/* =====================================================
   SINGLE NEWS（お知らせ詳細ページ）
===================================================== */

.single-news {
  background: #fff;
  padding: 80px 0;
}

/* コンテンツ内の最大幅 */
.single-news .container {
  max-width: 760px;
}

/* タイトル（h1） */
.single-news .news-title {
  font-size: 2.2rem;      /* PC：ベースh1と同じ */
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-primary);
}

/* 日付 */
.single-news .news-date {
  font-size: 0.95rem;
  color: var(--color-secondary);
  margin-bottom: 30px;
}

/* アイキャッチ */
.single-news .news-thumb {
  margin-bottom: 32px;
}
.single-news .news-thumb img {
  width: 100%;
  border-radius: 8px;
  object-fit: cover;
}

/* 本文 */
.single-news .news-content {
  line-height: 1.9;
  font-size: 1.05rem;
  color: var(--color-text);
}

.single-news .news-content p {
  margin-bottom: 1.6em;
}

.single-news .news-content img {
  margin: 28px 0;
  border-radius: 8px;
}

/* 前後ナビ */
.single-news .news-navigation {
  display: flex;
  justify-content: space-between;
  margin: 50px 0 40px;
}

.single-news .news-navigation a {
  color: var(--color-primary);
  font-size: 0.95rem;
}

.single-news .news-navigation a:hover {
  opacity: 0.7;
}

/* 一覧へ戻るボタン */
.single-news .news-back {
  text-align: center;
  margin-top: 40px;
}

.single-news .back-button {
  display: inline-block;
  padding: 12px 26px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 700;
  transition: opacity 0.3s;
}

.single-news .back-button:hover {
  opacity: 0.75;
}

/* =====================================================
   SP（スマホ）
===================================================== */
@media (max-width: 768px) {

  .single-news {
    padding: 50px 0;
  }

  .single-news .container {
    padding: 0 16px;
  }

  .single-news .news-title {
    font-size: 1.6rem;    /* SPのh1調整に合わせる */
    margin-bottom: 8px;
  }

  .single-news .news-date {
    margin-bottom: 24px;
  }

  .single-news .news-content {
    font-size: 1rem;
    line-height: 1.8;
  }

  .single-news .news-navigation {
    flex-direction: column;
    gap: 14px;
    text-align: center;
  }

  .single-news .back-button {
    padding: 12px 22px;
    font-size: 0.9rem;
  }
}


@media (max-width: 768px) {
  .single-news .news-title {
    font-size: 1.3rem;   /* ← 21px程度に縮小 */
    line-height: 1.35;
    margin-bottom: 6px;
  }
}

/* =====================================================
   HEADER：SP 調整（ナビが内側に入る問題の修正）
===================================================== */
@media (max-width: 768px) {

  .site-header {
    padding: 0; /* 余白リセット */
  }

  .header-inner {
    padding: 10px 16px;   /* 上下を圧縮：14px → 10px */
    align-items: center;  /* 中央揃え強制 */
  }

  /* ロゴが下がる場合は高さを確定させる */
  .header-logo-img {
    height: 26px;   /* SPロゴの最適値 */
    display: block;
  }

  /* ナビが上に上がらないよう行揃えを調整 */
  .header-nav ul {
    align-items: center;
  }
}