/* 記事個別ページ CSS（/news/[slug] /diary/[slug]） */

/* ───── X フォロー誘導カード（記事末尾自動挿入） ───── */
.x-follow-card {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(139, 92, 246, 0.06));
  border: 1px solid rgba(0, 212, 255, 0.18);
  border-radius: 14px;
  padding: 2rem 1.8rem;
  margin: 3.5rem 0 0;
  text-align: center;
}
.x-follow-label {
  font-size: .78em;
  color: var(--c-cyan);
  letter-spacing: .14em;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: .6rem;
}
.x-follow-text {
  color: var(--ink);
  font-size: 1.02em;
  line-height: 1.7;
  margin-bottom: 1.4rem;
}
.x-follow-button {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  background: #000;
  color: #fff !important;
  padding: .85rem 1.7rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: .98em;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}
.x-follow-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 212, 255, 0.25);
}
.x-follow-button svg {
  flex-shrink: 0;
}
@media (max-width: 640px) {
  .x-follow-card { padding: 1.6rem 1.2rem; margin-top: 2.5rem; }
  .x-follow-text { font-size: .96em; }
  .x-follow-button { padding: .75rem 1.4rem; font-size: .92em; }
}

/* ───── Newsletter 購読フォーム (#214 Phase 3) ───── */
.newsletter-signup {
  margin: 2.5rem 0 0;
  padding: 2rem 1.6rem;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(0,212,255,0.08), rgba(0,128,255,0.04));
  border: 1px solid rgba(0,212,255,0.18);
}
.newsletter-label {
  font-weight: 700;
  font-size: 1.05em;
  margin-bottom: .5rem;
  color: var(--c-text, #111);
}
.newsletter-text {
  font-size: .95em;
  line-height: 1.7;
  color: var(--c-text-muted, #555);
  margin-bottom: 1.2rem;
}
.newsletter-form {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: .6rem;
}
.newsletter-input {
  padding: .7rem .9rem;
  font-size: .95em;
  border: 1px solid #d8d8d8;
  border-radius: 8px;
  background: #fff;
  font-family: inherit;
}
.newsletter-input:focus {
  outline: 2px solid var(--c-cyan, #00d4ff);
  outline-offset: -1px;
  border-color: transparent;
}
.newsletter-button {
  padding: .7rem 1.4rem;
  background: #000;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  font-size: .95em;
  transition: opacity .15s;
}
.newsletter-button:hover { opacity: .85; }
.newsletter-button:disabled { opacity: .5; cursor: wait; }
.newsletter-status {
  margin-top: .8rem;
  font-size: .9em;
  min-height: 1.2em;
}
.newsletter-status.ok { color: #2a8842; }
.newsletter-status.ng { color: #c43030; }
@media (max-width: 640px) {
  .newsletter-form { grid-template-columns: 1fr; }
  .newsletter-signup { padding: 1.6rem 1.2rem; }
}

/* ───── 四字熟語ボックス（YOJI_DATA） ───── */
.yoji-box {
  background: rgba(0, 212, 255, 0.06);
  border-left: 3px solid var(--c-cyan);
  padding: 1.2rem 1.5rem;
  margin: 2rem 0;
  border-radius: 4px;
}
.yoji-title {
  font-weight: 700;
  font-size: 1.1em;
  color: var(--ink);
  margin-bottom: .5rem;
  line-height: 1.5;
}
.yoji-yomi {
  font-weight: 400;
  font-size: .85em;
  color: var(--ink-mute);
  margin-left: .3em;
}
.yoji-meaning {
  color: var(--ink-soft);
  font-size: .98em;
  line-height: 1.7;
}
.yoji-meaning::before {
  content: "→ ";
  color: var(--c-cyan);
  font-weight: 700;
  margin-right: .2em;
}
@media (max-width: 640px) {
  .yoji-box { padding: 1rem 1.2rem; margin: 1.6rem 0; }
  .yoji-title { font-size: 1.02em; }
}


.post-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem 1.5rem 6rem;
}

.post {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* ───── Breadcrumb ───── */
.breadcrumb {
  display: flex;
  gap: .5rem;
  font-size: .85rem;
  color: var(--ink-mute);
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--ink-soft);
}
.breadcrumb a:hover { color: var(--c-cyan); }

/* ───── Header ───── */
.post-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.01em;
  margin: 0 0 1rem;
  color: var(--ink);
}
.post-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: .85rem;
  color: var(--ink-mute);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.post-meta time {
  font-family: var(--f-en);
  letter-spacing: .03em;
}
.post-meta .category a {
  color: var(--c-cyan);
  font-weight: 600;
  margin-right: .5rem;
}

.eyecatch {
  margin: 1.5rem 0 2rem;
  border-radius: 12px;
  overflow: hidden;
  background: var(--surface);
}
.eyecatch img {
  width: 100%;
  height: auto;
  display: block;
}

/* ───── Body ───── */
.post-body {
  font-size: 1.05rem;
  line-height: 2.05;
  color: var(--ink-warm);
  font-feature-settings: "palt" 0; /* JP 本文は等幅で読みやすく */
  letter-spacing: .01em;
  word-break: break-word;
  overflow-wrap: anywhere;
}
/* ブロック間の標準余白を WP 並みに広く取る */
.post-body > * + * { margin-top: 1.9rem; }
.post-body p {
  margin: 0;
  /* JP に最適化（句読点突き出しは avoid で安全に） */
  line-break: strict;
  text-align: left;
}
.post-body p + p { margin-top: 1.9rem; }
/* <br> による単改行にも視覚的な「行間以上」のスペースを与える */
.post-body p br {
  display: block;
  content: "";
  margin-top: .9rem;
}
.post-body h2, .post-body h3 {
  margin: 3rem 0 1.1rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ink);
  line-height: 1.5;
}
.post-body h2 {
  font-size: 1.5rem;
  padding-bottom: .5rem;
  border-bottom: 2px solid var(--line-strong);
}
.post-body h3 {
  font-size: 1.2rem;
}
.post-body a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.post-body strong { color: var(--ink); font-weight: 700; }
.post-body em { font-style: italic; color: var(--ink); }
.post-body code {
  background: var(--surface);
  padding: .1em .4em;
  border-radius: 4px;
  font-family: var(--f-mono);
  font-size: .9em;
  color: var(--c-cyan);
}
.post-body pre {
  background: var(--surface);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  border: 1px solid var(--line);
}
.post-body pre code {
  background: none;
  padding: 0;
  color: var(--ink-warm);
}
.post-body blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  border-left: 4px solid var(--accent);
  background: var(--surface-soft);
  color: var(--ink-soft);
  border-radius: 0 8px 8px 0;
}
.post-body ul, .post-body ol {
  padding-left: 1.5rem;
}
.post-body li { margin: .5rem 0; line-height: 1.85; }
.post-body li + li { margin-top: .75rem; }

.post-body figure {
  margin: 2rem 0;
}
.post-body figure img {
  border-radius: 8px;
  width: 100%;
}
.post-body figcaption {
  margin-top: .5rem;
  font-size: .85rem;
  color: var(--ink-mute);
  text-align: center;
}

.post-body .video-embed {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: 8px;
  background: #000;
  margin: 2rem 0;
}
.post-body .video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.post-body hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 2rem 0;
}

.post-body .callout {
  background: var(--surface);
  border-left: 4px solid var(--c-amber);
  padding: 1rem 1.25rem;
  border-radius: 0 8px 8px 0;
  margin: 1.5rem 0;
}
.post-body details {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: .75rem 1rem;
  margin: 1rem 0;
}
.post-body summary {
  cursor: pointer;
  font-weight: 600;
}

/* ───── Tags ───── */
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}
.tag {
  display: inline-block;
  padding: .35rem .75rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: .8rem;
  color: var(--ink-soft);
  transition: all .2s;
}
.tag:hover {
  background: var(--c-cyan);
  color: var(--bg);
  border-color: var(--c-cyan);
  opacity: 1;
}

/* ───── Mobile ───── */
@media (max-width: 640px) {
  .post-main { padding: 2rem 1rem 4rem; }
  .post-body { font-size: 1rem; line-height: 1.95; }
  .post-body > * + * { margin-top: 1.6rem; }
  .post-body p + p { margin-top: 1.6rem; }
  .post-body h2 { font-size: 1.3rem; margin: 2.4rem 0 1rem; }
  .post-body h3 { font-size: 1.1rem; margin: 2rem 0 .8rem; }
}

/* ═══════════════════════════════════════════════════
   関連記事セクション（5/27 夜追加）
   タグマッチングで自動抽出された 3 件を表示
   内部リンク強化 → ページ深さ +20% / 滞在時間 UP / SEO 評価 UP
═══════════════════════════════════════════════════ */
.related-posts {
  margin: 4rem auto 2rem;
  padding: 2.5rem 0 0;
  border-top: 1px solid rgba(255,255,255,.1);
  max-width: 760px;
}
.related-posts-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--c-cyan);
  letter-spacing: 0.02em;
}
.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.related-card {
  display: flex;
  flex-direction: column;
  background: rgba(255,255,255,.02);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 10px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all .25s ease;
}
.related-card:hover {
  background: rgba(255,255,255,.05);
  border-color: var(--c-cyan);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,.3);
}
.related-card-img {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: rgba(255,255,255,.05);
}
.related-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}
.related-card:hover .related-card-img img {
  transform: scale(1.05);
}
.related-card-title {
  padding: 0.85rem 1rem 1rem;
  font-size: 0.92rem;
  line-height: 1.5;
  font-weight: 500;
  color: var(--ink, #e8eaed);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
/* Mobile: 1 列に */
@media (max-width: 640px) {
  .related-posts { padding: 2rem 0 0; margin: 3rem auto 1.5rem; }
  .related-posts-grid { grid-template-columns: 1fr; gap: 1rem; }
  .related-card-img { aspect-ratio: 21 / 9; }
}