/* ===== 后台管理样式 ===== */
:root {
  --accent: #1a7a5e;
  --accent-light: #e8f5f0;
  --accent-hover: #145c47;
  --bg: #f0f2f5;
  --card-bg: #ffffff;
  --text: #2c2c2c;
  --text-secondary: #5a5a5a;
  --text-muted: #888;
  --border: #e8e8e8;
  --danger: #e74c3c;
  --danger-light: #fdf2f2;
  --blue: #3498db;
  --radius: 8px;
  --topbar-h: 52px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: Georgia, "Songti SC", serif;
  --font-mono: "Fira Code", "Courier New", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--font-sans); background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.6; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* ===== 顶部导航栏 ===== */
.admin-topbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--topbar-h);
  background: var(--card-bg); border-bottom: 1px solid var(--border);
  z-index: 100; box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.admin-topbar-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  height: 100%; display: flex; align-items: center; gap: 24px;
}
.admin-brand {
  font-family: var(--font-serif); font-size: 1.15rem; font-weight: bold;
  color: var(--text); white-space: nowrap;
}
.admin-brand span { font-size: 0.8rem; color: var(--text-muted); font-family: var(--font-sans); font-weight: normal; }
.admin-nav { display: flex; gap: 4px; flex: 1; }
.nav-item {
  padding: 6px 14px; border-radius: 6px; color: var(--text-secondary);
  font-size: 0.9rem; transition: all 0.15s;
}
.nav-item:hover { background: var(--accent-light); color: var(--accent); }
.nav-item.active { background: var(--accent); color: #fff; }
.admin-user { display: flex; align-items: center; gap: 12px; font-size: 0.85rem; }
.view-blog { color: var(--text-muted); }
.view-blog:hover { color: var(--accent); }
.admin-user-name { color: var(--text); font-weight: 600; }
.logout-link { color: var(--danger); }
.admin-nav-toggle { display: none; flex-direction: column; gap: 4px; background: none; border: none; cursor: pointer; padding: 6px; }
.admin-nav-toggle span { width: 20px; height: 2px; background: var(--text); border-radius: 2px; }

/* ===== 主内容区 ===== */
.admin-body { padding-top: var(--topbar-h); max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; padding-bottom: 48px; }
.admin-page { padding-top: 24px; }
.page-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.admin-page-title { font-size: 1.35rem; font-weight: 700; display: flex; align-items: center; gap: 10px; }
.count-badge {
  font-size: 0.75rem; font-weight: 600; color: var(--accent);
  background: var(--accent-light); padding: 2px 10px; border-radius: 10px;
}

/* ===== 统计卡片 ===== */
.stat-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.stat-card {
  background: var(--card-bg); border-radius: var(--radius); padding: 20px 24px;
  border: 1px solid var(--border);
}
.stat-value { font-size: 1.8rem; font-weight: 700; color: var(--text); line-height: 1.2; }
.stat-label { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

/* ===== 卡片网格 ===== */
.admin-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; }
.admin-card {
  background: var(--card-bg); border-radius: var(--radius); border: 1px solid var(--border);
  overflow: hidden;
}
.card-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; border-bottom: 1px solid var(--border);
}
.card-head h3 { font-size: 0.95rem; font-weight: 600; }
.link-more { font-size: 0.85rem; color: var(--accent); }

/* ===== 数据表格 ===== */
.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
  text-align: left; padding: 10px 20px; font-size: 0.8rem; font-weight: 600;
  color: var(--text-muted); background: #fafafa; border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.data-table td { padding: 12px 20px; border-bottom: 1px solid var(--border); font-size: 0.88rem; vertical-align: middle; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: #fafcfc; }
.empty-row { text-align: center; color: var(--text-muted); padding: 32px 0 !important; }
.row-link { color: var(--text); font-weight: 500; }
.row-link:hover { color: var(--accent); }
.muted { color: var(--text-muted); font-size: 0.82rem; }
.row-actions { display: flex; gap: 6px; white-space: nowrap; }

/* ===== 徽章 ===== */
.badge { display: inline-block; padding: 2px 10px; border-radius: 10px; font-size: 0.75rem; font-weight: 500; }
.badge-green { background: var(--accent-light); color: var(--accent); }
.badge-gray { background: #f0f0f0; color: var(--text-muted); }

/* ===== 小标签 ===== */
.tag-mini {
  display: inline-block; padding: 1px 8px; font-size: 0.75rem;
  background: var(--accent-light); color: var(--accent); border-radius: 10px; margin: 2px;
}
.tag-mini em { font-style: normal; opacity: 0.6; margin-left: 2px; }
.tag-cloud-mini { padding: 16px 20px; }

/* ===== 按钮 ===== */
.btn-primary, .btn-secondary {
  display: inline-block; padding: 8px 20px; border-radius: 6px; font-size: 0.88rem;
  border: none; cursor: pointer; transition: all 0.15s; text-decoration: none;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; }
.btn-secondary { background: #f0f0f0; color: var(--text-secondary); }
.btn-secondary:hover { background: #e8e8e8; color: var(--text); }
.btn-lg { padding: 10px 28px; font-size: 0.95rem; }
.btn-block { width: 100%; text-align: center; }
.btn-sm {
  display: inline-block; padding: 4px 12px; border-radius: 4px; font-size: 0.8rem;
  border: 1px solid var(--border); background: var(--card-bg); color: var(--text-secondary);
  cursor: pointer; transition: all 0.15s;
}
.btn-sm:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm.btn-blue { color: var(--blue); border-color: var(--blue); }
.btn-sm.btn-blue:hover { background: var(--blue); color: #fff; }
.btn-sm.btn-red { color: var(--danger); border-color: var(--danger); }
.btn-sm.btn-red:hover { background: var(--danger); color: #fff; }

/* ===== 表单 ===== */
.edit-form { max-width: 860px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: 0.85rem; font-weight: 600; color: var(--text);
  margin-bottom: 6px;
}
.form-group .required { color: var(--danger); }
.form-group .hint { font-weight: 400; color: var(--text-muted); font-size: 0.8rem; }
.form-group input[type=text],
.form-group input[type=password],
.form-group textarea,
.form-group select {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 6px;
  font-size: 0.9rem; font-family: var(--font-sans); color: var(--text); background: var(--card-bg);
  transition: border-color 0.15s;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light);
}
.form-group textarea { resize: vertical; }
.input-lg { font-size: 1.05rem !important; font-family: var(--font-serif) !important; }
.form-row-2 { display: grid; grid-template-columns: 1fr 160px; gap: 16px; }
.form-actions { display: flex; gap: 12px; margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--border); }
.form-section { margin-bottom: 32px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.form-section-title { font-size: 1rem; font-weight: 700; margin-bottom: 16px; color: var(--text); }

/* ===== Markdown 编辑器 ===== */
.editor-toolbar {
  display: flex; gap: 4px; border: 1px solid var(--border); border-bottom: none;
  border-radius: 6px 6px 0 0; padding: 4px; background: #fafafa;
}
.tab-btn {
  padding: 6px 18px; border: none; background: none; cursor: pointer;
  font-size: 0.85rem; color: var(--text-muted); border-radius: 4px; transition: all 0.15s;
}
.tab-btn:hover { background: var(--card-bg); color: var(--text); }
.tab-btn.active { background: var(--card-bg); color: var(--accent); font-weight: 600; box-shadow: 0 1px 2px rgba(0,0,0,0.04); }
.toolbar-sep { width: 1px; background: var(--border); margin: 4px 6px; align-self: stretch; }
.tool-btn {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 6px 12px; border: none; background: none; cursor: pointer;
  font-size: 0.82rem; color: var(--text-muted); border-radius: 4px; transition: all 0.15s;
}
.tool-btn:hover { background: var(--card-bg); color: var(--accent); }
.tool-btn svg { opacity: 0.7; }
.tool-btn:hover svg { opacity: 1; }
.upload-status { font-size: 0.82rem; margin-left: auto; align-self: center; }
.upload-status.loading { color: var(--blue); }
.upload-status.success { color: var(--accent); }
.upload-status.error { color: var(--danger); }
.editor-wrap { border: 1px solid var(--border); border-radius: 0 0 6px 6px; overflow: hidden; }
.content-editor {
  width: 100%; min-height: 420px; padding: 16px 20px; border: none;
  font-size: 0.92rem; font-family: var(--font-mono); line-height: 1.7;
  color: var(--text); background: var(--card-bg); resize: vertical; outline: none;
}
.content-preview {
  min-height: 420px; padding: 16px 20px; overflow-y: auto;
  font-size: 0.95rem; line-height: 1.8;
}

/* ===== 提示框 ===== */
.alert-error {
  background: var(--danger-light); color: var(--danger); padding: 12px 16px;
  border-radius: 6px; margin-bottom: 20px; font-size: 0.88rem;
}
.alert-success {
  background: var(--accent-light); color: var(--accent); padding: 12px 16px;
  border-radius: 6px; margin-bottom: 20px; font-size: 0.88rem;
}
.alert-success a { font-weight: 600; }

/* ===== 分页 ===== */
.admin-pagination { padding: 20px 0; }
.pagination { display: flex; align-items: center; justify-content: center; gap: 16px; }
.page-link {
  display: inline-block; padding: 6px 16px; background: var(--card-bg);
  border: 1px solid var(--border); border-radius: 6px; color: var(--text-secondary);
  font-size: 0.85rem; transition: all 0.15s;
}
.page-link:hover { border-color: var(--accent); color: var(--accent); }
.page-info { color: var(--text-muted); font-size: 0.85rem; }

/* ===== 登录页 ===== */
.login-page {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; background: var(--bg);
}
.login-card {
  background: var(--card-bg); border-radius: 12px; padding: 40px;
  width: 100%; max-width: 380px; box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.login-logo {
  font-family: var(--font-serif); font-size: 1.6rem; font-weight: bold;
  text-align: center; color: var(--accent); margin-bottom: 4px;
}
.login-title { text-align: center; font-size: 0.95rem; color: var(--text-muted); margin-bottom: 28px; }
.login-form .form-group { margin-bottom: 18px; }
.login-form label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; }
.login-form input {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 6px;
  font-size: 0.92rem; transition: border-color 0.15s;
}
.login-form input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light); }
.back-link { display: block; text-align: center; margin-top: 20px; color: var(--text-muted); font-size: 0.85rem; }

/* ===== Markdown 渲染（复用前台样式） ===== */
.markdown-body { font-size: 1rem; line-height: 1.8; color: var(--text); }
.markdown-body h1, .markdown-body h2, .markdown-body h3 { font-weight: bold; margin: 1.4em 0 0.5em; }
.markdown-body h1 { font-size: 1.5em; } .markdown-body h2 { font-size: 1.3em; } .markdown-body h3 { font-size: 1.1em; }
.markdown-body p { margin-bottom: 1em; }
.markdown-body ul, .markdown-body ol { margin-bottom: 1em; padding-left: 1.6em; }
.markdown-body li { margin-bottom: 0.3em; }
.markdown-body blockquote { margin: 1em 0; padding: 0.5em 1em; border-left: 3px solid var(--accent); background: var(--accent-light); border-radius: 0 4px 4px 0; color: var(--text-secondary); }
.markdown-body code { font-family: var(--font-mono); font-size: 0.88em; background: #f0f0f0; padding: 2px 6px; border-radius: 4px; }
.markdown-body pre { margin: 1em 0; padding: 14px 16px; background: #2d2d2d; border-radius: 6px; overflow-x: auto; }
.markdown-body pre code { background: none; color: #f8f8f2; }
.markdown-body strong { font-weight: 700; }
.markdown-body a { color: var(--accent); }
.markdown-body hr { border: none; height: 1px; background: var(--border); margin: 1.5em 0; }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .stat-cards { grid-template-columns: repeat(2, 1fr); }
  .admin-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .admin-topbar-inner { padding: 0 16px; gap: 12px; }
  .admin-nav-toggle { display: flex; }
  .admin-nav {
    position: absolute; top: var(--topbar-h); left: 0; right: 0;
    flex-direction: column; background: var(--card-bg);
    border-bottom: 1px solid var(--border); padding: 8px 16px 12px;
    gap: 2px; transform: translateY(-100%); opacity: 0; visibility: hidden;
    transition: all 0.2s;
  }
  .admin-nav.admin-nav-open { transform: translateY(0); opacity: 1; visibility: visible; }
  .admin-user { display: none; }
  .admin-body { padding-left: 16px; padding-right: 16px; }
}
@media (max-width: 480px) {
  .stat-cards { grid-template-columns: 1fr; }
  .form-row-2 { grid-template-columns: 1fr; }
  .page-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .data-table { font-size: 0.82rem; }
  .data-table th, .data-table td { padding: 8px 12px; }
}

/* ===== Checkbox 样式 ===== */
.checkbox-label {
  display: flex; align-items: center; gap: 8px;
  cursor: pointer; padding: 8px 0; font-size: 0.9rem;
}
.checkbox-label input[type="checkbox"] {
  width: 18px; height: 18px; cursor: pointer; accent-color: var(--accent, #1a7a5e);
}

/* ===== 置顶 badge ===== */
.badge-orange { background: #ff9800; color: #fff; }