/* ===== 記事ページ共通 ===== */
.post-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 7rem 2rem 4rem;
}

.post-header {
  margin-bottom: 2.5rem;
  border-bottom: 1px solid #e5e7eb;
  padding-bottom: 1.5rem;
}

.post-date {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 0.5rem;
}

.post-header h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 0.8rem;
}

.post-tag {
  display: inline-block;
  background: #e0f2fe;
  color: var(--color-primary-dark);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.2rem 0.8rem;
  border-radius: 50px;
}

.post-body {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--color-text);
}

.post-body p {
  color: var(--color-text);
  margin-bottom: 1.4rem;
}

.post-body h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  color: var(--color-text);
}

.post-body h2::after {
  display: none;
}

.back-link {
  display: inline-block;
  margin-top: 3rem;
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--color-primary-dark);
}

/* ===== ロゴリンク ===== */
.logo a {
  text-decoration: none;
  color: var(--color-primary);
}