/* ============================================================
   个人博客样式 — 简洁、现代、响应式
   ============================================================ */

:root {
  --bg: #f7f8fa;
  --bg-card: #ffffff;
  --text: #1f2430;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --primary: #4f6ef7;
  --primary-dark: #3b55d9;
  --primary-soft: #eef1fe;
  --danger: #e5484d;
  --danger-soft: #fdecec;
  --success: #30a46c;
  --success-soft: #e9f9f0;
  --warning: #f5a524;
  --warning-soft: #fef4e6;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.06), 0 1px 2px rgba(16, 24, 40, 0.04);
  --shadow-lg: 0 8px 24px rgba(16, 24, 40, 0.1);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --content-width: 760px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--primary-dark);
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 顶部导航 ---------- */

.site-header {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.3px;
}

.logo:hover {
  color: var(--primary);
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  color: var(--text-muted);
  font-weight: 500;
}

.nav-link:hover {
  color: var(--text);
  background: var(--bg);
}

.nav-link-accent {
  color: var(--primary);
  background: var(--primary-soft);
}

.nav-link-accent:hover {
  color: var(--primary-dark);
  background: var(--primary-soft);
}

.nav-link-btn {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 500;
}

.inline-form {
  display: inline;
}

/* ---------- 主内容 ---------- */

.main-content {
  min-height: calc(100vh - 200px);
  padding-top: 32px;
  padding-bottom: 64px;
}

/* ---------- 提示消息 ---------- */

.flash-container {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.flash {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  animation: fadeIn 0.3s ease;
}

.flash-success {
  background: var(--success-soft);
  color: var(--success);
  border: 1px solid rgba(48, 164, 108, 0.25);
}

.flash-danger {
  background: var(--danger-soft);
  color: var(--danger);
  border: 1px solid rgba(229, 72, 77, 0.25);
}

.flash-warning {
  background: var(--warning-soft);
  color: var(--warning);
  border: 1px solid rgba(245, 165, 36, 0.3);
}

.flash-info {
  background: var(--primary-soft);
  color: var(--primary-dark);
  border: 1px solid rgba(79, 110, 247, 0.25);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Hero ---------- */

.hero {
  text-align: center;
  padding: 40px 0 32px;
}

.hero h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.hero-sub {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ---------- 搜索与分类 ---------- */

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 28px;
}

.search-form {
  display: flex;
  flex: 1;
  min-width: 220px;
  max-width: 360px;
}

.search-form input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  font-family: inherit;
  font-size: 0.92rem;
  background: var(--bg-card);
  color: var(--text);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.search-form input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 110, 247, 0.12);
}

.search-form button {
  padding: 10px 18px;
  border: none;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--primary);
  color: #fff;
  font-family: inherit;
  font-size: 0.92rem;
  cursor: pointer;
  transition: background 0.15s ease;
}

.search-form button:hover {
  background: var(--primary-dark);
}

.category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all 0.15s ease;
}

.chip:hover {
  color: var(--primary);
  border-color: var(--primary);
}

.chip-active {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}

.chip-active:hover {
  color: #fff;
}

.chip-small {
  padding: 3px 10px;
  font-size: 0.78rem;
}

/* ---------- 文章列表 ---------- */

.post-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.post-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.post-card-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}

.post-card-title a {
  color: var(--text);
}

.post-card-title a:hover {
  color: var(--primary);
}

.post-card-excerpt {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.read-more {
  font-size: 0.9rem;
  font-weight: 600;
}

.empty-state {
  text-align: center;
  padding: 60px 0;
  color: var(--text-muted);
}

/* ---------- 分页 ---------- */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-top: 36px;
}

.pagination a {
  padding: 8px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.92rem;
  transition: all 0.15s ease;
}

.pagination a:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.page-info {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ---------- 文章详情 ---------- */

.post {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 48px;
  box-shadow: var(--shadow);
}

.post-header {
  margin-bottom: 28px;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.post-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.35;
}

.post-admin-actions {
  display: flex;
  gap: 10px;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

/* ---------- Markdown 正文 ---------- */

.markdown-body {
  font-size: 1.02rem;
  line-height: 1.85;
  word-wrap: break-word;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  margin-top: 1.6em;
  margin-bottom: 0.6em;
  font-weight: 700;
  line-height: 1.4;
  font-family: var(--font-serif);
}

.markdown-body h1 { font-size: 1.7rem; }
.markdown-body h2 { font-size: 1.45rem; padding-bottom: 0.3em; border-bottom: 1px solid var(--border); }
.markdown-body h3 { font-size: 1.25rem; }

.markdown-body p {
  margin-bottom: 1em;
}

.markdown-body a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.markdown-body strong {
  font-weight: 700;
}

.markdown-body ul,
.markdown-body ol {
  margin: 0 0 1em 1.6em;
}

.markdown-body li {
  margin-bottom: 0.3em;
}

.markdown-body blockquote {
  margin: 1em 0;
  padding: 4px 16px;
  border-left: 4px solid var(--primary);
  background: var(--primary-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-muted);
}

.markdown-body code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.88em;
  background: #f1f2f6;
  padding: 2px 6px;
  border-radius: 4px;
}

.markdown-body pre {
  background: #1e2430;
  color: #e5e9f0;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin-bottom: 1em;
  font-size: 0.9rem;
  line-height: 1.6;
}

.markdown-body pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1em;
  font-size: 0.95rem;
}

.markdown-body th,
.markdown-body td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}

.markdown-body th {
  background: var(--bg);
  font-weight: 600;
}

.markdown-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5em 0;
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-block;
  padding: 9px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
}

.btn-ghost {
  background: var(--bg-card);
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-danger {
  background: var(--danger-soft);
  color: var(--danger);
  border-color: transparent;
}

.btn-danger:hover {
  background: var(--danger);
  color: #fff;
}

.btn-block {
  width: 100%;
}

.btn-xs {
  padding: 4px 10px;
  font-size: 0.8rem;
}

.link-danger {
  border: none;
  background: none;
  color: var(--danger);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
  padding: 0;
}

.link-danger:hover {
  text-decoration: underline;
}

/* ---------- 表单 ---------- */

.form-group {
  margin-bottom: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  background: var(--bg-card);
  color: var(--text);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 110, 247, 0.12);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-content {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9rem;
  line-height: 1.7;
}

.form-help {
  display: block;
  margin-top: 4px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.form-error {
  display: block;
  margin-top: 4px;
  font-size: 0.82rem;
  color: var(--danger);
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

/* ---------- 评论 ---------- */

.comments {
  margin-top: 40px;
}

.comments-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.comment {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 14px;
  box-shadow: var(--shadow);
}

.comment-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.comment-author {
  font-weight: 700;
  color: var(--text);
  font-size: 0.95rem;
}

.comment-del {
  margin-left: auto;
}

.comment-body {
  font-size: 0.95rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.empty-comments {
  color: var(--text-muted);
  padding: 16px 0;
}

.comment-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-top: 28px;
  box-shadow: var(--shadow);
}

.comment-form h3 {
  font-size: 1.05rem;
  margin-bottom: 16px;
}

/* ---------- 登录 ---------- */

.auth-card {
  max-width: 420px;
  margin: 40px auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
}

.auth-title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
}

.auth-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 8px 0 24px;
}

/* ---------- 管理后台 ---------- */

.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.page-head h1 {
  font-size: 1.6rem;
  font-weight: 700;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow);
}

.stat-number {
  display: block;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 28px;
  box-shadow: var(--shadow);
}

.panel-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.table th,
.table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.table th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
}

.table-actions {
  white-space: nowrap;
  display: flex;
  gap: 8px;
  align-items: center;
}

.table-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 28px;
}

/* ---------- 错误页 ---------- */

.error-page {
  text-align: center;
  padding: 80px 0;
}

.error-code {
  font-size: 5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 12px;
}

.error-text {
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* ---------- 页脚 ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* ---------- 响应式 ---------- */

@media (max-width: 768px) {
  .post { padding: 28px 22px; }
  .post-title { font-size: 1.6rem; }
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .stat-card { padding: 14px 8px; }
  .stat-number { font-size: 1.4rem; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .search-form { max-width: none; }
  .nav-link { padding: 8px 8px; font-size: 0.88rem; }
}