/* ================================================================
   single.css — 記事ページ専用スタイル (F3)
   ================================================================ */

/* ── パンくずリスト ──────────────────────────────────────────── */
.entry-breadcrumb {
  max-width: 720px;
  margin-inline: auto;
  margin-bottom: 1.25rem;
  font-family: var(--font-ui);
  font-size: 0.73rem;
  color: var(--ink-soft);
}
.entry-breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.15em 0.1em;
  align-items: center;
}
.entry-breadcrumb li { display: flex; align-items: center; }
.entry-breadcrumb li + li::before {
  content: '/';
  margin-inline: 0.4em;
  color: var(--brass-shadow);
  line-height: 1;
}
.entry-breadcrumb a {
  color: var(--brass-deep);
  text-decoration: none;
}
.entry-breadcrumb a:hover { color: var(--brass); text-decoration: none; }
.entry-breadcrumb [aria-current] { color: var(--ink-soft); }

/* ── カテゴリバッジ ──────────────────────────────────────────── */
.entry-cat-badge {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dark-plate);
  background: var(--brass);
  padding: 0.25em 0.8em;
  border-radius: 2px;
  margin-bottom: 0.65rem;
  text-decoration: none;
  transition: background 0.15s;
}
.entry-cat-badge:hover {
  background: var(--brass-light);
  text-decoration: none;
}

/* ── アイキャッチ画像（ブラス枠） ───────────────────────────── */
.entry-thumbnail {
  max-width: 720px;
  margin-inline: auto;
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
  border: 2px solid var(--brass-shadow);
  box-shadow:
    0 4px 16px rgba(107, 82, 32, 0.18),
    inset 0 0 0 1px rgba(232, 199, 126, 0.25);
  overflow: hidden;
  border-radius: 2px;
}
.entry-thumbnail img {
  width: 100%;
  height: auto;
  display: block;
}

/* ── 本文タイポグラフィ強化 ─────────────────────────────────── */
.entry-content h2 {
  font-family: var(--font-body);
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  font-weight: 700;
  color: var(--ink);
  border-left: 4px solid var(--brass);
  padding: 0.15em 0 0.15em 0.7em;
  margin-top: 2.5em;
  margin-bottom: 0.8em;
  line-height: 1.45;
}
.entry-content h3 {
  font-family: var(--font-body);
  font-size: clamp(1rem, 2vw, 1.18rem);
  font-weight: 700;
  color: var(--brass-deep);
  border-bottom: 1px solid rgba(139, 111, 46, 0.35);
  padding-bottom: 0.3em;
  margin-top: 2em;
  margin-bottom: 0.65em;
}
.entry-content h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink-soft);
  margin-top: 1.5em;
  margin-bottom: 0.4em;
}

/* ── コールアウトボックス（4種） ────────────────────────────── */
.callout {
  margin-block: 1.75em;
  padding: 0.9rem 1.2rem 0.9rem 1rem;
  border-left: 4px solid;
  border-radius: 2px;
  position: relative;
}
.callout-label {
  display: flex;
  align-items: center;
  gap: 0.4em;
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.55em;
}
.callout-body {
  font-size: 0.93rem;
  line-height: 1.75;
}
.callout-body > :first-child { margin-top: 0; }
.callout-body > :last-child  { margin-bottom: 0; }

/* note (情報・補足) — ネオンブルー */
.callout-note {
  border-left-color: var(--neon);
  background: rgba(79, 195, 247, 0.07);
}
.callout-note .callout-label { color: #1E88D8; }

/* tip (ヒント・おすすめ) — グリーン */
.callout-tip {
  border-left-color: #4CAF7D;
  background: rgba(76, 175, 125, 0.08);
}
.callout-tip .callout-label { color: #2E7D55; }

/* warning (注意・警告) — オレンジ */
.callout-warning {
  border-left-color: #E8842A;
  background: rgba(232, 132, 42, 0.08);
}
.callout-warning .callout-label { color: #B85C10; }

/* point (ポイント・重要) — ブラス */
.callout-point {
  border-left-color: var(--brass);
  background: var(--ivory);
}
.callout-point .callout-label { color: var(--brass-deep); }

/* ── note/CTA バナー ────────────────────────────────────────── */
.entry-cta {
  margin-block: clamp(2rem, 4vw, 3rem);
  margin-inline: auto;
  max-width: 720px;
  padding: clamp(1.5rem, 3vw, 2rem) clamp(1.25rem, 3vw, 2rem);
  background: var(--dark-plate);
  border: 1px solid var(--brass-shadow);
  border-top: 2px solid var(--brass);
  border-radius: 2px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.entry-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent, transparent 39px,
    rgba(212, 169, 90, 0.04) 39px, rgba(212, 169, 90, 0.04) 40px
  );
  pointer-events: none;
}
.entry-cta__lead {
  position: relative;
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brass-mid);
  margin: 0 0 0.5rem;
}
.entry-cta__text {
  position: relative;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--cream);
  line-height: 1.75;
  margin: 0 0 1.25rem;
}
.entry-cta__text strong { color: var(--brass-light); }
.entry-cta__btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.7em 1.75em;
  background: var(--neon);
  color: var(--dark-plate);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 3px;
  transition: opacity 0.15s, transform 0.15s;
}
.entry-cta__btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
  text-decoration: none;
}

/* ── 著者プロフィール ────────────────────────────────────────── */
.entry-author {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  align-items: start;
  margin-top: clamp(2rem, 4vw, 3rem);
  margin-inline: auto;
  max-width: 720px;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  background: var(--ivory);
  border: 1px solid rgba(139, 111, 46, 0.3);
  border-left: 4px solid var(--brass);
  border-radius: 2px;
}
.entry-author__avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--brass);
  flex-shrink: 0;
}
.entry-author__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}
.entry-author__name {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 0.4rem;
}
.entry-author__bio {
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.8;
  margin: 0 0 0.75rem;
}
.entry-author__links {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.entry-author__link {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--brass-deep);
  text-decoration: none;
  border: 1px solid var(--brass-shadow);
  padding: 0.25em 0.75em;
  border-radius: 2px;
  transition: background 0.15s, color 0.15s;
}
.entry-author__link:hover {
  background: var(--brass);
  color: var(--dark-plate);
  text-decoration: none;
  border-color: var(--brass);
}

/* ── 関連記事 ───────────────────────────────────────────────── */
.related-posts {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  max-width: 720px;
  margin-inline: auto;
}
.related-posts__title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brass);
  margin: 0 0 1.25rem;
}
.related-posts__title::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brass);
  box-shadow: 0 0 6px var(--brass-light);
  flex-shrink: 0;
}
.related-posts__title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--brass-shadow), transparent);
}
.related-posts__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

/* ── レスポンシブ ────────────────────────────────────────────── */
@media (max-width: 640px) {
  .related-posts__grid {
    grid-template-columns: 1fr;
  }
  .entry-author {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .entry-author__avatar { margin: 0 auto; }
  .entry-author__links  { justify-content: center; }
}