/* ============================================
   Column List — 記事一覧 (column/index.php)
   ============================================ */

.s-column-list {
  padding: var(--s-10) 0 var(--s-12);
  position: relative;
  overflow: hidden;
}

/* 記事なしメッセージ */
.s-column-list__empty {
  text-align: center;
  padding: var(--s-10) 0;
  color: var(--c-muted);
}

.s-column-list__empty i {
  font-size: 2.5rem;
  margin-bottom: var(--s-4);
  display: block;
  opacity: 0.4;
}

/* カードグリッド: 3カラム（SP=1, Tablet=2, PC=3） */
.s-column-list__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-6);
}

@media (min-width: 600px) {
  .s-column-list__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .s-column-list__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--s-8);
  }
}

/* 背景装飾アクセント */
.s-column-list__bg-accent {
  position: absolute;
  top: 10%;
  right: -5%;
  width: 600px;
  height: 600px;
  z-index: 0;
  pointer-events: none;
  filter: blur(40px);
}

.s-column-list .l-container {
  position: relative;
  z-index: 1;
}

/* ============================================
   Column Card — 記事カード（3カラム版）
   ============================================ */

.s-column-card {
  height: 100%;
}

.s-column-card__link {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: #fff;
  border-radius: var(--r-md);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
  border: 1px solid rgba(0, 0, 0, 0.03);
}

.s-column-card__link:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

/* サムネイル */
.s-column-card__thumb-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: var(--c-light-gray);
  overflow: hidden;
}

.s-column-card__thumb-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.s-column-card__link:hover .s-column-card__thumb-wrapper img {
  transform: scale(1.05);
}

.s-column-card__thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--c-gold-light);
  background: linear-gradient(135deg, #f9f9f9 0%, #ececec 100%);
}

.s-column-card__badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(44, 62, 80, 0.85);
  color: #fff;
  font-family: var(--f-family-en);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 20px;
  backdrop-filter: blur(4px);
  letter-spacing: 0.05em;
}

/* ボディ領域 */
.s-column-card__body {
  padding: var(--s-5);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.s-column-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--c-text);
  margin-bottom: var(--s-3);
  display: -webkit-box;
  line-clamp: 2;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.s-column-card__summary {
  font-size: 0.875rem;
  color: var(--c-muted);
  line-height: 1.6;
  margin-bottom: var(--s-4);
  flex-grow: 1;
}

/* タグリスト */
.s-column-card__tags {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.s-column-card__tag {
  font-size: 0.75rem;
  color: var(--c-gold);
  background-color: rgba(220, 182, 122, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
}

/* アクション・ボタン */
.s-column-card__action {
  padding: 0 var(--s-5) var(--s-5);
  display: flex;
  justify-content: flex-end;
}

.s-column-card__read-more {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--c-text);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s ease;
}

.s-column-card__read-more i {
  font-size: 0.8em;
  color: var(--c-gold);
  transition: transform 0.2s ease;
}

.s-column-card__link:hover .s-column-card__read-more {
  color: var(--c-gold);
}

.s-column-card__link:hover .s-column-card__read-more i {
  transform: translateX(4px);
}

/* ============================================
   Column Single — 個別記事 (column/single.php)
   ============================================ */

.s-column-single {
  padding: var(--s-7) 0 var(--s-12);
}

/* 2カラムレイアウト */
.s-column-single__layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--s-8);
  align-items: start;
}

/* 記事メインエリア */
.s-column-single__main {
  min-width: 0;
}

/* 記事ヘッダー */
.s-column-single__header {
  margin-bottom: var(--s-7);
  padding-bottom: var(--s-6);
  border-bottom: 1px solid var(--c-border);
  max-width: 720px;
}

.s-column-single__date {
  display: inline-block;
  font-size: var(--f-size-sm);
  color: var(--c-gold);
  font-family: var(--ff-serif);
  letter-spacing: 0.08em;
  margin-bottom: var(--s-3);
}

.s-column-single__date i {
  margin-right: 4px;
}

.s-column-single__title {
  font-family: var(--ff-serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1.5;
  margin-bottom: var(--s-3);
}

.s-column-single__subtitle {
  font-size: var(--f-size-md);
  color: var(--c-muted);
  line-height: 1.6;
  margin-bottom: var(--s-4);
}

.s-column-single__tags {
  display: flex;
  gap: var(--s-2);
  flex-wrap: wrap;
  margin-bottom: var(--s-3);
}

.s-column-single__tag {
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 9999px;
  background: var(--c-surface-2);
  color: var(--c-muted);
  letter-spacing: 0.05em;
}

.s-column-single__author {
  font-size: var(--f-size-sm);
  color: var(--c-muted);
}

.s-column-single__author i {
  color: var(--c-gold);
  margin-right: 4px;
}

/* 記事本文 */
.s-column-single__body {
  margin-bottom: var(--s-8);
  max-width: 720px;
}

.s-column-single__body p {
  font-size: 1rem;
  line-height: 2.2;
  color: var(--c-text-main);
  margin-bottom: 2em;
  text-align: justify;
  letter-spacing: 0.04em;
}

.s-column-single__body h3 {
  font-family: var(--ff-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-ink);
  margin-top: 2.5em;
  margin-bottom: 1em;
  position: relative;
  padding-left: var(--s-4);
}

.s-column-single__body h3::before {
  content: "";
  position: absolute;
  top: 0.2em;
  bottom: 0.2em;
  left: 0;
  width: 3px;
  background: var(--c-gold);
  border-radius: 2px;
  opacity: 0.8;
}

.s-column-single__body h4 {
  font-family: var(--ff-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--c-gold-dark);
  margin-top: 2em;
  margin-bottom: 0.8em;
}

.s-column-single__body blockquote {
  margin: 2em 0;
  padding: var(--s-5) var(--s-6);
  background: var(--c-surface-2);
  border-left: 3px solid var(--c-gold);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  font-family: var(--ff-serif);
  font-style: normal;
  color: var(--c-ink);
}

.s-column-single__body blockquote p {
  margin-bottom: 0;
  line-height: 1.8;
}

.s-column-single__body a {
  color: var(--c-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.s-column-single__body a:hover {
  border-bottom-color: var(--c-accent);
}

.s-column-single__body .article-figure {
  margin: 2.5em 0;
}

.s-column-single__body .article-figure img {
  border-radius: var(--r-sm);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  border: 1px solid rgba(0, 0, 0, 0.03);
  max-height: 600px;
  width: auto;
  object-fit: contain;
}

.s-column-single__body .article-figure figcaption {
  margin-top: var(--s-3);
  font-size: 0.85rem;
  color: var(--c-muted);
  text-align: center;
  letter-spacing: 0.05em;
}

.s-column-single__body .article-separator {
  border: none;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--c-gold) 30%,
    var(--c-gold) 70%,
    transparent
  );
  opacity: 0.3;
  margin: 2em 0;
}

/* ============================================
   出典・胡蝶公式HP誘導セクション
   ============================================ */

.s-column-single__source-note {
  position: relative;
  margin-top: var(--s-10);
  padding: var(--s-8) var(--s-6);
  background: var(--c-surface-2);
  border-radius: var(--r-md);
  border: none;
  text-align: center;
  overflow: hidden;
  max-width: 720px;
}

.s-column-single__source-note::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url("/assets/images/common/stamp_kochou_signature_01.webp");
  background-size: 140px;
  background-repeat: no-repeat;
  background-position: calc(100% + 20px) calc(100% + 20px);
  opacity: 0.1;
  pointer-events: none;
}

.s-column-single__source-heading {
  font-family: var(--ff-serif);
  font-size: var(--f-size-md);
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: var(--s-3);
}

.s-column-single__source-heading i {
  color: var(--c-gold);
  margin-right: var(--s-2);
}

.s-column-single__source-text {
  font-size: var(--f-size-sm);
  color: var(--c-text);
  line-height: 1.8;
  margin-bottom: var(--s-4);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.s-column-single__source-link {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-3) var(--s-6);
  border-radius: 9999px;
  border: 1px solid var(--c-gold);
  text-decoration: none;
  color: var(--c-gold);
  font-size: var(--f-size-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  transition:
    background 0.3s,
    color 0.3s,
    transform 0.2s;
}

.s-column-single__source-link:hover {
  background: var(--c-gold);
  color: #fff;
  transform: translateY(-1px);
}

.s-column-single__source-link i:last-child {
  font-size: 0.7em;
  opacity: 0.7;
}

/* ============================================
   前後記事ナビゲーション
   ============================================ */

.s-column-single__nav {
  margin-top: var(--s-10);
  padding-top: var(--s-8);
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  max-width: 720px;
}

.s-column-single__nav-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-4);
  margin-bottom: var(--s-6);
}

.s-column-single__nav-item {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  padding: var(--s-5);
  background: var(--c-surface);
  border-radius: var(--r-md);
  border: 1px solid rgba(0, 0, 0, 0.04);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
  text-decoration: none;
  color: inherit;
  transition:
    background 0.3s,
    transform 0.3s,
    box-shadow 0.3s,
    border-color 0.3s;
}

.s-column-single__nav-item:hover {
  background: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
  border-color: rgba(220, 182, 122, 0.3);
}

.s-column-single__nav-item--next {
  text-align: right;
}

.s-column-single__nav-item--empty {
  pointer-events: none;
  background: transparent;
  border: none;
  box-shadow: none;
}

.s-column-single__nav-label {
  font-size: var(--f-size-xs);
  color: var(--c-gold);
  letter-spacing: 0.1em;
  font-weight: 500;
}

.s-column-single__nav-title {
  font-family: var(--ff-serif);
  font-size: var(--f-size-sm);
  color: var(--c-ink);
  line-height: 1.5;
}

.s-column-single__nav-back {
  text-align: center;
}

.s-column-single__nav-back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-3) var(--s-5);
  border-radius: 9999px;
  border: 1px solid var(--c-border);
  text-decoration: none;
  color: var(--c-muted);
  font-size: var(--f-size-sm);
  transition:
    border-color 0.2s,
    color 0.2s,
    background 0.2s;
}

.s-column-single__nav-back-link:hover {
  border-color: var(--c-gold);
  color: var(--c-ink);
  background: var(--c-surface);
}

/* ============================================
   Sidebar — サイドバー
   ============================================ */

.s-column-sidebar {
  position: sticky;
  top: 100px;
}

.s-column-sidebar__inner {
  background: var(--c-surface);
  border-radius: var(--r-md);
  border: 1px solid var(--c-border);
  padding: var(--s-5);
  box-shadow: var(--sh-1);
}

.s-column-sidebar__heading {
  font-family: var(--ff-serif);
  font-size: var(--f-size-sm);
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: var(--s-4);
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--c-border);
}

.s-column-sidebar__heading i {
  color: var(--c-gold);
  margin-right: var(--s-2);
}

.s-column-sidebar__list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--s-4) 0;
}

.s-column-sidebar__item {
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.s-column-sidebar__item:last-child {
  border-bottom: none;
}

.s-column-sidebar__link {
  display: block;
  padding: var(--s-3);
  text-decoration: none;
  color: inherit;
  transition:
    background 0.2s,
    padding-left 0.2s;
  border-radius: var(--r-sm);
  position: relative;
}

.s-column-sidebar__link:hover {
  background: rgba(0, 0, 0, 0.02);
  padding-left: var(--s-4);
}

.s-column-sidebar__link.is-current {
  color: var(--c-gold-dark);
  font-weight: 600;
  padding-left: var(--s-4);
  background: var(--c-gold-light);
}

.s-column-sidebar__link.is-current::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 40%;
  background: var(--c-gold);
  border-radius: 2px;
}

.s-column-sidebar__date {
  display: block;
  font-size: 0.7rem;
  color: var(--c-gold);
  font-family: var(--ff-serif);
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}

.s-column-sidebar__title {
  display: block;
  font-size: var(--f-size-sm);
  color: var(--c-ink);
  line-height: 1.4;
  font-weight: 500;
}

.s-column-sidebar__all-link {
  display: block;
  text-align: center;
  font-size: var(--f-size-xs);
  color: var(--c-muted);
  text-decoration: none;
  padding: var(--s-2);
  border-radius: var(--r-sm);
  transition: color 0.2s;
}

.s-column-sidebar__all-link:hover {
  color: var(--c-gold);
}

.s-column-sidebar__all-link i {
  margin-left: 4px;
  transition: transform 0.2s;
}

.s-column-sidebar__all-link:hover i {
  transform: translateX(2px);
}

/* ============================================
   SP Responsive
   ============================================ */

@media (max-width: 1024px) {
  .s-column-single__layout {
    grid-template-columns: 1fr;
    gap: var(--s-6);
  }

  .s-column-sidebar {
    position: static;
  }

  .s-column-sidebar__inner {
    border-radius: var(--r-sm);
  }
}

@media (max-width: 768px) {
  .s-column-single {
    padding: var(--s-5) 0 var(--s-8);
  }

  .s-column-single__title {
    font-size: 1.3rem;
  }

  .s-column-single__nav-grid {
    grid-template-columns: 1fr;
    gap: var(--s-3);
  }

  .s-column-single__nav-item--next {
    text-align: left;
  }

  .s-column-list {
    padding: var(--s-7) 0 var(--s-8);
  }
}