/* ============================================================
   あまた音楽堂 コラム(記事)ページ専用 (amata_article.css)
   読み込み: Article/index.twig / Article/detail.twig の
   {% block stylesheet %} からのみ。共通CSSには入れない。
   ------------------------------------------------------------
   ■ キャッシュバスターは手動採番(?v=N)を廃止し、mtime自動付与に移行済み
     (A-1 / 概要ファイル 3-19)。Twig側は |amata_v フィルタが付与する。
     このファイルに版数を書かないこと。FTPで上げ直せばURLが変わる。
   ■ ブレークポイントは 991px / 575px の2段のみ(ルールブック準拠)。
   ■ 色・余白・動きは :root のデザイントークンを参照し、値を直書きしない。
   ============================================================ */

.amata-article {
  max-width: var(--amata-container);
  margin-inline: auto;
  padding-inline: 20px;
}

/* ------------------------------------------------------------
   1. 絞り込み(タグチップ)
   ------------------------------------------------------------ */
.amata-article-filter {
  margin-bottom: 40px;
}
.amata-article-filter__group + .amata-article-filter__group {
  margin-top: 16px;
}
.amata-article-filter__ttl {
  margin: 0 0 8px;
  color: var(--amata-ink-soft);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}
.amata-article-filter__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.amata-article-filter__tag {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--amata-line);
  border-radius: var(--amata-radius-pill);
  background: #fff;
  color: var(--amata-ink-soft);
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  transition: color var(--amata-dur-fast) var(--amata-ease-out),
              border-color var(--amata-dur-fast) var(--amata-ease-out);
}
.amata-article-filter__tag:hover,
.amata-article-filter__tag:focus-visible {
  border-color: var(--amata-teal);
  color: var(--amata-teal);
}
.amata-article-filter__tag.is-active {
  border-color: var(--amata-teal);
  background: var(--amata-teal);
  color: #fff;
}
.amata-article-filter__clear {
  margin: 16px 0 0;
}
.amata-article-filter__clear a {
  color: var(--amata-teal);
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
}
.amata-article-filter__clear a:hover,
.amata-article-filter__clear a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ------------------------------------------------------------
   2. 一覧カード(PC3列 → 991px:2列 → 575px:1列)
   ------------------------------------------------------------ */
.amata-article-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px 24px;
  margin: 0 0 48px;
  padding: 0;
  list-style: none;
}
.amata-article-card__link {
  display: block;
  color: inherit;
  text-decoration: none;
}
.amata-article-card__thumb {
  display: block;
  overflow: hidden;
  border-radius: var(--amata-radius);
  box-shadow: var(--amata-shadow-1);
  /* 画像の有無でカード高が変わらないよう比率を固定する */
  aspect-ratio: 1200 / 630;
}
.amata-article-card__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--amata-dur) var(--amata-ease-out);
}
/* 画像未登録時のプレースホルダ(ブランドグラデーション + 白抜きロゴ)。
   ロゴは装飾のため CSS 背景で置く(スクリーンリーダーには読ませない)。
   実体: html/user_data/assets/img/common/logo_white.png */
.amata-article-card__thumb--empty {
  display: block;
  width: 100%;
  height: 100%;
  background-image: url('../img/common/logo_white.png'), var(--amata-grad);
  background-repeat: no-repeat;
  background-position: center;
  background-size: 52% auto, cover;
}
.amata-article-card__link:hover .amata-article-card__thumb img,
.amata-article-card__link:focus-visible .amata-article-card__thumb img {
  transform: scale(1.04);
}
.amata-article-card__body {
  display: block;
  padding-top: 14px;
}
.amata-article-card__date {
  display: block;
  color: var(--amata-ink-soft);
  font-size: 0.8rem;
  font-weight: 700;
  font-feature-settings: 'tnum';
}
.amata-article-card__ttl {
  display: block;
  margin-top: 6px;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.6;
  transition: color var(--amata-dur-fast) var(--amata-ease-out);
}
.amata-article-card__link:hover .amata-article-card__ttl,
.amata-article-card__link:focus-visible .amata-article-card__ttl {
  color: var(--amata-teal);
}
.amata-article-card__lead {
  display: block;
  margin-top: 8px;
  color: var(--amata-ink-soft);
  font-size: 0.9rem;
  line-height: 1.8;
}
.amata-article-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}
.amata-article-card__tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--amata-radius-pill);
  background: var(--amata-bg-tint-2);
  color: var(--amata-ink-soft);
  font-size: 0.75rem;
  font-weight: 700;
}

.amata-article__empty {
  padding: 60px 0;
  color: var(--amata-ink-soft);
  text-align: center;
}

/* ------------------------------------------------------------
   3. 詳細
   ------------------------------------------------------------ */
.amata-article--detail {
  max-width: 800px;
}
.amata-article__crumb {
  margin-bottom: 24px;
  color: var(--amata-ink-soft);
  font-size: 0.8rem;
}
.amata-article__crumb a {
  color: var(--amata-ink-soft);
  text-decoration: none;
}
.amata-article__crumb a:hover,
.amata-article__crumb a:focus-visible {
  color: var(--amata-teal);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.amata-article__crumb span {
  margin-inline: 8px;
}

.amata-article__head {
  margin-bottom: 32px;
}
.amata-article__date {
  display: block;
  color: var(--amata-ink-soft);
  font-size: 0.85rem;
  font-weight: 700;
  font-feature-settings: 'tnum';
}
.amata-article__ttl {
  margin: 10px 0 0;
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1.5;
}
.amata-article__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}
.amata-article__tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--amata-radius-pill);
  background: var(--amata-bg-tint-2);
  color: var(--amata-ink-soft);
  font-size: 0.8rem;
  font-weight: 700;
  text-decoration: none;
  transition: color var(--amata-dur-fast) var(--amata-ease-out);
}
.amata-article__tag:hover,
.amata-article__tag:focus-visible {
  color: var(--amata-teal);
}

.amata-article__eyecatch {
  margin: 0 0 32px;
}
.amata-article__eyecatch img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--amata-radius);
  box-shadow: var(--amata-shadow-1);
}

.amata-article__lead {
  margin: 0 0 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--amata-line);
  color: var(--amata-ink-soft);
  font-size: 1rem;
  line-height: 2;
}

.amata-article__body {
  line-height: 2;
}
.amata-article__body h2 {
  margin: 48px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--amata-teal);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.5;
}
.amata-article__body h3 {
  margin: 32px 0 12px;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.6;
}
.amata-article__body p {
  margin: 0 0 1.5em;
}
.amata-article__body a {
  color: var(--amata-teal);
}
.amata-article__body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--amata-radius);
}
.amata-article__body ul,
.amata-article__body ol {
  margin: 0 0 1.5em;
  padding-left: 1.5em;
}

/* ------------------------------------------------------------
   4. 関連商品
   ------------------------------------------------------------ */
.amata-article__works {
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--amata-line);
}
.amata-article__works-ttl {
  margin: 0 0 24px;
  font-size: 1.15rem;
  font-weight: 700;
  text-align: center;
}
.amata-article__works .amata-work-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.amata-article__works .amata-work-card__link {
  display: block;
  color: inherit;
  text-decoration: none;
}
.amata-article__works .amata-work-card__thumb {
  display: block;
  overflow: hidden;
  border-radius: var(--amata-radius);
  aspect-ratio: 1 / 1;
}
.amata-article__works .amata-work-card__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--amata-dur) var(--amata-ease-out);
}
.amata-article__works .amata-work-card__link:hover .amata-work-card__thumb img,
.amata-article__works .amata-work-card__link:focus-visible .amata-work-card__thumb img {
  transform: scale(1.04);
}
.amata-article__works .amata-work-card__body {
  display: block;
  padding-top: 10px;
}
.amata-article__works .amata-work-card__name {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.6;
}
.amata-article__works .amata-work-card__price {
  display: block;
  margin-top: 4px;
  color: var(--amata-ink-soft);
  font-size: 0.85rem;
  font-weight: 700;
}
.amata-article__works .amata-work-card__tax {
  font-size: 0.7rem;
  font-weight: 400;
}

.amata-article__back {
  margin-top: 56px;
  text-align: center;
}
.amata-article__back a {
  color: var(--amata-teal);
  font-weight: 700;
  text-decoration: none;
}
.amata-article__back a:hover,
.amata-article__back a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ------------------------------------------------------------
   4.5 この記事を掲載している特集（相互リンクの表示側 / Step 3-2）
   紐付けの編集は特集の管理画面からのみ行う。ここは表示専用。
   画像はバナー（600×250）優先。未登録ならアイキャッチが入るが、
   object-fit: cover で同じ比率に揃えるためカード高は変わらない。
   ------------------------------------------------------------ */
.amata-article__features {
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--amata-line);
}
.amata-article__features-ttl {
  margin: 0 0 24px;
  font-size: 1.15rem;
  font-weight: 700;
  text-align: center;
}
.amata-article-feature-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.amata-article-feature-card__link {
  display: block;
  color: inherit;
  text-decoration: none;
}
.amata-article-feature-card__thumb {
  display: block;
  overflow: hidden;
  border-radius: var(--amata-radius);
  box-shadow: var(--amata-shadow-1);
  aspect-ratio: 600 / 250;
}
.amata-article-feature-card__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--amata-dur) var(--amata-ease-out);
}
/* 画像未登録時のプレースホルダ。装飾のためスクリーンリーダーには読ませない。
   実体: html/user_data/assets/img/common/logo_white.png */
.amata-article-feature-card__thumb--empty {
  display: block;
  width: 100%;
  height: 100%;
  background-image: url('../img/common/logo_white.png'), var(--amata-grad);
  background-repeat: no-repeat;
  background-position: center;
  background-size: 44% auto, cover;
}
.amata-article-feature-card__link:hover .amata-article-feature-card__thumb img,
.amata-article-feature-card__link:focus-visible .amata-article-feature-card__thumb img {
  transform: scale(1.04);
}
.amata-article-feature-card__ttl {
  display: block;
  margin-top: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.6;
  transition: color var(--amata-dur-fast) var(--amata-ease-out);
}
.amata-article-feature-card__link:hover .amata-article-feature-card__ttl,
.amata-article-feature-card__link:focus-visible .amata-article-feature-card__ttl {
  color: var(--amata-teal);
}

/* ------------------------------------------------------------
   5. レスポンシブ
   ------------------------------------------------------------ */
@media (max-width: 991px) {
  .amata-article {
    padding-inline: 16px;
  }
  .amata-article-cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 16px;
  }
  .amata-article__ttl {
    font-size: 1.35rem;
  }
  .amata-article__body h2 {
    margin-top: 40px;
    font-size: 1.15rem;
  }
}

@media (max-width: 575px) {
  .amata-article-cards {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .amata-article__works .amata-work-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .amata-article-feature-cards {
    grid-template-columns: 1fr;
  }
}

/* ------------------------------------------------------------
   6. モーション低減設定への配慮
   ------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  .amata-article-card__thumb img,
  .amata-article__works .amata-work-card__thumb img,
  .amata-article-feature-card__thumb img,
  .amata-article-filter__tag,
  .amata-article-card__ttl,
  .amata-article-feature-card__ttl {
    transition: none;
  }
  .amata-article-card__link:hover .amata-article-card__thumb img,
  .amata-article__works .amata-work-card__link:hover .amata-work-card__thumb img,
  .amata-article-feature-card__link:hover .amata-article-feature-card__thumb img {
    transform: none;
  }
}