/* ===== 記事詳細ページ ===== */
.post-bg {
  background: #f8f9ff;
}

.post-container {
  max-width: 800px;
  margin: 0 auto;
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
}

.post-thumbnail img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  display: block;
}

.post-content {
  padding: 40px;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.post-date {
  font-size: 0.85rem;
  color: #888;
}

.post-title {
  font-size: 1.6rem;
  font-weight: bold;
  color: #1a1a2e;
  line-height: 1.5;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 2px solid #e8eaf0;
}

.post-body {
  font-size: 1rem;
  line-height: 2;
  color: #444;
}

.post-body p {
  margin-bottom: 20px;
}

.post-back {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid #e8eaf0;
}

.post-back a {
  color: #0f3460;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: bold;
}

.post-back a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .post-content {
    padding: 24px 20px;
  }

  .post-title {
    font-size: 1.3rem;
  }

  .post-thumbnail img {
    height: 220px;
  }
}