 179, 0.12);
}
.ma-flow-card strong {
  font-size: 14.5px;
  color: #062852;
  display: block;
  margin-bottom: 6px;
}
.ma-flow-card span {
  font-size: 12px;
  color: #555;
  line-height: 1.5;
  display: block;
}

/* --- 学年・状況別：分岐ブロック ------------------------------------------ */
.ma-branch {
  border-radius: 8px;
  padding: 22px 20px;
  margin-bottom: 25px;
}
.ma-branch--1 {
  background: #fafcff;
  border: 1px solid #e5effa;
}
.ma-branch--2 {
  background: #f2f7fc;
  border: 1.5px solid #d0e2f5;
}
.ma-branch--3 {
  background: #edf4fa;
  border: 1px solid #cadff2;
  margin-bottom: 15px;
}
.ma-branch-title {
  font-size: 16.5px;
  color: #062852;
  font-weight: 700;
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.ma-badge {
  background: #1a3a6b;
  color: #ffffff;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 14px;
  display: inline-block;
  white-space: nowrap;
}
.ma-branch > p { margin-bottom: 12px; }
.ma-branch-list {
  margin: 12px 0 16px;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.8;
}
.ma-branch-list li { margin-bottom: 10px; }
.ma-branch-list li:last-child { margin-bottom: 0; }
.ma-conclusion {
  background: #ffffff;
  border-left: 3.5px solid #0056b3;
  border-radius: 0 6px 6px 0;
  padding: 12px 16px;
  margin-top: 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}
.ma-conclusion p {
  margin: 0;
  font-weight: 700;
  color: #062852;
  font-size: 14px;
  line-height: 1.65;
}

/* --- CTA ----------------------------------------------------------------- */
.ma-cta-wrap { margin: 35px 0 25px; }
.ma-cta-btn {
  display: inline-block;
  background: #ffffff;
  color: #062852;
  border: 1.5px solid #062852;
  border-radius: 50px;
  padding: 10px 32px;
  font-size: 14.5px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}
.ma-cta-btn:hover,
.ma-cta-btn:focus-visible {
  background: #062852;
  color: #ffffff;
  box-shadow: 0 3px 10px rgba(6, 40, 82, 0.18);
}

/* --- 資料室リンク -------------------------------------------------------- */
.ma-doc-note {
  font-size: 14px;
  color: #555;
  line-height: 1.7;
  background: #fbfcfd;
  border-left: 3px solid #b8d2eb;
  padding: 12px 16px;
  margin: 25px 0;
}
.ma-doc-note a {
  color: #0056b3;
  text-decoration: underline;
  font-weight: 500;
}

/* --- 下部回遊ナビ -------------------------------------------------------- */
.ma-related {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid #d2dfed;
}

/* --- レスポンシブ調整（インラインstyleでは書けなかった部分） -------------- */
@media screen and (max-width: 600px) {
  .ma-main { padding: 16px 14px 50px; }
  .ma-h2.section-title { font-size: 18.5px; }
  .ma-h3 { font-size: 16px; }
  .ma-toc { padding: 18px 18px; }

  .ma-fig { padding: 16px 14px; }
  .ma-fig-card { flex: 1 1 100%; }
  /* 横矢印を縦向きに */
  .ma-arrow {
    transform: rotate(90deg);
    padding: 2px 0;
  }

  .ma-mol-grid { gap: 6px; }
  .ma-mol-item { padding: 8px 4px; }
  .ma-mol-label { font-size: 10px; }
  .ma-mol-name { font-size: 12px; }

  .ma-branch { padding: 18px 15px; }
  .ma-branch-list { padding-left: 18px; font-size: 14px; }
  .ma-cta-btn {
    display: block;
    padding: 12px 18px;
  }
}