/* =========================================================
   Component / Post Navigation（前後の記事・作品への導線）
   single.php と single-portfolio.php で共通利用
   ========================================================= */
.c-post-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.c-post-nav--bordered {
  margin-top: 48px;
  margin-bottom: 0;
  padding-top: 48px;
  border-top: 1px solid var(--border);
}

.c-post-nav__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: var(--transition);
  max-width: 300px;
}
.c-post-nav__link:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.c-post-nav__link--next { margin-left: auto; text-align: right; }

.c-post-nav__label { display: block; font-size: 0.75rem; color: var(--text-faint); margin-bottom: 4px; }
.c-post-nav__title { display: block; font-weight: 600; font-size: 0.9375rem; }

@media (max-width: 768px) {
  .c-post-nav { flex-direction: column; }
  .c-post-nav__link { max-width: 100%; }
}