/* ==============================
   single-style.css
   通常投稿（コラム）詳細ページ用
============================== */

/* ---- アイキャッチ ---- */
.single-eyecatch {
  margin-top: 80px;
  /* ヘッダー高さ分 */
  width: 100%;
  height: 60vh;
  min-height: 420px;
  position: relative;
  overflow: hidden;
}

.single-eyecatch__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.75);
}

.single-eyecatch__fallback {
  width: 100%;
  height: 100%;
  background: var(--color-accent);
}

.single-eyecatch__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 64px 80px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.58) 0%, transparent 65%);
}

.single-eyecatch__category {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 16px;
}

.single-eyecatch__title {
  font-family: var(--font-ja);
  font-size: clamp(20px, 2.8vw, 36px);
  font-weight: 400;
  color: #fff;
  letter-spacing: 0.06em;
  line-height: 1.7;
  max-width: 760px;
}

.single-eyecatch__meta {
  margin-top: 16px;
}

.single-post-date {
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.5);
}

/* ---- 2カラムレイアウト ---- */
.single-layout {
  max-width: 1160px;
  margin: 0 auto;
  padding: 72px 48px 120px;
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 80px;
  align-items: start;
}

/* ---- 本文エリア ---- */
.single-body {
  min-width: 0;
}

/* WordPressが出力するthe_content()内のスタイル */
.single-content h2 {
  font-family: var(--font-ja);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--color-black);
  margin: 64px 0 24px;
  padding-bottom: 14px;
  border-bottom: 0.5px solid rgba(0, 0, 0, 0.1);
  position: relative;
}

.single-content h2::before {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 40px;
  height: 1px;
  background: var(--color-accent);
}

.single-content h3 {
  font-family: var(--font-ja);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.05em;
  line-height: 1.7;
  color: var(--color-black);
  margin: 40px 0 16px;
  padding-left: 14px;
  border-left: 2px solid var(--color-accent);
}

.single-content p {
  font-size: 15px;
  line-height: 2.1;
  letter-spacing: 0.04em;
  color: #3a3a3a;
  margin-bottom: 24px;
}

.single-content img {
  width: 100%;
  height: auto;
  margin: 32px 0;
  display: block;
}

.single-content blockquote {
  margin: 32px 0;
  padding: 20px 28px;
  background: var(--color-gray);
  border-left: 3px solid var(--color-accent);
  font-size: 14px;
  line-height: 2;
  color: #555;
  letter-spacing: 0.04em;
}

.single-content ul,
.single-content ol {
  margin: 0 0 24px 1.4em;
  font-size: 15px;
  line-height: 2.1;
  letter-spacing: 0.04em;
  color: #3a3a3a;
}

.single-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---- タグ ---- */
.single-tags {
  margin-top: 56px;
  padding-top: 32px;
  border-top: 0.5px solid rgba(0, 0, 0, 0.1);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.single-tag {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--color-text-muted);
  border: 0.5px solid rgba(0, 0, 0, 0.12);
  padding: 5px 14px;
  transition: border-color 0.3s, color 0.3s;
}

.single-tag:hover {
  color: var(--color-black);
  border-color: var(--color-black);
}

/* ---- 前後ナビ ---- */
.single-postnav {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 0.5px solid rgba(0, 0, 0, 0.1);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.single-postnav__item a {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px 28px;
  background: var(--color-gray);
  transition: background 0.3s;
}

.single-postnav__item a:hover {
  background: #ececea;
}

.single-postnav__label {
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--color-text-muted);
}

.single-postnav__title {
  font-size: 13px;
  letter-spacing: 0.04em;
  line-height: 1.7;
}

.single-postnav__item--next a {
  text-align: right;
}

/* ---- TOCサイドバー ---- */
.single-toc {
  position: sticky;
  top: 108px;
  /* ヘッダー高さ + 余白 */
}

.single-toc__label {
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.single-toc__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  border-left: 1px solid rgba(0, 0, 0, 0.1);
}

.single-toc__list li {
  /* JSで生成 */
}

.single-toc__list a {
  display: block;
  padding: 9px 16px;
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--color-text-muted);
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: color 0.25s, border-color 0.25s;
}

.single-toc__list a:hover {
  color: var(--color-black);
}

.single-toc__list a.is-active {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
  font-weight: 500;
}

/* h3はインデント */
.single-toc__list a[data-level="h3"] {
  padding-left: 28px;
  font-size: 11px;
}

/* ---- 読書進捗 ---- */
.single-toc__progress {
  margin-top: 28px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.single-toc__progress-bar {
  flex: 1;
  height: 1px;
  background: rgba(0, 0, 0, 0.1);
  position: relative;
}

.single-toc__progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0%;
  background: var(--color-accent);
  transition: width 0.2s ease;
}

.single-toc__progress-label {
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  white-space: nowrap;
  min-width: 28px;
}

/* ==============================
   Responsive
============================== */
@media (max-width: 1024px) {
  .single-layout {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 48px 32px 80px;
  }

  /* SP/タブレットではTOCを本文上に */
  .single-toc {
    position: static;
    order: -1;
    background: var(--color-gray);
    padding: 24px 28px;
    margin-bottom: 48px;
  }
}

@media (max-width: 768px) {
  .single-eyecatch {
    margin-top: 64px;
    /* SP版ヘッダー高さ */
    height: 50vh;
    min-height: 300px;
  }

  .single-eyecatch__overlay {
    padding: 32px 24px;
  }

  .single-postnav {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .single-postnav__item--next a {
    text-align: left;
  }
}

/* ---- single.phpヘッダー固定スタイル ---- */
.is-single-post .site-header {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 0.5px solid rgba(0, 0, 0, 0.08);
}

.is-single-post .site-header .logo-en {
  color: var(--color-black);
}

.is-single-post .site-header .logo-ja {
  color: rgba(0, 0, 0, 0.45);
}

.is-single-post .global-nav a {
  color: rgba(0, 0, 0, 0.7);
}

.is-single-post .header-sns a {
  color: rgba(0, 0, 0, 0.5);
}

@media (max-width: 1200px) {
  .is-single-post .site-header {
    background: rgba(255, 255, 255, 0.88);
  }

  .is-single-post .nav-toggle span {
    background: var(--color-black);
  }
}