/* ==============================
   記事一覧共通CSS — page-articles.css
   コラム一覧（/column/）・お知らせ（/news/）で共有
   ※ FV・パンくず・セクション見出しは page-common.css に集約
   ※ ヘッダー・フッター・CTAバンドは style.css に集約
   ============================== */

/* ==============================
   カテゴリフィルタ（コラムのみ使用）
   ============================== */
.articles-filter {
  background: var(--color-bg);
  padding: 32px 20px 0;
}

.articles-filter__inner {
  max-width: 780px;
  margin: 0 auto;
}

.articles-filter__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.articles-filter__btn {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 500;
  color: #666;
  background: none;
  border: 1.5px solid #ddd;
  border-radius: 20px;
  padding: 7px 20px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.articles-filter__btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.articles-filter__btn.is-active {
  color: #fff;
  background: var(--color-primary);
  border-color: var(--color-primary);
}

/* ==============================
   記事一覧
   ============================== */
.articles {
  background: var(--color-bg);
  padding: 40px 20px 80px;
}

.articles__inner {
  max-width: 780px;
  margin: 0 auto;
}

.articles__list {
  list-style: none;
}

.articles__item {
  border-bottom: 1px solid #e8e8e8;
}

.articles__item:first-child {
  border-top: 1px solid #e8e8e8;
}

.articles__link {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 20px 4px;
  text-decoration: none;
  transition: background 0.15s;
}

.articles__link:hover {
  background: #FAFAFA;
}

/* 日付 */
.articles__date {
  flex-shrink: 0;
  font-family: var(--font-english);
  font-size: 14px;
  font-weight: 400;
  color: #999;
  letter-spacing: 0.02em;
}

/* カテゴリバッジ */
.articles__category {
  flex-shrink: 0;
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 500;
  color: #fff;
  border-radius: 3px;
  padding: 2px 10px;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.articles__category--inheritance {
  background: var(--color-primary);
}

.articles__category--realestate {
  background: #5B8DBE;
}

.articles__category--seminar {
  background: var(--color-accent);
}

.articles__category--news {
  background: #777;
}

/* タイトル */
.articles__title {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.6;
  flex: 1;
}

.articles__link:hover .articles__title {
  color: var(--color-primary);
}

/* 著者（コラムのみ） */
.articles__author {
  flex-shrink: 0;
  font-family: var(--font-body);
  font-size: 13px;
  color: #999;
  white-space: nowrap;
}

/* 空状態 */
.articles__empty {
  text-align: center;
  font-family: var(--font-body);
  font-size: 15px;
  color: #999;
  padding: 60px 20px;
  line-height: 1.8;
}

/* ==============================
   アニメーション
   ============================== */

/* --- フィルタ: フェードイン --- */
.articles-filter.fade-in {
  opacity: 0;
}

.articles-filter.fade-in.is-visible {
  animation: articlesFadeIn 1.0s cubic-bezier(0.22, 1, 0.36, 1) 0.4s both;
}

/* --- 記事リスト: stagger フェードアップ --- */
.articles__item.stagger-child {
  opacity: 0;
}

.articles__item.stagger-child.is-visible {
  animation: articlesItemUp 1.0s cubic-bezier(0.22, 1, 0.36, 1) 0.4s both;
}

/* --- Keyframes --- */
@keyframes articlesFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes articlesItemUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* --- 記事詳細: 記事本文は静かにフェードイン（移動なし） --- */
.article-detail.fade-in {
  opacity: 0;
  transform: none;
}

.article-detail.fade-in.is-visible {
  animation: articleDetailFade 1.2s cubic-bezier(0.22, 1, 0.36, 1) 0.4s both;
}

/* --- 記事詳細: インラインCTAは線の伸長→フェードイン --- */
.article-cta.fade-in {
  opacity: 0;
  transform: none;
}

.article-cta.fade-in.is-visible {
  animation: articleCtaReveal 1.0s cubic-bezier(0.22, 1, 0.36, 1) 0.4s both;
}

@keyframes articleDetailFade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes articleCtaReveal {
  0%   { opacity: 0; }
  40%  { opacity: 0.6; }
  100% { opacity: 1; }
}

/* --- アクセシビリティ: モーション軽減 --- */
@media (prefers-reduced-motion: reduce) {
  .articles-filter.fade-in,
  .articles__item.stagger-child,
  .article-detail.fade-in,
  .article-cta.fade-in {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ==============================
   記事詳細
   ============================== */
.article-detail {
  background: var(--color-bg);
  padding: 40px 20px 80px;
}

.article-detail__inner {
  max-width: 780px;
  margin: 0 auto;
}

.article-detail__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.article-detail__date {
  font-family: var(--font-english);
  font-size: 14px;
  color: #999;
  letter-spacing: 0.02em;
}

.article-detail__category {
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 500;
  color: #fff;
  background: #777;
  border-radius: 3px;
  padding: 2px 10px;
  letter-spacing: 0.04em;
}

.article-detail__title {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.6;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid #e8e8e8;
}

.article-detail__body {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-text);
  line-height: 2.0;
}

.article-detail__body p {
  margin-bottom: 1.5em;
}

.article-detail__body ul,
.article-detail__body ol {
  margin-bottom: 1.5em;
  padding-left: 1.5em;
}

.article-detail__body li {
  margin-bottom: 0.5em;
}

.article-detail__body h2 {
  font-size: 20px;
  font-weight: 700;
  margin: 2em 0 1em;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary);
}

.article-detail__body h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 1.5em 0 0.8em;
}

.article-detail__body img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  margin: 1em 0;
}

/* 記事詳細ページの関連事例セクション: 白背景の記事本文とコントラストを付ける */
.article-detail + .practice-cases,
.article-cta + .practice-cases {
  background: #F0F0F0;
}

/* 記事内CTA */
.article-cta {
  padding: 48px 20px;
  text-align: center;
  border-top: 1px solid #e8e8e8;
}

.article-cta__inner {
  max-width: 560px;
  margin: 0 auto;
}

.article-cta__heading {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.article-cta__sub {
  font-family: var(--font-body);
  font-size: 15px;
  color: #666;
  margin-bottom: 24px;
}

.article-cta__sub strong {
  font-size: 18px;
  color: var(--color-text);
}

.article-cta__buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.article-cta__btn {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  padding: 14px 32px;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
}

.article-cta__btn--primary {
  background: var(--color-primary);
  color: #fff;
}

.article-cta__btn--primary:hover {
  background: #25A06C;
}

.article-cta__btn--line {
  color: var(--color-cta-line);
  border: 1.5px solid var(--color-cta-line);
}

.article-cta__btn--line:hover {
  background: var(--color-cta-line);
  color: #fff;
}

.article-detail__back {
  margin-top: 48px;
  text-align: center;
}

/* 関連事例がない場合（戻りボタンが直接の子要素）: 上マージン不要 */
.practice-cases__inner > .article-detail__back:first-child {
  margin-top: 0;
}

.article-detail__back-link {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
  border-radius: 4px;
  padding: 12px 32px;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.article-detail__back-link:hover {
  background: var(--color-primary);
  color: #fff;
}

/* --- 解決事例詳細の追加スタイル --- */
.case-detail__info {
  background: #f8f8f8;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 32px;
  max-width: 480px;
}

.case-detail__info-row {
  display: flex;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid #e8e8e8;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
}

.case-detail__info-row:last-child {
  border-bottom: none;
}

.case-detail__info-label {
  flex-shrink: 0;
  width: 120px;
  font-weight: 700;
  color: var(--color-text);
}

.case-detail__info-value {
  color: #666;
}

/* 依頼者情報インライン表示 */
.case-detail__client-meta {
  font-family: var(--font-body);
  font-size: 14px;
  color: #888;
  margin-bottom: 32px;
}

.case-detail__section {
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid #e8e8e8;
}

.case-detail__section:last-of-type {
  border-bottom: none;
}

/* 概要: 見出しなしリード文 */
.case-detail__lead {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 2.1;
  color: var(--color-text);
  margin-bottom: 40px;
}



.case-detail__section-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--color-primary);
}

.case-detail__section-body {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-text);
  line-height: 2.0;
}

.case-detail__comment {
  background: #f0f6fa;
  border-radius: 8px;
  padding: 24px;
  margin-top: 32px;
}

.case-detail__comment-title {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.case-detail__comment-body {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-text);
  line-height: 2.0;
}

/* ==============================
   Responsive - Tablet (max-width: 1024px)
   ============================== */
@media (max-width: 1024px) {
  .articles {
    padding: 32px 20px 64px;
  }

  .articles-filter {
    padding: 28px 20px 0;
  }

  .articles__link {
    gap: 12px;
  }
}

/* ==============================
   Responsive - Tablet (max-width: 1024px)
   ============================== */
@media (max-width: 1024px) {
  /* 記事詳細 */
  .article-detail {
    padding: 32px 24px 64px;
  }

  .article-detail__inner {
    max-width: 680px;
  }

  .article-detail__title {
    font-size: 22px;
  }

  /* 記事内CTA */
  .article-cta {
    padding: 40px 24px;
  }

  /* 関連事例・戻りボタン */
  .article-detail__back {
    margin-top: 40px;
  }

  /* case-detail */
  .case-detail__lead {
    font-size: 15px;
    line-height: 2.0;
  }

  .case-detail__section-title {
    font-size: 18px;
  }

  .case-detail__comment {
    padding: 20px;
  }
}

/* ==============================
   Responsive - SP (max-width: 768px)
   ============================== */
@media (max-width: 768px) {
  .articles-filter {
    padding: 24px 16px 0;
  }

  .articles-filter__list {
    gap: 6px;
  }

  .articles-filter__btn {
    font-size: 14px;
    padding: 6px 16px;
  }

  .articles {
    padding: 24px 16px 48px;
  }

  .articles__link {
    flex-wrap: wrap;
    gap: 4px 10px;
    padding: 16px 0;
  }

  .articles__date {
    font-size: 14px;
  }

  .articles__category {
    font-size: 14px;
  }

  .articles__title {
    flex-basis: 100%;
    font-size: 14px;
    margin-top: 4px;
  }

  .articles__author {
    flex-basis: 100%;
    font-size: 14px;
    margin-top: 2px;
  }

  .articles__empty {
    font-size: 14px;
    padding: 40px 16px;
  }

  /* SP: 記事詳細 */
  .article-detail {
    padding: 24px 16px 48px;
  }

  .article-detail__title {
    font-size: 20px;
    margin-bottom: 28px;
    padding-bottom: 16px;
  }

  .article-detail__body {
    font-size: 14px;
  }

  .article-detail__body h2 {
    font-size: 18px;
  }

  .article-detail__body h3 {
    font-size: 16px;
  }

  .case-detail__info-row {
    flex-direction: column;
    gap: 2px;
  }

  .case-detail__info-label {
    width: auto;
  }

  /* SP: case-detail */
  .case-detail__lead {
    font-size: 14px;
    line-height: 1.9;
    margin-bottom: 28px;
  }

  .case-detail__section {
    margin-bottom: 24px;
    padding-bottom: 24px;
  }

  .case-detail__section-title {
    font-size: 20px;
    margin-bottom: 10px;
  }

  .case-detail__section-body {
    font-size: 14px;
    line-height: 1.9;
  }

  /* ジャンプ率検証: 20px ÷ 14px = 1.43 ✓ */

  .case-detail__client-meta {
    font-size: 13px;
    margin-bottom: 24px;
  }

  .case-detail__comment {
    padding: 16px;
    margin-top: 24px;
  }

  .case-detail__comment-title {
    font-size: 14px;
  }

  .case-detail__comment-body {
    font-size: 14px;
    line-height: 1.9;
  }

  /* SP: 記事内CTA */
  .article-cta {
    padding: 32px 16px;
  }

  .article-cta__heading {
    font-size: 18px;
  }

  .article-cta__sub {
    font-size: 14px;
  }

  .article-cta__sub strong {
    font-size: 16px;
  }

  .article-cta__buttons {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

  .article-cta__btn {
    width: 80%;
    text-align: center;
    font-size: 14px;
    padding: 12px 24px;
  }

  /* SP: 戻りボタン */
  .article-detail__back {
    margin-top: 32px;
  }

  .article-detail__back-link {
    font-size: 13px;
    padding: 10px 24px;
  }

  /* SP: hover無効化 */
  .articles__link:hover {
    background: none;
  }

  .articles__link:hover .articles__title {
    color: var(--color-text);
  }

  .articles-filter__btn:hover {
    color: #666;
    border-color: #ddd;
  }

  .article-cta__btn--primary:hover {
    background: var(--color-primary);
  }

  .article-cta__btn--line:hover {
    background: transparent;
    color: var(--color-cta-line);
  }

  .article-detail__back-link:hover {
    background: transparent;
    color: var(--color-primary);
  }

  /* SP: アニメーション移動量縮小 */
  @keyframes articlesItemUp {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
  }
}