.blog-header {
  padding: 3rem 1.5rem 2rem;
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.blog-header__eyebrow {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--color-matcha);
}

.blog-header__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.9rem;
  color: var(--color-matcha-deep);
}

.blog-header__back {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--color-matcha);
  text-decoration: none;
}

.blog-header__back:hover { color: var(--color-matcha-deep); }

.post-list {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.post-card {
  display: block;
  padding: 1.4rem 1.5rem;
  border: 1px solid var(--color-line);
  border-radius: 12px;
  background: #ffffff;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.post-card:hover {
  border-color: var(--color-matcha);
  transform: translateY(-1px);
}

.post-card__date {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-matcha);
}

.post-card__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-matcha-deep);
}

.post-card__excerpt {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-matcha-deep);
  opacity: 0.85;
  line-height: 1.6;
}

.post-list__empty,
.post-list__error {
  text-align: center;
  color: var(--color-matcha);
  padding: 2.5rem 0;
  opacity: 0.85;
}

/* --- 記事詳細ページ(post.html) --- */

.post-detail {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

.post-detail__date {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-matcha);
}

.post-detail__title {
  margin: 0 0 1.8rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.7rem;
  color: var(--color-matcha-deep);
}

.post-detail__body {
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--color-matcha-deep);
}

.post-detail__body h1,
.post-detail__body h2,
.post-detail__body h3 {
  font-family: var(--font-display);
  color: var(--color-matcha-deep);
  margin-top: 2rem;
}

.post-detail__body pre {
  background: #F5F3E8;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.post-detail__body code {
  font-family: var(--font-mono);
  background: #F5F3E8;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85em;
}

.post-detail__body pre code { background: none; padding: 0; }

.post-detail__body blockquote {
  margin: 1.2rem 0;
  padding: 0.2rem 1rem;
  border-left: 3px solid var(--color-matcha);
  color: var(--color-matcha);
}

.post-detail__body table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.2rem 0;
}

.post-detail__body th,
.post-detail__body td {
  border: 1px solid var(--color-line);
  padding: 0.5rem 0.75rem;
  text-align: left;
  font-size: 0.88rem;
}