/* 기본 설정 */
:root { --header-height: 70px; --max-width: 1200px; --card-background: #1e293b; --post-padding: 2.5rem; --accent-color: #60a5fa; --text-primary: #f8fafc; --text-secondary: #94a3b8; --border-color: #2d3748; --shadow-sm: 0 2px 4px rgba(0,0,0,0.2); --shadow-md: 0 4px 6px rgba(0,0,0,0.3); --shadow-lg: 0 10px 15px rgba(0,0,0,0.3); }

.post-wrapper { margin-top: var(--header-height); min-height: calc(100vh - var(--header-height)); background: #0f172a; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1rem; }

.post-detail { background: var(--card-background); border-radius: 16px; box-shadow: var(--shadow-md); margin: 2rem auto; overflow: hidden; }

.post-header { padding: var(--post-padding); border-bottom: 1px solid var(--border-color); }

.post-meta { display: flex; align-items: center; gap: 1.5rem; color: var(--text-secondary); font-size: 0.95rem; }

.post-category { background: var(--accent-color); color: white; padding: 0.4rem 1rem; border-radius: 20px; font-weight: 500; font-size: 0.9rem; }

.post-views { display: flex; align-items: center; gap: 0.5rem; }

.post-title { font-size: 1.5rem; line-height: 1.3; margin: 1.5rem 0 1rem; color: var(--text-primary); font-weight: 700; word-break: keep-all; }

.post-description { font-size: 1.2rem; line-height: 1.6; color: var(--text-secondary); margin: 0; }

.post-content { padding: var(--post-padding); }

.markdown-body { font-size: 1.1rem; line-height: 1.8; color: var(--text-primary); }

.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4, .markdown-body h5, .markdown-body h6 { margin-top: 2em; margin-bottom: 1em; font-weight: 600; line-height: 1.3; color: var(--text-primary); }

.markdown-body h1 { font-size: 2.2rem; }
.markdown-body h2 { font-size: 1.8rem; }
.markdown-body h3 { font-size: 1.5rem; }

.related-posts { margin: 5rem 0 3rem; padding: 3rem 0; border-top: 1px solid var(--border-color); background: var(--card-background); }

.related-title { font-size: 1.75rem; font-weight: 700; margin-bottom: 2.5rem; text-align: center; color: var(--text-primary); position: relative; padding-bottom: 1rem; }

.related-title::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 60px; height: 3px; background: var(--accent-color); border-radius: 3px; }

.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 2rem; padding: 0; margin: 0 auto; list-style: none; max-width: 1400px; }

.related-item { background: var(--card-background); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-md); transition: all 0.3s ease; position: relative; border: 1px solid var(--border-color); }

.related-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }

.related-image-wrapper { position: relative; padding-top: 66.67%; background: #2a3849; overflow: hidden; }

.related-image { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }

.related-item:hover .related-image { transform: scale(1.05); }

.related-content { padding: 1.5rem; background: var(--card-background); position: relative; }

.related-post-title { margin: 0; font-size: 1.1rem; font-weight: 600; line-height: 1.5; color: var(--text-primary); overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; min-height: 3em; }

.related-item { opacity: 0; animation: fadeIn 0.6s ease forwards; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

.related-item:nth-child(1) { animation-delay: 0.1s; }
.related-item:nth-child(2) { animation-delay: 0.2s; }
.related-item:nth-child(3) { animation-delay: 0.3s; }

/* 태블릿 이하 (768px) */
@media (max-width: 768px) {
  :root {
    --post-padding: 0.75rem;
  }

  .container {
    max-width: 100% !important;
    margin: 0 !important;
    /* 좌우 여백을 더 줄여 넓게 보이도록 */
    padding: 0 0.3rem !important; 
  }
  .post-detail {
    margin: 0;
    border-radius: 0;
    width: 100%;
  }
  /* 모바일에서 제목 더 작게 */
  .post-title {
    font-size: 1.3rem; /* 기존 1.6rem에서 추가 축소 */
    font-weight: 600;
  }
  .post-description {
    font-size: 1.1rem;
  }
  .post-navigation {
    grid-template-columns: 1fr;
    padding: 0.75rem 0.5rem;
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 1rem;
  }
  .markdown-body {
    font-size: 1rem;
    line-height: 1.8;
    padding: 0;
  }
  .markdown-body h1 {
    font-size: 1.5rem; /* 조금 더 줄임 */
  }
  .markdown-body h2 {
    font-size: 1.3rem;
  }
  .related-posts h2 {
    font-size: 1.6rem;
    margin-bottom: 2rem;
  }
  .related-image {
    height: 180px;
  }
  .post-content {
    padding: 0.5rem 0.3rem;
  }
  .post-header {
    padding: 0.75rem 0.5rem;
  }
  .markdown-body img {
    /* 음수 마진 제거, 기본 여백 */
    margin: 1rem auto !important;
  }
}

/* 모바일 이하 (480px) */
@media (max-width: 480px) {
  :root {
    --post-padding: 0.5rem;
  }
  .post-meta {
    flex-wrap: wrap;
    gap: 0.8rem;
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 8px;
  }
  .related-content {
    padding: 0.8rem 0.5rem;
  }
  .related-title {
    font-size: 1rem;
    margin-bottom: 0.5rem;
  }
  .related-image {
    height: 140px;
  }
  .post-header {
    padding: 0.5rem 0.3rem;
  }
  .post-content {
    padding: 0.3rem 0.2rem;
  }
  /* 초소형 화면에서 제목을 더 작게 */
  .post-title {
    font-size: 1.2rem; 
    margin: 0.8rem 0 0.6rem;
  }
  .post-description {
    font-size: 0.95rem;
  }
  .markdown-body {
    font-size: 0.95rem;
  }
  .markdown-body img {
    margin: 0.8rem auto !important;
  }
  .markdown-body pre {
    padding: 0.8rem 0.3rem;
    margin: 1rem 0;
    width: 100%;
  }
  .markdown-body blockquote {
    padding: 0.8rem 0.5rem;
    margin: 1rem 0;
    width: 100%;
  }
  .post-files {
    padding: 0.5rem 0.3rem;
  }
  .post-navigation {
    padding: 0.5rem 0.3rem;
    gap: 0.8rem;
  }
  .prev-post,
  .next-post {
    padding: 0.8rem 0.5rem;
  }
  .related-posts {
    padding: 1.5rem 0 1rem;
  }
  .file-link {
    padding: 0.6rem 0.5rem;
  }
}
.related-link {
  text-decoration: none;
}