/* ============================
   タイアップ汎用スタイル（タイプB用）
   全タイアップ記事テンプレート共通

   使用方法:
   - 全てのタイアップテンプレート（タイプB）で読み込む
   - クライアント固有の調整は各案件のcustom.cssで上書き
   ============================ */

/* コンテナレイアウト */
.tu-container .main-inner {
  display: block !important;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 90%;
}

.tu-pr-line{
  text-align: right;
}

.tu-container .main-content {
  width: 100% !important;
  max-width: 100%;
  padding-right: 0 !important;
}

.article-hero, .article-section > .section-image, .gallery-item__image{
  width: 100%;
  height: auto!important;
  overflow: hidden;
  margin-bottom: 20px;
  border-radius: 0 !important;
}

/* ============================
   前後の記事ナビゲーション
   ============================ */
.tu-article-navigation {
  display: flex;
  justify-content: space-between;
  gap: 15px;
  margin: 40px 0;
  padding: 20px 0;
  border-top: 1px solid #e0e0e0;
  border-bottom: 1px solid #e0e0e0;
}

.tu-article-navigation .post-nav-item {
  flex: 0 1 48%;
  max-width: 48%;
}

.tu-article-navigation .post-nav-item.prev-post {
  margin-right: auto;
}

.tu-article-navigation .post-nav-item.next-post {
  margin-left: auto;
}

.tu-article-navigation .post-nav-link {
  display: block;
  width: 100%;
  transition: all 0.2s ease;
}

.tu-article-navigation .post-nav-link:hover {
  opacity: 0.7;
}

.tu-article-navigation .post-nav-label {
  font-size: 1.2rem;
  font-weight: var(--font-bold-weight);
  margin-bottom: 10px;
  display: block;
}

.tu-article-navigation .post-nav-content {
  display: flex;
  flex-flow: row nowrap;
  justify-content: flex-start;
  gap: 15px;
  width: 100%;
}

.tu-article-navigation .post-nav-thumb {
  flex: 0 0 100px;
  width: 100px;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-6);
  border: 1px solid var(--color-light);
}

.tu-article-navigation .post-nav-title {
  flex: 1;
  font-size: 1.3rem;
  font-weight: var(--font-sub-weight);
  line-height: 1.6;
  color: var(--color-text);
  margin: 0;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  overflow: hidden;
}

/* ============================
   記事一覧へのリンク
   ============================ */
.tu-index-link-wrapper {
  margin: 40px auto;
  text-align: center;
}

.tu-index-link-wrapper .mag-btn {
  margin: 0 auto;
}

/* ============================
   レスポンシブ: モバイル
   ============================ */
@media screen and (max-width: 767px) {
  .tu-article-navigation {
    flex-direction: column;
    gap: 20px;
  }

  .tu-article-navigation .post-nav-item {
    max-width: 100%;
  }

  .tu-article-navigation .post-nav-thumb {
    flex: 0 0 80px;
    width: 80px;
  }

  .tu-article-navigation .post-nav-title {
    font-size: 1.2rem;
    -webkit-line-clamp: 2;
    line-clamp: 2;
  }
}

/* ============================
   レスポンシブ: タブレット・PC
   ============================ */
@media screen and (min-width: 768px) {
  .tu-article-navigation {
    gap: 30px;
  }

  .tu-article-navigation .post-nav-thumb {
    flex: 0 0 120px;
    width: 120px;
  }

  .tu-article-navigation .post-nav-title {
    font-size: 1.4rem;
  }
}