/* ============================================================
   个人博客微信小程序系统 - 管理后台设计系统 v3
   定位：开发者向 · 阅读优先 · 双主题 · 克制设计
   规范：低饱和配色 / 统一6px圆角 / 无渐变无阴影 / 留白系统 / 微噪点
   ============================================================ */
:root {
  --bg: #f8fafc;
  --bg-soft: #f1f5f9;
  --card: #ffffff;
  --text: #1e293b;
  --text-2: #64748b;
  --text-3: #94a3b8;
  --border: #e2e8f0;
  --brand: #3b82f6;
  --brand-hover: #2563eb;
  --brand-soft: #eff6ff;
  --success: #059669;
  --success-soft: #ecfdf5;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --warning: #d97706;
  --warning-soft: #fffbeb;
  --radius: 6px;
  --sidebar-w: 220px;
  --grid-dot: rgba(100, 116, 139, .045);
}

html[data-theme="dark"] {
  --bg: #1e293b;
  --bg-soft: rgba(148, 163, 184, .08);
  --card: #263449;
  --text: #e2e8f0;
  --text-2: #94a3b8;
  --text-3: #64748b;
  --border: rgba(148, 163, 184, .16);
  --brand: #3b82f6;
  --brand-hover: #60a5fa;
  --brand-soft: rgba(59, 130, 246, .14);
  --success: #34d399;
  --success-soft: rgba(52, 211, 153, .12);
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, .12);
  --warning: #fbbf24;
  --warning-soft: rgba(251, 191, 36, .12);
  --grid-dot: rgba(148, 163, 184, .05);
}

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

html, body { height: 100%; }

body {
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  background-color: var(--bg);
  background-image: radial-gradient(var(--grid-dot) 1px, transparent 1px);
  background-size: 22px 22px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background-color .3s ease, color .3s ease;
}

a { color: var(--brand); text-decoration: none; }
::selection { background: rgba(59, 130, 246, .18); }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }
::-webkit-scrollbar-track { background: transparent; }

/* ============ 登录页 ============ */
.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-wrap { width: 100%; max-width: 380px; position: relative; }

.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 36px 28px;
}

.login-logo {
  width: 52px; height: 52px;
  margin: 0 auto 18px;
  border-radius: var(--radius);
  background: var(--brand);
  color: #fff;
  font-size: 24px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-title { text-align: center; font-size: 20px; font-weight: 700; color: var(--text); }
.login-sub { text-align: center; color: var(--text-2); font-size: 12px; margin: 6px 0 28px; letter-spacing: 2px; }
.login-error { color: var(--danger); font-size: 13px; min-height: 20px; margin-bottom: 10px; text-align: center; }
.login-tip {
  text-align: center; color: var(--text-2); font-size: 12px; margin-top: 20px;
  background: var(--bg-soft); border-radius: var(--radius); padding: 10px 12px;
}

.theme-toggle {
  position: fixed;
  top: 18px;
  right: 20px;
  z-index: 50;
  width: 38px; height: 38px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--text-2);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color .2s, color .2s, background-color .2s;
}
.theme-toggle:hover { border-color: var(--brand); color: var(--brand); }

/* ============ 布局 ============ */
.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  background: var(--card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 10;
  transition: background-color .3s ease;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 18px;
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
}

.sidebar-logo .logo-box {
  width: 34px; height: 34px;
  border-radius: var(--radius);
  background: var(--brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.nav { flex: 1; padding: 12px 10px; overflow-y: auto; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  margin-bottom: 2px;
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text-2);
  font-weight: 500;
  font-size: 14px;
  position: relative;
  transition: background-color .2s, color .2s;
  border-left: 2px solid transparent;
}
.nav-item:hover { background: var(--bg-soft); color: var(--text); }
.nav-item.active {
  background: var(--brand-soft);
  color: var(--brand);
  font-weight: 600;
  border-left-color: var(--brand);
}

.sidebar-footer {
  padding: 12px 10px;
  border-top: 1px solid var(--border);
}

.main { flex: 1; margin-left: var(--sidebar-w); min-width: 0; }

.topbar {
  height: 62px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px 0 24px;
  position: sticky;
  top: 0;
  z-index: 5;
  transition: background-color .3s ease;
}

.topbar h2 { font-size: 17px; font-weight: 700; color: var(--text); }

.topbar-right { display: flex; align-items: center; gap: 12px; }
.topbar-user { color: var(--text-2); font-size: 13px; }

.content { padding: 24px 28px 40px; }

.section { }

/* ============ 卡片 ============ */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 20px;
  transition: border-color .2s, background-color .3s;
}
.card:hover { border-color: var(--text-3); }

.card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
}

/* 统计 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  transition: border-color .2s, background-color .3s;
}
.stat-card:hover { border-color: var(--brand); }

.stat-num { font-size: 24px; font-weight: 700; color: var(--text); line-height: 1.2; }
.stat-label { color: var(--text-2); font-size: 12px; margin-top: 4px; }

/* ============ 表格 ============ */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table { width: 100%; border-collapse: collapse; }

th, td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 13.5px;
}

th {
  color: var(--text-2);
  font-weight: 600;
  font-size: 12px;
  background: var(--bg-soft);
}
td { color: var(--text); }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: var(--bg-soft); }

.cover-thumb {
  width: 56px; height: 38px;
  border-radius: var(--radius);
  object-fit: cover;
  background: var(--bg-soft);
  display: inline-block;
  vertical-align: middle;
}

.avatar-thumb {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  vertical-align: middle;
}

/* 骨架屏（柔和脉冲） */
.skeleton-row td { height: 42px; }
.skeleton {
  display: inline-block;
  width: 100%;
  height: 13px;
  border-radius: var(--radius);
  background: var(--bg-soft);
  animation: skeletonPulse 1.6s ease-in-out infinite;
}
@keyframes skeletonPulse { 0%, 100% { opacity: 1; } 50% { opacity: .45; } }

/* ============ 徽章 ============ */
.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius);
  font-size: 12px;
  line-height: 20px;
  font-weight: 500;
}
.badge-green  { background: var(--success-soft); color: var(--success); }
.badge-gray   { background: var(--bg-soft); color: var(--text-2); }
.badge-orange { background: var(--warning-soft); color: var(--warning); }
.badge-red    { background: var(--danger-soft); color: var(--danger); }
.badge-blue   { background: var(--brand-soft); color: var(--brand); }
.badge-purple { background: var(--brand-soft); color: var(--brand); }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  background: var(--card);
  color: var(--text);
  transition: border-color .2s, background-color .2s, color .2s, opacity .2s;
}
.btn:hover { border-color: var(--brand); color: var(--brand); }
.btn:active { opacity: .75; }

.btn-primary {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  font-weight: 600;
}
.btn-primary:hover { background: var(--brand-hover); border-color: var(--brand-hover); color: #fff; }

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

.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-block { width: 100%; padding: 11px; font-size: 15px; }

.toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; align-items: center; }
.toolbar .spacer { flex: 1; }

/* ============ 表单 ============ */
.form-item { margin-bottom: 16px; }
.form-item label { display: block; margin-bottom: 6px; color: var(--text-2); font-size: 13px; }

input[type="text"], input[type="password"], input[type="number"], select, textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  background: var(--card);
  color: var(--text);
  transition: border-color .2s, background-color .3s;
}
input:focus, select:focus, textarea:focus { border-color: var(--brand); }
textarea { resize: vertical; min-height: 80px; line-height: 1.8; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.search-input { width: 230px; }

/* ============ 弹窗 ============ */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .45);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal-mask.show { display: flex; }

.modal {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 660px;
  max-width: calc(100vw - 40px);
  max-height: 86vh;
  overflow-y: auto;
  padding: 24px;
}
.modal.modal-sm { width: 440px; }

.modal-title { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 18px; }
.modal-footer { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }

.editor-toolbar { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.editor-toolbar .btn { padding: 4px 10px; font-size: 12px; }

/* ============ 其他 ============ */
.empty-tip { text-align: center; color: var(--text-2); padding: 42px 0; font-size: 14px; }

.pagination {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 14px;
  color: var(--text-2);
  font-size: 13px;
}

.reply-box {
  background: var(--bg-soft);
  border-left: 3px solid var(--brand);
  border-radius: var(--radius);
  padding: 9px 12px;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-2);
  max-width: 260px;
}

/* ============ Toast ============ */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-16px);
  background: #0f172a;
  color: #e2e8f0;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: 13px;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease, transform .3s ease;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ============ 响应式 ============ */
@media (max-width: 960px) {
  .sidebar { width: 60px; }
  .sidebar-logo span, .nav-item span { display: none; }
  .main { margin-left: 60px; }
  .form-row { grid-template-columns: 1fr; }
  .search-input { width: 100%; }
  .content { padding: 16px; }
}
/* ============ 登录页双选项卡 / 微信登录 / 封面预览 ============ */
.login-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-soft);
  padding: 4px;
  border-radius: var(--radius);
  margin-bottom: 22px;
}

.login-tab {
  flex: 1;
  padding: 9px 0;
  border: none;
  background: transparent;
  border-radius: 4px;
  color: var(--text-2);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color .2s, color .2s;
}
.login-tab.active { background: var(--card); color: var(--brand); }

.wx-code {
  text-align: center;
  font-size: 42px;
  font-weight: 800;
  letter-spacing: 12px;
  color: var(--brand);
  padding: 14px 0 4px;
  font-family: "SF Mono", Consolas, "Courier New", monospace;
}

.wx-hint { color: var(--text-2); font-size: 13px; line-height: 1.9; margin: 10px 0 14px; }
.wx-status { text-align: center; color: var(--text-3); font-size: 13px; margin-bottom: 16px; min-height: 20px; }
.wx-tip { margin-top: 10px; }

.cover-preview {
  display: block;
  margin-top: 10px;
  width: 120px;
  height: 76px;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.wx-bind-box {
  margin-top: 16px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}

.wx-qr {
  display: block;
  margin: 12px auto;
  width: 190px;
  height: 190px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}

.wx-bind-status {
  color: var(--text-2);
  font-size: 13px;
}
.wx-bind-status.bound { color: var(--success); }