/* ===========================
   管理后台 - 样式
   =========================== */

:root {
  --green: #07c160;
  --bg: #f5f6f8;
  --card: #fff;
  --text: #1a1a1a;
  --text-sec: #666;
  --text-light: #999;
  --border: #e8eaed;
  --sidebar-w: 220px;
  --sidebar-bg: #1e1e2d;
  --sidebar-text: #a2a3b7;
  --sidebar-active: #fff;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  min-height: 100vh;
}

/* ===========================
   侧边栏
   =========================== */

.admin-sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 50;
}

.admin-logo {
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.admin-nav {
  flex: 1;
  padding: 12px 0;
}

.admin-nav-item {
  padding: 11px 24px;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all 0.12s;
  border-left: 3px solid transparent;
}

.admin-nav-item:hover {
  background: rgba(255,255,255,0.05);
  color: #ddd;
}

.admin-nav-item.active {
  background: rgba(7,193,96,0.08);
  color: var(--green);
  border-left-color: var(--green);
  font-weight: 500;
}

.nav-icon { font-size: 10px; width: 16px; text-align: center; }

.admin-sidebar-footer {
  padding: 16px 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.back-link {
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 13px;
}

.back-link:hover { color: #fff; }

/* ===========================
   主区域
   =========================== */

.admin-main {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-height: 100vh;
}

.admin-topbar {
  height: 56px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 40;
}

.admin-topbar h1 {
  font-size: 17px;
  font-weight: 600;
}

.admin-topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.admin-info {
  font-size: 13px;
  color: var(--text-sec);
}

.admin-logout-btn {
  padding: 6px 16px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  color: var(--text-sec);
  cursor: pointer;
}

.admin-logout-btn:hover {
  background: #f5f5f5;
  color: #d93025;
  border-color: #d93025;
}

/* ===========================
   内容区
   =========================== */

.admin-content {
  padding: 28px;
}

.admin-page {
  display: none;
}

.admin-page.active {
  display: block;
}

/* 统计卡片 */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 700px;
}

.stat-card {
  background: var(--card);
  border-radius: 10px;
  padding: 28px 24px;
  text-align: center;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

.stat-num {
  font-size: 36px;
  font-weight: 700;
  color: var(--green);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-sec);
}

/* 表格 */
.table-wrap {
  background: var(--card);
  border-radius: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.admin-table th {
  text-align: left;
  padding: 12px 16px;
  background: #f8f9fa;
  font-weight: 600;
  font-size: 13px;
  color: var(--text-sec);
  border-bottom: 1px solid var(--border);
}

.admin-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.admin-table tbody tr:hover {
  background: #f8f9fa;
}

.admin-table .role-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

.role-badge.admin {
  background: #fff3cd;
  color: #856404;
}

.role-badge.user {
  background: #e8f8ee;
  color: #1a6e3a;
}

/* ===========================
   响应式
   =========================== */

@media (max-width: 768px) {
  .admin-sidebar { width: 56px; }
  .admin-sidebar .admin-logo,
  .admin-sidebar .back-link,
  .admin-nav-item span:last-child { display: none; }
  .admin-main { margin-left: 56px; }
  .stat-grid { grid-template-columns: 1fr; }
}