/* Admin 后台通用样式 */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar {
  width: 240px;
  background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  color: #fff;
  padding: 24px 0;
  flex-shrink: 0;
  box-shadow: 4px 0 24px rgba(0,0,0,0.08);
}
.admin-sidebar .sidebar-title {
  padding: 0 24px 24px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.5px;
}
.admin-sidebar a {
  display: block;
  padding: 12px 24px;
  color: #94a3b8;
  text-decoration: none;
  font-size: 14px;
  transition: all 0.2s;
  border-left: 3px solid transparent;
  margin-left: 0;
}
.admin-sidebar a:hover {
  background: rgba(255,255,255,0.06);
  color: #fff;
}
.admin-sidebar a.active {
  background: rgba(8, 145, 178, 0.2);
  color: #22d3ee;
  border-left-color: #0891b2;
}
.admin-main {
  flex: 1;
  padding: 28px 32px;
  background: linear-gradient(180deg, #f8fafc 0%, #f0f9ff 100%);
  min-width: 0;
}
.admin-header { margin-bottom: 28px; }
.admin-header h1 { font-size: 22px; font-weight: 700; color: #0f172a; }
.admin-header p { font-size: 14px; color: #64748b; margin-top: 6px; }
.admin-card {
  background: rgba(255,255,255,0.95);
  border-radius: 16px;
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: 0 4px 20px rgba(8, 145, 178, 0.06);
  border: 1px solid rgba(224, 242, 254, 0.6);
}
.admin-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 18px; color: #334155; }
.btn { padding: 10px 20px; border-radius: 10px; font-size: 14px; cursor: pointer; border: none; transition: all 0.2s; }
.btn-primary {
  background: linear-gradient(135deg, #0891b2, #06b6d4);
  color: #fff;
  box-shadow: 0 4px 12px rgba(8, 145, 178, 0.25);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(8, 145, 178, 0.3);
}
.btn-secondary {
  background: #f1f5f9;
  color: #475569;
}
.btn-secondary:hover {
  background: #e2e8f0;
}
.btn-sm { padding: 8px 16px; font-size: 13px; border-radius: 8px; }
@media (max-width: 768px) {
  .admin-layout { flex-direction: column; }
  .admin-sidebar { width: 100%; display: flex; flex-wrap: wrap; padding: 16px; gap: 4px; }
  .admin-sidebar a { padding: 10px 16px; border-left: none; border-radius: 8px; }
  .admin-sidebar a.active { border-left: none; }
}