/* ============================================
   缀雨博客 · 文章详情页样式
   ============================================ */

/* ---- 文章加载状态 ---- */
.article-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 80px 24px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ---- 文章布局 ---- */
.article-main { padding-bottom: 80px; }
.article-container { max-width: 1200px; padding-top: 0; }

.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  padding-top: 48px;
  align-items: start;
}

/* ---- 文章主体 ---- */
.article-body {
  min-width: 0;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  backdrop-filter: blur(8px);
}

/* 文章头部 */
.article-header {
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  transition: color var(--transition);
}
.article-back:hover { color: var(--accent); }

.article-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 500;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.article-tag {
  padding: 4px 12px;
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  border-radius: 14px;
  font-size: 0.8rem;
  color: var(--accent);
  transition: all var(--transition);
  cursor: pointer;
}
.article-tag:hover {
  background: rgba(121,192,255,0.18);
  transform: scale(1.05);
}

/* ---- Markdown 内容 ---- */
.markdown-body {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
  font-family: var(--font-serif);
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  font-family: var(--font-serif);
  font-weight: 500;
  color: var(--text);
  margin: 2em 0 0.75em;
  line-height: 1.4;
  scroll-margin-top: 80px;
}

.markdown-body h1 {
  font-size: 1.8em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3em;
}
.markdown-body h2 {
  font-size: 1.4em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3em;
}
.markdown-body h3 { font-size: 1.2em; }
.markdown-body h4 { font-size: 1.05em; }

.markdown-body p { margin: 0 0 1.2em; }

.markdown-body a {
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), color var(--transition);
}
.markdown-body a:hover {
  color: var(--accent2);
  border-bottom-color: var(--accent);
}

.markdown-body blockquote {
  margin: 1.5em 0;
  padding: 16px 20px;
  border-left: 3px solid var(--accent);
  background: rgba(121,192,255,0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-muted);
  font-style: italic;
}
.markdown-body blockquote p { margin: 0; }

.markdown-body ul,
.markdown-body ol {
  margin: 0 0 1.2em;
  padding-left: 1.6em;
}
.markdown-body li { margin-bottom: 0.4em; }

.markdown-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.9em;
}
.markdown-body th,
.markdown-body td {
  padding: 10px 16px;
  border: 1px solid var(--border);
  text-align: left;
}
.markdown-body th {
  background: var(--bg2);
  font-weight: 500;
  color: var(--accent);
}
.markdown-body tr:nth-child(even) { background: rgba(255,255,255,0.02); }

.markdown-body code {
  padding: 2px 6px;
  background: var(--bg3);
  border-radius: var(--radius-sm);
  font-size: 0.875em;
  font-family: 'Cascadia Code', 'Fira Code', 'Courier New', monospace;
  color: #e06c75;
}

.markdown-body pre {
  margin: 1.5em 0;
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  background: #282c34;
}
.markdown-body pre code {
  padding: 0;
  background: transparent;
  color: inherit;
  font-size: 0.875em;
  border-radius: 0;
  display: block;
  overflow-x: auto;
  padding: 20px;
}

.code-block-wrap { position: relative; }
.code-copy-btn {
  position: absolute;
  top: 10px; right: 10px;
  padding: 4px 10px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.7);
  font-size: 0.75rem;
  font-family: var(--font-sans);
  transition: all var(--transition);
  z-index: 1;
  cursor: pointer;
}
.code-copy-btn:hover {
  background: rgba(121,192,255,0.2);
  color: var(--accent);
  border-color: var(--accent);
}
.code-copy-btn.copied {
  color: #56d364;
  border-color: rgba(86,211,100,0.4);
}

.markdown-body img {
  max-width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin: 1em 0;
}

.markdown-body strong {
  color: var(--accent2);
  font-weight: 600;
}
.markdown-body em { font-style: italic; }

/* ---- 文章导航 ---- */
.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.article-nav-btn {
  padding: 16px 20px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
}
.article-nav-btn:hover {
  background: var(--card-hover);
  border-color: rgba(121,192,255,0.2);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.article-nav-btn.prev { text-align: left; }
.article-nav-btn.next { text-align: right; align-items: flex-end; }
.nav-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-title {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.4;
  font-family: var(--font-serif);
}

/* ---- 侧边栏 ---- */
.article-sidebar {
  position: sticky;
  top: 88px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  backdrop-filter: blur(8px);
}
.sidebar-title {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 目录 */
.toc-nav { display: flex; flex-direction: column; gap: 4px; }
.toc-link {
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
  cursor: pointer;
}
.toc-link:hover,
.toc-link.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-glow);
}
.toc-link.h3 { padding-left: 20px; font-size: 0.75rem; }
.toc-link.h4 { padding-left: 32px; font-size: 0.75rem; }
.toc-empty {
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 8px;
  text-align: center;
}

/* 相关文章 */
.related-list { display: flex; flex-direction: column; gap: 0; }
.related-item {
  display: flex;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
  cursor: pointer;
}
.related-item:last-child { border-bottom: none; }
.related-item:hover .related-title { color: var(--accent); }

.related-num {
  font-size: 1.1rem;
  font-weight: 700;
  color: rgba(121,192,255,0.2);
  font-family: var(--font-serif);
  min-width: 24px;
  line-height: 1.4;
}
.related-title {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
  transition: color var(--transition);
}
.related-date {
  font-size: 0.7rem;
  color: rgba(139,148,158,0.7);
  margin-top: 2px;
}

/* ---- 留言板 ---- */
.comment-section {
  margin-top: 60px;
  padding: 40px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
}

.comment-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--text);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.comment-form-wrap { margin-bottom: 40px; }
.comment-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
}
.form-group label {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
}
.required { color: #ff8080; }
.optional { color: var(--text-muted); font-weight: 400; font-size: 0.8rem; }

.form-group input,
.form-group textarea {
  padding: 10px 14px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.9rem;
  font-family: var(--font-sans);
  transition: all var(--transition);
  outline: none;
  resize: vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); opacity: 0.7; }
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.char-count {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: right;
  margin-top: 4px;
}
.btn-submit {
  align-self: flex-start;
  padding: 10px 28px;
  background: linear-gradient(135deg, #1d6eb5, #79c0ff);
  color: #fff;
  border-radius: 24px;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: var(--font-sans);
  transition: all var(--transition);
  box-shadow: 0 4px 12px rgba(121,192,255,0.2);
  cursor: pointer;
  border: none;
}
.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(121,192,255,0.3);
}
.btn-submit:active { transform: translateY(0); }
.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}
.comment-status {
  margin-top: 12px;
  font-size: 0.875rem;
  min-height: 24px;
}
.comment-status.success { color: #56d364; }
.comment-status.error { color: #ff8080; }

/* 留言项 */
.comment-item {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  animation: fadeInUp 0.4s ease both;
}
.comment-item:last-child { border-bottom: none; }

.comment-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1d6eb5, #79c0ff);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  font-family: var(--font-serif);
  color: #fff;
  font-weight: 500;
}
.comment-body { flex: 1; }
.comment-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.comment-author {
  font-weight: 500;
  color: var(--text);
  font-size: 0.9rem;
}
.comment-time {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.comment-text {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.7;
}
.comment-text p { margin: 0; }
.loading-comments {
  text-align: center;
  color: var(--text-muted);
  padding: 24px;
  font-size: 0.9rem;
}
.no-comments {
  text-align: center;
  color: var(--text-muted);
  padding: 32px;
  font-size: 0.9rem;
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: none; }
  .article-body { padding: 28px; }
}
@media (max-width: 768px) {
  .article-nav { grid-template-columns: 1fr; }
  .article-header { margin-bottom: 28px; padding-bottom: 20px; }
  .form-row { grid-template-columns: 1fr; }
  .comment-section { padding: 24px 20px; }
}
@media (max-width: 480px) {
  .article-body { padding: 20px 16px; }
  .article-title { font-size: 1.4rem; }
}